YARN-2882. Add an OPPORTUNISTIC ExecutionType. (Konstantinos Karanasos and Inigo Goiri via kasha)

(cherry picked from commit fb00794368e0aa7aafa9dfc8d453810f641b82b2)

hadoop-yarn-project/CHANGES.txt

@@ -0,0 +1,6514 @@
+Hadoop YARN Change Log
+
+Trunk - Unreleased
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-2882. Add an OPPORTUNISTIC ExecutionType. 
+    (Konstantinos Karanasos and Inigo Goiri via kasha)
+
+  IMPROVEMENTS
+
+    YARN-2438. yarn-env.sh cleanup (aw)
+
+    YARN-2472. yarn-daemons.sh should jsut call yarn directly (Masatake Iwasaki
+    via aw)
+
+    YARN-2437. start-yarn.sh/stop-yarn should give info (Varun Saxena via aw)
+
+    YARN-2796. deprecate sbin/yarn-daemon.sh (aw)
+
+    YARN-2980. Move health check script related functionality to hadoop-common
+    (Varun Saxena via aw)
+
+    YARN-3168. Convert site documentation from apt to markdown (Gururaj Shetty
+    via aw)
+
+    YARN-3199. Fair Scheduler documentation improvements (Rohit Agarwal via
+    aw)
+
+    YARN-2280. Resource manager web service fields are not accessible
+    (Krisztian Horvath via aw)
+
+    YARN-3261. rewrite resourcemanager restart doc to remove roadmap bits (Gururaj Shetty via aw)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-524 TestYarnVersionInfo failing if generated properties doesn't
+    include an SVN URL. (stevel)
+
+    YARN-1471. The SLS simulator is not running the preemption policy 
+    for CapacityScheduler (Carlo Curino via cdouglas)
+
+    YARN-2436. [post-HADOOP-9902] yarn application help doesn't work (aw)
+
+    YARN-2525. yarn logs command gives error on trunk (Akira AJISAKA via aw)
+
+    YARN-3002. YARN documentation needs updating post-shell rewrite (aw)
+
+    YARN-2428. LCE default banned user list should have yarn (Varun
+    Saxena via aw)
+
+    YARN-2355. MAX_APP_ATTEMPTS_ENV may no longer be a useful env var
+    for a container (Darrell Taylor via aw)
+
+    YARN-3915. scmadmin help message correction (Bibin A Chundatt via aw)
+
+Release 2.9.0 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-1856. Added cgroups based memory monitoring for containers as another
+    alternative to custom memory-monitoring. (Varun Vasudev via vinodkv)
+
+  IMPROVEMENTS
+
+    YARN-4072. ApplicationHistoryServer, WebAppProxyServer, NodeManager and
+    ResourceManager to support JvmPauseMonitor as a service.
+    (Sunil G via Stevel)
+
+    YARN-4341. add doc about timeline performance tool usage (Chang Li via
+    sjlee)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-4109. Exception on RM scheduler page loading with labels. 
+    (Mohammad Shahid Khan via rohithsharmaks)
+
+    YARN-4156. TestAMRestart#testAMBlacklistPreventsRestartOnSameNode 
+    assumes CapacityScheduler. (Anubhav Dhoot via kasha)
+
+    YARN-2934. Improve handling of container's stderr.
+    (Naganarasimha G R via gera)
+
+Release 2.8.0 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+    YARN-2336. Fair scheduler's REST API returns a missing '[' bracket JSON for
+    deep queue tree. (Kenji Kikushima and Akira Ajisaka via ozawa)
+
+  NEW FEATURES
+
+    YARN-3360. Add JMX metrics to TimelineDataManager (Jason Lowe via jeagles)
+
+    YARN-3345. Add non-exclusive node label API. (Wangda Tan via jianhe)
+
+    YARN-3365. Enhanced NodeManager to support using the 'tc' tool via
+    container-executor for outbound network traffic control. (Sidharta Seethana
+    via vinodkv)
+
+    YARN-1376. NM need to notify the log aggregation status to RM through 
+    heartbeat. (Xuan Gong via junping_du)
+
+    YARN-3348. Add a 'yarn top' tool to help understand cluster usage. (Varun
+    Vasudev via jianhe)
+
+    YARN-3347. Improve YARN log command to get AMContainer logs as well as 
+    running containers logs. (Xuan Gong via junping_du)
+
+    YARN-3443. Create a 'ResourceHandler' subsystem to ease addition of support 
+    for new resource types on the NM. (Sidharta Seethana via junping_du)
+
+    YARN-3361. CapacityScheduler side changes to support non-exclusive node
+    labels. (Wangda Tan via jianhe)
+
+    YARN-3318. Create Initial OrderingPolicy Framework and FifoOrderingPolicy.
+    (Craig Welch via wangda)
+
+    YARN-3326. Support RESTful API for getLabelsToNodes. (Naganarasimha G R
+    via ozawa)
+
+    YARN-3354. Add node label expression in ContainerTokenIdentifier to support
+    RM recovery. (Wangda Tan via jianhe)
+
+    YARN-1402. Update related Web UI and CLI with exposing client API to check
+    log aggregation status. (Xuan Gong via junping_du)
+
+    YARN-3463. Integrate OrderingPolicy Framework with CapacityScheduler.
+    (Craig Welch via wangda)
+
+    YARN-3410. YARN admin should be able to remove individual application 
+    records from RMStateStore. (Rohith Sharmaks via wangda)
+
+    YARN-3225. New parameter of CLI for decommissioning node gracefully in 
+    RMAdmin CLI. (Devaraj K via junping_du)
+
+    YARN-3366. Enhanced NodeManager to support classifying/shaping outgoing
+    network bandwidth traffic originating from YARN containers (Sidharta Seethana
+    via vinodkv)
+
+    YARN-3319. Implement a FairOrderingPolicy. (Craig Welch via wangda)
+
+    YARN-2498. Respect labels in preemption policy of capacity scheduler for
+    inter-queue preemption. (Wangda Tan via jianhe)
+
+    YARN-2619. Added NodeManager support for disk io isolation through cgroups.
+    (Varun Vasudev and Wei Yan via vinodkv)
+
+    YARN-3448. Added a rolling time-to-live LevelDB timeline store implementation.
+    (Jonathan Eagles via zjshen)
+
+    YARN-3505. Node's Log Aggregation Report with SUCCEED should not cached in 
+    RMApps. (Xuan Gong via junping_du)
+
+    YARN-3541. Add version info on timeline service / generic history web UI
+    and REST API. (Zhijie Shen via xgong)
+
+    YARN-160. Enhanced NodeManager to automatically obtain cpu/memory values from
+    underlying OS when configured to do so. (Varun Vasudev via vinodkv)
+
+    YARN-41. The RM should handle the graceful shutdown of the NM. (Devaraj K via 
+    junping_du)
+
+    YARN-1012. Report NM aggregated container resource utilization in heartbeat. 
+    (Inigo Goiri via kasha)
+
+    YARN-3116. RM notifies NM whether a container is an AM container or normal
+    task container. (Giovanni Matteo Fumarola via zjshen)
+
+    YARN-2003. Support for Application priority : Changes in RM and Capacity 
+    Scheduler. (Sunil G via wangda)
+
+    YARN-3656. LowCost: A Cost-Based Placement Agent for YARN Reservations. 
+    (Jonathan Yaniv and Ishai Menache via curino)
+
+    YARN-3852. Add docker container support to container-executor
+    (Abin Shahab via vvasudev)
+
+    YARN-3853. Add docker container runtime support to LinuxContainterExecutor.
+    (Sidharta Seethana via vvasudev)
+
+    YARN-3736. Add RMStateStore apis to store and load accepted reservations for
+    failover (adhoot via asuresh)
+
+    YARN-3948. Display Application Priority in RM Web UI.(Sunil G via rohithsharmaks)
+
+    YARN-3873. PendingApplications in LeafQueue should also use OrderingPolicy. 
+    (Sunil G via wangda)
+
+    YARN-3887. Support changing Application priority during runtime. (Sunil G
+    via jianhe)
+
+    YARN-4023. Publish Application Priority to TimelineServer. (Sunil G 
+    via rohithsharmaks)
+
+    YARN-3534. Collect memory/cpu usage on the node. (Inigo Goiri via kasha)
+
+    YARN-4055. Report node resource utilization in heartbeat. 
+    (Inigo Goiri via kasha)
+
+    YARN-2923. Support configuration based NodeLabelsProvider Service in Distributed 
+    Node Label Configuration Setup. (Naganarasimha G R)
+
+    YARN-221. NM should provide a way for AM to tell it not to aggregate logs.
+    (Ming Ma via xgong)
+
+    YARN-4014. Support user cli interface in for Application Priority.
+    (Rohith Sharma K S via jianhe)
+
+    YARN-3250. Support admin cli interface in for Application Priority.
+    (Rohith Sharma K S via jianhe)
+
+    YARN-3970. Add REST api support for Application Priority.
+    (Naganarasimha G R via vvasudev)
+
+    YARN-2884. Added a proxy service in NM to proxy the the communication
+    between AM and RM. (Kishore Chaliparambil via jianhe) 
+
+    YARN-313. Add Admin API for supporting node resource configuration in
+    command line. (Inigo Goiri, Kenji Kikushima and Junping Du 
+    via junping_du)
+
+    YARN-4034. Render cluster Max Priority in scheduler metrics in RM web
+    UI. (Rohith Sharma K S via jianhe)
+
+    YARN-3212. RMNode State Transition Update with DECOMMISSIONING state.
+    (Junping Du via wangda)
+
+    YARN-3866. AM-RM protocol changes to support container resizing. (Meng Ding
+    via jianhe)
+
+    YARN-1449. AM-NM protocol changes to support container resizing.
+    (Meng Ding & Wangda Tan via jianhe)
+
+    YARN-1645. ContainerManager implementation to support container resizing.
+    (Meng Ding & Wangda Tan via jianhe)
+
+    YARN-3867. ContainerImpl changes to support container resizing. (Meng Ding 
+    via jianhe)
+
+    YARN-1643. Make ContainersMonitor support changing monitoring size of an
+    allocated container. (Meng Ding and Wangda Tan)
+
+    YARN-1644. RM-NM protocol changes and NodeStatusUpdater implementation to
+    support container resizing. (Meng Ding via jianhe)
+
+    YARN-3868. Recovery support for container resizing. (Meng Ding via jianhe)
+
+    YARN-1651. CapacityScheduler side changes to support container resize.
+    (Wangda Tan via jianhe)
+
+    YARN-1897. CLI and core support for signal container functionality.
+    (Ming Ma via xgong)
+ 
+    YARN-261. Ability to fail AM attempts (Andrey Klochkov and
+    Rohith Sharma K S via jlowe)
+
+    YARN-3964. Support NodeLabelsProvider at Resource Manager side.
+    (Dian Fu via devaraj)
+
+    YARN-2556. Tool to measure the performance of the timeline server (Chang Li
+    via sjlee)
+
+    YARN-4262. Allow whitelisted users to run privileged docker containers.
+    (Sidharta Seethana via vvasudev)
+
+    YARN-3739. Add reservation system recovery to RM recovery process.
+    (Subru Krishnan via adhoot)
+
+    YARN-2729. Support script based NodeLabelsProvider Interface in Distributed Node Label
+    Configuration Setup. (Naganarasimha G R via rohithsharmaks)
+
+    YARN-1510. Make NMClient support change container resources. 
+    (Meng Ding via wangda)
+
+    YARN-1509. Make AMRMClient support send increase container request and 
+    get increased/decreased containers. (Meng Ding via wangda)
+
+    YARN-4184. Remove update reservation state api from state store as its not used by
+    ReservationSystem (Sean Po via asuresh)
+
+    YARN-4349. Support CallerContext in YARN. (wtan via jianhe)
+
+    YARN-3623. Add a new config to indicate the Timeline Service version. 
+    (Xuan Gong via junping_du)
+
+    YARN-3226. UI changes for decommissioning node. (Sunil G via
+    junping_du)
+
+    YARN-3458. CPU resource monitoring in Windows. (Inigo Goiri via cnauroth)
+
+    YARN-4234. New put APIs in TimelineClient for ats v1.5. (Xuan Gong via
+    junping_du)
+
+  IMPROVEMENTS
+
+    YARN-644. Basic null check is not performed on passed in arguments before
+    using them in ContainerManagerImpl.startContainer (Varun Saxena via bobby)
+
+    YARN-1880. Cleanup TestApplicationClientProtocolOnHA
+    (ozawa via harsh)
+
+    YARN-3357. Move TestFifoScheduler to FIFO package. (Rohith Sharmaks 
+    via devaraj)
+
+    YARN-3356. Capacity Scheduler FiCaSchedulerApp should use ResourceUsage to
+    track used-resources-by-label. (Wangda Tan via jianhe)
+
+    YARN-3350. YARN RackResolver spams logs with messages at info level. 
+    (Wilfred Spiegelenburg via junping_du)
+
+    YARN-2868. FairScheduler: Metric for latency to allocate first container 
+    for an application. (Ray Chiang via kasha)
+
+    YARN-3397. yarn rmadmin should skip -failover. (J.Andreina via kasha)
+
+    YARN-3288. Document and fix indentation in the DockerContainerExecutor code
+
+    YARN-2495. Allow admin specify labels from each NM (Distributed 
+    configuration for node label). (Naganarasimha G R via wangda)
+
+    YARN-3258. FairScheduler: Need to add more logging to investigate
+    allocations. (Anubhav Dhoot via ozawa)
+
+    YARN-3428. Debug log resources to be localized for a container. (kasha)
+
+    YARN-3424. Change logs for ContainerMonitorImpl's resourse monitoring
+    from info to debug. (Anubhav Dhoot via ozawa)
+
+    YARN-2901. Add errors and warning metrics page to RM, NM web UI. 
+    (Varun Vasudev via wangda)
+
+    YARN-3294. Allow dumping of Capacity Scheduler debug logs via
+    web UI for a fixed time period. (Varun Vasudev via xgong)
+
+    YARN-3293. Track and display capacity scheduler health metrics
+    in web UI. (Varun Vasudev via xgong)
+
+    YARN-3394. Enrich WebApplication proxy documentation. (Naganarasimha G R
+    via jianhe)
+
+    YARN-3404. Display queue name on application page. (Ryu Kobayashi via jianhe)
+
+    YARN-2696. Queue sorting in CapacityScheduler should consider node label.
+    (Wangda Tan via jianhe)
+
+    YARN-3451. Display attempt start time and elapsed time on the web UI.
+    (Rohith Sharmaks via jianhe)
+
+    YARN-3494. Expose AM resource limit and usage in CS QueueMetrics. (Rohith
+    Sharmaks via jianhe)
+
+    YARN-3503. Expose disk utilization percentage and bad local and log dir 
+    counts in NM metrics. (Varun Vasudev via jianhe)
+
+    YARN-3511. Add errors and warnings page to ATS. (Varun Vasudev via xgong)
+
+    YARN-3406. Display count of running containers in the RM's Web UI.
+    (Ryu Kobayashi via ozawa)
+
+    YARN-3363. add localization and container launch time to ContainerMetrics
+    at NM to show these timing information for each active container.
+    (zxu via rkanter)
+
+    YARN-3396. Handle URISyntaxException in ResourceLocalizationService. 
+    (Brahma Reddy Battula via junping_du)
+
+    YARN-3491. PublicLocalizer#addResource is too slow. (zxu via rkanter)
+
+    YARN-3523. Cleanup ResourceManagerAdministrationProtocol interface audience.
+    (Naganarasimha G R via junping_du)
+
+    YARN-3169. Drop YARN's overview document. (Brahma Reddy Battula via ozawa)
+
+    YARN-2784. Make POM project names consistent. (Rohith via devaraj)
+
+    YARN-20. More information for "yarn.resourcemanager.webapp.address" in 
+    yarn-default.xml (Bartosz Ługowski vai tgraves)
+
+    YARN-3593. Add label-type and Improve "DEFAULT_PARTITION" in Node Labels Page. 
+    (Naganarasimha G R via wangda)
+
+    YARN-3018. Unified the default value for the configuration property
+    yarn.scheduler.capacity.node-locality-delay in code and default xml file.
+    (Nijel SF via vinodkv)
+
+    YARN-2331. Distinguish shutdown during supervision vs. shutdown for
+    rolling upgrade. (Jason Lowe via xgong)
+
+    YARN-1050. Document the Fair Scheduler REST API. 
+    (Kenji Kikushima and Roman Shaposhnik via kasha)
+
+    YARN-3271. FairScheduler: Move tests related to max-runnable-apps from 
+    TestFairScheduler to TestAppRunnability. (nijel via kasha)
+
+    YARN-1912. ResourceLocalizer started without any jvm memory control.
+    (Masatake Iwasaki via xgong)
+
+    YARN-1287. Consolidate MockClocks. 
+    (Sebastian Wong and Anubhav Dhoot via kasha)
+
+    YARN-3395. FairScheduler: Trim whitespaces when using username for 
+    queuename. (Zhihai Xu via kasha)
+
+    YARN-3587. Fix the javadoc of DelegationTokenSecretManager in yarn, etc. 
+    projects. (Gabor Liptak via junping_du)
+
+    YARN-3513. Remove unused variables in ContainersMonitorImpl and add debug
+    log for overall resource usage by all containers. (Naganarasimha G R via devaraj)
+
+    YARN-3613. TestContainerManagerSecurity should init and start Yarn cluster in 
+    setup instead of individual methods. (nijel via kasha)
+
+    YARN-3579. CommonNodeLabelsManager should support NodeLabel instead of string 
+    label name when getting node-to-label/label-to-label mappings. (Sunil G via wangda)
+
+    YARN-3521. Support return structured NodeLabel objects in REST API (Sunil G via wangda)
+
+    YARN-3362. Add node label usage in RM CapacityScheduler web UI.
+    (Naganarasimha G R via wangda)
+
+    YARN-3565. NodeHeartbeatRequest/RegisterNodeManagerRequest should use 
+    NodeLabel object instead of String. (Naganarasimha G R via wangda)
+
+    YARN-3583. Support of NodeLabel object instead of plain String 
+    in YarnClient side. (Sunil G via wangda)
+
+    YARN-3684. Changed ContainerExecutor's primary lifecycle methods to use a more
+    extensible mechanism of context objects. (Sidharta Seethana via vinodkv)
+
+    YARN-3594. WintuilsProcessStubExecutor.startStreamReader leaks streams.
+    (Lars Francke via junping_du)
+
+    YARN-3647. RMWebServices api's should use updated api from CommonNodeLabelsManager 
+    to get NodeLabel object. (Sunil G via wangda)
+
+    YARN-3581. Deprecate -directlyAccessNodeLabelStore in RMAdminCLI. 
+    (Naganarasimha G R via wangda)
+
+    YARN-3722. Merge multiple TestWebAppUtils into o.a.h.yarn.webapp.util.TestWebAppUtils.
+    (Masatake Iwasaki via devaraj)
+
+    YARN-3713. Remove duplicate function call storeContainerDiagnostics in
+    ContainerDiagnosticsUpdateTransition (zxu via rkanter)
+
+    YARN-3467. Expose allocatedMB, allocatedVCores, and runningContainers metrics on 
+    running Applications in RM Web UI. (Anubhav Dhoot via kasha)
+
+    YARN-2392. Add more diags about app retry limits on AM failures. (Steve
+    Loughran via jianhe)
+
+    YARN-1462. AHS API and other AHS changes to handle tags for completed MR jobs. (xgong)
+
+    YARN-2716. Refactor ZKRMStateStore retry code with Apache Curator. 
+    (Karthik Kambatla via jianhe)
+
+    YARN-3786. Document yarn class path options.
+    (Brahma Reddy Battula via cnauroth)
+
+    YARN-3787. Allowed generic history service to load a number of applications whose
+    started time is within the given range. (Xuan Gong via zjshen)
+
+    YARN-3785. Support for Resource as an argument during submitApp call in MockRM
+    test class. (Sunil G via xgong)
+
+    YARN-3789. Improve logs for LeafQueue#activateApplications().
+    (Bibin A Chundatt via devaraj)
+
+    YARN-3148. Allow CORS related headers to passthrough in WebAppProxyServlet.
+    (Varun Saxena via devaraj)
+
+    YARN-3834. Scrub debug logging of tokens during resource localization.
+    (Chris Nauroth via xgong)
+
+    YARN-3827. Migrate YARN native build to new CMake framework (Alan Burlison
+    via Colin P. McCabe)
+
+    YARN-3800. Reduce storage footprint for ReservationAllocation. (Anubhav Dhoot
+    via curino)
+
+    YARN-3069. Document missing properties in yarn-default.xml.
+    (Ray Chiang via aajisaka)
+
+    YARN-3844. Make hadoop-yarn-project Native code -Wall-clean (Alan Burlison
+    via Colin P. McCabe)
+
+    YARN-3026. Move application-specific container allocation logic from
+    LeafQueue to FiCaSchedulerApp. (Wangda Tan via jianhe)
+
+    YARN-3950. Add unique SHELL_ID environment variable to DistributedShell
+    (Robert Kanter via jlowe)
+
+    YARN-3965. Add startup timestamp to nodemanager UI (Hong Zhiguo via jlowe)
+
+    YARN-3543. ApplicationReport should be able to tell whether the Application
+    is AM managed or not. (Rohith Sharma K S via xgong)
+
+    YARN-4004. container-executor should print output of docker logs if the docker
+    container exits with non-0 exit status. (Varun Vasudev via xgong)
+
+    YARN-3961. Expose pending, running and reserved containers of a queue in REST
+    api and yarn top (adhoot via asuresh)
+
+    YARN-4019. Add JvmPauseMonitor to ResourceManager and NodeManager. (Robert Kanter
+    via junping_du)
+
+    YARN-3974. Refactor the reservation system test cases to use parameterized 
+    base test. (subru via curino)
+
+    YARN-3966. Fix excessive loggings in CapacityScheduler. (Jian He via wangda)
+
+    YARN-4026. Refactored ContainerAllocator to accept a list of priorites
+    rather than a single priority. (Wangda Tan via jianhe)
+
+    YARN-4031. Add JvmPauseMonitor to ApplicationHistoryServer and
+    WebAppProxyServer (djp via rkanter)
+
+    YARN-4057. If ContainersMonitor is not enabled, only print
+    related log info one time. (Jun Gong via zxu)
+
+    YARN-1556. NPE getting application report with a null appId. (Weiwei Yang via 
+    junping_du)
+
+    YARN-4121. Fix typos in capacity scheduler documentation.
+    (Kai Sasaki via vvasudev)
+
+    YARN-4086. Allow Aggregated Log readers to handle HAR files (rkanter)
+
+    YARN-4145. Make RMHATestBase abstract so its not run when running all
+    tests under that namespace (adhoot via rkanter)
+
+    YARN-2005. Blacklisting support for scheduling AMs. (Anubhav Dhoot via kasha)
+
+    YARN-3717. Expose app/am/queue's node-label-expression to RM web UI / 
+    CLI / REST-API. (Naganarasimha G R via wangda)
+
+    YARN-4149. yarn logs -am should provide an option to fetch all the log files
+    (Varun Vasudev via xgong)
+
+    YARN-2597. MiniYARNCluster should propagate reason for AHS not starting.
+    (stevel)
+
+    MAPREDUCE-6478. Add an option to skip cleanupJob stage or ignore cleanup
+    failure during commitJob. (Junping Du via wangda)
+
+    YARN-3920. FairScheduler container reservation on a node should be
+    configurable to limit it to large containers (adhoot via asuresh)
+
+    HADOOP-12428. Fix inconsistency between log-level guards and statements.
+    (Jagadesh Kiran N and Jackie Chang via ozawa)
+
+    YARN-4095. Avoid sharing AllocatorPerContext object in LocalDirAllocator
+    between ShuffleHandler and LocalDirsHandlerService. (Zhihai Xu via jlowe)
+
+    YARN-4176. Resync NM nodelabels with RM periodically for distributed nodelabels. 
+    (Bibin A Chundatt via wangda)
+
+    YARN-4215. RMNodeLabels Manager Need to verify and replace node labels for the 
+    only modified Node Label Mappings in the request. (Naganarasimha G R via wangda)
+
+    YARN-3943. Use separate threshold configurations for disk-full detection
+    and disk-not-full detection. (Zhihai Xu via jlowe)
+
+    YARN-4252. Log container-executor invocation details when exit code is non-zero.
+    (Sidharta Seethana via vvasudev)
+
+    YARN-4258. Add support for controlling capabilities for docker containers.
+    (Sidharta Seethana via vvasudev)
+
+    YARN-4162. CapacityScheduler: Add resource usage by partition and queue capacity 
+    by partition to REST API. (Naganarasimha G R via wangda)
+
+    YARN-4170. AM need to be notified with priority in AllocateResponse.
+    (Sunil G via jianhe)
+
+    YARN-4267. Add additional logging to container launch implementations in
+    container-executor. (Sidharta Seethana via vvasudev)
+
+    YARN-3985. Make ReservationSystem persist state using RMStateStore
+    reservation APIs. (adhoot via asuresh)
+
+    YARN-4243. Add retry on establishing Zookeeper conenction in 
+    EmbeddedElectorService#serviceInit. (Xuan Gong via junping_du)
+
+    YARN-2913. Fair scheduler should have ability to set MaxResourceDefault for
+    each queue. (Siqi Li via mingma)
+
+    YARN-4296. DistributedShell Log.info is not friendly.
+    (Xiaowei Wang via stevel)
+
+    YARN-3738. Add support for recovery of reserved apps running under dynamic
+    queues (subru via asuresh)
+
+    YARN-4285. Display resource usage as percentage of queue and cluster in the
+    RM UI (Varun Vasudev via wangda)
+
+    YARN-3216. Max-AM-Resource-Percentage should respect node labels. 
+    (Sunil G via wangda)
+
+    YARN-4310. FairScheduler: Log skipping reservation messages at DEBUG level (asuresh)
+
+    YARN-4279. Mark ApplicationId and ApplicationAttemptId static methods as @Public,
+    @Unstable. (stevel)
+
+    YARN-3454. Add efficient merge operation to RLESparseResourceAllocation
+    (Carlo Curino via asuresh)
+
+    YARN-3980. Plumb resource-utilization info in node heartbeat through to the 
+    scheduler. (Inigo Goiri via kasha)
+
+    YARN-4132. Separate configs for nodemanager to resourcemanager connection
+    timeout and retries (Chang Li via jlowe)
+
+    YARN-4292. ResourceUtilization should be a part of NodeInfo REST API.
+    (Sunil G via wangda)
+
+    YARN-4405. Support node label store in non-appendable file system. (Wangda
+    Tan via jianhe)
+
+    YARN-4358. Reservation System: Improve relationship between SharingPolicy
+    and ReservationAgent. (Carlo Curino via asuresh)
+
+    YARN-3456. Improve handling of incomplete TimelineEntities. (Varun Saxena 
+    via rohithsharmaks)
+
+    YARN-4248. REST API for submit/update/delete Reservations. (curino)
+
+    YARN-3946. Update exact reason as to why a submitted app is in ACCEPTED state to 
+    app's diagnostic message. (Naganarasimha G R via wangda)
+
+    YARN-4309. Add container launch related debug information to container logs
+    when a container fails. (Varun Vasudev via wangda)
+
+    YARN-4418. AM Resource Limit per partition can be updated to ResourceUsage as well.
+    (Sunil G via wangda)
+    
+    YARN-4207. Add a non-judgemental YARN app completion status. (Rich Haase via sseth)
+
+    YARN-4293. ResourceUtilization should be a part of yarn node CLI. (Sunil G via wangda)
+
+    YARN-4164. Changed updateApplicationPriority API to return the updated
+    application priority. (Rohith Sharma K S via jianhe)
+
+    YARN-4480. Clean up some inappropriate imports. (Kai Zheng via umamahesh)
+
+    YARN-4290. Add -showDetails option to YARN Nodes CLI to print all nodes reports
+    information. (Sunil G via wangda)
+
+  OPTIMIZATIONS
+
+    YARN-3339. TestDockerContainerExecutor should pull a single image and not
+    the entire centos repository. (Ravindra Kumar Naik via raviprak)
+
+    YARN-3469. ZKRMStateStore: Avoid setting watches that are not required. 
+    (Jun Gong via kasha)
+
+    YARN-3006. Improve the error message when attempting manual failover with 
+    auto-failover enabled. (Akira AJISAKA via wangda)
+
+    YARN-3547. FairScheduler: Apps that have no resource demand should not participate 
+    scheduling. (Xianyin Xin via kasha)
+
+    YARN-3259. FairScheduler: Trigger fairShare updates on node events. 
+    (Anubhav Dhoot via kasha)
+
+    YARN-2768. Avoid cloning Resource in FSAppAttempt#updateDemand.
+    (Hong Zhiguo via kasha)
+
+    YARN-3983. Refactored CapacityScheduleri#FiCaSchedulerApp to easier extend
+    container allocation logic. (Wangda Tan via jianhe)
+
+    YARN-3635. Refactored current queue mapping implementation in CapacityScheduler
+    to use a generic PlacementManager framework. (Wangda Tan via jianhe)
+
+    YARN-4066. Large number of queues choke fair scheduler.
+    (Johan Gustavsson via kasha)
+
+  BUG FIXES
+
+    YARN-3197. Confusing log generated by CapacityScheduler. (Varun Saxena 
+    via devaraj)
+
+    YARN-3305. Normalize AM resource request on app submission. (Rohith Sharmaks
+    via jianhe)
+
+    YARN-3205 FileSystemRMStateStore should disable FileSystem Cache to avoid
+    get a Filesystem with an old configuration. (Zhihai Xu via ozawa)
+
+    YARN-3269. Yarn.nodemanager.remote-app-log-dir could not be configured to 
+    fully qualified path. (Xuan Gong via junping_du)
+
+    YARN-3241. FairScheduler handles "invalid" queue names inconsistently. 
+    (Zhihai Xu via kasha)
+
+    YARN-3383. AdminService should use "warn" instead of "info" to log exception 
+    when operation fails. (Li Lu via wangda)
+
+    YARN-3400. [JDK 8] Build Failure due to unreported exceptions in
+    RPCUtil (rkanter)
+
+    YARN-3412. RM tests should use MockRM where possible. (kasha)
+
+    YARN-3425. NPE from RMNodeLabelsManager.serviceStop when 
+    NodeLabelsManager.serviceInit failed. (Bibin A Chundatt via wangda)
+
+    YARN-3415. Non-AM containers can be counted towards amResourceUsage of a
+    Fair Scheduler queue (Zhihai Xu via Sandy Ryza)
+
+    YARN-3435. AM container to be allocated Appattempt AM container shown as null.
+    (Bibin A Chundatt via xgong)
+
+    YARN-2666. TestFairScheduler.testContinuousScheduling fails Intermittently.
+    (Zhihai Xu via ozawa)
+
+    YARN-3429. TestAMRMTokens.testTokenExpiry fails Intermittently with
+    error message:Invalid AMRMToken (zxu via rkanter)
+
+    YARN-3110. Few issues in ApplicationHistory web ui. (Naganarasimha G R via xgong)
+
+    YARN-3459. Fix failiure of TestLog4jWarningErrorMetricsAppender.
+    (Varun Vasudev via wangda)
+
+    YARN-3266. RMContext#inactiveNodes should have NodeId as map key.
+    (Chengbing Liu via jianhe)
+
+    YARN-3436. Fix URIs in documantion of YARN web service REST APIs.
+    (Bibin A Chundatt via ozawa)
+
+    YARN-3021. YARN's delegation-token handling disallows certain trust setups
+    to operate properly over DistCp. (Yongjun Zhang via jianhe)
+
+    YARN-3136. Fixed a synchronization problem of
+    AbstractYarnScheduler#getTransferredContainers. (Sunil G via jianhe)
+
+    YARN-3495. Confusing log generated by FairScheduler.
+    (Brahma Reddy Battula via ozawa)
+
+    YARN-3387. Previous AM's container completed status couldn't pass to current
+    AM if AM and RM restarted during the same time. (sandflee via jianhe)
+
+    YARN-3444. Fix typo capabililty. (Gabor Liptak via aajisaka)
+
+    YARN-3530. ATS throws exception on trying to filter results without otherinfo.
+    (zhijie shen via xgong)
+
+    YARN-2740. Fix NodeLabelsManager to properly handle node label modifications 
+    when distributed node label configuration enabled. (Naganarasimha G R via wangda)
+
+    YARN-3517. RM web ui for dumping scheduler logs should be for admins only
+    (Varun Vasudev via tgraves)
+
+    YARN-3533. Test: Fix launchAM in MockRM to wait for attempt to be scheduled.
+    (Anubhav Dhoot via jianhe)
+
+    YARN-3564. Fix TestContainerAllocation.testAMContainerAllocationWhenDNSUnavailable 
+    fails randomly. (Jian He via wangda)
+
+    YARN-2893. AMLaucher: sporadic job failures due to EOFException in
+    readTokenStorageStream. (Zhihai Xu via gera)
+
+    YARN-2454. Fix compareTo of variable UNBOUNDED in o.a.h.y.util.resource.Resources.
+    (Xu Yang via junping_du)
+
+    YARN-1993. Cross-site scripting vulnerability in TextView.java. (Kenji Kikushima
+    via ozawa)
+
+    YARN-3097. Logging of resource recovery on NM restart has redundancies
+    (Eric Payne via jlowe)
+
+    YARN-3375. NodeHealthScriptRunner.shouldRun() check is performing 3 times for 
+    starting NodeHealthScriptRunner. (Devaraj K via wangda)
+
+    YARN-2725. Added test cases of retrying creating znode in ZKRMStateStore.
+    (Tsuyoshi Ozawa via jianhe)
+
+    YARN-3552. RM Web UI shows -1 running containers for completed apps
+    (Rohith via jlowe)
+
+    YARN-2123. Progress bars in Web UI always at 100% due to non-US locale.
+    (Akira AJISAKA via xgong)
+
+    YARN-3343. Increased TestCapacitySchedulerNodeLabelUpdate#testNodeUpdate
+    timeout. (Rohith Sharmaks via jianhe)
+
+    YARN-3582. NPE in WebAppProxyServlet. (jian he via xgong)
+    
+    YARN-3577. Misspelling of threshold in log4j.properties for tests.
+    (Brahma Reddy Battula via aajisaka)
+
+    YARN-3584. Fixed attempt diagnostics format shown on the UI. (nijel via
+    jianhe)
+
+    YARN-1832. Fix wrong MockLocalizerStatus#equals implementation.
+    (Hong Zhiguo via aajisaka)
+
+    YARN-3572. Correct typos in WritingYarnApplications.md.
+    (Gabor Liptak via aajisaka)
+
+    YARN-3592. Fix typos in RMNodeLabelsManager. (Sunil G via devaraj)
+
+    YARN-3589. RM and AH web UI display DOCTYPE wrongly. (Rohith via ozawa)
+
+    YARN-3600. AM container link is broken (Naganarasimha G R via tgraves)
+
+    YARN-3604. Fixed ZKRMStateStore#removeApplication to also disable watch.
+    (zhihai xu via jianhe)
+
+    YARN-3473. Fix RM Web UI configuration for some properties (rchiang via rkanter)
+
+    YARN-2206. Updated document for applications REST API response examples. (Kenji
+    Kikushima and Brahma Reddy Battula via zjshen)
+
+    YARN-3602. TestResourceLocalizationService.testPublicResourceInitializesLocalDir
+    fails Intermittently due to IOException from cleanup. (zhihai xu via xgong)
+
+    YARN-3629. NodeID is always printed as "null" in node manager initialization log.
+    (nijel via devaraj)
+
+    YARN-2921. Fix MockRM/MockAM#waitForState sleep too long. 
+    (Tsuyoshi Ozawa via wangda)
+
+    YARN-1519. Check in container-executor if sysconf is implemented before
+    using it (Radim Kolar and Eric Payne via raviprak)
+
+    YARN-2421. RM still allocates containers to an app in the FINISHING
+    state (Chang Li via jlowe)
+
+    YARN-3302. TestDockerContainerExecutor should run automatically if it can
+    detect docker in the usual place (Ravindra Kumar Naik via raviprak)
+
+    YARN-2821. Fixed a problem that DistributedShell AM may hang if restarted.
+    (Varun Vasudev via jianhe)
+
+    YARN-3654. ContainerLogsPage web UI should not have meta-refresh. (Xuan Gong
+    via jianhe)
+
+    YARN-3707. RM Web UI queue filter doesn't work. (Wangda Tan via jianhe)
+
+    YARN-3632. Ordering policy should be allowed to reorder an application when
+    demand changes. (Craig Welch via jianhe)
+
+    YARN-3716. Node-label-expression should be included by 
+    ResourceRequestPBImpl.toString. (Xianyin Xin via wangda)
+
+    YARN-3751. Fixed AppInfo to check if used resources are null. (Sunil G via
+    zjshen)
+
+    YARN-3762. FairScheduler: CME on FSParentQueue#getQueueUserAclInfo. (kasha)
+
+    YARN-3749. We should make a copy of configuration when init MiniYARNCluster
+    with multiple RMs. (Chun Chen via xgong)
+
+    YARN-3766. Fixed the apps table column error of generic history web UI.
+    (Xuan Gong via zjshen)
+
+    YARN-3655. FairScheduler: potential livelock due to maxAMShare limitation
+    and container reservation. (Zhihai Xu via kasha)
+
+    YARN-3747. TestLocalDirsHandlerService should delete the created test directory logDir2.
+    (David Moore via devaraj)
+
+    YARN-3778. Fix Yarn resourcemanger CLI usage. (Brahma Reddy Battula via xgong)
+
+    YARN-3794. TestRMEmbeddedElector fails because of ambiguous LOG reference.
+    (Chengbing Liu via devaraj)
+
+    YARN-3714. AM proxy filter can not get RM webapp address from
+    yarn.resourcemanager.hostname.rm-id. (Masatake Iwasaki via xgong)
+
+    YARN-3617. Fix WindowsResourceCalculatorPlugin.getCpuFrequency()
+    returning always -1. (J.Andreina via devaraj)
+
+    YARN-3824. Fix two minor nits in member variable properties
+    of YarnConfiguration. (Ray Chiang via devaraj)
+
+    YARN-3835. hadoop-yarn-server-resourcemanager test package bundles
+    core-site.xml, yarn-site.xml (vamsee via rkanter)
+
+    YARN-3790. usedResource from rootQueue metrics may get stale data for FS
+    scheduler after recovering the container (Zhihai Xu via rohithsharmaks)
+
+    YARN-3826. Race condition in ResourceTrackerService leads to
+    wrong diagnostics messages. (Chengbing Liu via devaraj)
+
+    YARN-3745. SerializedException should also try to instantiate internal
+    exception with the default constructor. (Lavkesh Lahngir via devaraj)
+
+    YARN-2871. TestRMRestart#testRMRestartGetApplicationList sometime fails in trunk.
+    (zhihai xu via xgong)
+
+    YARN-3859. LeafQueue doesn't print user properly for application add.
+    (Varun Saxena via devaraj)
+
+    YARN-3860. rmadmin -transitionToActive should check the state of non-target node.
+    (Masatake Iwasaki via junping_du)
+
+    YARN-3695. ServerProxy (NMProxy, etc.) shouldn't retry forever for non
+    network exception. (Raju Bairishetti via jianhe)
+
+    YARN-3770. SerializedException should also handle java.lang.Error on
+    de-serialization. (Lavkesh Lahngir via jianhe)
+
+    YARN-3768. ArrayIndexOutOfBoundsException with empty environment variables.
+    (Zhihai Xu via gera)
+
+    YARN-3823. Fix mismatch in default values for 
+    yarn.scheduler.maximum-allocation-vcores property. (Ray Chiang via devaraj)
+
+    YARN-3830. AbstractYarnScheduler.createReleaseCache may try to clean a null
+    attempt. (nijel via devaraj)
+
+    YARN-3875. FSSchedulerNode#reserveResource() doesn't print Application Id
+    properly in log. (Bibin A Chundatt via devaraj)
+
+    YARN-3882. AggregatedLogFormat should close aclScanner and ownerScanner
+    after create them. (zhihai xu via xgong)
+
+    YARN-3837. javadocs of TimelineAuthenticationFilterInitializer give wrong
+    prefix for auth options. (Bibin A Chundatt via devaraj)
+
+    YARN-2194. Fix bug causing CGroups functionality to fail on RHEL7.
+    (Wei Yan via vvasudev)
+
+    YARN-3892. Fixed NPE on RMStateStore#serviceStop when
+    CapacityScheduler#serviceInit fails. (Bibin A Chundatt via jianhe)
+
+    YARN-3888. ApplicationMaster link is broken in RM WebUI when appstate is NEW.
+    (Bibin A Chundatt via xgong)
+
+    YARN-3917. getResourceCalculatorPlugin for the default should intercept all
+    exceptions. (gera)
+
+    YARN-3894. RM startup should fail for wrong CS xml NodeLabel capacity
+    configuration. (Bibin A Chundatt via wangda)
+
+    YARN-3381. Fix typo InvalidStateTransitonException.
+    (Brahma Reddy Battula via aajisaka)
+
+    YARN-3453. Ensure preemption logic in FairScheduler uses DominantResourceCalculator
+    in DRF queues to prevent unnecessary thrashing. (asuresh)
+
+    YARN-3174. Consolidate the NodeManager and NodeManagerRestart documentation 
+    into one. (Masatake Iwasaki via ozawa)
+
+    YARN-3805. Update the documentation of Disk Checker based on YARN-90.
+    (Masatake Iwasaki via ozawa)
+
+    YARN-3930. FileSystemNodeLabelsStore should make sure edit log file closed when 
+    exception is thrown. (Dian Fu via wangda)
+
+    YARN-3885. ProportionalCapacityPreemptionPolicy doesn't preempt if queue is 
+    more than 2 level. (Ajith S via wangda)
+
+    YARN-3932. SchedulerApplicationAttempt#getResourceUsageReport and UserInfo 
+    should based on total-used-resources. (Bibin A Chundatt via wangda)
+
+    YARN-3954. Fix TestYarnConfigurationFields#testCompareConfigurationClassAgainstXml.
+    (varun saxena via rohithsharmaks)
+
+    YARN-3956. Fix TestNodeManagerHardwareUtils fails on Mac (Varun Vasudev via wangda)
+
+    YARN-3941. Proportional Preemption policy should try to avoid sending duplicate 
+    PREEMPT_CONTAINER event to scheduler. (Sunil G via wangda)
+
+    YARN-3900. Protobuf layout of yarn_security_token causes errors in other protos
+    that include it (adhoot via rkanter)
+
+    YARN-3845. Scheduler page does not render RGBA color combinations in IE11. 
+    (Contributed by Mohammad Shahid Khan)
+
+    YARN-3957. FairScheduler NPE In FairSchedulerQueueInfo causing scheduler page to 
+    return 500. (Anubhav Dhoot via kasha)
+
+    YARN-3973. Recent changes to application priority management break 
+    reservation system from YARN-1051. (Carlo Curino via wangda)
+
+    YARN-3958. TestYarnConfigurationFields should be moved to hadoop-yarn-api
+    module. (Varun Saxena via aajisaka)
+
+    YARN-3846. RM Web UI queue filter is not working for sub queue.
+    (Mohammad Shahid Khan via jianhe)
+
+    YARN-3982. container-executor parsing of container-executor.cfg broken in
+    trunk and branch-2. (Varun Vasudev via xgong)
+
+    YARN-3919. NPEs' while stopping service after exception during
+    CommonNodeLabelsManager#start. (varun saxane via rohithsharmaks)
+
+    YARN-3963. AddNodeLabel on duplicate label addition shows success.
+    (Bibin A Chundatt via wangda)
+
+    YARN-3971. Skip RMNodeLabelsManager#checkRemoveFromClusterNodeLabelsOfQueue 
+    on nodelabel recovery. (Bibin A Chundatt via wangda)
+
+    YARN-433. When RM is catching up with node updates then it should not expire
+    acquired containers. (Xuan Gong via zxu)
+
+    YARN-3992. TestApplicationPriority.testApplicationPriorityAllocation fails 
+    intermittently. (Contributed by Sunil G)
+
+    YARN-3987. Send AM container completed msg to NM once AM finishes.
+    (sandflee via jianhe)
+
+    YARN-4028. AppBlock page key update and diagnostics value null on recovery
+    (Bibin A Chundatt via xgong)
+
+    YARN-3986. getTransferredContainers in AbstractYarnScheduler should be present
+    in YarnScheduler interface instead. (Varun Saxena via rohithsharmaks)
+
+    YARN-4082. Container shouldn't be killed when node's label updated.
+    (Wangda Tan via vvasudev)
+
+    YARN-4073. Removed unused ApplicationACLsManager in ContainerManagerImpl constructor.
+    (Naganarasimha G R via rohithsharmaks)
+
+    YARN-4024. YARN RM should avoid unnecessary resolving IP when NMs doing heartbeat.
+    (Hong Zhiguo via wangda)
+
+    YARN-3591. Resource localization on a bad disk causes subsequent containers failure.
+    (Lavkesh Lahngir via vvasudev)
+
+    YARN-4106. NodeLabels for NM in distributed mode is not updated even after
+    clusterNodelabel addition in RM. (Bibin A Chundatt via wangda)
+
+    YARN-4115. Reduce loglevel of ContainerManagementProtocolProxy to Debug
+    (adhoot via rkanter)
+
+    YARN-4151. Fix findbugs errors in hadoop-yarn-server-common module.
+    (Meng Ding via wangda)
+
+    YARN-4078. Add getPendingResourceRequestForAttempt in YarnScheduler interface.
+    (Naganarasimha G R via jianhe)
+
+    YARN-4135. Improve the assertion message in MockRM while failing after waiting for the state.
+    (Nijel S F via rohithsharmaks)
+
+    YARN-4167. NPE on RMActiveServices#serviceStop when store is null. (Bibin A Chundatt via rohithsharmaks)
+
+    YARN-4113. RM should respect retry-interval when uses RetryPolicies.RETRY_FOREVER. 
+    (Sunil G via wangda)
+
+    YARN-4188. Make MoveApplicationAcrossQueues abstract, newInstance static.
+    (Giovanni Matteo Fumarola via cdouglas)
+
+    YARN-4171. Fix findbugs warnings in YARN-1197 branch. (Wangda Tan via jianhe)
+
+    YARN-4152. NodeManager crash with NPE when LogAggregationService#stopContainer called for 
+    absent container. (Bibin A Chundatt via rohithsharmaks)
+
+    YARN-4044. Running applications information changes such as movequeue is not published to 
+    TimeLine server. (Sunil G via rohithsharmaks)
+
+    YARN-4204. ConcurrentModificationException in FairSchedulerQueueInfo. (adhoot)
+
+    YARN-4141. Runtime Application Priority change should not throw exception
+    for applications at finishing states (Sunil G via jlowe)
+
+    YARN-4228. FileSystemRMStateStore use IOUtils#close instead of fs#close. (Bibin A Chundatt via rohithsharmaks)
+
+    YARN-4235. FairScheduler PrimaryGroup does not handle empty groups returned 
+    for a user. (Anubhav Dhoot via rohithsharmaks)
+
+    YARN-4140. RM container allocation delayed incase of app submitted to 
+    Nodelabel partition. (Bibin A Chundatt via wangda)
+
+    YARN-4201. AMBlacklist does not work for minicluster. (Jun Gong via zxu)
+
+    YARN-4230. RM crashes with NPE when increasing container resource if there is no headroom left.
+    (Meng Ding via jianhe)
+
+    YARN-4017. container-executor overuses PATH_MAX. (Sidharta Seethana via vvasudev)
+
+    YARN-4253. Standardize on using PrivilegedOperationExecutor for all
+    invocations of container-executor in LinuxContainerExecutor. (Sidharta Seethana via vvasudev)
+
+    YARN-4255. container-executor does not clean up docker operation command files.
+    (Sidharta Seethana via vvasudev)
+
+    YARN-4250. NPE in AppSchedulingInfo#isRequestLabelChanged. (Brahma Reddy Battula via rohithsharmaks)
+
+    YARN-4000. RM crashes with NPE if leaf queue becomes parent queue during restart. 
+    (Varun Saxena via jianhe)
+
+    YARN-4155. TestLogAggregationService.testLogAggregationServiceWithInterval failing
+    (Bibin A Chundatt via stevel)
+
+    YARN-4270. Limit application resource reservation on nodes for non-node/rack
+    specific requests (asuresh)
+
+    YARN-4256. YARN fair scheduler vcores with decimal values. (Jun Gong via zxu)
+
+    YARN-4294. [JDK8] Fix javadoc errors caused by wrong reference and illegal
+    tag. (aajisaka)
+
+    YARN-4289. TestDistributedShell failing with bind exception.
+    (Brahma Reddy Battula via stevel)
+
+    YARN-3724. Use POSIX nftw(3) instead of fts(3) (Alan Burlison via aw)
+
+    YARN-4246. NPE while listing app attempt. (Nijel S F via rohithsharmaks)
+
+    YARN-3528. Tests with 12345 as hard-coded port break jenkins.
+    (Brahma Reddy Battula via ozawa)
+
+    YARN-4223. Fixed findbugs warnings in hadoop-yarn-server-nodemanager project
+    (varun saxena via rohithsharmaks)
+
+    YARN-4284. condition for AM blacklisting is too narrow (Sangjin Lee via
+    jlowe)
+
+    YARN-4169. Fix racing condition of TestNodeStatusUpdaterForLabels. 
+    (Naganarasimha G R via wangda)
+
+    YARN-4300. [JDK8] Fix javadoc errors caused by wrong tags. (aajisaka)
+
+    YARN-3573. MiniMRYarnCluster constructor that starts the timeline server
+    using a boolean should be marked deprecated. (Brahma Reddy Battula via ozawa)
+
+    YARN-4302. SLS not able start due to NPE in SchedulerApplicationAttempt
+    (Bibin A Chundatt via vvasudev)
+
+    YARN-4251. TestAMRMClientOnRMRestart#testAMRMClientOnAMRMTokenRollOverOnRMRestart
+    is failing. (Brahma Reddy Battula via ozawa)
+
+    YARN-4130. Duplicate declaration of ApplicationId in RMAppManager#submitApplication method. 
+    (Kai Sasaki via rohithsharmaks)
+
+    YARN-4288. Fixed RMProxy to retry on IOException from local host.
+    (Junping Du via jianhe)
+
+    YARN-4127. RM fail with noAuth error if switched from failover to non-failover.
+    (Varun Saxena via jianhe)
+
+    YARN-4345. yarn rmadmin -updateNodeResource doesn't work (Junping Du via
+    jlowe)
+
+    YARN-4367. SLS webapp doesn't load. (kasha).
+
+    YARN-4298. Fix findbugs warnings in hadoop-yarn-common.
+    (Sunil G via aajisaka)
+
+    YARN-4387. Fix typo in FairScheduler log message. (Xin Wang via ozawa)
+
+    YARN-4384. updateNodeResource CLI should not accept negative values for resource.
+    (Junping Du via wangda)
+
+    YARN-4408. Fix issue that NodeManager reports negative running containers. 
+    (Robert Kanter via junping_du)
+
+    YARN-4392. ApplicationCreatedEvent event time resets after RM restart/failover.
+    (Naganarasimha G R and Xuan Gong via xgong)
+
+    YARN-4431. Not necessary to do unRegisterNM() if NM get stop due to failed to connect
+    to RM. (Junping Du via rohithsharmaks)
+
+    YARN-4421. Remove dead code in RmAppImpl.RMAppRecoveredTransition.
+    (Daniel Templeton via rohithsharmaks)
+
+    YARN-4403. (AM/NM/Container)LivelinessMonitor should use monotonic time
+    when calculating period. (Junping Du via jianhe)
+
+    YARN-4402. TestNodeManagerShutdown And TestNodeManagerResync fails with
+    bind exception. (Brahma Reddy Battula via jianhe)
+
+    YARN-4440. FSAppAttempt#getAllowedLocalityLevelByTime should init the
+    lastScheduler time. (Lin Yiqun via zxu)
+
+    YARN-4452. NPE when submit Unmanaged application. (Naganarasimha G R
+    via junping_du)
+
+    YARN-4225. Add preemption status to yarn queue -status for capacity scheduler.
+    (Eric Payne via wangda)
+
+    YARN-4416. Deadlock due to synchronised get Methods in AbstractCSQueue.
+    (Naganarasimha G R via wangda)
+
+    YARN-4461. Redundant nodeLocalityDelay log in LeafQueue (Eric Payne via
+    jlowe)
+
+    YARN-4454. NM to nodelabel mapping going wrong after RM restart. 
+    (Bibin A Chundatt via wangda)
+
+    YARN-4477. FairScheduler: Handle condition which can result in an
+    infinite loop in attemptScheduling. (Tao Jie via asuresh)
+
+    YARN-4400. AsyncDispatcher.waitForDrained should be final. (Daniel Templeton 
+    via junping_du)
+
+Release 2.7.3 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-4287. Capacity Scheduler: Rack Locality improvement (Nathan Roberts via wangda)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-4326. Fix TestDistributedShell timeout as AHS in MiniYarnCluster no longer 
+    binds to default port 8188. (Meng Ding via wangda)
+
+    YARN-4347. Resource manager fails with Null pointer exception. (Jian He via wangda)
+
+    YARN-4374. RM capacity scheduler UI rounds user limit factor (Chang Li via
+    jlowe)
+
+    YARN-3849. Too much of preemption activity causing continuos killing of
+    containers across queues. (Sunil G via wangda)
+
+    YARN-3769. Consider user limit when calculating total pending resource for 
+    preemption policy in Capacity Scheduler. (Eric Payne via wangda)
+
+    YARN-4344. NMs reconnecting with changed capabilities can lead to wrong
+    cluster resource calculations (Varun Vasudev via jlowe)
+
+    YARN-4365. FileSystemNodeLabelStore should check for root dir existence on
+    startup (Kuhu Shukla via jlowe)
+
+    YARN-4380. TestResourceLocalizationService.testDownloadingResourcesOnContainerKill
+    fails intermittently. (Varun Saxena via ozawa)
+
+    YARN-4398. Remove unnecessary synchronization in RMStateStore. (Ning Ding via jianhe)
+
+    YARN-3840. Resource Manager web ui issue when sorting application by id
+    (with application having id > 9999) （Mohammad Shahid Khan & Varun Saxena
+    via jianhe)
+
+    YARN-4422. Generic AHS sometimes doesn't show started, node, or logs on App page
+    (Eric Payne via jeagles)
+
+    YARN-4439. Clarify NMContainerStatus#toString method. (Jian He via xgong)
+
+    YARN-4452. NPE when submit Unmanaged application. (Naganarasimha G R via
+    junping_du)
+
+Release 2.7.2 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-4009. CORS support for ResourceManager REST API. ( Varun Vasudev via jeagles)
+
+    YARN-3170. YARN architecture document needs updating. (Brahma Reddy Battula
+    via ozawa)
+
+    YARN-3967. Fetch the application report from the AHS if the RM does not know about it.
+    (Mit Desai via xgong)
+
+    YARN-2801. Add documentation for node labels feature. (Wangda Tan and Naganarasimha 
+    G R  via ozawa)
+
+    YARN-2513. Host framework UIs in YARN for use with the ATS (jeagles)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-3793. Several NPEs when deleting local files on NM recovery (Varun
+    Saxena via jlowe)
+
+    YARN-3508. Prevent processing preemption events on the main RM dispatcher. 
+    (Varun Saxena via wangda)
+
+    YARN-3690. [JDK8] 'mvn site' fails. (Brahma Reddy Battula via aajisaka)
+
+    YARN-3905. Application History Server UI NPEs when accessing apps run after
+    RM restart (Eric Payne via jeagles)
+
+    YARN-3535. Scheduler must re-request container resources when RMContainer transitions
+    from ALLOCATED to KILLED (rohithsharma and peng.zhang via asuresh)
+
+    YARN-3878. AsyncDispatcher can hang while stopping if it is configured for
+    draining events on stop. (Varun Saxena via jianhe)
+
+    YARN-3969. Allow jobs to be submitted to reservation that is active 
+    but does not have any allocations. (subru via curino)
+
+    YARN-3925. ContainerLogsUtils#getContainerLogFile fails to read container
+    log files from full disks. (zhihai xu via jlowe)
+
+    YARN-3857: Memory leak in ResourceManager with SIMPLE mode.
+    (mujunchao via zxu)
+
+    YARN-3893. Both RM in active state when Admin#transitionToActive failure 
+    from refeshAll() (Bibin A Chundatt via rohithsharmaks)
+
+    YARN-4103. RM WebServices missing scheme for appattempts logLinks.
+    (Jonathan Eagles via vvasudeb)
+
+    YARN-4105. Capacity Scheduler headroom for DRF is wrong (Chang Li via
+    jlowe)
+
+    YARN-4096. App local logs are leaked if log aggregation fails to initialize
+    for the app. (Jason Lowe via zxu)
+
+    YARN-4136. LinuxContainerExecutor loses info when forwarding
+    ResourceHandlerException. (Bibin A Chundatt via vvasudev)
+
+    YARN-3697. FairScheduler: ContinuousSchedulingThread can fail to shutdown.
+    (Zhihai Xu via kasha)
+
+    YARN-4126. RM should not issue delegation tokens in unsecure mode.
+    (Bibin A Chundatt via jianhe)
+
+    YARN-4158. Remove duplicate close for LogWriter in
+    AppLogAggregatorImpl#uploadLogsForContainers (Zhihai Xu via jlowe)
+
+    YARN-3433. Jersey tests failing with Port in Use -again.
+    (Brahma Reddy Battula)
+
+    YARN-3975. WebAppProxyServlet should not redirect to RM page if AHS is
+    enabled (Mit Desai via jlowe)
+
+    YARN-3624. ApplicationHistoryServer should not reverse the order of the
+    filters it gets. (Mit Desai via xgong)
+
+    YARN-4180. AMLauncher does not retry on failures when talking to NM.
+    (adhoot)
+
+    YARN-3619. ContainerMetrics unregisters during getMetrics and leads to
+    ConcurrentModificationException (Zhihai Xu via jlowe)
+
+    YARN-4209. RMStateStore FENCED state doesn’t work due to updateFencedState called 
+    by stateMachine.doTransition. (Zhihai Xu via rohithsharmaks)
+
+    YARN-4041. Slow delegation token renewal can severely prolong RM recovery
+    (Sunil G via jlowe)
+
+    YARN-2902. Killing a container that is localizing can orphan resources in
+    the DOWNLOADING state (Varun Saxena via jlowe)
+
+    YARN-4313. Race condition in MiniMRYarnCluster when getting history server
+    address. (Jian He via xgong)
+
+    YARN-3580. [JDK8] TestClientRMService.testGetLabelsToNodes fails. (Robert Kanter
+    via junping_du)
+
+    YARN-4312. TestSubmitApplicationWithRMHA fails on branch-2.7 and branch-2.6
+    as some of the test cases time out. (Varun Saxena via ozawa)
+
+    YARN-4320. TestJobHistoryEventHandler fails as AHS in MiniYarnCluster no longer
+    binds to default port 8188. (Varun Saxena via ozawa)
+
+    YARN-4354. Public resource localization fails with NPE. (Jason Lowe via 
+    junping_du)
+
+Release 2.7.1 - 2015-07-06
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-3243. CapacityScheduler should pass headroom from parent to children
+    to make sure ParentQueue obey its capacity limits. (Wangda Tan via jianhe)
+
+    YARN-3489. RMServerUtils.validateResourceRequests should only obtain queue 
+    info once. (Varun Saxena via wangda)
+
+    YARN-3539. Updated timeline server documentation and marked REST APIs evolving.
+    (Steve Loughran via zjshen)
+
+    YARN-3723. Need to clearly document primaryFilter and otherInfo value type.
+    (Zhijie Shen via xgong)
+
+    YARN-3711. Documentation of ResourceManager HA should explain configurations
+    about listen addresses. (Masatake Iwasaki via ozawa)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-3497. ContainerManagementProtocolProxy modifies IPC timeout conf
+    without making a copy. (Jason Lowe via jianhe)
+
+    YARN-2605. [RM HA] Rest api endpoints doing redirect incorrectly.
+    (Xuan Gong via stevel)
+
+    YARN-3522. Fixed DistributedShell to instantiate TimeLineClient as the
+    correct user. (Zhijie Shen via jianhe)
+
+    YARN-3351. AppMaster tracking URL is broken in HA. (Anubhav Dhoot via kasha)
+
+    YARN-3382. Some of UserMetricsInfo metrics are incorrectly set to root
+    queue metrics. (Rohit Agarwal via jianhe)
+
+    YARN-3472. Fixed possible leak in DelegationTokenRenewer#allTokens.
+    (Rohith Sharmaks via jianhe)
+
+    YARN-3465. Use LinkedHashMap to preserve order of resource requests. 
+    (Zhihai Xu via kasha)
+
+    YARN-3516. killing ContainerLocalizer action doesn't take effect when
+    private localizer receives FETCH_FAILURE status.(zhihai xu via xgong)
+
+    YARN-3485. FairScheduler headroom calculation doesn't consider 
+    maxResources for Fifo and FairShare policies. (kasha)
+
+    YARN-3301. Fixed the format issue of the new RM attempt web page.
+    (Xuan Gong via jianhe)
+
+    YARN-3385. Fixed a race-condition in ResourceManager's ZooKeeper based
+    state-store to avoid crashing on duplicate deletes. (Zhihai Xu via vinodkv)
+
+    YARN-3358. Audit log not present while refreshing Service ACLs. 
+    (Varun Saxena via devaraj)
+
+    YARN-3476. Nodemanager can fail to delete local logs if log aggregation
+    fails (Rohith via jlowe)
+
+    YARN-3434. Interaction between reservations and userlimit can result in 
+    significant ULF violation (tgraves)
+
+    YARN-3626. On Windows localized resources are not moved to the front
+    of the classpath when they should be. (Craig Welch via xgong)
+
+    YARN-3457. NPE when NodeManager.serviceInit fails and stopRecoveryStore called.
+    (Bibin A Chundatt via ozawa)
+
+    YARN-3537. NPE when NodeManager.serviceInit fails and stopRecoveryStore
+    invoked (Brahma Reddy Battula via jlowe)
+
+    YARN-3601. Fix UT TestRMFailover.testRMWebAppRedirect. (Weiwei Yang via xgong)
+
+    YARN-3677. Fix findbugs warnings in yarn-server-resourcemanager.
+    (Vinod Kumar Vavilapalli via ozawa)
+
+    YARN-3681. yarn cmd says "could not find main class 'queue'" in windows.
+    (Craig Welch and Varun Saxena via xgong)
+
+    YARN-3609. Load node labels from storage inside RM serviceStart. (Wangda
+    Tan via jianhe)
+
+    YARN-3694. Fix dead link for TimelineServer REST API.
+    (Jagadesh Kiran N via aajisaka)
+
+    YARN-3646. Applications are getting stuck some times in case of retry
+    policy forever. (Raju Bairishetti via devaraj)
+
+    YARN-3675. FairScheduler: RM quits when node removal races with 
+    continuous-scheduling on the same node. (Anubhav Dhoot via kasha)
+
+    YARN-3701. Isolating the error of generating a single app report when 
+    getting all apps from generic history service. (Zhijie Shen via xgong)
+
+    YARN-2238. filtering on UI sticks even if I move away from the page.
+    (Jian He via xgong)
+
+    YARN-3686. CapacityScheduler should trim default_node_label_expression. 
+    (Sunil G via wangda)
+
+    YARN-3764. CapacityScheduler should forbid moving LeafQueue from one parent
+    to another. (Wangda Tan via jianhe)
+
+    YARN-3804. Both RM are on standBy state when kerberos user not in yarn.admin.acl
+    (Varun Saxena via xgong)
+
+    YARN-3842. NMProxy should retry on NMNotYetReadyException. 
+    (Robert Kanter via kasha)
+
+    YARN-3809. Failed to launch new attempts because
+    ApplicationMasterLauncher's threads all hang (Jun Gong via jlowe)
+
+Release 2.7.0 - 2015-04-20
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+  
+    YARN-2179. [YARN-1492] Initial cache manager structure and context. 
+    (Chris Trezzo via kasha) 
+
+    YARN-2180. [YARN-1492] In-memory backing store for cache manager. 
+    (Chris Trezzo via kasha)
+
+    YARN-2183. [YARN-1492] Cleaner service for cache manager.
+    (Chris Trezzo and Sangjin Lee via kasha)
+
+    YARN-2186. [YARN-1492] Node Manager uploader service for cache manager. 
+    (Chris Trezzo and Sangjin Lee via kasha)
+
+    YARN-2236. [YARN-1492] Shared Cache uploader service on the Node 
+    Manager. (Chris Trezzo and Sangjin Lee via kasha)
+
+    YARN-2188. [YARN-1492] Client service for cache manager. 
+    (Chris Trezzo and Sangjin Lee via kasha)
+
+    YARN-2189. [YARN-1492] Admin service for cache manager.
+    (Chris Trezzo via kasha)
+
+    YARN-2765. Added leveldb-based implementation for RMStateStore. (Jason Lowe
+    via jianhe)
+
+    YARN-2203. [YARN-1492] Web UI for cache manager. (Chris Trezzo via kasha)
+
+    YARN-2738. [YARN-2574] Add FairReservationSystem for FairScheduler. 
+    (Anubhav Dhoot via kasha)
+
+    YARN-2881. [YARN-2574] Implement PlanFollower for FairScheduler. 
+    (Anubhav Dhoot via kasha)
+
+    YARN-2427. Added the API of moving apps between queues in RM web services.
+    (Varun Vasudev via zjshen)
+
+    YARN-2217. [YARN-1492] Shared cache client side changes. 
+    (Chris Trezzo via kasha)
+
+    YARN-2616 [YARN-913] Add CLI client to the registry to list, view
+    and manipulate entries. (Akshay Radia via stevel)
+
+    YARN-2994. Document work-preserving RM restart. (Jian He via ozawa)
+
+    YARN-2786. Created a yarn cluster CLI and seeded with one command for listing
+    node-labels collection. (Wangda Tan via vinodkv)
+
+  IMPROVEMENTS
+
+    YARN-3005. [JDK7] Use switch statement for String instead of if-else
+    statement in RegistrySecurity.java (Kengo Seki via aajisaka)
+
+    YARN-2950. Change message to mandate, not suggest JS requirement on UI.
+    (Dustin Cote via harsh)
+
+    YARN-2891. Failed Container Executor does not provide a clear error
+    message. (Dustin Cote via harsh)
+
+    YARN-1979. TestDirectoryCollection fails when the umask is unusual.
+    (Vinod Kumar Vavilapalli and Tsuyoshi OZAWA via junping_du)
+
+    YARN-2641. Decommission nodes on -refreshNodes instead of next 
+    NM-RM heartbeat. (Zhihai Xu via kasha)
+
+    YARN-2742. FairSchedulerConfiguration should allow extra spaces
+    between value and unit. (Wei Yan via kasha)
+
+    YARN-2712. TestWorkPreservingRMRestart: Augment FS tests with
+    queue and headroom checks. (Tsuyoshi Ozawa via kasha)
+
+    YARN-2735. diskUtilizationPercentageCutoff and diskUtilizationSpaceCutoff 
+    are initialized twice in DirectoryCollection. (Zhihai Xu via kasha)
+
+    YARN-570. Time strings are formated in different timezone. 
+    (Akira Ajisaka and Peng Zhang via kasha)
+
+    YARN-2780. Log aggregated resource allocation in rm-appsummary.log (Eric
+    Payne via jlowe)
+
+    YARN-2690. [YARN-2574] Make ReservationSystem and its dependent classes 
+    independent of Scheduler type. (Anubhav Dhoot via kasha)
+
+    YARN-2157. Added YARN metrics in the documentaion. (Akira AJISAKA via
+    jianhe)
+
+    YARN-2802. ClusterMetrics to include AM launch and register delays.
+    (Zhihai Xu via kasha)
+
+    YARN-2375. Allow enabling/disabling timeline server per framework.
+    (Mit Desai via jeagles)
+
+    YARN-2604. Scheduler should consider max-allocation-* in conjunction
+    with the largest node. (Robert Kanter via kasha)
+
+    YARN-2679. Add metric for container launch duration. (Zhihai Xu via kasha)
+
+    YARN-2669. FairScheduler: queue names shouldn't allow periods
+    (Wei Yan via Sandy Ryza)
+
+    YARN-2404. Removed ApplicationAttemptState and ApplicationState class in
+    RMStateStore. (Tsuyoshi OZAWA via jianhe)
+
+    YARN-2165. Added the sanity check for the numeric configuration values of
+    the timeline service. (Vasanth kumar RJ via zjshen)
+
+    YARN-2907. SchedulerNode#toString should print all resource detail instead 
+    of only memory. (Rohith via junping_du)
+
+    YARN-2136. Changed RMStateStore to ignore store opearations when fenced.
+    (Varun Saxena via jianhe)
+
+    YARN-1156. Enhance NodeManager AllocatedGB and AvailableGB metrics 
+    for aggregation of decimal values. (Tsuyoshi OZAWA via junping_du)
+
+    YARN-2056. Disable preemption at Queue level (Eric Payne via jlowe)
+
+    YARN-2762. Fixed RMAdminCLI to trim and check node-label related arguments
+    before sending to RM. (Rohith Sharmaks via jianhe)
+
+    YARN-2972. DelegationTokenRenewer thread pool never expands. (Jason Lowe
+    via junping_du)
+
+    YARN-2949. Add documentation for CGroups (Varun Vasudev via junping_du)
+
+    YARN-2970. NodeLabel operations in RMAdmin CLI get missing in help command.
+    (Varun Saxena via junping_du)
+
+    YARN-2837. Support TimeLine server to recover delegation token when
+    restarting. (Zhijie Shen via jianhe)
+
+    YARN-2993. Several fixes (missing acl check, error log msg ...) and some 
+    refinement in AdminService. (Yi Liu via junping_du)
+
+    YARN-2943. Added node-labels page on RM web UI. (Wangda Tan via jianhe)
+
+    YARN-2998. Abstract out scheduler independent PlanFollower components. 
+    (Anubhav Dhoot via kasha)
+
+    YARN-2360. Fair Scheduler: Display dynamic fair share for queues on the 
+    scheduler page. (Ashwin Shankar and Wei Yan via kasha)
+
+    YARN-2880. Added a test to make sure node labels will be recovered
+    if RM restart is enabled. (Rohith Sharmaks via jianhe)
+
+    YARN-2996. Improved synchronization and I/O operations of FS- and Mem-
+    RMStateStore. (Yi Liu via zjshen)
+
+    YARN-2956. Added missing links in YARN documentation. (Masatake Iwasaki via
+    jianhe)
+
+    YARN-2957. Create unit test to automatically compare YarnConfiguration
+    and yarn-default.xml. (rchiang via rkanter)
+
+    YARN-2643. Don't create a new DominantResourceCalculator on every
+    FairScheduler.allocate call. (kasha via rkanter)
+
+    YARN-3019. Make work-preserving-recovery the default mechanism for RM 
+    recovery. (Jian He via junping_du)
+
+    YARN-2807. Option "--forceactive" not works as described in usage of
+    "yarn rmadmin -transitionToActive". (Masatake Iwasaki via xgong)
+
+    YARN-2984. Metrics for container's actual memory usage. (kasha)
+
+    YARN-2800. Remove MemoryNodeLabelsStore and add a way to enable/disable
+    node labels feature. (Wangda Tan via ozawa)
+
+    YARN-3086. Make NodeManager memory configurable in MiniYARNCluster.
+    (Robert Metzger via ozawa)
+
+    YARN-2897. CrossOriginFilter needs more log statements (Mit Desai via
+    jeagles)
+
+    YARN-3028. Better syntax for replaceLabelsOnNode in RMAdmin CLI
+    (Rohith Sharmaks via wangda)
+
+    YARN-2932. Add entry for "preemptable" status (enabled/disabled) to 
+    scheduler web UI and queue initialize/refresh logging. 
+    (Eric Payne via wangda)
+
+    YARN-3108. ApplicationHistoryServer doesn't process -D arguments (Chang Li
+    via jeagles)
+
+    YARN-2808. Made YARN CLI list attempt’s finished containers of a running
+    application. (Naganarasimha G R via zjshen)
+
+    YARN-3085. Application summary should include the application type (Rohith
+    via jlowe)
+
+    YARN-3022. Expose Container resource information from NodeManager for
+    monitoring (adhoot via ranter)
+
+    YARN-3075. NodeLabelsManager implementation to retrieve label to node 
+    mapping (Varun Saxena via wangda)
+
+    YARN-1393. SLS: Add how-to-use instructions. (Wei Yan via kasha)
+
+    YARN-1723. AMRMClientAsync missing blacklist addition and removal
+    functionality. (Bartosz Ługowski via sseth)
+
+    YARN-3123. Made YARN CLI show a single completed container even if the app
+    is running. (Naganarasimha G R via zjshen)
+
+    YARN-1582. Capacity Scheduler: add a maximum-allocation-mb setting per
+    queue (Thomas Graves via jlowe)
+
+    YARN-1904. Ensure exceptions thrown in ClientRMService &
+    ApplicationHistoryClientService are uniform when application-attempt is
+    not found. (zjshen via acmurthy)
+
+    YARN-3144. Configuration for making delegation token failures to timeline
+    server not-fatal (Jonathan Eagles via jlowe)
+
+    YARN-3155. Refactor the exception handling code for TimelineClientImpl's 
+    retryOn method (Li Lu via wangda)
+
+    YARN-3100. Made YARN authorization pluggable. (Jian He via zjshen)
+
+    YARN-2683. [YARN-913] registry config options: document and move to
+    core-default. (stevel)
+
+    YARN-1237. Description for yarn.nodemanager.aux-services in 
+    yarn-default.xml is misleading. (Brahma Reddy Battula via ozawa)
+
+    YARN-3157. Refactor the exception handling in ConverterUtils#to*Id.
+    (Bibin A Chundatt via ozawa)
+
+    YARN-3147. Clean up RM web proxy code. (Steve Loughran via xgong)
+
+    YARN-2079. Recover NonAggregatingLogHandler state upon nodemanager
+    restart. (Jason Lowe via junping_du) 
+
+    YARN-3158. Correct log messages in ResourceTrackerService.
+    (Varun Saxena via xgong)
+
+    YARN-3179. Update use of Iterator to Iterable in RMAdminCLI and
+    CommonNodeLabelsManager. (Ray Chiang via xgong)
+
+    YARN-3182. Cleanup switch statement in ApplicationMasterLauncher#handle().
+    (Ray Chiang via ozawa)
+
+    YARN-3203. Correct a log message in AuxServices. (Brahma Reddy Battula 
+    via ozawa)
+
+    YARN-1299. Improve a log message in AppSchedulingInfo by adding application 
+    id. (Ashutosh Jindal and Devaraj K via ozawa)
+
+    YARN-1514. Utility to benchmark ZKRMStateStore#loadState for RM HA.
+    (Tsuyoshi OZAWA via jianhe)
+
+    YARN-3076. Add API/Implementation to YarnClient to retrieve label-to-node 
+    mapping. (Varun Saxena via wangda)
+
+    YARN-2799. Cleanup TestLogAggregationService based on the change in YARN-90.
+    (Zhihai Xu via junping_du)
+
+    YARN-3237. AppLogAggregatorImpl fails to log error cause.
+    (Rushabh S Shah via xgong)
+
+    YARN-3236. Cleanup RMAuthenticationFilter#AUTH_HANDLER_PROPERTY.
+    (zhihai xu via xgong)
+
+    YARN-2797. TestWorkPreservingRMRestart should use ParametrizedSchedulerTestBase
+    (Karthik Kambatla via xgong)
+
+    YARN-2797. Add -help to yarn logs and nodes CLI command. 
+    (Jagadesh Kiran N via devaraj)
+
+    YARN-3217. Remove httpclient dependency from hadoop-yarn-server-web-proxy.
+    (Brahma Reddy Battula via ozawa).
+
+    YARN-3255. RM, NM, JobHistoryServer, and WebAppProxyServer's main()
+    should support generic options. (shv)
+
+    YARN-2820. Retry in FileSystemRMStateStore when FS's operations fail 
+    due to IOException. (Zhihai Xu via ozawa)
+
+    YARN-3262. Surface application outstanding resource requests table 
+    in RM web UI. (Jian He via wangda)
+
+    YARN-3281. Added RMStateStore to StateMachine visualization list.
+    (Chengbing Liu via jianhe)
+
+    YARN-3272. Surface container locality info in RM web UI.
+    (Jian He via wangda)
+
+    YARN-3122. Metrics for container's actual CPU usage. 
+    (Anubhav Dhoot via kasha)
+
+    YARN-2190. Added CPU and memory limit options to the default container
+    executor for Windows containers. (Chuan Liu via jianhe)
+
+    YARN-3296. Mark ResourceCalculatorProcessTree class as Public for configurable
+    resource monitoring. (Hitesh Shah via junping_du)
+
+    YARN-3187. Documentation of Capacity Scheduler Queue mapping based on user
+    or group. (Gururaj Shetty via jianhe)
+
+    YARN-2854. Updated the documentation of the timeline service and the generic
+    history service. (Naganarasimha G R via zjshen)
+
+    YARN-2777. Mark the end of individual log in aggregated log.
+    (Varun Saxena via xgong)
+
+    YARN-3273. Improve scheduler UI to facilitate scheduling analysis and
+    debugging. (Rohith Sharmaks via jianhe)
+
+  OPTIMIZATIONS
+
+    YARN-2990. FairScheduler's delay-scheduling always waits for node-local and 
+    rack-local delays, even for off-rack-only requests. (kasha)
+
+  BUG FIXES
+
+    YARN-3071. Remove invalid char from sample conf in doc of FairScheduler.
+    (Masatake Iwasaki via aajisaka)
+
+    YARN-2254. TestRMWebServicesAppsModification should run against both 
+    CS and FS. (Zhihai Xu via kasha)
+
+    YARN-2713. "RM Home" link in NM should point to one of the RMs in an 
+    HA setup. (kasha)
+
+    YARN-2857. ConcurrentModificationException in ContainerLogAppender
+    (Mohammad Kamrul Islam via jlowe)
+
+    YARN-2432. RMStateStore should process the pending events before close.
+    (Varun Saxena via jianhe)
+
+    YARN-1703. Fixed ResourceManager web-proxy to close connections correctly.
+    (Rohith Sharma via vinodkv)
+
+    YARN-2870. Updated the command to run the timeline server in the document.
+    (Masatake Iwasaki via zjshen)
+
+    YARN-2878. Fix DockerContainerExecutor.apt.vm formatting. (Abin Shahab via
+    jianhe)
+
+    YARN-2315. FairScheduler: Set current capacity in addition to capacity.
+    (Zhihai Xu via kasha)
+
+    YARN-2697. Remove useless RMAuthenticationHandler. (Haosong Huang via zjshen)
+
+    YARN-2461. Fix PROCFS_USE_SMAPS_BASED_RSS_ENABLED property in
+    YarnConfiguration. (rchiang via rkanter)
+
+    YARN-2869. CapacityScheduler should trim sub queue names when parse
+    configuration. (Wangda Tan via jianhe)
+
+    YARN-2927. [YARN-1492] InMemorySCMStore properties are inconsistent. 
+    (Ray Chiang via kasha)
+
+    YARN-2931. PublicLocalizer may fail until directory is initialized by
+    LocalizeRunner. (Anubhav Dhoot via kasha)
+
+    YARN-2930. Fixed TestRMRestart#testRMRestartRecoveringNodeLabelManager
+    intermittent failure. (Wangda Tan via jianhe)
+
+    YARN-2924. Fixed RMAdminCLI to not convert node labels to lower case.
+    (Wangda Tan via jianhe)
+
+    YARN-2243. Order of arguments for Preconditions.checkNotNull() is wrong in 
+    SchedulerApplicationAttempt ctor. (devaraj)
+
+    YARN-2912 Jersey Tests failing with port in use. (varun saxena via stevel)
+
+    YARN-2356. yarn status command for non-existent application/application 
+    attempt/container is too verbose. (Sunil G via devaraj)
+
+    YARN-2914. [YARN-1492] Potential race condition in Singleton implementation of 
+    SharedCacheUploaderMetrics, CleanerMetrics, ClientSCMMetrics. (Varun Saxena via kasha)
+
+    YARN-2945. FSLeafQueue#assignContainer - document the reason for using both write and
+    read locks. (Tsuyoshi Ozawa via kasha)
+
+    YARN-2944. InMemorySCMStore can not be instantiated with ReflectionUtils#newInstance.
+    (Chris Trezzo via kasha)
+
+    YARN-2675. containersKilled metrics is not updated when the container is killed 
+    during localization. (Zhihai Xu via kasha)
+
+    YARN-2975. FSLeafQueue app lists are accessed without required locks. (kasha)
+
+    YARN-2977. Fixed intermittent TestNMClient failure.
+    (Junping Du via ozawa)
+
+    YARN-2939. Fix new findbugs warnings in hadoop-yarn-common. (Li Lu via junping_du)
+
+    YARN-2940. Fix new findbugs warnings in rest of the hadoop-yarn components. (Li Lu 
+    via junping_du)
+
+    YARN-2937. Fixed new findbugs warnings in hadoop-yarn-nodemanager. (Varun Saxena
+    via zjshen)
+
+    YARN-2946. Fixed potential deadlock in RMStateStore. (Rohith Sharmaks via
+    jianhe)
+
+    YARN-2988. Graph#save() may leak file descriptors. (Ted Yu via ozawa)
+
+    YARN-2938. Fixed new findbugs warnings in hadoop-yarn-resourcemanager and
+    hadoop-yarn-applicationhistoryservice. (Varun Saxena via zjshen)
+
+    YARN-2987. Fixed ClientRMService#getQueueInfo to check against queue and
+    app ACLs. (Varun Saxena via jianhe)
+
+    YARN-2991. Fixed DrainDispatcher to reuse the draining code path in
+    AsyncDispatcher. (Rohith Sharmaks via zjshen)
+
+    YARN-2958. Made RMStateStore not update the last sequence number when updating the
+    delegation token. (Varun Saxena via zjshen)
+
+    YARN-2230. Fixed few configs description in yarn-default.xml. (Vijay Bhat
+    via jianhe)
+
+    YARN-3010. Fixed findbugs warning in AbstractYarnScheduler. (Yi Liu via
+    jianhe)
+
+    YARN-2936. Changed YARNDelegationTokenIdentifier to set proto fields on
+    getProto method. (Varun Saxena via jianhe)
+
+    YARN-3014. Replaces labels on a host should update all NM's labels on that
+    host. (Wangda Tan via jianhe)
+
+    YARN-3027. Scheduler should use totalAvailable resource from node instead of
+    availableResource for maxAllocation. (adhoot via rkanter)
+
+    YARN-2861. Fixed Timeline DT secret manager to not reuse RM's configs.
+    (Zhijie Shen via jianhe)
+
+    YARN-3064. TestRMRestart/TestContainerResourceUsage/TestNodeManagerResync 
+    failure with allocation timeout. (Jian He via junping_du)
+
+    YARN-2815. Excluded transitive dependency of JLine in hadoop-yarn-server-common.
+    (Ferdinand Xu via zjshen)
+
+    YARN-3070. TestRMAdminCLI#testHelp fails for transitionToActive command. 
+    (Contributed by Junping Du)
+
+    YARN-3015. yarn classpath command should support same options as hadoop
+    classpath. (Contributed by Varun Saxena)
+
+    YARN-2933. Capacity Scheduler preemption policy should only consider capacity 
+    without labels temporarily. (Mayank Bansal via wangda)
+
+    YARN-2731. Fixed RegisterApplicationMasterResponsePBImpl to properly invoke 
+    maybeInitBuilder. (Carlo Curino via wangda)
+
+    YARN-3078. LogCLIHelpers lacks of a blank space before string 'does not exist'.
+    (Sam Liu via ozawa)
+
+    YARN-3082. Non thread safe access to systemCredentials in NodeHeartbeatResponse
+    processing. (Anubhav Dhoot via ozawa)
+
+    YARN-3088. LinuxContainerExecutor.deleteAsUser can throw NPE if native
+    executor returns an error (Eric Payne via jlowe)
+
+    YARN-3079. Scheduler should also update maximumAllocation when updateNodeResource.
+    (Zhihai Xu via wangda)
+
+    YARN-3029. FSDownload.unpack() uses local locale for FS case conversion, may not
+    work everywhere. (Varun Saxena via ozawa)
+
+    YARN-3077. Fixed RM to create zk root path recursively. (Chun Chen via jianhe)
+
+    YARN-3113. Release audit warning for Sorting icons.psd. (stevel via kihwal)
+
+    YARN-3056. Add verification for containerLaunchDuration
+    in TestNodeManagerMetrics. (zhihai xu via xgong)
+
+    YARN-2543. Made resource usage be published to the timeline server too.
+    (Naganarasimha G R via zjshen)
+
+    YARN-3058. Fix error message of tokens' activation delay configuration.
+    (Yi Liu via ozawa)
+
+    YARN-3101. In Fair Scheduler, fix canceling of reservations for exceeding
+    max share (Anubhav Dhoot via Sandy Ryza)
+
+    YARN-3149. Fix typo in message for invalid application id.
+    (Bibin A Chundatt via xgong)
+
+    YARN-3145. Fixed ConcurrentModificationException on CapacityScheduler
+    ParentQueue#getQueueUserAclInfo. (Tsuyoshi OZAWA via jianhe)
+
+    YARN-1537. Fix race condition in
+    TestLocalResourcesTrackerImpl.testLocalResourceCache. (xgong via acmurthy)
+
+    YARN-3089. LinuxContainerExecutor does not handle file arguments to
+    deleteAsUser (Eric Payne via jlowe)
+
+    YARN-3143. RM Apps REST API can return NPE or entries missing id and other
+    fields (jlowe)
+
+    YARN-2971. RM uses conf instead of token service address to renew timeline
+    delegation tokens (jeagles)
+
+    YARN-3090. DeletionService can silently ignore deletion task failures
+    (Varun Saxena via jlowe)
+
+    YARN-2809. Implement workaround for linux kernel panic when removing
+    cgroup (Nathan Roberts via jlowe)
+
+    YARN-3160. Fix non-atomic operation on nodeUpdateQueue in RMNodeImpl. 
+    (Chengbing Liu via junping_du)
+
+    YARN-3074. Nodemanager dies when localizer runner tries to write to a full
+    disk (Varun Saxena via jlowe)
+
+    YARN-3151. On Failover tracking url wrong in application cli for
+    KILLED application (Rohith via xgong)
+
+    YARN-1580. Documentation error regarding "container-allocation.expiry-interval-ms" 
+    (Brahma Reddy Battula via junping_du)
+
+    YARN-3104. Fixed RM to not generate new AMRM tokens on every heartbeat
+    between rolling and activation. (Jason Lowe via jianhe)
+
+    YARN-3191. Log object should be initialized with its own class. (Rohith via
+    aajisaka)
+
+    YARN-3164. RMAdmin command usage prints incorrect command name. 
+    (Bibin A Chundatt via xgong)
+
+    YARN-2847. Linux native container executor segfaults if default banned
+    user detected (Olaf Flebbe via jlowe)
+
+    YARN-2899. Run TestDockerContainerExecutorWithMocks on Linux only.
+    (Ming Ma via cnauroth)
+
+    YARN-2749. Fix some testcases from TestLogAggregationService fails in trunk. 
+    (Xuan Gong via junping_du)
+
+    YARN-3132. RMNodeLabelsManager should remove node from node-to-label mapping
+    when node becomes deactivated. (Wangda Tan via jianhe)
+
+    YARN-1615. Fix typos in description about delay scheduling. (Akira Ajisaka via 
+    ozawa)
+
+    YARN-933. Fixed InvalidStateTransitonException at FINAL_SAVING state in
+    RMApp. (Rohith Sharmaks via jianhe)
+
+    YARN-3247. TestQueueMappings should use CapacityScheduler explicitly.
+    (Zhihai Xu via ozawa)
+
+    YARN-3256. TestClientToAMTokens#testClientTokenRace is not running against 
+    all Schedulers even when using ParameterizedSchedulerTestBase. 
+    (Anubhav Dhoot via devaraj)
+
+    YARN-3270. Fix node label expression not getting set in 
+    ApplicationSubmissionContext (Rohit Agarwal via wangda)
+
+    YARN-3265. Fixed a deadlock in CapacityScheduler by always passing a queue's
+    available resource-limit from the parent queue. (Wangda Tan via vinodkv)
+
+    YARN-3131. YarnClientImpl should check FAILED and KILLED state in
+    submitApplication (Chang Li via jlowe)
+    
+    YARN-3275. CapacityScheduler: Preemption happening on non-preemptable
+    queues (Eric Payne via jlowe)
+
+    YARN-3300. Outstanding_resource_requests table should not be shown in AHS.
+    (Xuan Gong via jianhe)
+
+    YARN-3295. Fix documentation nits found in markdown conversion.
+    (Masatake Iwasaki via ozawa)
+
+    YARN-3338. Exclude jline dependency from YARN. (Zhijie Shen via xgong)
+
+    YARN-3154. Added additional APIs in LogAggregationContext to avoid aggregating
+    running logs of application when rolling is enabled. (Xuan Gong via vinodkv)
+
+    YARN-1453. [JDK8] Fix Javadoc errors caused by incorrect or illegal tags in 
+    doc comments. (Akira AJISAKA, Andrew Purtell, and Allen Wittenauer via ozawa)
+
+    YARN-3349. Treat all exceptions as failure in
+    TestFSRMStateStore#testFSRMStateStoreClientRetry. (Zhihai Xu via ozawa)
+
+    YARN-3379. Fixed missing data in localityTable and ResourceRequests table
+    in RM WebUI. (Xuan Gong via jianhe)
+
+    YARN-3384. TestLogAggregationService.verifyContainerLogs fails after
+    YARN-2777. (Naganarasimha G R via ozawa)
+
+    YARN-3336. FileSystem memory leak in DelegationTokenRenewer.
+    (Zhihai Xu via cnauroth)
+
+    YARN-2213. Change proxy-user cookie log in AmIpFilter to DEBUG.
+    (Varun Saxena via xgong)
+
+    YARN-3304. Cleaning up ResourceCalculatorProcessTree APIs for public use and
+    removing inconsistencies in the default values. (Junping Du and Karthik
+    Kambatla via vinodkv)
+
+    YARN-3430. Made headroom data available on app attempt page of RM WebUI.
+    (Xuan Gong via zjshen)
+
+    YARN-3466. Fix RM nodes web page to sort by node HTTP-address, #containers 
+    and node-label column (Jason Lowe via wangda)
+
+Release 2.6.4 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+  YARN-3857: Memory leak in ResourceManager with SIMPLE mode.
+  (mujunchao via zxu)
+
+  YARN-3535. Scheduler must re-request container resources when RMContainer transitions
+  from ALLOCATED to KILLED (rohithsharma and peng.zhang via asuresh)
+
+  YARN-4452. NPE when submit Unmanaged application. (Naganarasimha G R
+  via junping_du)
+
+Release 2.6.3 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-4241. Fix typo of property name in yarn-default.xml.
+    (Anthony Rojas via aajisaka)
+
+    YARN-2859. ApplicationHistoryServer binds to default port 8188 in MiniYARNCluster.
+    (Vinod Kumar Vavilapalli via xgong)
+
+    YARN-4344. NMs reconnecting with changed capabilities can lead to wrong
+    cluster resource calculations (Varun Vasudev via jlowe)
+
+    YARN-3925. ContainerLogsUtils#getContainerLogFile fails to read container
+    log files from full disks. (zhihai xu via jlowe)
+
+    YARN-4365. FileSystemNodeLabelStore should check for root dir existence on
+    startup (Kuhu Shukla via jlowe)
+
+    YARN-4348. ZKRMStateStore.syncInternal shouldn't wait for sync completion for
+    avoiding blocking ZK's event thread. (ozawa)
+
+    YARN-4424. Fix deadlock in RMAppImpl. (Jian he via wangda)
+
+    YARN-4434. NodeManager Disk Checker parameter documentation is not correct.
+    (Weiwei Yang via aajisaka)
+
+Release 2.6.2 - 2015-10-28
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-3727. For better error recovery, check if the directory exists before
+    using it for localization. (Zhihai Xu via jlowe)
+
+    YARN-4092. Fixed UI redirection to print useful messages when both RMs are
+    in standby mode. (Xuan Gong via jianhe)
+
+    YARN-4101. RM should print alert messages if Zookeeper and Resourcemanager
+    gets connection issue. (Xuan Gong via jianhe)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-2019. Retrospect on decision of making RM crashed if any exception throw
+    in ZKRMStateStore. (Jian He via junping_du)
+
+    YARN-4087. Followup fixes after YARN-2019 regarding RM behavior when
+    state-store error occurs. (Jian He via xgong)
+
+    YARN-3554. Default value for maximum nodemanager connect wait time is too
+    high (Naganarasimha G R via jlowe)
+
+    YARN-4005. Completed container whose app is finished is possibly not
+    removed from NMStateStore. (Jun Gong via jianhe)
+
+    YARN-3780. Should use equals when compare Resource in RMNodeImpl#ReconnectNodeTransition.
+    (zhihai xu via devaraj)
+
+    YARN-3802. Two RMNodes for the same NodeId are used in RM sometimes
+    after NM is reconnected. (zhihai xu via xgong)
+
+    YARN-3194. RM should handle NMContainerStatuses sent by NM while
+    registering if NM is Reconnected node (Rohith via jlowe)
+
+    YARN-3896. RMNode transitioned from RUNNING to REBOOTED because its response id 
+    has not been reset synchronously. (Jun Gong via rohithsharmaks)
+
+    YARN-3798. ZKRMStateStore shouldn't create new session without occurrance of 
+    SESSIONEXPIED. (ozawa and Varun Saxena)
+
+Release 2.6.1 - 2015-09-23
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-3249. Add a 'kill application' button to Resource Manager's Web UI.
+    (Ryu Kobayashi via ozawa)
+
+  IMPROVEMENTS
+
+    YARN-3230. Clarify application states on the web UI. (Jian He via wangda)
+
+    YARN-1809. Synchronize RM and TimeLineServer Web-UIs. (Zhijie Shen and
+    Xuan Gong via jianhe)
+
+    YARN-3092. Created a common ResourceUsage class to track labeled resource
+    usages in Capacity Scheduler. (Wangda Tan via jianhe)
+
+    YARN-3098. Created common QueueCapacities class in Capacity Scheduler to
+    track capacities-by-labels of queues. (Wangda Tan via jianhe)
+
+    YARN-2301. Improved yarn container command. (Naganarasimha G R via jianhe)
+
+    YARN-3978. Configurably turn off the saving of container info in Generic AHS
+    (Eric Payne via jeagles)
+
+    YARN-3248. Display count of nodes blacklisted by apps in the web UI.
+    (Varun Vasudev via xgong)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-2856. Fixed RMAppImpl to handle ATTEMPT_KILLED event at ACCEPTED state
+    on app recovery. (Rohith Sharmaks via jianhe)
+
+    YARN-2816. NM fail to start with NPE during container recovery (Zhihai Xu
+    via jlowe)
+
+    YARN-2414. RM web UI: app page will crash if app is failed before any
+    attempt has been created (Wangda Tan via jlowe)
+
+    YARN-2865. Fixed RM to always create a new RMContext when transtions from
+    StandBy to Active. (Rohith Sharmaks via jianhe)
+
+    YARN-2906. CapacitySchedulerPage shows HTML tags for a queue's Active Users.
+    (Jason Lowe via jianhe)
+
+    YARN-2905. AggregatedLogsBlock page can infinitely loop if the aggregated
+    log file is corrupted (Varun Saxena via jlowe)
+
+    YARN-2890. MiniYARNCluster should start the timeline server based on the
+    configuration. (Mit Desai via zjshen)
+
+    YARN-2894. Fixed a bug regarding application view acl when RM fails over.
+    (Rohith Sharmaks via jianhe)
+
+    YARN-2874. Dead lock in "DelegationTokenRenewer" which blocks RM to execute
+    any further apps. (Naganarasimha G R via kasha)
+
+    YARN-2910. FSLeafQueue can throw ConcurrentModificationException. 
+    (Wilfred Spiegelenburg via kasha)
+
+    YARN-2917. Fixed potential deadlock when system.exit is called in AsyncDispatcher
+    (Rohith Sharmaks via jianhe)
+
+    YARN-2964. RM prematurely cancels tokens for jobs that submit jobs (oozie)
+    (Jian He via jlowe)
+
+    YARN-1984. LeveldbTimelineStore does not handle db exceptions properly
+    (Varun Saxena via jlowe)
+
+    YARN-2952. Fixed incorrect version check in StateStore. (Rohith Sharmaks
+    via jianhe)
+
+    YARN-2340. Fixed NPE when queue is stopped during RM restart.
+    (Rohith Sharmaks via jianhe)
+
+    YARN-2992. ZKRMStateStore crashes due to session expiry. (Karthik Kambatla
+    via jianhe)
+
+    YARN-2922. ConcurrentModificationException in CapacityScheduler's LeafQueue.
+    (Rohith Sharmaks via ozawa)
+
+    YARN-2997. Fixed NodeStatusUpdater to not send alreay-sent completed
+    container statuses on heartbeat. (Chengbing Liu via jianhe)
+
+    YARN-3011. Possible IllegalArgumentException in ResourceLocalizationService
+    might lead NM to crash. (Varun Saxena via jianhe)
+
+    YARN-3103. AMRMClientImpl does not update AMRM token properly. (Jason Lowe
+    via jianhe)
+
+    YARN-3094. Reset timer for liveness monitors after RM recovery. (Jun Gong
+    via jianhe)
+
+    YARN-2246. Made the proxy tracking URL always be
+    http(s)://proxy addr:port/proxy/<appId> to avoid duplicate sections. (Devaraj
+    K via zjshen)
+
+    YARN-3207. Secondary filter matches entites which do not have the key being
+    filtered for. (Zhijie Shen via xgong)
+
+    YARN-3238. Connection timeouts to nodemanagers are retried at
+    multiple levels (Jason Lowe via xgong)
+
+    YARN-3239. WebAppProxy does not support a final tracking url which has
+    query fragments and params (Jian He via jlowe)
+
+    YARN-3222. Fixed RMNode to send scheduler events in sequential order when a
+    node reconnects. (Rohith Sharma K S via jianhe)
+
+    YARN-3231. FairScheduler: Changing queueMaxRunningApps interferes with pending 
+    jobs. (Siqi Li via kasha)
+
+    YARN-3242. Asynchrony in ZK-close can lead to ZKRMStateStore watcher receiving 
+    events for old client. (Zhihai Xu via kasha)
+
+    YARN-3227. Timeline renew delegation token fails when RM user's TGT is expired
+    (Zhijie Shen via xgong)
+
+    YARN-3287. Made TimelineClient put methods do as the correct login context.
+    (Daryn Sharp and Jonathan Eagles via zjshen)
+
+    YARN-3267. Timelineserver applies the ACL rules after applying the limit on
+    the number of records (Chang Li via jeagles)
+
+    YARN-3369. Missing NullPointer check in AppSchedulingInfo causes RM to die.
+    (Brahma Reddy Battula via wangda)
+
+    YARN-3393. Getting application(s) goes wrong when app finishes before
+    starting the attempt. (Zhijie Shen via xgong)
+
+    YARN-3055. Fixed ResourceManager's DelegationTokenRenewer to not stop token
+    renewal of applications part of a bigger workflow. (Daryn Sharp via vinodkv)
+
+    YARN-3493. RM fails to come up with error "Failed to load/recover state" 
+    when mem settings are changed. (Jian He via wangda)
+
+    YARN-3487. CapacityScheduler scheduler lock obtained unnecessarily when 
+    calling getQueue (Jason Lowe via wangda)
+
+    YARN-3024. LocalizerRunner should give DIE action when all resources are
+    localized. (Chengbing Liu via xgong)
+
+    YARN-3464. Race condition in LocalizerRunner kills localizer before 
+    localizing all resources. (Zhihai Xu via kasha)
+
+    YARN-3641. NodeManager: stopRecoveryStore() shouldn't be skipped when
+    exceptions happen in stopping NM's sub-services. (Junping Du via jlowe)
+
+    YARN-3526. ApplicationMaster tracking URL is incorrectly redirected
+    on a QJM cluster. (Weiwei Yang via xgong)
+
+    YARN-2766. Made ApplicationHistoryManager return a sorted list of apps,
+    attempts and containers. (Robert Kanter via zjshen)
+
+    YARN-3700. Made generic history service load a number of latest applications
+    according to the parameter or the configuration. (Xuan Gong via zjshen)
+
+    YARN-2900. Application (Attempt and Container) Not Found in AHS results
+    in InternalServer Error (500). (Zhijie Shen and Mit Desai via xgong)
+
+    YARN-3725. App submission via REST API is broken in secure mode due to
+    Timeline DT service address is empty. (Zhijie Shen via wangda)
+
+    YARN-3585. NodeManager cannot exit on SHUTDOWN event triggered and NM
+    recovery is enabled (Rohith Sharmaks via jlowe)
+
+    YARN-3832. Resource Localization fails on a cluster due to existing cache
+    directories (Brahma Reddy Battula via jlowe)
+
+    YARN-3850. NM fails to read files from full disks which can lead to
+    container logs being lost and other issues (Varun Saxena via jlowe)
+
+    YARN-3990. AsyncDispatcher may overloaded with RMAppNodeUpdateEvent when
+    Node is connected/disconnected (Bibin A Chundatt via jlowe)
+
+    YARN-2637. Fixed max-am-resource-percent calculation in CapacityScheduler
+    when activating applications. (Craig Welch via jianhe)
+
+    YARN-3733. Fix DominantRC#compare() does not work as expected if
+    cluster resource is empty. (Rohith Sharmaks via wangda)
+
+    YARN-2920. Changed CapacityScheduler to kill containers on nodes where
+    node labels are changed. (Wangda Tan via jianhe)
+
+    YARN-2978. Fixed potential NPE while getting queue info. (Varun Saxena via
+    jianhe)
+
+    YARN-3099. Capacity Scheduler LeafQueue/ParentQueue should use ResourceUsage
+    to track used-resources-by-label.(Wangda Tan via jianhe)
+
+    YARN-2694. Ensure only single node label specified in ResourceRequest.
+    (Wangda Tan via jianhe)
+
+    YARN-3124. Fixed CS LeafQueue/ParentQueue to use QueueCapacities to track
+    capacities-by-label. (Wangda Tan via jianhe)
+
+    YARN-2918. RM should not fail on startup if queue's configured labels do
+    not exist in cluster-node-labels. (Wangda Tan via jianhe)
+
+    YARN-3999. RM hangs on draing events. (Jian He via xgong)
+
+    YARN-4047. ClientRMService getApplications has high scheduler lock contention.
+    (Jason Lowe via jianhe)
+
+    YARN-1884. Added nodeHttpAddress into ContainerReport and fixed the link to NM
+    web page. (Xuan Gong via zjshen)
+
+    YARN-3171. Sort by Application id, AppAttempt and ContainerID doesn't work
+    in ATS / RM web ui. (Naganarasimha G R via xgong)
+
+    YARN-3740. Fixed the typo in the configuration name:
+    APPLICATION_HISTORY_PREFIX_MAX_APPS. (Xuan Gong via zjshen)
+
+    YARN-3544. Got back AM logs link on the RM web UI for a completed app.
+    (Xuan Gong via zjshen)
+
+Release 2.6.0 - 2014-11-18
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-1964. Create Docker analog of the LinuxContainerExecutor in YARN. (Abin 
+    Shahab via raviprak)
+
+    YARN-2131. Add a way to format the RMStateStore. (Robert Kanter via kasha)
+
+    YARN-1367. Changed NM to not kill containers on NM resync if RM work-preserving
+    restart is enabled. (Anubhav Dhoot via jianhe)
+
+    YARN-1366. Changed AMRMClient to re-register with RM and send outstanding requests
+    back to RM on work-preserving RM restart. (Rohith via jianhe)
+
+    YARN-2181. Added preemption info to logs and RM web UI. (Wangda Tan via
+    jianhe)
+
+    YARN-1354. Recover applications upon nodemanager restart. (Jason Lowe via 
+    junping_du)
+
+    YARN-1337. Recover containers upon nodemanager restart. (Jason Lowe via 
+    junping_du)
+
+    YARN-2277. Added cross-origin support for the timeline server web services.
+    (Jonathan Eagles via zjshen)
+
+    YARN-2378. Added support for moving applications across queues in
+    CapacityScheduler. (Subramaniam Venkatraman Krishnan via jianhe)
+
+    YARN-2411. Support simple user and group mappings to queues. (Ram Venkatesh
+    via jianhe)
+
+    YARN-2174. Enable HTTPs for the writer REST API of TimelineServer.
+    (Zhijie Shen via jianhe)
+
+    YARN-2393. FairScheduler: Add the notion of steady fair share. 
+    (Wei Yan via kasha)
+
+    YARN-2395. FairScheduler: Preemption timeout should be configurable per 
+    queue. (Wei Yan via kasha)
+
+    YARN-2394. FairScheduler: Configure fairSharePreemptionThreshold per queue.
+    (Wei Yan via kasha)
+
+    YARN-415. Capture aggregate memory allocation at the app-level for chargeback.
+    (Eric Payne & Andrey Klochkov via jianhe)
+
+    YARN-2440. Enabled Nodemanagers to limit the aggregate cpu usage across all
+    containers to a preconfigured limit. (Varun Vasudev via vinodkv)
+
+    YARN-2033. Merging generic-history into the Timeline Store 
+    (Zhijie Shen via junping_du)
+
+    YARN-611. Added an API to let apps specify an interval beyond which AM
+    failures should be ignored towards counting max-attempts. (Xuan Gong via
+    vinodkv)
+
+    YARN-2531. Added a configuration for admins to be able to override app-configs
+    and enforce/not-enforce strict control of per-container cpu usage. (Varun
+    Vasudev via vinodkv)
+
+    YARN-1250. Generic history service should support application-acls. (Zhijie Shen
+    via junping_du)
+
+    YARN-2569. Added the log handling APIs for the long running services. (Xuan
+    Gong via zjshen)
+
+    YARN-2102. Added the concept of a Timeline Domain to handle read/write ACLs
+    on Timeline service event data. (Zhijie Shen via vinodkv)
+
+    YARN-2581. Passed LogAggregationContext to NM via ContainerTokenIdentifier.
+    (Xuan Gong via zjshen)
+
+    YARN-1063. Augmented Hadoop common winutils to have the ability to create
+    containers as domain users. (Remus Rusanu via vinodkv)
+
+    YARN-1972. Added a secure container-executor for Windows. (Remus Rusanu via
+    vinodkv)
+
+    YARN-2613. Support retry in NMClient for rolling-upgrades. (Jian He via 
+    junping_du)
+
+    YARN-2446. Augmented Timeline service APIs to start taking in domains as a
+    parameter while posting entities and events. (Zhijie Shen via vinodkv)
+
+    YARN-2468. Enhanced NodeManager to support log handling APIs (YARN-2569) for
+    use by long running services. (Xuan Gong via vinodkv)
+
+    YARN-1051. Add a system for creating reservations of cluster capacity.
+    (see breakdown below)
+
+    YARN-913. Add a way to register long-lived services in a YARN cluster.
+    (stevel)
+
+    YARN-2493. Added user-APIs for using node-labels. (Wangda Tan via vinodkv)
+
+    YARN-2544. Added admin-API objects for using node-labels. (Wangda Tan via
+    vinodkv)
+
+    YARN-2494. Added NodeLabels Manager internal API and implementation. (Wangda
+    Tan via vinodkv)
+
+    YARN-2501. Enhanced AMRMClient library to support requests against node
+    labels. (Wangda Tan via vinodkv)
+
+    YARN-2656. Made RM web services authentication filter support proxy user.
+    (Varun Vasudev and Zhijie Shen via zjshen)
+
+    YARN-2496. Enhanced Capacity Scheduler to have basic support for allocating
+    resources based on node-labels. (Wangda Tan via vinodkv)
+
+    YARN-2500. Enhaced ResourceManager to support schedulers allocating resources
+    based on node-labels. (Wangda Tan via vinodkv)
+
+    YARN-2504. Enhanced RM Admin CLI to support management of node-labels.
+    (Wangda Tan via vinodkv)
+
+    YARN-2198. Remove the need to run NodeManager as privileged account for
+    Windows Secure Container Executor. (Remus Rusanu via jianhe)
+
+    YARN-2647. Added a queue CLI for getting queue information. (Sunil Govind via
+    vinodkv)
+
+    YARN-2632. Document NM Restart feature. (Junping Du and Vinod Kumar
+    Vavilapalli via jlowe)
+
+    YARN-2505. Supported get/add/remove/change labels in RM REST API. (Craig Welch
+    via zjshen)
+
+    YARN-2811. In Fair Scheduler, reservation fulfillments shouldn't ignore max
+    share (Siqi Li via Sandy Ryza)
+
+    YARN-3445. Cache runningApps in RMNode for getting running apps on given
+    NodeId. (Junping Du via mingma)
+
+  IMPROVEMENTS
+
+    YARN-2197. Add a link to YARN CHANGES.txt in the left side of doc
+      (Akira AJISAKA via aw)
+
+    YARN-1918. Typo in description and error message for
+      'yarn.resourcemanager.cluster-id' (Anandha L Ranganathan via aw)
+
+    YARN-2242. Improve exception information on AM launch crashes. (Li Lu 
+    via junping_du)
+
+    YARN-2274. FairScheduler: Add debug information about cluster capacity, 
+    availability and reservations. (kasha)
+
+    YARN-2228. Augmented TimelineServer to load pseudo authentication filter when
+    authentication = simple. (Zhijie Shen via vinodkv)
+
+    YARN-1341. Recover NMTokens upon nodemanager restart. (Jason Lowe via 
+    junping_du)
+
+    YARN-2208. AMRMTokenManager need to have a way to roll over AMRMToken. (xgong)
+
+    YARN-2323. FairShareComparator creates too many Resource objects (Hong Zhiguo
+    via Sandy Ryza)
+
+    YARN-2045. Data persisted in NM should be versioned (Junping Du via jlowe)
+
+    YARN-2013. The diagnostics is always the ExitCodeException stack when the container 
+    crashes. (Tsuyoshi OZAWA via junping_du)
+
+    YARN-2295. Refactored DistributedShell to use public APIs of protocol records.
+    (Li Lu via jianhe)
+
+    YARN-1342. Recover container tokens upon nodemanager restart. (Jason Lowe via
+    devaraj)
+
+    YARN-2214. FairScheduler: preemptContainerPreCheck() in FSParentQueue delays 
+    convergence towards fairness. (Ashwin Shankar via kasha)
+
+    YARN-2211. Persist AMRMToken master key in RMStateStore for RM recovery.
+    (Xuan Gong via jianhe)
+
+    YARN-2328. FairScheduler: Verify update and continuous scheduling threads are
+    stopped when the scheduler is stopped. (kasha)
+
+    YARN-2347. Consolidated RMStateVersion and NMDBSchemaVersion into Version in
+    yarn-server-common. (Junping Du via zjshen)
+
+    YARN-1994. Expose YARN/MR endpoints on multiple interfaces. (Craig Welch,
+    Milan Potocnik, Arpit Agarwal via xgong)
+
+    YARN-2343. Improve NMToken expire exception message. (Li Lu via jianhe)
+
+    YARN-2370. Fix comment in o.a.h.y.server.resourcemanager.schedulerAppSchedulingInfo 
+    (Wenwu Peng via junping_du)
+
+    YARN-2298. Move TimelineClient to yarn-common project (Zhijie Shen via 
+    junping_du)
+
+    YARN-2288. Made persisted data in LevelDB timeline store be versioned. (Junping Du
+    via zjshen)
+
+    YARN-2352. FairScheduler: Collect metrics on duration of critical methods that 
+    affect performance. (kasha)
+
+    YARN-2212. ApplicationMaster needs to find a way to update the AMRMToken
+    periodically. (xgong)
+
+    YARN-2026. Fair scheduler: Consider only active queues for computing fairshare. 
+    (Ashwin Shankar via kasha)
+
+    YARN-1954. Added waitFor to AMRMClient(Async). (Tsuyoshi Ozawa via zjshen)
+
+    YARN-2302. Refactor TimelineWebServices. (Zhijie Shen via junping_du)
+
+    YARN-2337. ResourceManager sets ClientRMService in RMContext multiple times.
+    (Zhihai Xu via kasha)
+
+    YARN-2138. Cleaned up notifyDone* APIs in RMStateStore. (Varun Saxena via
+    jianhe)
+
+    YARN-2373. Changed WebAppUtils to use Configuration#getPassword for
+    accessing SSL passwords. (Larry McCay via jianhe)
+
+    YARN-2317. Updated the document about how to write YARN applications. (Li Lu via
+    zjshen)
+
+    YARN-2399. FairScheduler: Merge AppSchedulable and FSSchedulerApp into 
+    FSAppAttempt. (kasha)
+
+    YARN-1370. Fair scheduler to re-populate container allocation state. 
+    (Anubhav Dhoot via kasha)
+
+    YARN-2389. Added functionality for schedulers to kill all applications in a
+    queue. (Subramaniam Venkatraman Krishnan via jianhe)
+
+    YARN-1326. RM should log using RMStore at startup time. 
+    (Tsuyoshi Ozawa via kasha)
+
+    YARN-2182. Updated ContainerId#toString() to append RM Epoch number.
+    (Tsuyoshi OZAWA via jianhe)
+
+    YARN-2406. Move RM recovery related proto to
+    yarn_server_resourcemanager_recovery.proto. (Tsuyoshi Ozawa via jianhe)
+
+    YARN-1506. Changed RMNode/SchedulerNode to update resource with event
+    notification. (Junping Du via jianhe)
+
+    YARN-2509. Enable Cross Origin Filter for timeline server only and not all
+    Yarn servers (Mit Desai via jeagles)
+
+    YARN-2511. Allowed all origins by default when CrossOriginFilter is
+    enabled. (Jonathan Eagles via zjshen)
+
+    YARN-2508. Cross Origin configuration parameters prefix are not honored
+    (Mit Desai via jeagles)
+
+    YARN-2512. Allowed pattern matching for origins in CrossOriginFilter.
+    (Jonathan Eagles via zjshen)
+
+    YARN-2507. Documented CrossOriginFilter configurations for the timeline
+    server. (Jonathan Eagles via zjshen)
+
+    YARN-2515. Updated ConverterUtils#toContainerId to parse epoch.
+    (Tsuyoshi OZAWA via jianhe)
+
+    YARN-2448. Changed ApplicationMasterProtocol to expose RM-recognized resource
+    types to the AMs. (Varun Vasudev via vinodkv)
+
+    YARN-2538. Added logs when RM sends roll-overed AMRMToken to AM. (Xuan Gong
+    via zjshen)
+
+    YARN-2229. Changed the integer field of ContainerId to be long type.
+    (Tsuyoshi OZAWA via jianhe)
+
+    YARN-2547. Cross Origin Filter throws UnsupportedOperationException upon
+    destroy (Mit Desai via jeagles)
+
+    YARN-2557. Add a parameter "attempt_Failures_Validity_Interval" into
+    DistributedShell (xgong)
+
+    YARN-2001. Added a time threshold for RM to wait before starting container
+    allocations after restart/failover. (Jian He via vinodkv)
+
+    YARN-1372. Ensure all completed containers are reported to the AMs across
+    RM restart. (Anubhav Dhoot via jianhe)
+
+    YARN-2539. FairScheduler: Set the default value for maxAMShare to 0.5. 
+    (Wei Yan via kasha)
+
+    YARN-1959. Fix headroom calculation in FairScheduler. 
+    (Anubhav Dhoot via kasha)
+
+    YARN-2577. Clarify ACL delimiter and how to configure ACL groups only
+    (Miklos Christine via aw)
+
+    YARN-2372. There are Chinese Characters in the FairScheduler's document
+    (Fengdong Yu via aw)
+
+    YARN-668. Changed NMTokenIdentifier/AMRMTokenIdentifier/ContainerTokenIdentifier
+    to use protobuf object as the payload. (Junping Du via jianhe)
+
+    YARN-1769. CapacityScheduler: Improve reservations (Thomas Graves via
+    jlowe)
+
+    YARN-2627. Added the info logs of attemptFailuresValidityInterval and number
+    of previous failed attempts. (Xuan Gong via zjshen)
+
+    YARN-2562. Changed ContainerId#toString() to be more readable. (Tsuyoshi
+    OZAWA via jianhe)
+
+    YARN-2615. Changed ClientToAMTokenIdentifier/RM(Timeline)DelegationTokenIdentifier
+    to use protobuf as payload. (Junping Du via jianhe)
+
+    YARN-2629. Made the distributed shell use the domain-based timeline ACLs.
+    (zjshen)
+
+    YARN-2583. Modified AggregatedLogDeletionService to be able to delete rolling
+    aggregated logs. (Xuan Gong via zjshen)
+
+    YARN-2312. Deprecated old ContainerId#getId API and updated MapReduce to
+    use ContainerId#getContainerId instead. (Tsuyoshi OZAWA via jianhe)
+
+    YARN-2621. Simplify the output when the user doesn't have the access for
+    getDomain(s). (Zhijie Shen via jianhe)
+
+    YARN-1879. Marked Idempotent/AtMostOnce annotations to ApplicationMasterProtocol
+    for RM fail over. (Tsuyoshi OZAWA via jianhe)
+
+    YARN-2676. Enhanced Timeline auth-filter to support proxy users. (Zhijie Shen
+    via vinodkv)
+
+    YARN-2673. Made timeline client put APIs retry if ConnectException happens.
+    (Li Lu via zjshen)
+
+    YARN-2582. Fixed Log CLI and Web UI for showing aggregated logs of LRS. (Xuan
+    Gong via zjshen)
+
+    YARN-90. NodeManager should identify failed disks becoming good again
+    (Varun Vasudev via jlowe)
+
+    YARN-2709. Made timeline client getDelegationToken API retry if ConnectException
+    happens. (Li Lu via zjshen)
+
+    YARN-2682. Updated WindowsSecureContainerExecutor to not use
+    DefaultContainerExecutor#getFirstApplicationDir and use getWorkingDir()
+    instead. (Zhihai Xu via jianhe)
+
+    YARN-2209. Replaced AM resync/shutdown command with corresponding exceptions and
+    made related MR changes. (Jian He via zjshen)
+
+    YARN-2703. Added logUploadedTime into LogValue for better display. (Xuan Gong
+    via zjshen)
+
+    YARN-2704. Changed ResourceManager to optionally obtain tokens itself for the
+    sake of localization and log-aggregation for long-running services. (Jian He
+    via vinodkv)
+
+    YARN-2502. Changed DistributedShell to support node labels. (Wangda Tan via
+    jianhe)
+
+    YARN-2760. Remove 'experimental' from FairScheduler docs. (Harsh J via kasha)
+
+    YARN-2503. Added node lablels in web UI. (Wangda Tan via jianhe)
+
+    YARN-2779. Fixed ResourceManager to not require delegation tokens for 
+    communicating with Timeline Service. (Zhijie Shen via vinodkv)
+
+    YARN-2778. Moved node-lables' reports to the yarn nodes CLI from the admin
+    CLI. (Wangda Tan via vinodkv)
+
+    YARN-2770. Added functionality to renew/cancel TimeLineDelegationToken.
+    (Zhijie Shen via jianhe)
+
+    YARN-2818. Removed the now unnecessary user entity injection from Timeline
+    service given we now have domains. (Zhijie Shen via vinodkv)
+
+    YARN-2635. TestRM, TestRMRestart, TestClientToAMTokens should run 
+    with both CS and FS. (Wei Yan and kasha via kasha)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-2251. Avoid negative elapsed time in JHS/MRAM web UI and services.
+    (Zhijie Shen via junping_du)
+
+    YARN-2088. Fixed a bug in GetApplicationsRequestPBImpl#mergeLocalToBuilder.
+    (Binglin Chang via jianhe)
+
+    YARN-2260. Fixed ResourceManager's RMNode to correctly remember containers
+    when nodes resync during work-preserving RM restart. (Jian He via vinodkv)
+
+    YARN-2264. Fixed a race condition in DrainDispatcher which may cause random
+    test failures. (Li Lu via jianhe)
+
+    YARN-2219. Changed ResourceManager to avoid AMs and NMs getting exceptions
+    after RM recovery but before scheduler learns about apps and app-attempts.
+    (Jian He via vinodkv)
+
+    YARN-2244. FairScheduler missing handling of containers for unknown 
+    application attempts. (Anubhav Dhoot via kasha)
+
+    YARN-2321. NodeManager web UI can incorrectly report Pmem enforcement
+    (Leitao Guo via jlowe)
+
+    YARN-2273. NPE in ContinuousScheduling thread when we lose a node. 
+    (Wei Yan via kasha)
+
+    YARN-2313. Livelock can occur in FairScheduler when there are lots of
+    running apps (Tsuyoshi Ozawa via Sandy Ryza)
+
+    YARN-2147. client lacks delegation token exception details when
+    application submit fails (Chen He via jlowe)
+
+    YARN-1796. container-executor shouldn't require o-r permissions (atm)
+
+    YARN-2354. DistributedShell may allocate more containers than client
+    specified after AM restarts. (Li Lu via jianhe)
+
+    YARN-2051. Fix bug in PBimpls and add more unit tests with reflection. 
+    (Binglin Chang via junping_du)
+
+    YARN-2374. Fixed TestDistributedShell#testDSShell failure due to hostname
+    dismatch. (Varun Vasudev via jianhe)
+
+    YARN-2359. Application hangs when it fails to launch AM container. 
+    (Zhihai Xu via kasha)
+
+    YARN-2388. Fixed TestTimelineWebServices failure due to HADOOP-10791. (zjshen)
+
+    YARN-2008. Fixed CapacityScheduler to calculate headroom based on max available
+    capacity instead of configured max capacity. (Craig Welch via jianhe)
+
+    YARN-2400. Fixed TestAMRestart fails intermittently. (Jian He via xgong)
+
+    YARN-2361. RMAppAttempt state machine entries for KILLED state has duplicate
+    event entries. (Zhihai Xu via kasha)
+
+    YARN-2070. Made DistributedShell publish the short user name to the timeline
+    server. (Robert Kanter via zjshen)
+
+    YARN-2397. Avoided loading two authentication filters for RM and TS web
+    interfaces. (Varun Vasudev via zjshen)
+
+    YARN-2409. RM ActiveToStandBy transition missing stoping previous rmDispatcher.
+    (Rohith via jianhe)
+
+    YARN-2249. Avoided AM release requests being lost on work preserving RM
+    restart. (Jian He via zjshen)
+
+    YARN-2034. Description for yarn.nodemanager.localizer.cache.target-size-mb
+    is incorrect (Chen He via jlowe)
+
+    YARN-1919. Potential NPE in EmbeddedElectorService#stop. 
+    (Tsuyoshi Ozawa via kasha)
+
+    YARN-2424. LCE should support non-cgroups, non-secure mode (Chris Douglas 
+    via aw)
+
+    YARN-2434. RM should not recover containers from previously failed attempt
+    when AM restart is not enabled (Jian He via jlowe)
+
+    YARN-2035. FileSystemApplicationHistoryStore should not make working dir
+    when it already exists. (Jonathan Eagles via zjshen)
+
+    YARN-2405. NPE in FairSchedulerAppsBlock. (Tsuyoshi Ozawa via kasha)
+
+    YARN-2449. Fixed the bug that TimelineAuthenticationFilterInitializer
+    is not automatically added when hadoop.http.filter.initializers is not
+    configured. (Varun Vasudev via zjshen)
+
+    YARN-2450. Fix typos in log messages. (Ray Chiang via hitesh)
+
+    YARN-2447. RM web service app submission doesn't pass secrets correctly.
+    (Varun Vasudev via jianhe)
+
+    YARN-2462. TestNodeManagerResync#testBlockNewContainerRequestsOnStartAndResync
+    should have a test timeout (Eric Payne via jlowe)
+
+    YARN-2431. NM restart: cgroup is not removed for reacquired containers
+    (jlowe)
+
+    YARN-2519. Credential Provider related unit tests failed on Windows.
+    (Xiaoyu Yao via cnauroth)
+
+    YARN-2526. SLS can deadlock when all the threads are taken by AMSimulators. 
+    (Wei Yan via kasha)
+
+    YARN-1458. FairScheduler: Zero weight can lead to livelock. 
+    (Zhihai Xu via kasha)
+
+    YARN-2459. RM crashes if App gets rejected for any reason 
+    and HA is enabled. (Jian He and Mayank Bansal via xgong)
+
+    YARN-2158. Fixed TestRMWebServicesAppsModification#testSingleAppKill test
+    failure. (Varun Vasudev via jianhe)
+
+    YARN-2534. FairScheduler: Potential integer overflow calculating totalMaxShare. 
+    (Zhihai Xu via kasha)
+
+    YARN-2541. Fixed ResourceManagerRest.apt.vm table syntax error. (jianhe)
+
+    YARN-2484. FileSystemRMStateStore#readFile/writeFile should close
+    FSData(In|Out)putStream in final block (Tsuyoshi OZAWA via jlowe)
+
+    YARN-2456. Possible livelock in CapacityScheduler when RM is recovering apps.
+    (Jian He via xgong)
+
+    YARN-2542. Fixed NPE when retrieving ApplicationReport from TimeLineServer.
+    (Zhijie Shen via jianhe)
+
+    YARN-2528. Relaxed http response split vulnerability protection for the origins
+    header and made it accept multiple origins in CrossOriginFilter. (Jonathan
+    Eagles via zjshen)
+
+    YARN-2549. TestContainerLaunch fails due to classpath problem with hamcrest
+    classes. (cnauroth)
+
+    YARN-2529. Generic history service RPC interface doesn't work when service
+    authorization is enabled. (Zhijie Shen via jianhe)
+
+    YARN-2558. Updated ContainerTokenIdentifier#read/write to use
+    ContainerId#getContainerId. (Tsuyoshi OZAWA via jianhe)
+
+    YARN-2559. Fixed NPE in SystemMetricsPublisher when retrieving
+    FinalApplicationStatus. (Zhijie Shen via jianhe)
+
+    YARN-1779. Fixed AMRMClient to handle AMRMTokens correctly across
+    ResourceManager work-preserving-restart or failover. (Jian He via vinodkv)
+
+    YARN-2363. Submitted applications occasionally lack a tracking URL (jlowe)
+
+    YARN-2561. MR job client cannot reconnect to AM after NM restart. (Junping
+    Du via jlowe)
+
+    YARN-2563. Fixed YarnClient to call getTimeLineDelegationToken only if the
+    Token is not present. (Zhijie Shen via jianhe)
+
+    YARN-2568. Fixed the potential test failures due to race conditions when RM
+    work-preserving recovery is enabled. (Jian He via zjshen)
+
+    YARN-2565. Fixed RM to not use FileSystemApplicationHistoryStore unless
+    explicitly set. (Zhijie Shen via jianhe)
+
+    YARN-2460. Remove obsolete entries from yarn-default.xml (Ray Chiang via
+    aw)
+
+    YARN-2452. TestRMApplicationHistoryWriter fails with FairScheduler. 
+    (Zhihai Xu via kasha)
+
+    YARN-2453. TestProportionalCapacityPreemptionPolicy fails with 
+    FairScheduler. (Zhihai Xu via kasha)
+    
+    YARN-2540. FairScheduler: Queue filters not working on scheduler page in 
+    RM UI. (Ashwin Shankar via kasha)
+
+    YARN-2584. TestContainerManagerSecurity fails on trunk. (Jian He via 
+    junping_du)
+
+    YARN-2252. Intermittent failure of 
+    TestFairScheduler.testContinuousScheduling. 
+    (Ratandeep Ratti and kasha via kasha)
+
+    YARN-2161. Fix build on macosx: YARN parts (Binglin Chang via aw)
+
+    YARN-2596. TestWorkPreservingRMRestart fails with FairScheduler. (kasha)
+
+    YARN-2546. Made REST API for application creation/submission use numeric and
+    boolean types instead of the string of them. (Varun Vasudev via zjshen)
+
+    YARN-2523. ResourceManager UI showing negative value for "Decommissioned
+    Nodes" field (Rohith via jlowe)
+
+    YARN-2608. FairScheduler: Potential deadlocks in loading alloc files and 
+    clock access. (Wei Yan via kasha)
+
+    YARN-2606. Application History Server tries to access hdfs before doing
+    secure login (Mit Desai via jeagles)
+
+    YARN-2610. Hamlet should close table tags. (Ray Chiang via kasha)
+
+    YARN-2387. Resource Manager crashes with NPE due to lack of
+    synchronization (Mit Desai via jlowe)
+
+    YARN-2594. Potential deadlock in RM when querying 
+    ApplicationResourceUsageReport. (Wangda Tan via kasha)
+
+    YARN-2602. Fixed possible NPE in ApplicationHistoryManagerOnTimelineStore.
+    (Zhijie Shen via jianhe)
+
+    YARN-2630. Prevented previous AM container status from being acquired by the
+    current restarted AM. (Jian He via zjshen) 
+
+    YARN-2617. Fixed NM to not send duplicate container status whose app is not
+    running. (Jun Gong via jianhe)
+
+    YARN-2624. Resource Localization fails on a cluster due to existing cache
+    directories (Anubhav Dhoot via jlowe)
+
+    YARN-2527. Fixed the potential NPE in ApplicationACLsManager and added test
+    cases for it. (Benoy Antony via zjshen)
+
+    YARN-2628. Capacity scheduler with DominantResourceCalculator carries out
+    reservation even though slots are free. (Varun Vasudev via jianhe)
+
+    YARN-2685. Fixed a bug in CommonNodeLabelsManager that caused wrong resource
+    tracking per label when a host runs multiple node-managers. (Wangda Tan via
+    vinodkv)
+
+    YARN-2699. Fixed a bug in CommonNodeLabelsManager that caused tests to fail
+    when using ephemeral ports on NodeIDs. (Wangda Tan via vinodkv)
+
+    YARN-2705. Fixed bugs in ResourceManager node-label manager that were causing
+    test-failures: added a dummy in-memory labels-manager. (Wangda Tan via
+    vinodkv)
+
+    YARN-2715. Fixed ResourceManager to respect common configurations for proxy
+    users/groups beyond just the YARN level config. (Zhijie Shen via vinodkv)
+
+    YARN-2743. Fixed a bug in ResourceManager that was causing RMDelegationToken
+    identifiers to be tampered and thus causing app submission failures in
+    secure mode. (Jian He via vinodkv)
+
+  BREAKDOWN OF YARN-1051 SUBTASKS AND RELATED JIRAS
+
+    YARN-1707. Introduce APIs to add/remove/resize queues in the
+    CapacityScheduler. (Carlo Curino and Subru Krishnan via curino)
+
+    YARN-2475. Logic for responding to capacity drops for the
+    ReservationSystem. (Carlo Curino and Subru Krishnan via curino)
+
+    YARN-1708. Public YARN APIs for creating/updating/deleting
+    reservations. (Subru Krishnan and Carlo Curino via subru)
+
+    YARN-1709. In-memory data structures used to track resources over
+    time to enable reservations. (Subru Krishnan and Carlo Curino via
+    subru)
+
+    YARN-1710. Logic to find allocations within a Plan that satisfy
+    user ReservationRequest(s). (Carlo Curino and Subru Krishnan via
+    curino)
+
+    YARN-1711. Policy to enforce instantaneous and over-time quotas
+    on user reservations. (Carlo Curino and Subru Krishnan via curino)
+
+    YARN-1712. Plan follower that synchronizes the current state of reservation
+    subsystem with the scheduler. (Subru Krishnan and Carlo Curino via subru)
+
+    YARN-2080. Integrating reservation system with ResourceManager and
+    client-RM protocol. (Subru Krishnan and Carlo Curino via subru)
+
+    MAPREDUCE-6103. Adding reservation APIs to MR resource manager
+    delegate. (Subru Krishnan and Carlo Curino via subru)
+
+    YARN-2576. Fixing compilation, javadocs and audit issues to pass
+    test patch in branch. (Subru Krishnan and Carlo Curino via subru)
+
+    YARN-2611. Fixing jenkins findbugs warning and TestRMWebServicesCapacitySched
+    for branch YARN-1051. (Subru Krishnan and Carlo Curino via subru)
+
+    YARN-2644. Fixed CapacityScheduler to return up-to-date headroom when
+    AM allocates. (Craig Welch via jianhe)
+
+    YARN-1857. CapacityScheduler headroom doesn't account for other AM's running.
+    (Chen He and Craig Welch via jianhe)
+
+    YARN-2649. Fixed TestAMRMRPCNodeUpdates test failure. (Ming Ma via jianhe)
+
+    YARN-2662. TestCgroupsLCEResourcesHandler leaks file descriptors. (cnauroth)
+
+  BREAKDOWN OF YARN-913 SUBTASKS AND RELATED JIRAS
+
+    YARN-2652 Add hadoop-yarn-registry package under hadoop-yarn. (stevel)
+
+    YARN-2668 yarn-registry JAR won't link against ZK 3.4.5. (stevel)
+    
+    YARN-2689 TestSecureRMRegistryOperations failing on windows:
+    secure ZK won't start (stevel)
+
+    YARN-2692 ktutil test hanging on some machines/ktutil versions (stevel)
+
+    YARN-2700 TestSecureRMRegistryOperations failing on windows: auth problems
+    (stevel)
+
+    YARN-2677 registry punycoding of usernames doesn't fix all usernames to be
+    DNS-valid (stevel)
+
+    YARN-2768 Improved Yarn Registry service record structure (stevel)
+
+    ---
+
+    YARN-2598 GHS should show N/A instead of null for the inaccessible information
+    (Zhijie Shen via mayank)
+
+    YARN-2671. Fixed ApplicationSubmissionContext to still set resource for
+    backward compatibility. (Wangda Tan via zjshen)
+
+    YARN-2667. Fix the release audit warning caused by hadoop-yarn-registry
+    (Yi Liu via jlowe)
+
+    YARN-2651. Spun off LogRollingInterval from LogAggregationContext. (Xuan Gong
+    via zjshen)
+
+    YARN-2377. Localization exception stack traces are not passed as
+    diagnostic info (Gera Shegalov via jlowe)
+
+    YARN-2308. Changed CapacityScheduler to explicitly throw exception if the
+    queue to which the apps were submitted is changed across RM restart.
+    (Craig Welch & Chang Li via jianhe)
+
+    YARN-2566. DefaultContainerExecutor should pick a working directory randomly. 
+    (Zhihai Xu via kasha)
+
+    YARN-2588. Standby RM fails to transitionToActive if previous
+    transitionToActive failed with ZK exception. (Rohith Sharmaks via jianhe)
+
+    YARN-2701. Potential race condition in startLocalizer when using
+    LinuxContainerExecutor. (Xuan Gong via jianhe)
+
+    YARN-2717. Avoided duplicate logging when container logs are not found. (Xuan
+    Gong via zjshen)
+
+    YARN-2720. Windows: Wildcard classpath variables not expanded against
+    resources contained in archives. (Craig Welch via cnauroth)
+
+    YARN-2721. Suppress NodeExist exception thrown by ZKRMStateStore when it
+    retries creating znode. (Jian He via zjshen)
+
+    YARN-2732. Fixed syntax error in SecureContainer.apt.vm. (Jian He via zjshen)
+
+    YARN-2724. Skipped uploading a local log file to HDFS if exception is raised
+    when opening it. (Xuan Gong via zjshen)
+
+    YARN-1915. Fixed a race condition that client could use the ClientToAMToken
+    to contact with AM before AM actually receives the ClientToAMTokenMasterKey.
+    (Jason Lowe via jianhe)
+
+    YARN-2314. Disable ContainerManagementProtocolProxy cache by default to
+    prevent creating thousands of threads in a large cluster. (Jason Lowe via
+    jianhe)
+
+    YARN-2723. Fix rmadmin -replaceLabelsOnNode does not correctly parse port.
+    (Naganarasimha G R via xgong)
+
+    YARN-2734. Skipped sub-folders in the local log dir when aggregating logs.
+    (Xuan Gong via zjshen)
+
+    YARN-2726. CapacityScheduler should explicitly log when an accessible
+    label has no capacity. (Wangda Tan via xgong)
+
+    YARN-2591. Fixed AHSWebServices to return FORBIDDEN(403) if the request user
+    doesn't have access to the history data. (Zhijie Shen via jianhe)
+
+    YARN-2279. Add UTs to cover timeline server authentication.
+    (Zhijie Shen via xgong)
+
+    YARN-2758. Update TestApplicationHistoryClientService to use the new generic
+    history store. (Zhijie Shen via xgong)
+
+    YARN-2741. Made NM web UI serve logs on the drive other than C: on Windows. (Craig
+    Welch via zjshen)
+
+    YARN-2747. Fixed the test failure of TestAggregatedLogFormat when native I/O is
+    enabled. (Xuan Gong via zjshen)
+
+    YARN-2769. Fixed the problem that timeline domain is not set in distributed shell
+    AM when using shell_command on Windows. (Varun Vasudev via zjshen)
+
+    YARN-2755. NM fails to clean up usercache_DEL_<timestamp> dirs after
+    YARN-661 (Siqi Li via jlowe)
+
+    YARN-2698. Moved some node label APIs to be correctly placed in client
+    protocol. (Wangda Tan via vinodkv)
+
+    YARN-2789. Re-instated the NodeReport.newInstance private unstable API
+    modified in YARN-2698 so that tests in YARN frameworks don't break. (Wangda
+    Tan via vinodkv)
+
+    YARN-2707. Potential null dereference in FSDownload (Gera Shegalov via
+    jlowe)
+
+    YARN-2711. Fixed TestDefaultContainerExecutor#testContainerLaunchError failure on
+    Windows. (Varun Vasudev via zjshen)
+
+    YARN-2790. Fixed a NodeManager bug that was causing log-aggregation to fail
+    beyond HFDS delegation-token expiry even when RM is a proxy-user (YARN-2704).
+    (Jian He via vinodkv)
+
+    YARN-2785. Fixed intermittent TestContainerResourceUsage failure. (Varun Vasudev
+    via zjshen)
+
+    YARN-2730. DefaultContainerExecutor runs only one localizer at a time
+    (Siqi Li via jlowe)
+
+    YARN-2798. Fixed YarnClient to populate the renewer correctly for Timeline
+    delegation tokens. (Zhijie Shen via vinodkv)
+
+    YARN-2788. Fixed backwards compatiblity issues with log-aggregation feature
+    that were caused when adding log-upload-time via YARN-2703. (Xuan Gong via
+    vinodkv)
+
+    YARN-2795. Fixed ResourceManager to not crash loading node-label data from
+    HDFS in secure mode. (Wangda Tan via vinodkv)
+
+    YARN-1922. Fixed NodeManager to kill process-trees correctly in the presence 
+    of races between the launch and the stop-container call and when root
+    processes crash. (Billie Rinaldi via vinodkv)
+
+    YARN-2010. Handle app-recovery failures gracefully. 
+    (Jian He and Karthik Kambatla via kasha)
+
+    YARN-2804. Fixed Timeline service to not fill the logs with JAXB bindings
+    exceptions. (Zhijie Shen via vinodkv)
+
+    YARN-2767. Added a test case to verify that http static user cannot kill or submit
+    apps in the secure mode. (Varun Vasudev via zjshen)
+
+    YARN-2805. Fixed ResourceManager to load HA configs correctly before kerberos
+    login. (Wangda Tan via vinodkv)
+
+    YARN-2579. Fixed a deadlock issue when EmbeddedElectorService and
+    FatalEventDispatcher try to transition RM to StandBy at the same time.
+    (Rohith Sharmaks via jianhe)
+
+    YARN-2813. Fixed NPE from MemoryTimelineStore.getDomains. (Zhijie Shen via xgong)
+
+    YARN-2812. TestApplicationHistoryServer is likely to fail on less powerful machine.
+    (Zhijie Shen via xgong)
+
+    YARN-2744. Fixed CapacityScheduler to validate node-labels correctly against
+    queues. (Wangda Tan via vinodkv)
+
+    YARN-2823. Fixed ResourceManager app-attempt state machine to inform
+    schedulers about previous finished attempts of a running appliation to avoid
+    expectation mismatch w.r.t transferred containers. (Jian He via vinodkv)
+
+    YARN-2810. TestRMProxyUsersConf fails on Windows VMs. (Varun Vasudev via xgong)
+
+    YARN-2824. Fixed Capacity Scheduler to not crash when some node-labels are
+    not mapped to queues by making default capacities per label to be zero.
+    (Wangda Tan via vinodkv)
+
+    YARN-2827. Fixed bugs in "yarn queue" CLI. (Wangda Tan via vinodkv)
+
+    YARN-2803. MR distributed cache not working correctly on Windows after
+    NodeManager privileged account changes. (Craig Welch via cnauroth)
+
+    YARN-2753. Fixed a bunch of bugs in the NodeLabelsManager classes. (Zhihai xu
+    via vinodkv)
+
+    YARN-2825. Container leak on NM (Jian He via jlowe)
+
+    YARN-2819. NPE in ATS Timeline Domains when upgrading from 2.4 to 2.6.
+    (Zhijie Shen via xgong)
+
+    YARN-2826. Fixed user-groups mappings' refresh bug caused by YARN-2826.
+    (Wangda Tan via vinodkv)
+
+    YARN-2607. Fixed issues in TestDistributedShell. (Wangda Tan via vinodkv)
+
+    YARN-2830. Add backwords compatible ContainerId.newInstance constructor.
+    (jeagles via acmurthy) 
+
+    YARN-2834. Fixed ResourceManager to ignore token-renewal failures on recovery
+    consistent with the (somewhat incorrect) behaviour in the non-recovery case.
+    (Jian He via vinodkv)
+
+    YARN-2841. RMProxy should retry EOFException. (Jian He via xgong)
+
+    YARN-2843. Fixed NodeLabelsManager to trim inputs for hosts and labels so
+    as to make them work correctly. (Wangda Tan via vinodkv)
+
+    YARN-2794. Fixed log messages about distributing system-credentials. (Jian He via
+    zjshen)
+
+    YARN-2846. Incorrect persist exit code for running containers in
+    reacquireContainer() that interrupted by NodeManager restart. (Junping Du
+    via jlowe)
+
+    YARN-2853. Fixed a bug in ResourceManager causing apps to hang when the user
+    kill request races with ApplicationMaster finish. (Jian He via vinodkv)
+
+Release 2.5.2 - 2014-11-19
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+
+Release 2.5.1 - 2014-09-05
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 2.5.0 - 2014-08-11
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-1757. NM Recovery. Auxiliary service support. (Jason Lowe via kasha)
+
+    YARN-1864. Fair Scheduler Dynamic Hierarchical User Queues (Ashwin Shankar
+    via Sandy Ryza)
+
+    YARN-1362. Distinguish between nodemanager shutdown for decommission vs shutdown 
+    for restart. (Jason Lowe via junping_du)
+
+    YARN-1338. Recover localized resource cache state upon nodemanager restart 
+    (Jason Lowe via junping_du)
+
+    YARN-1368. Added core functionality of recovering container state into
+    schedulers after ResourceManager Restart so as to preserve running work in
+    the cluster. (Jian He via vinodkv)
+
+    YARN-1702. Added kill app functionality to RM web services. (Varun Vasudev
+    via vinodkv)
+
+    YARN-1339. Recover DeletionService state upon nodemanager restart. (Jason Lowe
+    via junping_du)
+
+    YARN-1365. Changed ApplicationMasterService to allow an app to re-register
+    after RM restart. (Anubhav Dhoot via jianhe)
+
+    YARN-2052. Embedded an epoch number in container id to ensure the uniqueness
+    of container id after RM restarts. (Tsuyoshi OZAWA via jianhe)
+
+    YARN-1713. Added get-new-app and submit-app functionality to RM web services.
+    (Varun Vasudev via vinodkv)
+
+    YARN-2233. Implemented ResourceManager web-services to create, renew and
+    cancel delegation tokens. (Varun Vasudev via vinodkv)
+
+    YARN-2247. Made RM web services authenticate users via kerberos and delegation
+    token. (Varun Vasudev via zjshen)
+
+  IMPROVEMENTS
+
+    YARN-1479. Invalid NaN values in Hadoop REST API JSON response (Chen He via
+    jeagles)
+
+    YARN-1736. FS: AppSchedulable.assignContainer's priority argument is 
+    redundant. (Naren Koneru via kasha)
+
+    YARN-1678. Fair scheduler gabs incessantly about reservations (Sandy Ryza)
+
+    YARN-1561. Fix a generic type warning in FairScheduler. (Chen He via junping_du)
+
+    YARN-1429. *nix: Allow a way for users to augment classpath of YARN daemons.
+    (Jarek Jarcec Cecho via kasha)
+
+    YARN-1520. update capacity scheduler docs to include necessary parameters
+    (Chen He via jeagles)
+
+    YARN-1845. Elapsed time for failed tasks that never started is wrong
+    (Rushabh S Shah via jeagles)
+
+    YARN-1136. Replace junit.framework.Assert with org.junit.Assert (Chen He
+    via jeagles)
+
+    YARN-1889. In Fair Scheduler, avoid creating objects on each call to
+    AppSchedulable comparator (Hong Zhiguo via Sandy Ryza)
+
+    YARN-1923. Make Fair Scheduler resource ratio calculations terminate faster
+    (Anubhav Dhoot via Sandy Ryza)
+
+    YARN-1870. FileInputStream is not closed in ProcfsBasedProcessTree#constructProcessSMAPInfo. 
+    (Fengdong Yu via junping_du)
+
+    YARN-1970. Prepare YARN codebase for JUnit 4.11. (cnauroth)
+
+    YARN-483. Improve documentation on log aggregation in yarn-default.xml
+    (Akira Ajisaka via Sandy Ryza)
+
+    YARN-2036. Document yarn.resourcemanager.hostname in ClusterSetup (Ray
+    Chiang via Sandy Ryza)
+
+    YARN-766. TestNodeManagerShutdown in branch-2 should use Shell to form the output path and a format 
+    issue in trunk. (Contributed by Siddharth Seth)
+
+    YARN-1982. Renamed the daemon name to be TimelineServer instead of History
+    Server and deprecated the old usage. (Zhijie Shen via vinodkv)
+
+    YARN-1987. Wrapper for leveldb DBIterator to aid in handling database exceptions.
+    (Jason Lowe via kasha)
+
+    YARN-1751. Improve MiniYarnCluster for log aggregation testing (Ming Ma
+    via jlowe)
+
+    YARN-1981. Nodemanager version is not updated when a node reconnects (Jason
+    Lowe via jeagles)
+
+    YARN-1938. Added kerberos login for the Timeline Server. (Zhijie Shen via
+    vinodkv)
+
+    YARN-2017. Merged some of the common scheduler code. (Jian He via vinodkv)
+
+    YARN-2049. Added delegation-token support for the Timeline Server. (Zhijie
+    Shen via vinodkv)
+
+    YARN-1936. Added security support for the Timeline Client. (Zhijie Shen via
+    vinodkv)
+
+    YARN-1937. Added owner-only ACLs support for Timeline Client and server.
+    (Zhijie Shen via vinodkv)
+
+    YARN-2012. Fair Scheduler: allow default queue placement rule to take an
+    arbitrary queue (Ashwin Shankar via Sandy Ryza)
+
+    YARN-2059. Added admin ACLs support to Timeline Server. (Zhijie Shen via
+    vinodkv)
+    
+    YARN-2073. Fair Scheduler: Add a utilization threshold to prevent preempting
+    resources when cluster is free (Karthik Kambatla via Sandy Ryza)
+
+    YARN-2071. Modified levelDB store permissions to be readable only by the
+    server user. (Zhijie Shen via vinodkv)
+
+    YARN-2107. Refactored timeline classes into o.a.h.y.s.timeline package. (Vinod
+    Kumar Vavilapalli via zjshen)
+
+    YARN-596. Use scheduling policies throughout the queue hierarchy to decide
+    which containers to preempt (Wei Yan via Sandy Ryza)
+
+    YARN-2054. Better defaults for YARN ZK configs for retries and retry-inteval 
+    when HA is enabled. (kasha)
+
+    YARN-1877. Document yarn.resourcemanager.zk-auth and its scope. 
+    (Robert Kanter via kasha)
+
+    YARN-2115. Replaced RegisterNodeManagerRequest's ContainerStatus with a new
+    NMContainerStatus which has more information that is needed for
+    work-preserving RM-restart. (Jian He via vinodkv)
+
+    YARN-1474. Make schedulers services. (Tsuyoshi Ozawa via kasha)
+
+    YARN-1913. With Fair Scheduler, cluster can logjam when all resources are
+    consumed by AMs (Wei Yan via Sandy Ryza)
+
+    YARN-2061. Revisit logging levels in ZKRMStateStore. (Ray Chiang via kasha)
+
+    YARN-1977. Add tests on getApplicationRequest with filtering start time range. (junping_du)
+
+    YARN-2122. In AllocationFileLoaderService, the reloadThread should be created
+    in init() and started in start(). (Robert Kanter via kasha)
+
+    YARN-2132. ZKRMStateStore.ZKAction#runWithRetries doesn't log the exception
+    it encounters. (Vamsee Yarlagadda via kasha)
+
+    YARN-2030. Augmented RMStateStore with state machine.(Binglin Chang via jianhe)
+
+    YARN-1424. RMAppAttemptImpl should return the 
+    DummyApplicationResourceUsageReport for all invalid accesses. 
+    (Ray Chiang via kasha)
+
+    YARN-2091. Add more values to ContainerExitStatus and pass it from NM to
+    RM and then to app masters (Tsuyoshi OZAWA via bikas)
+
+    YARN-2125. Changed ProportionalCapacityPreemptionPolicy to log CSV in debug
+    level. (Wangda Tan via jianhe)
+
+    YARN-2159. Better logging in SchedulerNode#allocateContainer.
+    (Ray Chiang via kasha)
+
+    YARN-2191. Added a new test to ensure NM will clean up completed applications
+    in the case of RM restart. (Wangda Tan via jianhe)
+
+    YARN-2195. Clean a piece of code in ResourceRequest. (Wei Yan via devaraj)
+
+    YARN-2074. Changed ResourceManager to not count AM preemptions towards app
+    failures. (Jian He via vinodkv)
+
+    YARN-2192. TestRMHA fails when run with a mix of Schedulers.
+    (Anubhav Dhoot via kasha)
+
+    YARN-2109. Fix TestRM to work with both schedulers. (Anubhav Dhoot via kasha)
+
+    YARN-2072. RM/NM UIs and webservices are missing vcore information.
+    (Nathan Roberts via tgraves)
+
+    YARN-2152. Added missing information into ContainerTokenIdentifier so that
+    NodeManagers can report the same to RM when RM restarts. (Jian He via vinodkv)
+
+    YARN-2171. Improved CapacityScheduling to not lock on nodemanager-count when
+    AMs heartbeat in. (Jason Lowe via vinodkv)
+
+    YARN-614. Changed ResourceManager to not count disk failure, node loss and
+    RM restart towards app failures. (Xuan Gong via jianhe)
+
+    YARN-2224. Explicitly enable vmem check in
+    TestContainersMonitor#testContainerKillOnMemoryOverflow.
+    (Anubhav Dhoot via kasha)
+
+    YARN-2022. Preempting an Application Master container can be kept as least priority
+    when multiple applications are marked for preemption by 
+    ProportionalCapacityPreemptionPolicy (Sunil G via mayank)
+
+    YARN-2241. ZKRMStateStore: On startup, show nicer messages if znodes already 
+    exist. (Robert Kanter via kasha)
+
+	YARN-1408 Preemption caused Invalid State Event: ACQUIRED at KILLED and 
+	caused a task timeout for 30mins. (Sunil G via mayank)
+
+    YARN-2300. Improved the documentation of the sample requests for RM REST API -
+    submitting an app. (Varun Vasudev via zjshen)
+
+  OPTIMIZATIONS
+
+  BUG FIXES 
+
+    YARN-1718. Fix a couple isTerminals in Fair Scheduler queue placement rules
+    (Sandy Ryza)
+
+    YARN-1790. Fair Scheduler UI not showing apps table (bc Wong via Sandy Ryza)
+
+    YARN-1784. TestContainerAllocation assumes CapacityScheduler.
+    (Robert Kanter via kasha)
+
+    YARN-1940. deleteAsUser() terminates early without deleting more files on
+    error (Rushabh S Shah via jlowe)
+
+    YARN-1865. ShellScriptBuilder does not check for some error conditions.
+    (Remus Rusanu via ivanmi)
+
+    YARN-738. TestClientRMTokens is failing irregularly while running all yarn
+    tests (Ming Ma via jlowe)
+
+    YARN-2018. TestClientRMService.testTokenRenewalWrongUser fails after
+    HADOOP-10562 (Ming Ma via Arpit Agarwal)
+
+    YARN-2011. Fix typo and warning in TestLeafQueue (Chen He via junping_du)
+
+
+    YARN-2042. String shouldn't be compared using == in
+    QueuePlacementRule#NestedUserQueue#getQueueForApp (Chen He via Sandy Ryza)
+
+    YARN-2050. Fix LogCLIHelpers to create the correct FileContext (Ming Ma
+    via jlowe)
+
+    YARN-2089. FairScheduler: QueuePlacementPolicy and QueuePlacementRule 
+    are missing audience annotations. (Zhihai Xu via kasha)
+
+    YARN-2096. Race in TestRMRestart#testQueueMetricsOnRMRestart.
+    (Anubhav Dhoot via kasha)
+
+    YARN-2105. Fix TestFairScheduler after YARN-2012. (Ashwin Shankar via
+    Sandy Ryza)
+
+    YARN-2112. Fixed yarn-common's pom.xml to include jackson dependencies so
+    that both Timeline Server and client can access them. (Zhijie Shen via
+    vinodkv)
+
+    YARN-1868. YARN status web ui does not show correctly in IE 11.
+    (Chuan Liu via cnauroth)
+
+    YARN-2103. Inconsistency between viaProto flag and initial value of 
+    SerializedExceptionProto.Builder (Binglin Chang via junping_du)
+
+    YARN-1550. NPE in FairSchedulerAppsBlock#render. (Anubhav Dhoot via kasha)
+
+    YARN-2119. DEFAULT_PROXY_ADDRESS should use DEFAULT_PROXY_PORT.
+    (Anubhav Dhoot via kasha)
+
+    YARN-2118. Fixed the type mismatch in Map#containsKey check of
+    TimelineWebServices#injectOwnerInfo. (Ted Yu via zjshen)
+
+    YARN-2117. Fixed the issue that secret file reader is potentially not
+    closed in TimelineAuthenticationFilterInitializer. (Chen He via zjshen)
+
+    YARN-2121. Fixed NPE handling in Timeline Server's TimelineAuthenticator.
+    (Zhijie Shen via vinodkv)
+
+    YARN-2128. FairScheduler: Incorrect calculation of amResource usage.
+    (Wei Yan via kasha)
+
+    YARN-2124. Fixed NPE in ProportionalCapacityPreemptionPolicy. (Wangda Tan
+    via jianhe)
+
+    YARN-2148. TestNMClient failed due more exit code values added and passed
+    to AM (Wangda Tan via bikas)
+
+    YARN-2075. Fixed the test failure of TestRMAdminCLI. (Kenji Kikushima via
+    zjshen)
+
+    YARN-2155. FairScheduler: Incorrect threshold check for preemption.
+    (Wei Yan via kasha)
+
+    YARN-1885. Fixed a bug that RM may not send application-clean-up signal
+    to NMs where the completed applications previously ran in case of RM restart.
+    (Wangda Tan via jianhe)
+
+    YARN-2167. LeveldbIterator should get closed in
+    NMLeveldbStateStoreService#loadLocalizationState() within finally block
+    (Junping Du via jlowe)
+
+    YARN-2187. FairScheduler: Disable max-AM-share check by default.
+    (Robert Kanter via kasha)
+
+    YARN-2111. In FairScheduler.attemptScheduling, we don't count containers
+    as assigned if they have 0 memory but non-zero cores (Sandy Ryza)
+
+    YARN-2204. TestAMRestart#testAMRestartWithExistingContainers assumes
+    CapacityScheduler. (Robert Kanter via kasha)
+
+    YARN-2163. WebUI: Order of AppId in apps table should be consistent with
+    ApplicationId.compareTo(). (Wangda Tan via raviprak)
+
+    YARN-2104. Scheduler queue filter failed to work because index of queue
+    column changed. (Wangda Tan via jlowe)
+
+    YARN-2201. Made TestRMWebServicesAppsModification be independent of the
+    changes on yarn-default.xml. (Varun Vasudev via zjshen)
+
+    YARN-2216 YARN-2065 AM cannot create new containers after restart
+    (Jian He via stevel)
+
+    YARN-2232. Fixed ResourceManager to allow DelegationToken owners to be able
+    to cancel their own tokens in secure mode. (Varun Vasudev via vinodkv)
+
+    YARN-2250. FairScheduler.findLowestCommonAncestorQueue returns null when
+    queues not identical (Krisztian Horvath via Sandy Ryza)
+
+    YARN-2158. Improved assertion messages of TestRMWebServicesAppsModification.
+    (Varun Vasudev via zjshen)
+
+    YARN-2269. Remove external links from YARN UI. (Craig Welch via xgong)
+
+    YARN-2270. Made TestFSDownload#testDownloadPublicWithStatCache be skipped
+    when there’s no ancestor permissions. (Akira Ajisaka via zjshen)
+
+    YARN-2319. Made the MiniKdc instance start/close before/after the class of
+    TestRMWebServicesDelegationTokens. (Wenwu Peng via zjshen)
+
+    YARN-2335. Annotate all hadoop-sls APIs as @Private. (Wei Yan via kasha)
+
+    YARN-1726. ResourceSchedulerWrapper broken due to AbstractYarnScheduler. 
+    (Wei Yan via kasha)
+
+    YARN-2216. TestRMApplicationHistoryWriter sometimes fails in trunk.
+    (Zhijie Shen via xgong)
+
+Release 2.4.1 - 2014-06-23 
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-1892. Improved some logs in the scheduler. (Jian He via zjshen)
+
+    YARN-1696. Added documentation for ResourceManager fail-over. (Karthik
+    Kambatla, Masatake Iwasaki, Tsuyoshi OZAWA via vinodkv)
+
+    YARN-1701. Improved default paths of the timeline store and the generic
+    history store. (Tsuyoshi Ozawa via zjshen)
+
+    YARN-1962. Changed Timeline Service client configuration to be off by default
+    given the non-readiness of the feature yet. (Mohammad Kamrul Islam via
+    vinodkv)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-1898. Made Standby RM links conf, stacks, logLevel, metrics, jmx, logs
+    and static not be redirected to Active RM. (Xuan Gong via zjshen)
+
+    YARN-1837. Fixed TestMoveApplication#testMoveRejectedByScheduler failure.
+    (Hong Zhiguo via jianhe)
+
+    YARN-1905. TestProcfsBasedProcessTree must only run on Linux. (cnauroth)
+
+    YARN-1883. TestRMAdminService fails due to inconsistent entries in
+    UserGroups (Mit Desai via jeagles)
+
+    YARN-1908. Fixed DistributedShell to not fail in secure clusters. (Vinod
+    Kumar Vavilapalli and Jian He via vinodkv)
+
+    YARN-1910. Fixed a race condition in TestAMRMTokens that causes the test to
+    fail more often on Windows. (Xuan Gong via vinodkv)
+
+    YARN-1920. Fixed TestFileSystemApplicationHistoryStore failure on windows.
+    (Vinod Kumar Vavilapalli via zjshen)
+
+    YARN-1914. Fixed resource-download on NodeManagers to skip permission
+    verification of public cache files in Windows+local file-system environment.
+    (Varun Vasudev via vinodkv)
+
+    YARN-1903. Set exit code and diagnostics when container is killed at
+    NEW/LOCALIZING state. (Zhijie Shen via jianhe)
+
+    YARN-1924. Made ZKRMStateStore updateApplication(Attempt)StateInternal work
+    when Application(Attempt) state hasn't been stored before. (Jian He via
+    zjshen)
+
+    YARN-1926. Changed DistributedShell to use appIDs as unique identifiers for
+    HDFS paths and thus avoid test failures on Windows. (Varun Vasudev via
+    vinodkv)
+
+    YARN-1833. TestRMAdminService Fails in trunk and branch-2 (Mit Desai via
+    jeagles)
+
+    YARN-1907. TestRMApplicationHistoryWriter#testRMWritingMassiveHistory 
+    intermittently fails. (Mit Desai via kihwal)
+
+    YARN-1933. Fixed test issues with TestAMRestart and TestNodeHealthService.
+    (Jian He via vinodkv)
+
+    YARN-1928. Fixed a race condition in TestAMRMRPCNodeUpdates which caused it
+    to fail occassionally. (Zhijie Shen via vinodkv)
+
+    YARN-1934. Fixed a potential NPE in ZKRMStateStore caused by handling
+    Disconnected event from ZK. (Karthik Kambatla via jianhe)
+
+    YARN-1931. Private API change in YARN-1824 in 2.4 broke compatibility 
+    with previous releases (Sandy Ryza via tgraves)
+
+    YARN-1750. TestNodeStatusUpdater#testNMRegistration is incorrect in test 
+    case. (Wangda Tan via junping_du)
+
+    YARN-1947. TestRMDelegationTokens#testRMDTMasterKeyStateOnRollingMasterKey 
+    is failing intermittently. (Jian He via junping_du)
+
+    YARN-1281. Fixed TestZKRMStateStoreZKClientConnections to not fail
+    intermittently due to ZK-client timeouts. (Tsuyoshi Ozawa via vinodkv) 
+
+    YARN-1932. Javascript injection on the job status page (Mit Desai via
+    jlowe)
+
+    YARN-1975. Used resources shows escaped html in CapacityScheduler and
+    FairScheduler page (Mit Desai via jlowe)
+
+    YARN-1929. Fixed a deadlock in ResourceManager that occurs when failover
+    happens right at the time of shutdown. (Karthik Kambatla via vinodkv)
+
+    YARN-1201. TestAMAuthorization fails with local hostname cannot be resolved. 
+    (Wangda Tan via junping_du)
+
+    YARN-1861. Fixed a bug in RM to reset leader-election on fencing that was
+    causing both RMs to be stuck in standby mode when automatic failover is
+    enabled. (Karthik Kambatla and Xuan Gong via vinodkv)
+
+    YARN-1957. Consider the max capacity of the queue when computing the ideal
+    capacity for preemption. (Carlo Curino via cdouglas)
+
+    YARN-1986. In Fifo Scheduler, node heartbeat in between creating app and
+    attempt causes NPE (Hong Zhiguo via Sandy Ryza)
+
+    YARN-1976. Fix yarn application CLI to print the scheme of the tracking url
+    of failed/killed applications. (Junping Du via jianhe)
+
+    YARN-2016. Fix a bug in GetApplicationsRequestPBImpl to add the missed fields
+    to proto. (Junping Du via jianhe)
+
+    YARN-2053. Fixed a bug in AMS to not add null NMToken into NMTokens list from
+    previous attempts for work-preserving AM restart. (Wangda Tan via jianhe)
+
+    YARN-2066. Wrong field is referenced in GetApplicationsRequestPBImpl#mergeLocalToBuilder()
+    (Hong Zhiguo via junping_du)
+
+    YARN-2081. Fixed TestDistributedShell failure after YARN-1962. (Zhiguo Hong
+    via zjshen)
+
+Release 2.4.0 - 2014-04-07 
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-930. Bootstrapping ApplicationHistoryService module. (vinodkv)
+  
+    YARN-947. Implementing the data objects to be used by the History reader
+    and writer interfaces. (Zhijie Shen via vinodkv)
+  
+    YARN-934. Defined a Writer Interface for HistoryStorage. (Zhijie Shen via
+    vinodkv)
+  
+    YARN-925. Defined a Reader Interface for HistoryStorage. (Mayank Bansal via
+    vinodkv)
+  
+    YARN-978. Created ApplicationAttemptReport. (Mayank Bansal via vinodkv)
+  
+    YARN-956. Added a testable in-memory HistoryStorage. (Mayank Bansal via
+    vinodkv)
+  
+    YARN-975. Added a file-system implementation for HistoryStorage. (Zhijie Shen
+    via vinodkv)
+  
+    YARN-1123. Added a new ContainerReport and its Protobuf implementation. (Mayank
+    Bansal via vinodkv)
+  
+    YARN-979. Added more APIs for getting information about ApplicationAttempts
+    and Containers from ApplicationHistoryProtocol. (Mayank Bansal and Zhijie Shen
+    via vinodkv)
+  
+    YARN-953. Changed ResourceManager to start writing history data. (Zhijie Shen
+    via vinodkv)
+  
+    YARN-1266. Implemented PB service and client wrappers for
+    ApplicationHistoryProtocol. (Mayank Bansal via vinodkv)
+  
+    YARN-955. Implemented ApplicationHistoryProtocol handler. (Mayank Bansal via
+    vinodkv)
+  
+    YARN-1242. Changed yarn scripts to be able to start ApplicationHistoryServer
+    as an individual process. (Mayank Bansal via vinodkv)
+  
+    YARN-954. Implemented web UI for the ApplicationHistoryServer and wired it into
+    the HistoryStorage. (Zhijie Shen via vinodkv)
+  
+    YARN-967. Added the client and CLI interfaces for obtaining ApplicationHistory
+    data. (Mayank Bansal via vinodkv)
+  
+    YARN-1023. Added Webservices REST APIs support for Application History. (Zhijie
+    Shen via vinodkv)
+  
+    YARN-1413. Implemented serving of aggregated-logs in the ApplicationHistory
+    server. (Mayank Bansal via vinodkv)
+
+    YARN-1633. Defined user-facing entity, entity-info and event objects related
+    to Application Timeline feature. (Zhijie Shen via vinodkv)
+
+    YARN-1611. Introduced the concept of a configuration provider which can be
+    used by ResourceManager to read configuration locally or from remote systems
+    so as to help RM failover. (Xuan Gong via vinodkv)
+
+    YARN-1659. Defined the ApplicationTimelineStore store as an abstraction for
+    implementing different storage impls for storing timeline information.
+    (Billie Rinaldi via vinodkv)
+
+    YARN-1634. Added a testable in-memory implementation of
+    ApplicationTimelineStore. (Zhijie Shen via vinodkv)
+
+    YARN-1461. Added tags for YARN applications and changed RM to handle them.
+    (Karthik Kambatla via zjshen)
+
+    YARN-1636. Augmented Application-history server's web-services to also expose
+    new APIs for retrieving and storing timeline information. (Zhijie Shen via
+    vinodkv)
+
+    YARN-1490. Introduced the ability to make ResourceManager optionally not kill
+    all containers when an ApplicationMaster exits. (Jian He via vinodkv)
+
+    YARN-1041. Added the ApplicationMasterProtocol API for applications to use the
+    ability in ResourceManager to optionally not kill containers when the
+    ApplicationMaster exits. (Jian He via vinodkv)
+
+    YARN-1566. Changed Distributed Shell to retain containers across application
+    attempts. (Jian He via vinodkv)
+
+    YARN-1635. Implemented a Leveldb based ApplicationTimelineStore. (Billie
+    Rinaldi via zjshen)
+
+    YARN-1637. Implemented a client library for Java users to post timeline
+    entities and events. (zjshen)
+    
+    YARN-1496. Protocol additions to allow moving apps between queues (Sandy
+    Ryza)
+
+    YARN-1498. Common scheduler changes for moving apps between queues (Sandy
+    Ryza)
+
+    YARN-1504. RM changes for moving apps between queues (Sandy Ryza)
+
+    YARN-1499. Fair Scheduler changes for moving apps between queues (Sandy
+    Ryza)
+
+    YARN-1497. Command line additions for moving apps between queues (Sandy
+    Ryza)
+
+    YARN-1588. Enhanced RM and the scheduling protocol to also send NMTokens of
+    transferred containers from previous app-attempts to new AMs after YARN-1490.
+    (Jian He via vinodkv)
+
+    YARN-1717. Enabled periodically discarding old data in LeveldbTimelineStore.
+    (Billie Rinaldi via zjshen)
+
+    YARN-1690. Made DistributedShell send timeline entities+events. (Mayank Bansal
+    via zjshen)
+
+    YARN-1775. Enhanced ProcfsBasedProcessTree to optionally add the ability to
+    use smaps for obtaining used memory information. (Rajesh Balamohan via
+    vinodkv)
+
+    YARN-1838. Enhanced timeline service getEntities API to get entities from a
+    given entity ID or insertion timestamp. (Billie Rinaldi via zjshen)
+
+  IMPROVEMENTS
+
+    YARN-1007. Enhance History Reader interface for Containers. (Mayank Bansal via
+    devaraj)
+  
+    YARN-974. Added more information to RMContainer to be collected and recorded in
+    Application-History. (Zhijie Shen via vinodkv)
+  
+    YARN-987. Added ApplicationHistoryManager responsible for exposing reports to
+    all clients. (Mayank Bansal via vinodkv)
+
+    YARN-1630. Introduce timeout for async polling operations in YarnClientImpl
+    (Aditya Acharya via Sandy Ryza)
+
+    YARN-1617. Remove ancient comment and surround LOG.debug in
+    AppSchedulingInfo.allocate (Sandy Ryza)
+
+    YARN-1639. Modified RM HA configuration handling to have a way of not
+    requiring separate configuration files for each RM. (Xuan Gong via vinodkv)
+
+    YARN-1668. Modified RM HA handling of admin-acls to be available across RM
+    failover by making using of a remote configuration-provider. (Xuan Gong via
+    vinodkv)
+
+    YARN-1667. Modified RM HA handling of super users (with proxying ability) to
+    be available across RM failover by making using of a remote
+    configuration-provider. (Xuan Gong via vinodkv)
+
+    YARN-1285. Changed the default value of yarn.acl.enable in yarn-default.xml
+    to be consistent with what exists (false) in the code and documentation.
+    (Kenji Kikushima via vinodkv)
+
+    YARN-1669. Modified RM HA handling of protocol level service-ACLS to
+    be available across RM failover by making using of a remote
+    configuration-provider. (Xuan Gong via vinodkv)
+
+    YARN-1665. Simplify the configuration of RM HA by having better default
+    values. (Xuan Gong via vinodkv)
+
+    YARN-1660. Simplified the RM HA configuration to accept and be able to simply
+    depend just on configuration properties of the form
+    yarn.resourcemanager.hostname.RMID and use the default ports for all service
+    addresses. (Xuan Gong via vinodkv)
+
+    YARN-1493. Changed ResourceManager and Scheduler interfacing to recognize
+    app-attempts separately from apps. (Jian He via vinodkv)
+
+    YARN-1459. Changed ResourceManager to depend its service initialization
+    on the configuration-provider mechanism during startup too. (Xuan Gong via
+    vinodkv)
+
+    YARN-1706. Created an utility method to dump timeline records to JSON
+    strings. (zjshen)
+
+    YARN-1641. ZK store should attempt a write periodically to ensure it is 
+    still Active. (kasha)
+
+    YARN-1531. True up yarn command documentation (Akira Ajisaka via kasha)
+
+    YARN-1345. Remove FINAL_SAVING state from YarnApplicationAttemptState
+    (Zhijie Shen via jianhe)
+
+    YARN-1676. Modified RM HA handling of user-to-group mappings to
+    be available across RM failover by making using of a remote
+    configuration-provider. (Xuan Gong via vinodkv)
+
+    YARN-1666. Modified RM HA handling of include/exclude node-lists to be
+    available across RM failover by making using of a remote
+    configuration-provider. (Xuan Gong via vinodkv)
+
+    YARN-1171. Add default queue properties to Fair Scheduler documentation
+    (Naren Koneru via Sandy Ryza)
+
+    YARN-1470. Add audience annotations to MiniYARNCluster. (Anubhav Dhoot
+    via kasha)
+
+    YARN-1732. Changed types of related-entities and primary-filters in the
+    timeline-service to be sets instead of maps. (Billie Rinaldi via vinodkv)
+
+    YARN-1687. Renamed user-facing records for the timeline-service to be simply
+    named after 'timeline' instead of 'apptimeline'. (Zhijie Shen via vinodkv)
+
+    YARN-1749. Updated application-history related configs to reflect the latest
+    reality and to be consistently named. (Zhijie Shen via vinodkv)
+
+    YARN-1301. Added the INFO level log of the non-empty blacklist additions
+    and removals inside ApplicationMasterService. (Tsuyoshi Ozawa via zjshen)
+
+    YARN-1528. Allow setting auth for ZK connections. (kasha)
+
+    YARN-1704. Modified LICENSE and NOTICE files to reflect newly used levelDB
+    related libraries. (Billie Rinaldi via vinodkv)
+
+    YARN-1765. Added test cases to verify that killApplication API works across
+    ResourceManager failover. (Xuan Gong via vinodkv) 
+
+    YARN-1730. Implemented simple write-locking in the LevelDB based timeline-
+    store. (Billie Rinaldi via vinodkv)
+
+    YARN-986. Changed client side to be able to figure out the right RM Delegation
+    token for the right ResourceManager when HA is enabled. (Karthik Kambatla via
+    vinodkv)
+
+    YARN-1761. Modified RMAdmin CLI to check whether HA is enabled or not before
+    it executes any of the HA admin related commands. (Xuan Gong via vinodkv)
+
+    YARN-1780. Improved logging in the Timeline client and server. (Zhijie Shen
+    via vinodkv)
+
+    YARN-1525. Web UI should redirect to active RM when HA is enabled. (Cindy Li
+    via kasha)
+
+    YARN-1781. Modified NodeManagers to allow admins to specify max disk
+    utilization for local disks so as to be able to offline full disks. (Varun
+    Vasudev via vinodkv)
+
+    YARN-1410. Added tests to validate that clients can fail-over to a new RM
+    after getting an application-ID but before submission and can still submit to
+    the newly active RM with no issues. (Xuan Gong via vinodkv)
+
+    YARN-1764. Modified YarnClient to correctly handle failover of ResourceManager
+    after the submitApplication call goes through. (Xuan Gong via vinodkv)
+
+    YARN-1389. Made ApplicationClientProtocol and ApplicationHistoryProtocol
+    expose analogous getApplication(s)/Attempt(s)/Container(s) APIs. (Mayank
+    Bansal via zjshen)
+
+    YARN-1658. Modified web-app framework to let standby RMs redirect
+    web-service calls to the active RM. (Cindy Li via vinodkv)
+
+    YARN-1824. Improved NodeManager and clients to be able to handle cross
+    platform application submissions. (Jian He via vinodkv)
+
+    YARN-1512. Enhanced CapacityScheduler to be able to decouple scheduling from
+    node-heartbeats. (Arun C Murthy via vinodkv)
+
+    YARN-1570. Fixed formatting of the lines in YarnCommands.apt.vm docs source.
+    (Akira Ajisaka via vinodkv)
+
+    YARN-1536. Cleanup: Get rid of ResourceManager#get*SecretManager() methods 
+    and use the RMContext methods instead. (Anubhav Dhoot via kasha)
+
+    YARN-1850. Introduced the ability to optionally disable sending out timeline-
+    events in the TimelineClient. (Zhijie Shen via vinodkv)
+
+    YARN-1452. Added documentation about the configuration and usage of generic
+    application history and the timeline data service. (Zhijie Shen via vinodkv)
+
+    YARN-1891. Added documentation for NodeManager health-monitoring. (Varun
+    Vasudev via vinodkv)
+
+    YARN-1017. Added documentation for ResourceManager Restart.(jianhe)
+
+  OPTIMIZATIONS
+
+    YARN-1771. Reduce the number of NameNode operations during localization of
+    public resources using a cache. (Sangjin Lee via cdouglas)
+
+  BUG FIXES
+
+    YARN-935. Correcting pom.xml to build applicationhistoryserver module
+    successfully. (Zhijie Shen via vinodkv)
+  
+    YARN-962. Fixed bug in application-history proto file and renamed it be just
+    a client proto file. (Zhijie Shen via vinodkv)
+  
+    YARN-984. Renamed the incorrectly named applicationhistoryservice.records.pb.impl
+    package to be applicationhistoryservice.records.impl.pb. (Devaraj K via vinodkv)
+  
+    YARN-1534. Fixed failure of test TestAHSWebApp. (Shinichi Yamashita via vinodkv)
+  
+    YARN-1555. Fixed test failures in applicationhistoryservice.* (Vinod Kumar 
+    Vavilapalli via mayank)
+  
+    YARN-1594. Updated pom.xml of applicationhistoryservice sub-project according to
+    YARN-888. (Vinod Kumar Vavilapalli via zjshen)
+  
+    YARN-1596. Fixed Javadoc warnings on branch YARN-321. (Vinod Kumar Vavilapalli
+    via zjshen)
+  
+    YARN-1597. Fixed Findbugs warnings on branch YARN-321. (Vinod Kumar Vavilapalli
+    via zjshen)
+  
+    YARN-1595. Made enabling history service configurable and fixed test failures on
+    branch YARN-321. (Vinod Kumar Vavilapalli via zjshen)
+  
+    YARN-1605. Fixed formatting issues in the new module on branch YARN-321. (Vinod
+    Kumar Vavilapalli via zjshen)
+
+    YARN-1625. Fixed RAT warnings after YARN-321 merge. (Shinichi Yamashita via
+    vinodkv)
+
+    YARN-1613. Fixed the typo with the configuration name
+    YARN_HISTORY_SERVICE_ENABLED. (Akira Ajisaka via vinodkv)
+
+    YARN-1618. Fix invalid RMApp transition from NEW to FINAL_SAVING (kasha)
+
+    YARN-1600. RM does not startup when security is enabled without spnego
+    configured (Haohui Mai via jlowe)
+
+    YARN-1642. RMDTRenewer#getRMClient should use ClientRMProxy (kasha)
+
+    YARN-1632. TestApplicationMasterServices should be under
+    org.apache.hadoop.yarn.server.resourcemanager package (Chen He via jeagles)
+
+    YARN-1673. Fix option parsing in YARN's application CLI after it is broken
+    by YARN-967. (Mayank Bansal via vinodkv)
+
+    YARN-1684. Fixed history server heap size in yarn script. (Billie Rinaldi
+    via zjshen)
+
+    YARN-1166. Fixed app-specific and attempt-specific QueueMetrics to be
+    triggered by accordingly app event and attempt event. 
+
+    YARN-1689. Made RMAppAttempt get killed when RMApp is at ACCEPTED. (Vinod
+    Kumar Vavilapalli via zjshen)
+
+    YARN-1661. Fixed DS ApplicationMaster to write the correct exit log. (Vinod
+    Kumar Vavilapalli via zjshen)
+
+    YARN-1672. YarnConfiguration is missing a default for 
+    yarn.nodemanager.log.retain-seconds (Naren Koneru via kasha)
+
+    YARN-1698. Fixed default TimelineStore in code to match what is documented
+    in yarn-default.xml (Zhijie Shen via vinodkv)
+
+    YARN-1697. NodeManager reports negative running containers (Sandy Ryza)
+
+    YARN-1719. Fixed the root path related Jersey warnings produced in
+    ATSWebServices. (Billie Rinaldi via zjshen)
+
+    YARN-1692. ConcurrentModificationException in fair scheduler AppSchedulable
+    (Sangjin Lee via Sandy Ryza)
+
+    YARN-1578. Fixed reading incomplete application attempt and container data
+    in FileSystemApplicationHistoryStore. (Shinichi Yamashita via zjshen)
+
+    YARN-1417. Modified RM to generate container-tokens not at creation time, but
+    at allocation time so as to prevent RM from shelling out containers with
+    expired tokens. (Omkar Vinit Joshi and Jian He via vinodkv)
+
+    YARN-1553. Modified YARN and MR to stop using HttpConfig.isSecure() and
+    instead rely on the http policy framework. And also fix some bugs related
+    to https handling in YARN web-apps. (Haohui Mai via vinodkv)
+
+    YARN-1721. When moving app between queues in Fair Scheduler, grab lock on
+    FSSchedulerApp (Sandy Ryza)
+
+    YARN-1724. Race condition in Fair Scheduler when continuous scheduling is
+    turned on (Sandy Ryza)
+
+    YARN-1590. Fixed ResourceManager, web-app proxy and MR JobHistoryServer to
+    expand _HOST properly in their kerberos principles. (Mohammad Kamrul Islam
+    va vinodkv)
+
+    YARN-1428. Fixed RM to write the final state of RMApp/RMAppAttempt to the 
+    application history store in the transition to the final state. (Contributed
+    by Zhijie Shen)
+
+    YARN-713. Fixed ResourceManager to not crash while building tokens when DNS
+    issues happen transmittently. (Jian He via vinodkv)
+
+    YARN-1398. Fixed a deadlock in ResourceManager between users requesting
+    queue-acls and completing containers. (vinodkv)
+
+    YARN-1071. Enabled ResourceManager to recover cluster metrics
+    numDecommissionedNMs after restarting. (Jian He via zjshen)
+
+    YARN-1742. Fixed javadoc of configuration parameter
+    DEFAULT_NM_MIN_HEALTHY_DISKS_FRACTION. (Akira Ajisaka via vinodkv)
+
+    YARN-1686. Fixed NodeManager to properly handle any errors during
+    re-registration after a RESYNC and thus avoid hanging. (Rohith Sharma via
+    vinodkv)
+
+    YARN-1734. Fixed ResourceManager to update the configurations when it
+    transits from standby to active mode so as to assimilate any changes that
+    happened while it was in standby mode. (Xuan Gong via vinodkv)
+
+    YARN-1760. TestRMAdminService assumes CapacityScheduler. (kasha)
+
+    YARN-1758. Fixed ResourceManager to not mandate the presence of site specific
+    configuration files and thus fix failures in downstream tests. (Xuan Gong via
+    vinodkv)
+
+    YARN-1748. Excluded core-site.xml from hadoop-yarn-server-tests package's jar
+    and thus avoid breaking downstream tests. (Sravya Tirukkovalur via vinodkv)
+
+    YARN-1729. Made TimelineWebServices deserialize the string primary- and
+    secondary-filters param into the JSON-compatible object. (Billie Rinaldi via
+    zjshen)
+
+    YARN-1766. Fixed a bug in ResourceManager to use configuration loaded from the
+    configuration-provider when booting up. (Xuan Gong via vinodkv)
+
+    YARN-1768. Fixed error message being too verbose when killing a non-existent
+    application. (Tsuyoshi OZAWA via raviprak)
+    
+    YARN-1774. FS: Submitting to non-leaf queue throws NPE. (Anubhav Dhoot and
+    Karthik Kambatla via kasha)
+
+    YARN-1783. Fixed a bug in NodeManager's status-updater that was losing
+    completed container statuses when NodeManager is forced to resync by the
+    ResourceManager. (Jian He via vinodkv) 
+
+    YARN-1787. Fixed help messages for applicationattempt and container
+    sub-commands in bin/yarn. (Zhijie Shen via vinodkv)
+
+    YARN-1793. Fixed ClientRMService#forceKillApplication not killing unmanaged
+    application. (Karthik Kambatla via jianhe)
+
+    YARN-1788. Fixed a bug in ResourceManager to set the apps-completed and
+    apps-killed metrics correctly for killed applications. (Varun Vasudev via
+    vinodkv)
+
+    YARN-1821. NPE on registerNodeManager if the request has containers for 
+    UnmanagedAMs. (kasha)
+
+    YARN-1800. Fixed NodeManager to gracefully handle RejectedExecutionException
+    in the public-localizer thread-pool. (Varun Vasudev via vinodkv)
+
+    YARN-1444. Fix CapacityScheduler to deal with cases where applications
+    specify host/rack requests without off-switch request. (Wangda Tan via
+    acmurthy)
+
+    YARN-1812. Fixed ResourceManager to synchrously renew tokens after recovery
+    and thus recover app itself synchronously and avoid races with resyncing
+    NodeManagers. (Jian He via vinodkv)
+
+    YARN-1816. Fixed ResourceManager to get RMApp correctly handle
+    ATTEMPT_FINISHED event at ACCEPTED state that can happen after RM restarts.
+    (Jian He via vinodkv)
+
+    YARN-1789. ApplicationSummary does not escape newlines in the app name
+    (Tsuyoshi OZAWA via jlowe)
+
+    YARN-1830. Fixed TestRMRestart#testQueueMetricsOnRMRestart failure due to
+    race condition when app is submitted. (Zhijie Shen via jianhe)
+
+    YARN-1685. Fixed few bugs related to handling of containers' log-URLs on
+    ResourceManager and history-service. (Zhijie Shen via vinodkv)
+
+    YARN-1206. Fixed AM container log to show on NM web page after application
+    finishes if log-aggregation is disabled. (Rohith Sharmaks via jianhe)
+
+    YARN-1591. Fixed AsyncDispatcher to handle interrupts on shutdown in a sane
+    manner and thus fix failure of TestResourceTrackerService. (Tsuyoshi Ozawa
+    via vinodkv)
+
+    YARN-1839. Fixed handling of NMTokens in ResourceManager such that containers
+    launched by AMs running on the same machine as the AM are correctly
+    propagated. (Jian He via vinodkv)
+
+    YARN-1640. Fixed manual failover of ResourceManagers to work correctly in
+    secure clusters. (Xuan Gong via vinodkv)
+
+    YARN-1855. Made Application-history server to be optional in MiniYARNCluster
+    and thus avoid the failure of TestRMFailover#testRMWebAppRedirect. (Zhijie
+    Shen via vinodkv)
+
+    YARN-1859. Fixed WebAppProxyServlet to correctly handle applications absent
+    on the ResourceManager. (Zhijie Shen via vinodkv)
+
+    YARN-1811. Fixed AMFilters in YARN to correctly accept requests from either
+    web-app proxy or the RMs when HA is enabled. (Robert Kanter via vinodkv)
+
+    YARN-1670. Fixed a bug in log-aggregation that can cause the writer to write
+    more log-data than the log-length that it records. (Mit Desai via vinodk)
+
+    YARN-1849. Fixed NPE in ResourceTrackerService#registerNodeManager for UAM
+    (Karthik Kambatla via jianhe )
+
+    YARN-1863. Fixed test failure in TestRMFailover after YARN-1859. (Xuan Gong
+    via vinodkv)
+
+    YARN-1854. Fixed test failure in TestRMHA#testStartAndTransitions. (Rohith
+    Sharma KS via vinodkv)
+
+    YARN-1776. Fixed DelegationToken renewal to survive RM failover. (Zhijie
+    Shen via jianhe)
+
+    YARN-1577. Made UnmanagedAMLauncher do launchAM after the attempt reaches
+    the LAUNCHED state. (Jian He via zjshen)
+
+    YARN-1785. FairScheduler treats app lookup failures as ERRORs. 
+    (bc Wong via kasha)
+
+    YARN-1752. Fixed ApplicationMasterService to reject unregister request if
+    AM did not register before. (Rohith Sharma via jianhe)
+
+    YARN-1846. TestRM#testNMTokenSentForNormalContainer assumes CapacityScheduler.
+    (Robert Kanter via kasha)
+
+    YARN-1705. Reset cluster-metrics on transition to standby. (Rohith via kasha)
+
+    YARN-1852. Fixed RMAppAttempt to not resend AttemptFailed/AttemptKilled
+    events to already recovered Failed/Killed RMApps. (Rohith via jianhe)
+
+    YARN-1866. Fixed an issue with renewal of RM-delegation tokens on restart or
+    fail-over. (Jian He via vinodkv)
+
+    YARN-1867. Fixed a bug in ResourceManager that was causing invalid ACL checks
+    in the web-services after fail-over. (Vinod Kumar Vavilapalli)
+
+    YARN-1521. Mark Idempotent/AtMostOnce annotations to the APIs in
+    ApplicationClientProtcol, ResourceManagerAdministrationProtocol and
+    ResourceTrackerProtocol so that they work in HA scenario. (Xuan Gong
+    via jianhe)
+
+    YARN-1873. Fixed TestDistributedShell failure when the test cases are out of
+    order. (Mit Desai via zjshen)
+
+    YARN-1893. Mark AtMostOnce annotation to ApplicationMasterProtocol#allocate.
+    (Xuan Gong via jianhe)
+
+Release 2.3.1 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 2.3.0 - 2014-02-18
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-649. Added a new NM web-service to serve container logs in plain text
+    over HTTP. (Sandy Ryza via vinodkv)
+
+    YARN-1021. Yarn Scheduler Load Simulator. (ywskycn via tucu)
+
+    YARN-1010. FairScheduler: decouple container scheduling from nodemanager
+    heartbeats. (Wei Yan via Sandy Ryza)
+
+    YARN-1253. Changes to LinuxContainerExecutor to run containers as a single 
+    dedicated user in non-secure mode. (rvs via tucu)
+
+    YARN-1027. Implement RMHAProtocolService (Karthik Kambatla via bikas)
+
+    YARN-1068. Add admin support for HA operations (Karthik Kambatla via
+    bikas)
+
+    YARN-311. RM/scheduler support for dynamic resource configuration.
+    (Junping Du via llu)
+
+    YARN-1392. Allow sophisticated app-to-queue placement policies in the Fair
+    Scheduler (Sandy Ryza)
+
+    YARN-1447. Common PB type definitions for container resizing. (Wangda Tan
+    via Sandy Ryza)
+
+    YARN-1448. AM-RM protocol changes to support container resizing (Wangda Tan
+    via Sandy Ryza)
+
+    YARN-312. Introduced ResourceManagerAdministrationProtocol changes to support
+    changing resources on node. (Junping Du via vinodkv)
+
+    YARN-1028. Added FailoverProxyProvider capability to ResourceManager to help
+    with RM failover. (Karthik Kambatla via vinodkv)
+
+    YARN-1029. Added embedded leader election in the ResourceManager. (Karthik
+    Kambatla via vinodkv)
+
+    YARN-1033. Expose RM active/standby state to Web UI and REST API (kasha)
+
+  IMPROVEMENTS
+
+    YARN-305. Fair scheduler logs too many "Node offered to app" messages.
+    (Lohit Vijayarenu via Sandy Ryza)
+
+    YARN-1258. Allow configuring the Fair Scheduler root queue (Sandy Ryza)
+
+    YARN-1288. Make Fair Scheduler ACLs more user friendly (Sandy Ryza)
+
+    YARN-1315. TestQueueACLs should also test FairScheduler (Sandy Ryza)
+
+    YARN-1335. Move duplicate code from FSSchedulerApp and FiCaSchedulerApp
+    into SchedulerApplication (Sandy Ryza)
+
+    YARN-1333. Support blacklisting in the Fair Scheduler (Tsuyoshi Ozawa via
+    Sandy Ryza)
+
+    YARN-1109. Demote NodeManager "Sending out status for container" logs to
+    debug (haosdent via Sandy Ryza)
+
+    YARN-1321. Changed NMTokenCache to support both singleton and an instance
+    usage. (Alejandro Abdelnur via vinodkv) 
+
+    YARN-1388. Fair Scheduler page always displays blank fair share (Liyin Liang
+    via Sandy Ryza)
+
+    YARN-7. Support CPU resource for DistributedShell. (Junping Du via llu)
+
+    YARN-905. Add state filters to nodes CLI (Wei Yan via Sandy Ryza)
+
+    YARN-1098. Separate out RM services into Always On and Active (Karthik
+    Kambatla via bikas)
+
+    YARN-353. Add Zookeeper-based store implementation for RMStateStore.
+    (Bikas Saha, Jian He and Karthik Kambatla via hitesh)
+
+    YARN-819. ResourceManager and NodeManager should check for a minimum allowed
+    version (Robert Parker via jeagles)
+
+    YARN-425. coverage fix for yarn api (Aleksey Gorshkov via jeagles)
+
+    YARN-1199. Make NM/RM Versions Available (Mit Desai via jeagles)
+
+    YARN-1232. Configuration to support multiple RMs (Karthik Kambatla via
+    bikas)
+
+    YARN-465. fix coverage org.apache.hadoop.yarn.server.webproxy (Aleksey
+    Gorshkov and Andrey Klochkov via jlowe)
+
+    YARN-976. Document the meaning of a virtual core. (Sandy Ryza)
+
+    YARN-1182. MiniYARNCluster creates and inits the RM/NM only on start()
+    (Karthik Kambatla via Sandy Ryza)
+
+    HADOOP-9598. Improve code coverage of RMAdminCLI (Aleksey Gorshkov and
+    Andrey Klochkov via jeagles)
+
+    YARN-1306. Clean up hadoop-sls sample-conf according to YARN-1228 (Wei Yan
+    via Sandy Ryza)
+
+    YARN-891. Modified ResourceManager state-store to remember completed
+    applications so that clients can get information about them post RM-restart.
+    (Jian He via vinodkv)
+
+    YARN-1290. Let continuous scheduling achieve more balanced task assignment
+    (Wei Yan via Sandy Ryza)
+
+    YARN-786. Expose application resource usage in RM REST API (Sandy Ryza)
+
+    YARN-1323. Set HTTPS webapp address along with other RPC addresses in HAUtil
+    (Karthik Kambatla via Sandy Ryza)
+
+    YARN-1121. Changed ResourceManager's state-store to drain all events on
+    shut-down. (Jian He via vinodkv)
+
+    YARN-1387. RMWebServices should use ClientRMService for filtering
+    applications (Karthik Kambatla via Sandy Ryza)
+
+    YARN-1222. Make improvements in ZKRMStateStore for fencing (Karthik
+    Kambatla via bikas)
+
+    YARN-709. Added tests to verify validity of delegation tokens and logging of
+    appsummary after RM restart. (Jian He via vinodkv)
+
+    YARN-1210. Changed RM to start new app-attempts on RM restart only after
+    ensuring that previous AM exited or after expiry time. (Omkar Vinit Joshi via
+    vinodkv)
+
+    YARN-674. Fixed ResourceManager to renew DelegationTokens on submission
+    asynchronously to work around potential slowness in state-store. (Omkar Vinit
+    Joshi via vinodkv)
+
+    YARN-584. In scheduler web UIs, queues unexpand on refresh. (Harshit
+    Daga via Sandy Ryza)
+
+    YARN-1303. Fixed DistributedShell to not fail with multiple commands separated
+    by a semi-colon as shell-command. (Xuan Gong via vinodkv)
+
+    YARN-1423. Support queue placement by secondary group in the Fair Scheduler
+    (Ted Malaska via Sandy Ryza)
+
+    YARN-1314. Fixed DistributedShell to not fail with multiple arguments for a
+    shell command separated by spaces. (Xuan Gong via vinodkv)
+
+    YARN-1239. Modified ResourceManager state-store implementations to start
+    storing version numbers. (Jian He via vinodkv)
+
+    YARN-1241. In Fair Scheduler, maxRunningApps does not work for non-leaf
+    queues. (Sandy Ryza)
+
+    YARN-1318. Promoted AdminService to an Always-On service and merged it into
+    RMHAProtocolService. (Karthik Kambatla via vinodkv)
+
+    YARN-1332. In TestAMRMClient, replace assertTrue with assertEquals where
+    possible (Sebastian Wong via Sandy Ryza)
+
+    YARN-1403. Separate out configuration loading from QueueManager in the Fair
+    Scheduler (Sandy Ryza)
+
+    YARN-1181. Augment MiniYARNCluster to support HA mode (Karthik Kambatla)
+
+    YARN-546. Allow disabling the Fair Scheduler event log (Sandy Ryza)
+
+    YARN-807. When querying apps by queue, iterating over all apps is
+    inefficient and limiting (Sandy Ryza)
+
+    YARN-1378. Implemented a cleaner of old finished applications from the RM
+    state-store. (Jian He via vinodkv)
+
+    YARN-1481. Move internal services logic from AdminService to ResourceManager.
+    (vinodkv via kasha)
+
+    YARN-1491. Upgrade JUnit3 TestCase to JUnit 4 (Chen He via jeagles)
+
+    YARN-408. Change CapacityScheduler to not disable delay-scheduling by default.
+    (Mayank Bansal via vinodkv)
+
+    YARN-1325. Modified RM HA configuration validation to also ensure that
+    multiple RMs are configured. (Xuan Gong via vinodkv)
+
+    YARN-1311. Fixed app specific scheduler-events' names to be app-attempt
+    based. (vinodkv via jianhe)
+
+    YARN-1485. Modified RM HA configuration validation to also ensure that
+    service-address configuration are configured for every RM. (Xuan Gong via
+    vinodkv)
+
+    YARN-1435. Modified Distributed Shell to accept either the command or the
+    custom script. (Xuan Gong via zjshen)
+
+    YARN-1446. Changed client API to retry killing application till RM
+    acknowledges so as to account for RM crashes/failover. (Jian He via vinodkv)
+
+    YARN-1307. Redesign znode structure for Zookeeper based RM state-store for
+    better organization and scalability. (Tsuyoshi OZAWA via vinodkv)
+
+    YARN-1172. Convert SecretManagers in RM to services (Tsuyoshi OZAWA via kasha)
+
+    YARN-1523. Use StandbyException instead of RMNotYetReadyException (kasha)
+
+    YARN-1541. Changed ResourceManager to invalidate ApplicationMaster host/port
+    information once an AM crashes. (Jian He via vinodkv)
+
+    YARN-1482. Modified WebApplicationProxy to make it work across ResourceManager
+    fail-over. (Xuan Gong via vinodkv)
+
+    YARN-1568. Rename clusterid to clusterId in ActiveRMInfoProto (kasha)
+
+    YARN-1579. ActiveRMInfoProto fields should be optional (kasha)
+
+    YARN-888. Cleaned up POM files so that non-leaf modules don't include any
+    dependencies and thus compact the dependency list for leaf modules.
+    (Alejandro Abdelnur via vinodkv)
+
+    YARN-1567. In Fair Scheduler, allow empty queues to change between leaf and
+    parent on allocation file reload (Sandy Ryza)
+
+    YARN-1616. RMFatalEventDispatcher should log the cause of the event (kasha)
+
+    YARN-1624. QueuePlacementPolicy format is not easily readable via a JAXB
+    parser (Aditya Acharya via Sandy Ryza)
+
+    YARN-1623. Include queue name in RegisterApplicationMasterResponse (Sandy
+    Ryza)
+
+    YARN-1573. ZK store should use a private password for root-node-acls. 
+    (kasha).
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-1284. LCE: Race condition leaves dangling cgroups entries for killed
+    containers. (Alejandro Abdelnur via Sandy Ryza)
+
+    YARN-1283. Fixed RM to give a fully-qualified proxy URL for an application
+    so that clients don't need to do scheme-mangling. (Omkar Vinit Joshi via
+    vinodkv)
+
+    YARN-879. Fixed tests w.r.t o.a.h.y.server.resourcemanager.Application.
+    (Junping Du via devaraj)
+
+    YARN-1265. Fair Scheduler chokes on unhealthy node reconnect (Sandy Ryza)
+
+    YARN-1044. used/min/max resources do not display info in the scheduler page
+    (Sangjin Lee via Sandy Ryza)
+
+    YARN-1259. In Fair Scheduler web UI, queue num pending and num active apps
+    switched. (Robert Kanter via Sandy Ryza)
+
+    YARN-1295. In UnixLocalWrapperScriptBuilder, using bash -c can cause Text
+    file busy errors (Sandy Ryza)
+
+    YARN-1185. Fixed FileSystemRMStateStore to not leave partial files that
+    prevent subsequent ResourceManager recovery. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-1331. yarn.cmd exits with NoClassDefFoundError trying to run rmadmin or
+    logs. (cnauroth)
+
+    YARN-1330. Fair Scheduler: defaultQueueSchedulingPolicy does not take effect
+    (Sandy Ryza)
+    
+    YARN-1022. Unnecessary INFO logs in AMRMClientAsync (haosdent via bikas)
+    
+    YARN-1349. yarn.cmd does not support passthrough to any arbitrary class.
+    (cnauroth)
+    
+    YARN-1357. TestContainerLaunch.testContainerEnvVariables fails on Windows.
+    (Chuan Liu via cnauroth)
+
+    YARN-1358. TestYarnCLI fails on Windows due to line endings. (Chuan Liu via
+    cnauroth)
+
+    YARN-1343. NodeManagers additions/restarts are not reported as node updates 
+    in AllocateResponse responses to AMs. (tucu)
+
+    YARN-1381. Same relaxLocality appears twice in exception message of
+    AMRMClientImpl#checkLocalityRelaxationConflict() (Ted Yu via Sandy Ryza)
+
+    YARN-1407. RM Web UI and REST APIs should uniformly use
+    YarnApplicationState (Sandy Ryza)
+
+    YARN-1438. Ensure container diagnostics includes exception from container
+    launch. (stevel via acmurthy)
+
+    YARN-1138. yarn.application.classpath is set to point to $HADOOP_CONF_DIR
+    etc., which does not work on Windows. (Chuan Liu via cnauroth)
+
+    YARN-461. Fair scheduler should not accept apps with empty string queue name. 
+    (ywskycn via tucu)
+
+    YARN-1060. Two tests in TestFairScheduler are missing @Test annotation
+    (Niranjan Singh via Sandy Ryza)
+
+    YARN-1188. The context of QueueMetrics becomes default when using
+    FairScheduler (Tsuyoshi Ozawa via Sandy Ryza)
+
+    YARN-1268. TestFairScheduler.testContinuousScheduling is flaky (Sandy Ryza)
+
+    YARN-1300. SLS tests fail because conf puts YARN properties in
+    fair-scheduler.xml (Ted Yu via Sandy Ryza)
+
+    YARN-1183. MiniYARNCluster shutdown takes several minutes intermittently
+    (Andrey Klochkov via jeagles)
+
+    YARN-1305. RMHAProtocolService#serviceInit should handle HAUtil's
+    IllegalArgumentException (Tsuyoshi Ozawa via bikas)
+
+    YARN-1374. Changed ResourceManager to start the preemption policy monitors
+    as active services. (Karthik Kambatla via vinodkv)
+
+    YARN-1395. Distributed shell application master launched with debug flag can
+    hang waiting for external ls process. (cnauroth)
+
+    YARN-1400. yarn.cmd uses HADOOP_RESOURCEMANAGER_OPTS. Should be
+    YARN_RESOURCEMANAGER_OPTS. (Raja Aluri via cnauroth)
+
+    YARN-1401. With zero sleep-delay-before-sigkill.ms, no signal is ever sent
+    (Gera Shegalov via Sandy Ryza)
+
+    YARN-1411. HA config shouldn't affect NodeManager RPC addresses (Karthik
+    Kambatla via bikas)
+
+    YARN-1419. TestFifoScheduler.testAppAttemptMetrics fails intermittently
+    under jdk7 (Jonathan Eagles via jlowe)
+
+    YARN-744. Race condition in ApplicationMasterService.allocate .. It might
+    process same allocate request twice resulting in additional containers
+    getting allocated. (Omkar Vinit Joshi via bikas)
+
+    YARN-1425. TestRMRestart fails because MockRM.waitForState(AttemptId) uses
+    current attempt instead of the attempt passed as argument (Omkar Vinit
+    Joshi via bikas)
+
+    YARN-1053. Diagnostic message from ContainerExitEvent is ignored in
+    ContainerImpl (Omkar Vinit Joshi via bikas)
+
+    YARN-1320. Fixed Distributed Shell application to respect custom log4j
+    properties file. (Xuan Gong via vinodkv)
+
+    YARN-1416. Fixed a few invalid transitions in RMApp, RMAppAttempt and in some
+    tests. (Jian He via vinodkv)
+
+    YARN-895. Changed RM state-store to not crash immediately if RM restarts while
+    the state-store is down. (Jian He via vinodkv)
+
+    YARN-1454. Fixed test failure issue with TestRMRestart. (Karthik Kambatla
+    via vinodkv)
+
+    YARN-1450. Fixed test failure in TestUnmanagedAMLauncher by removing its
+    dependency on distributed-shell. (Binglin Chang via vinodkv)
+
+    YARN-1405. Fixed ResourceManager to not hang when init/start fails with an
+    exception w.r.t state-store. (Jian He via vinodkv)
+
+    YARN-1505. Fixed Webapplication proxy server to not hardcode its bind
+    address. (Xuan Gong via vinodkv)
+
+    YARN-1145. Fixed a potential file-handle leak in the web interface for
+    displaying aggregated logs. (Rohith Sharma via vinodkv)
+
+    YARN-1451. TestResourceManager relies on the scheduler assigning multiple
+    containers in a single node update. (Sandy Ryza via kasha)
+
+    YARN-1527. Fix yarn rmadmin command to print the correct usage info.
+    (Akira AJISAKA via jianhe)
+
+    YARN-1522. Fixed a race condition in the test TestApplicationCleanup that was
+    causing it to randomly fail. (Liyin Liang via vinodkv)
+
+    YARN-1549. Fixed a bug in ResourceManager's ApplicationMasterService that
+    was causing unamanged AMs to not finish correctly. (haosdent via vinodkv)
+
+    YARN-1559. Race between ServerRMProxy and ClientRMProxy setting 
+    RMProxy#INSTANCE. (kasha and vinodkv via kasha)
+
+    YARN-1560. Fixed TestYarnClient#testAMMRTokens failure with null AMRM token.
+    (Ted Yu via jianhe)
+
+    YARN-1409. NonAggregatingLogHandler can throw RejectedExecutionException
+    (Tsuyoshi OZAWA via jlowe)
+
+    YARN-1293. Fixed TestContainerLaunch#testInvalidEnvSyntaxDiagnostics failure
+    caused by non-English system locale. (Tsuyoshi OZAWA via jianhe)
+
+    YARN-1574. RMDispatcher should be reset on transition to standby. (Xuan Gong
+    via kasha)
+
+    YARN-1598. HA-related rmadmin commands don't work on a secure cluster (kasha)
+
+    YARN-1603. Remove two *.orig files which were unexpectedly committed. 
+    (Zhijie Shen via junping_du)
+
+    YARN-1601. 3rd party JARs are missing from hadoop-dist output. (tucu)
+
+    YARN-1351. Invalid string format in Fair Scheduler log warn message
+    (Konstantin Weitz via Sandy Ryza)
+
+    YARN-1608. LinuxContainerExecutor has a few DEBUG messages at INFO level
+    (kasha)
+
+    YARN-1606. Fix the default value of yarn.resourcemanager.zk-timeout-ms 
+    in yarn-default.xml (kasha)
+
+    YARN-1607. TestRM relies on the scheduler assigning multiple containers in
+    a single node update (Sandy Ryza)
+
+    YARN-1575. Public localizer crashes with "Localized unkown resource"
+    (jlowe)
+
+    YARN-1629. IndexOutOfBoundsException in MaxRunningAppsEnforcer (Sandy Ryza)
+
+    YARN-1628. Fixed the test failure in TestContainerManagerSecurity. (Vinod
+    Kumar Vavilapalli via zjshen)
+
+Release 2.2.0 - 2013-10-13
+
+  INCOMPATIBLE CHANGES
+  
+    YARN-1229. Define constraints on Auxiliary Service names. Change
+    ShuffleHandler service name from mapreduce.shuffle to
+    mapreduce_shuffle (Xuan Gong via sseth)
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-1246. Added application finish-status to ApplicationSummary for the sake
+    of testing given ApplicationHistoryServer is not yet ready. (Arpit Gupta via
+    vinodkv)
+
+    YARN-899. Added back queue level administrator-acls so that there is no
+    regression w.r.t 1.x. (Xuan Gong via vinodkv)
+
+    YARN-1228. Clean up Fair Scheduler configuration loading. (Sandy Ryza)
+
+    YARN-1213. Restore config to ban submitting to undeclared pools in the
+    Fair Scheduler. (Sandy Ryza)
+
+    YARN-1277. Added a policy based configuration for http/https in common
+    HttpServer and using the same in YARN - related to per project https config
+    support via HADOOP-10022. (Suresh Srinivas and Omkar Vinit Joshi via vinodkv)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-1128. FifoPolicy.computeShares throws NPE on empty list of Schedulables
+    (Karthik Kambatla via Sandy Ryza)
+
+    YARN-1214. Register ClientToken MasterKey in SecretManager after it is
+    saved (Jian He via bikas)
+
+    YARN-49. Improve distributed shell application to work on a secure cluster.
+    (Vinod Kumar Vavilapalli via hitesh)
+
+    YARN-1157. Fixed ResourceManager UI to behave correctly when apps like
+    distributed-shell do not set tracking urls. (Xuan Gong via vinodkv)
+
+    YARN-1221. With Fair Scheduler, reserved MB reported in RM web UI increases
+    indefinitely (Siqi Li via Sandy Ryza)
+
+    YARN-1247. test-container-executor has gotten out of sync with the changes to
+    container-executor. (rvs via tucu)
+
+    YARN-1070. Fixed race conditions in NodeManager during container-kill.
+    (Zhijie Shen via vinodkv)
+
+    YARN-1215. Yarn URL should include userinfo. (Chuan Liu via cnauroth)
+
+    YARN-1262. TestApplicationCleanup relies on all containers assigned in a
+    single heartbeat (Karthik Kambatla via Sandy Ryza)
+
+    YARN-1260. Added webapp.http.address to yarn-default.xml so that default
+    install with https enabled doesn't have broken link on NM UI. (Omkar Vinit
+    Joshi via vinodkv)
+
+    YARN-1141. Updating resource requests should be decoupled with updating
+    blacklist (Zhijie Shen via bikas)
+
+    YARN-876. Node resource is added twice when node comes back from unhealthy
+    to healthy. (Peng Zhang via Sandy Ryza)
+
+    YARN-890. Ensure CapacityScheduler doesn't round-up metric for available 
+    resources. (Xuan Gong & Hitesh Shah via acmurthy)
+
+    YARN-621. Changed YARN web app to not add paths that can cause duplicate
+    additions of authenticated filters there by causing kerberos replay errors.
+    (Omkar Vinit Joshi via vinodkv)
+
+    YARN-1236. FairScheduler setting queue name in RMApp is not working.
+    (Sandy Ryza)
+
+    YARN-1256. NM silently ignores non-existent service in
+    StartContainerRequest (Xuan Gong via bikas)
+
+    YARN-1149. NM throws InvalidStateTransitonException: Invalid event:
+    APPLICATION_LOG_HANDLING_FINISHED at RUNNING (Xuan Gong via hitesh)
+
+    YARN-1271. "Text file busy" errors launching containers again
+    (Sandy Ryza)
+
+    YARN-1131. $yarn logs command should return an appropriate error message if
+    YARN application is still running. (Siddharth Seth via hitesh)
+
+    YARN-1219. FSDownload changes file suffix making FileUtil.unTar() throw
+    exception. (Shanyu Zhao via cnauroth)
+
+    YARN-1251. TestDistributedShell#TestDSShell failed with timeout. (Xuan Gong
+    via hitesh)
+
+    YARN-1167. Fixed Distributed Shell to not incorrectly show empty hostname
+    on RM UI. (Xuan Gong via vinodkv)
+
+    YARN-1254. Fixed NodeManager to not pollute container's credentials. (Omkar
+    Vinit Joshi via vinodkv)
+
+    YARN-1273. Fixed Distributed-shell to account for containers that failed
+    to start. (Hitesh Shah via vinodkv)
+
+    YARN-1032. Fixed NPE in RackResolver. (Lohit Vijayarenu via acmurthy)
+
+    YARN-1090. Fixed CS UI to better reflect applications as non-schedulable
+    and not as pending. (Jian He via acmurthy)
+
+    YARN-1274. Fixed NodeManager's LinuxContainerExecutor to create user, app-dir
+    and log-dirs correctly even when there are no resources to localize for the
+    container. (Siddharth Seth via vinodkv)
+
+    YARN-1278. Fixed NodeManager to not delete local resources for apps on resync
+    command from RM - a bug caused by YARN-1149. (Hitesh Shah via vinodkv)
+
+    YARN-1463. Tests should avoid starting http-server where possible or creates 
+    spnego keytab/principals (vinodkv via kasha)
+
+Release 2.1.1-beta - 2013-09-23
+
+  INCOMPATIBLE CHANGES
+
+    YARN-707. Added user information also in the YARN ClientToken so that AMs
+    can implement authorization based on incoming users. (Jason Lowe via vinodkv)
+
+    YARN-1170. YARN & MapReduce proto definitions fixed to specify protobuf
+    package as hadoop.yarn and hadoop.mapreduce respectively. (Binglin Chang
+    via acmurthy)
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-589. Expose a REST API for monitoring the fair scheduler (Sandy Ryza).
+
+    YARN-1074. Cleaned up YARN CLI application list to only display running
+    applications by default. (Xuan Gong via vinodkv)
+    
+    YARN-1093. Corrections to Fair Scheduler documentation (Wing Yew Poon via
+    Sandy Ryza)
+
+    YARN-942. In Fair Scheduler documentation, inconsistency on which
+    properties have prefix (Akira Ajisaka via Sandy Ryza)
+
+    YARN-1083. Changed ResourceManager to fail when the expiry interval is less
+    than the configured node-heartbeat interval. (Zhijie Shen via vinodkv)
+
+    YARN-1081. Made a trivial change to YARN node CLI header to avoid potential
+    confusion. (Akira AJISAKA via vinodkv)
+
+    YARN-1034. Remove "experimental" in the Fair Scheduler documentation.
+    (Karthik Kambatla via Sandy Ryza)
+
+    YARN-1080. Improved help message for "yarn logs" command. (Xuan Gong via
+    vinodkv)
+
+    YARN-771. AMRMClient support for resource blacklisting (Junping Du via
+    bikas)
+
+    YARN-1117. Improved help messages for "yarn application" and "yarn node"
+    commands. (Xuan Gong via vinodkv)
+
+    YARN-1120. Made ApplicationConstants.Environment.USER definition OS neutral
+    as the corresponding value is now set correctly end-to-end. (Chuan Liu via
+    vinodkv)
+
+    YARN-1124. Modified YARN CLI application list to display new and submitted
+    applications together with running apps by default, following up YARN-1074.
+    (Xuan Gong via vinodkv)
+
+    YARN-1065. NM should provide AuxillaryService data to the container (Xuan
+    Gong via bikas)
+
+    YARN-758. Augment MockNM to use multiple cores (Karthik Kambatla via
+    Sandy Ryza)
+
+    YARN-696. Changed RMWebservice apps call to take in multiple application
+    states. (Trevor Lorimer via vinodkv)
+
+    YARN-910. Augmented auxiliary services to listen for container starts and
+    completions in addition to application events. (Alejandro Abdelnur via
+    vinodkv)
+
+    YARN-1137. Add support whitelist for system users to Yarn 
+    container-executor.c. (rvs via tucu)
+
+    YARN-1001. Added a web-service to get statistics about per application-type
+    per state for consumption by downstream projects. (Zhijie Shen via vinodkv)
+
+    YARN-1203. Changed YARN web-app proxy to handle http and https URLs from
+    AM registration and finish correctly. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-1204. Added separate configuration properties for https for RM and NM
+    without which servers enabled with https will also start on http ports.
+    (Omkar Vinit Joshi via vinodkv)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-948. Changed ResourceManager to validate the release container list
+    before actually releasing them. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-966. Fixed ContainerLaunch to not fail quietly when there are no
+    localized resources due to some other failure. (Zhijie Shen via vinodkv)
+
+    YARN-502. Fixed a state machine issue with RMNode inside ResourceManager
+    which was crashing scheduler. (Mayank Bansal via vinodkv)
+
+    YARN-573. Shared data structures in Public Localizer and Private Localizer
+    are not Thread safe. (Omkar Vinit Joshi via jlowe)
+
+    YARN-903. Changed ContainerManager to suppress unnecessary warnings when
+    stopping already stopped containers. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-906. Fixed a bug in NodeManager where cancelling ContainerLaunch at
+    KILLING state causes that the container to hang. (Zhijie Shen via vinodkv)
+
+    YARN-994. HeartBeat thread in AMRMClientAsync does not handle runtime
+    exception correctly (Xuan Gong via bikas)
+
+    YARN-337. RM handles killed application tracking URL poorly (jlowe)
+
+    YARN-107. Fixed ResourceManager and clients to better handle
+    forceKillApplication on non-running and finished applications. (Xuan Gong
+    via vinodkv)
+
+    YARN-643. Fixed ResourceManager to remove all tokens consistently on app
+    finish. (Xuan Gong via vinodkv)
+
+    YARN-1006. Fixed broken rendering in the Nodes list web page on the RM web
+    UI. (Xuan Gong via vinodkv)
+
+    YARN-881. Priority#compareTo method seems to be wrong. (Jian He via bikas)
+
+    YARN-1082. Create base directories on HDFS after RM login to ensure RM
+    recovery doesn't fail in secure mode. (vinodkv via acmurthy)
+
+    YARN-1085. Modified YARN and MR2 web-apps to do HTTP authentication in
+    secure setup with kerberos. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-1094. Fixed a blocker with RM restart code because of which RM crashes
+    when try to recover an existing app. (vinodkv)
+
+    YARN-1008. MiniYARNCluster with multiple nodemanagers, all nodes have same 
+    key for allocations. (tucu)
+
+    YARN-981. Fixed YARN webapp so that /logs servlet works like before. (Jian He
+    via vinodkv)
+
+    YARN-602. Fixed NodeManager to not let users override some mandatory 
+    environmental variables. (Kenji Kikushima  via vinodkv)
+
+    YARN-1101. Active nodes can be decremented below 0 (Robert Parker 
+    via tgraves)
+
+    YARN-1077. Fixed TestContainerLaunch test failure on Windows. (Chuan Liu via
+    vinodkv)
+
+    YARN-957. Fixed a bug in CapacityScheduler because of which requests that
+    need more than a node's total capability were incorrectly allocated on that
+    node causing apps to hang. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-1107. Fixed a bug in ResourceManager because of which RM in secure mode
+    fails to restart. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-1049. ContainerExistStatus should define a status for preempted 
+    containers. (tucu)
+
+    YARN-1144. Unmanaged AMs registering a tracking URI should not be 
+    proxy-fied. (tucu)
+
+    YARN-1152. Fixed a bug in ResourceManager that was causing clients to get
+    invalid client token key errors when an appliation is about to finish.
+    (Jason Lowe via vinodkv)
+
+    YARN-292. Fixed FifoScheduler and FairScheduler to make their applications
+    data structures thread safe to avoid RM crashing with
+    ArrayIndexOutOfBoundsException. (Zhijie Shen via vinodkv)
+
+    YARN-1025. ResourceManager and NodeManager do not load native libraries on
+    Windows. (cnauroth)
+
+    YARN-1176. RM web services ClusterMetricsInfo total nodes doesn't include 
+    unhealthy nodes (Jonathan Eagles via tgraves)
+
+    YARN-1078. TestNodeManagerResync, TestNodeManagerShutdown, and
+    TestNodeStatusUpdater fail on Windows. (Chuan Liu via cnauroth)
+
+    YARN-1194. TestContainerLogsPage fails with native builds (Roman Shaposhnik
+    via jlowe)
+
+    YARN-1116. Populate AMRMTokens back to AMRMTokenSecretManager after RM
+    restarts (Jian He via bikas)
+
+    YARN-1189. NMTokenSecretManagerInNM is not being told when applications
+    have finished (Omkar Vinit Joshi via jlowe)
+
+    YARN-540. Race condition causing RM to potentially relaunch already
+    unregistered AMs on RM restart (Jian He via bikas)
+
+    YARN-1184. ClassCastException during preemption enforcement. (cdouglas)
+
+Release 2.1.0-beta - 2013-08-22
+
+  INCOMPATIBLE CHANGES
+
+    YARN-396. Rationalize AllocateResponse in RM Scheduler API. (Zhijie Shen
+    via hitesh)
+
+    YARN-439. Flatten NodeHeartbeatResponse. (Xuan Gong via sseth)
+
+    YARN-440. Flatten RegisterNodeManagerResponse. (Xuan Gong via sseth)
+
+    YARN-536. Removed the unused objects ContainerStatus and ContainerStatus from
+    Container which also don't belong to the container. (Xuan Gong via vinodkv)
+
+    YARN-486. Changed NM's startContainer API to accept Container record given by
+    RM as a direct parameter instead of as part of the ContainerLaunchContext
+    record. (Xuan Gong via vinodkv)
+
+    YARN-444. Moved special container exit codes from YarnConfiguration to API
+    where they belong. (Sandy Ryza via vinodkv)
+
+    YARN-441. Removed unused utility methods for collections from two API
+    records. (Xuan Gong via vinodkv)
+
+    YARN-561. Modified NodeManager to set key information into the environment
+    of every container that it launches. (Xuan Gong via vinodkv)
+
+    YARN-579. Stop setting the Application Token in the AppMaster env, in
+    favour of the copy present in the container token field. 
+    (Vinod Kumar Vavilapalli via sseth)
+
+    YARN-629. Make YarnRemoteException not be rooted at IOException. (Xuan Gong
+    via vinodkv)
+
+    YARN-633. Changed RMAdminProtocol api to throw IOException and
+    YarnRemoteException. (Xuan Gong via vinodkv)
+
+    YARN-632. Changed ContainerManager api to throw IOException and
+    YarnRemoteException. (Xuan Gong via vinodkv)
+
+    YARN-631. Changed ClientRMProtocol api to throw IOException and
+    YarnRemoteException. (Xuan Gong via vinodkv)
+
+    YARN-630. Changed AMRMProtocol api to throw IOException and
+    YarnRemoteException. (Xuan Gong via vinodkv)
+
+    YARN-615. Rename ContainerLaunchContext.containerTokens to tokens.
+    (Vinod Kumar Vavilapalli via sseth)
+
+    YARN-571. Remove user from ContainerLaunchContext. (Omkar Vinit Joshi via
+    vinodkv)
+
+    YARN-716. Making ApplicationID immutable. (Siddharth Seth via vinodkv)
+
+    YARN-684. ContainerManager.startContainer should use
+    ContainerTokenIdentifier instead of the entire Container.
+    (Vinod Kumar Vavilapalli via sseth)
+
+    YARN-735. Make ApplicationAttemptId, ContaienrId and NodeId immutable.
+    (Jian He via sseth)
+
+    YARN-749. Rename ResourceRequest.(get,set)HostName to
+    ResourceRequest.(get,set)ResourceName. (acmurthy)
+
+    YARN-720. container-log4j.properties should not refer to mapreduce
+    property names. (Zhijie Shen via sseth)
+
+    YARN-748. Moved BuilderUtils from yarn-common to yarn-server-common for
+    eventual retirement. (Jian He via vinodkv)
+
+    YARN-635. Renamed YarnRemoteException to YarnException. (Siddharth Seth via
+    vinodkv)
+
+    YARN-755. Renamed AllocateResponse.reboot to AllocateResponse.resync. (Bikas
+    Saha via vinodkv)
+
+    YARN-753. Added individual factory methods for all api protocol records and
+    converted the records to be abstract classes. (Jian He via vinodkv)
+
+    YARN-724. Moved ProtoBase from api.records to api.records.impl.pb. (Jian He
+    via vinodkv)
+
+    YARN-759. Create Command enum in AllocateResponse (bikas)
+
+    YARN-777. Removed unreferenced objects from .proto files. (Jian He via
+    vinodkv) 
+
+    YARN-642. Removed health parameter from ResourceManager /nodes web-service
+    and cleaned the behaviour of the status parameter. (Sandy Ryza vid vinodkv)
+
+    YARN-530. Defined Service model strictly, implemented AbstractService for
+    robust subclassing and migrated yarn-common services. (Steve Loughran via
+    vinodkv)
+
+    YARN-746. Renamed Service.register() and Service.unregister() to
+    registerServiceListener() & unregisterServiceListener() respectively.
+    (Steve Loughran via vinodkv)
+
+    YARN-792. Moved NodeHealthStatus from yarn.api.record to
+    yarn.server.api.record. (Jian He via vinodkv)
+
+    YARN-806. Moved ContainerExitStatus from yarn.api to yarn.api.records. (Jian
+    He via vinodkv)
+
+    YARN-821. Renamed setFinishApplicationStatus to setFinalApplicationStatus in
+    FinishApplicationMasterRequest for consistency. (Jian He via vinodkv)
+
+    YARN-787. Removed minimum resource from RegisterApplicationMasterResponse.
+    (tucu via acmurthy)
+
+    YARN-829. Renamed RMTokenSelector to be RMDelegationTokenSelector. (Zhijie
+    Shen via vinodkv)
+
+    YARN-828. Removed the unsed YarnVersionAnnotation. (Zhijie Shen via vinodkv)
+
+    YARN-823. Moved RMAdmin from yarn.client to yarn.client.cli and renamed it to
+    be RMAdminCLI. (Jian He via vinodkv)
+
+    YARN-387. Renamed YARN protocols for consistency.
+    ClientRMProtocol -> ApplicationClientProtocol
+    AMRMProtocol -> ApplicationMasterProtocol
+    ContainerManager -> ContainerManagementProtocol
+    (vinodkv via acmurthy)
+
+    YARN-831. Removed minimum resource from GetNewApplicationResponse as a
+    follow-up to YARN-787. (Jian He via acmurthy)
+
+    YARN-824. Added static factory methods to hadoop-yarn-client interfaces. 
+    (Jian He via acmurthy)
+
+    YARN-826. Moved Clock and SystemClock into yarn.util package. (Zhijie Shen
+    via vinodkv)
+
+    YARN-837. Moved yarn.ClusterInfo into MapReduce project as it doesn't belong
+    to YARN. (Zhijie Shen via vinodkv)
+
+    YARN-822. Renamed ApplicationToken to be AMRMToken, and similarly the
+    corresponding TokenSelector and SecretManager. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-610. ClientToken is no longer set in the environment of the Containers.
+    (Omkar Vinit Joshi via vinodkv)
+
+    YARN-834. Fixed annotations for yarn-client module, reorganized packages and
+    clearly differentiated *Async apis. (Arun C Murthy and Zhijie Shen via
+    vinodkv)
+
+    YARN-840. Moved ProtoUtils to yarn.api.records.pb.impl. (Jian He via
+    acmurthy) 
+
+    YARN-841. Move Auxiliary service to yarn-api, annotate and document it.
+    (vinodkv)
+
+    YARN-850. Rename getClusterAvailableResources to getAvailableResources in
+    AMRMClients (Jian He via bikas)
+
+    YARN-694. Starting to use NMTokens to authenticate all communication with
+    NodeManagers. (Omkar Vinit Joshi via vinodkv) 
+
+    YARN-553. Replaced YarnClient.getNewApplication with
+    YarnClient.createApplication which provides a directly usable
+    ApplicationSubmissionContext to simplify the api. (Karthik Kambatla via
+    acmurthy) 
+
+    YARN-851. Share NMTokens using NMTokenCache (api-based) between AMRMClient
+    and NMClient instead of memory based approach which is used currently. (Omkar
+    Vinit Joshi via vinodkv)
+
+    YARN-869. Move ResourceManagerAdministrationProtocol out of main YARN api.
+    (vinodkv via acmurthy)
+
+    YARN-791. Changed RM APIs and web-services related to nodes to ensure that
+    both are consistent with each other. (Sandy Ryza via vinodkv)
+
+    YARN-727. ClientRMProtocol.getAllApplications should accept ApplicationType as
+    a parameter. (Xuan Gong via hitesh)
+
+    YARN-701. Use application tokens irrespective of secure or non-secure
+    mode. (vinodkv via acmurthy)
+
+    YARN-918. Remove ApplicationAttemptId from
+    RegisterApplicationMasterRequestProto. (vinodkv via acmurthy)
+
+    YARN-926. Modified ContainerManagerProtcol APIs to take in requests for
+    multiple containers. (Jian He via vinodkv)
+
+  NEW FEATURES
+
+    YARN-482. FS: Extend SchedulingMode to intermediate queues. 
+    (kkambatl via tucu)
+
+    YARN-45. Add protocol for schedulers to request containers back from
+    ApplicationMasters. (Carlo Curino, cdouglas)
+
+    YARN-563. Add the concept of an application-type for each application.
+    (Mayank Bansal via vinodkv)
+
+    HADOOP-8562. Enhancements to support Hadoop on Windows Server and Windows
+    Azure environments. (See breakdown of tasks below for subtasks and
+    contributors)
+
+    YARN-422. Add a NM Client library to help application-writers. (Zhijie Shen
+    via vinodkv)
+
+    YARN-392. Make it possible to specify hard locality constraints in resource
+    requests. (sandyr via tucu)
+
+    YARN-326. Add multi-resource scheduling to the fair scheduler. 
+    (sandyr via tucu)
+
+    YARN-398. Make it possible to specify hard locality constraints in resource
+    requests for CapacityScheduler. (acmurthy)
+
+    YARN-781. Exposing LOGDIR in all containers' environment which should be used
+    by containers for logging purposes. (Jian He via vinodkv)
+
+  IMPROVEMENTS
+
+    YARN-347. Node CLI should show CPU info besides memory in node status.
+    (Junping Du via llu)
+
+    YARN-365. Change NM heartbeat handling to not generate a scheduler event
+    on each heartbeat. (Xuan Gong via sseth)
+
+    YARN-380. Fix yarn node -status output to be better readable. (Omkar Vinit
+    Joshi via vinodkv)
+
+    YARN-410. Fixed RM UI so that the new lines diagnostics for a failed app on
+    the per-application page are translated to html line breaks. (Omkar Vinit
+    Joshi via vinodkv)
+
+    YARN-198. Added a link to RM pages from the NodeManager web app. (Jian He
+    via vinodkv)
+
+    YARN-237. Refreshing the RM page forgets how many rows I had in my
+    Datatables (jian he via bobby)
+
+    YARN-481. Add AM Host and RPC Port to ApplicationCLI Status Output 
+    (Chris Riccomini via bikas)
+
+    YARN-297. Improve hashCode implementations for PB records. (Xuan Gong via
+    hitesh)
+
+    YARN-417. Create AMRMClient wrapper that provides asynchronous callbacks.
+    (Sandy Ryza via bikas)
+
+    YARN-497. Yarn unmanaged-am launcher jar does not define a main class in
+    its manifest (Hitesh Shah via bikas)
+
+    YARN-469. Make scheduling mode in FS pluggable. (kkambatl via tucu)
+
+    YARN-450. Define value for * in the scheduling protocol (Zhijie Shen via
+    bikas)
+
+    YARN-475. Remove a unused constant in the public API -
+    ApplicationConstants.AM_APP_ATTEMPT_ID_ENV. (Hitesh Shah via vinodkv)
+
+    YARN-309. Changed NodeManager to obtain heart-beat interval from the
+    ResourceManager. (Xuan Gong via vinodkv)
+
+    YARN-447. Move ApplicationComparator in CapacityScheduler to use comparator
+    in ApplicationId. (Nemon Lou via vinodkv)
+
+    YARN-381. Improve fair scheduler docs. (Sandy Ryza via tomwhite)
+
+    YARN-458. YARN daemon addresses must be placed in many different configs. 
+    (sandyr via tucu)
+
+    YARN-193. Scheduler.normalizeRequest does not account for allocation
+    requests that exceed maximumAllocation limits (Zhijie Shen via bikas)
+
+    YARN-479. NM retry behavior for connection to RM should be similar for
+    lost heartbeats (Jian He via bikas)
+
+    YARN-495. Changed NM reboot behaviour to be a simple resync - kill all
+    containers  and re-register with RM. (Jian He via vinodkv)
+
+    YARN-514. Delayed store operations should not result in RM unavailability
+    for app submission (Zhijie Shen via bikas)
+
+    YARN-586. Fixed a typo in ApplicationSubmissionContext#setApplicationId.
+    (Zhijie Shen via vinodkv)
+
+    YARN-542. Changed the default global AM max-attempts value to be not one.
+    (Zhijie Shen via vinodkv)
+
+    YARN-583. Moved application level local resources to be localized under the
+    filecache sub-directory under application directory. (Omkar Vinit Joshi via
+    vinodkv)
+
+    YARN-581. Added a test to verify that app delegation tokens are restored
+    after RM restart. (Jian He via vinodkv)
+
+    YARN-577. Add application-progress also to ApplicationReport. (Hitesh Shah
+    via vinodkv)
+
+    YARN-595. Refactor fair scheduler to use common Resources. (Sandy Ryza
+    via tomwhite)
+
+    YARN-562. Modified NM to reject any containers allocated by a previous
+    ResourceManager. (Jian He via vinodkv)
+
+    YARN-591. Moved RM recovery related records out of public API as they do not
+    belong there. (vinodkv)
+
+    YARN-599. Refactoring submitApplication in ClientRMService and RMAppManager
+    to separate out various validation checks depending on whether they rely on
+    RM configuration or not. (Zhijie Shen via vinodkv)
+
+    YARN-618. Modified RM_INVALID_IDENTIFIER to be -1 instead of zero. (Jian He
+    via vinodkv)
+
+    YARN-625. Move the utility method unwrapAndThrowException from
+    YarnRemoteExceptionPBImpl to RPCUtil. (Siddharth Seth via vinodkv)
+
+    YARN-645. Moved RMDelegationTokenSecretManager from yarn-server-common to
+    yarn-server-resourcemanager where it really belongs. (Jian He via vinodkv)
+
+    YARN-651. Changed PBClientImpls of ContainerManager and RMAdmin to throw
+    IOExceptions also. (Xuan Gong via vinodkv)
+
+    YARN-582. Changed ResourceManager to recover Application token and client
+    tokens for app attempt so that RM can be restarted while preserving current
+    applications. (Jian He via vinodkv)
+
+    YARN-568. Add support for work preserving preemption to the FairScheduler.
+    (Carlo Curino and Sandy Ryza via cdouglas)
+
+    YARN-598. Add virtual cores to queue metrics. (sandyr via tucu)
+
+    YARN-634. Modified YarnRemoteException to be not backed by PB and introduced
+    a separate SerializedException record. (Siddharth Seth via vinodkv)
+
+    YARN-663. Changed ResourceTracker API and LocalizationProtocol API to throw
+    YarnRemoteException and IOException. (Xuan Gong via vinodkv)
+
+    YARN-590. Added an optional mesage to be returned by ResourceMaanger when RM
+    asks an RM to shutdown/resync etc so that NMs can log this message locally
+    for better debuggability. (Mayank Bansal via vinodkv)
+
+    YARN-617. Made ContainerTokens to be used for validation at NodeManager
+    also in unsecure mode to prevent AMs from faking resource requirements in
+    unsecure mode. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-708. Moved RecordFactory classes to hadoop-yarn-api, and put some
+    miscellaneous fixes to the interfaces. (Siddharth Seth via vinodkv)
+
+    YARN-711. Copied BuilderUtil methods in individual API records as
+    BuilderUtils is going to be dismantled. (Jian He via vinodkv)
+
+    YARN-714. Added NMTokens to be sent to AMs as part of heart-beat response.
+    (Omkar Vinit Joshi via vinodkv)
+
+    YARN-638. Modified ResourceManager to restore RMDelegationTokens after
+    restarting. (Jian He via vinodkv)
+
+    YARN-660. Improve AMRMClient with matching requests (bikas)
+
+    YARN-717. Put object creation factories for Token in the class itself and
+    remove useless derivations for specific tokens. (Jian He via vinodkv)
+
+    YARN-756. Move Preemption* records to yarn.api where they really belong.
+    (Jian He via vinodkv)
+
+    YARN-750. Allow for black-listing resources in YARN API and Impl in CS
+    (acmurthy via bikas)
+
+    YARN-877. Support resource blacklisting for FifoScheduler.
+    (Junping Du via llu)
+
+    YARN-686. Flatten NodeReport. (sandyr via tucu)
+
+    YARN-737. Throw some specific exceptions directly instead of wrapping them
+    in YarnException. (Jian He via sseth)
+
+    YARN-731. RPCUtil.unwrapAndThrowException should unwrap remote
+    RuntimeExceptions. (Zhijie Shen via sseth)
+
+    YARN-600. Hook up cgroups CPU settings to the number of virtual cores 
+    allocated. (sandyr via tucu)
+
+    YARN-648. FS: Add documentation for pluggable policy. (kkambatl via tucu)
+
+    YARN-773. Moved YarnRuntimeException from package api.yarn to
+    api.yarn.exceptions. (Jian He via vinodkv)
+
+    YARN-692. Creating NMToken master key on RM and sharing it with NM as a part
+    of RM-NM heartbeat. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-782. vcores-pcores ratio functions differently from vmem-pmem ratio in 
+    misleading way. (sandyr via tucu)
+
+    YARN-803. factor out scheduler config validation from the ResourceManager 
+    to each scheduler implementation. (tucu)
+
+    YARN-789. Enable zero capabilities resource requests in fair scheduler. 
+    (tucu)
+
+    YARN-639. Modified Distributed Shell application to start using the new
+    NMClient library. (Zhijie Shen via vinodkv)
+
+    YARN-693. Modified RM to send NMTokens on allocate call so that AMs can then
+    use them for authentication with NMs. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-752. In AMRMClient, automatically add corresponding rack requests for 
+    requested nodes. (sandyr via tucu)
+
+    YARN-825. Fixed javadoc and annotations for yarn-common module. (vinodkv)
+
+    YARN-833. Moved Graph and VisualizeStateMachine into yarn.state package.
+    (Zhijie Shen via vinodkv)
+
+    YARN-805. Fix javadoc and annotations on classes in the yarn-api
+    package. (Jian He via sseth)
+
+    YARN-846.  Move pb Impl classes from yarn-api to yarn-common. (Jian He via
+    vinodkv)
+
+    YARN-827. Need to make Resource arithmetic methods accessible (Jian He via
+    bikas)
+
+    YARN-866. Add test for class ResourceWeights. (ywskycn via tucu)
+
+    YARN-736. Add a multi-resource fair sharing metric. (sandyr via tucu)
+
+    YARN-883. Expose Fair Scheduler-specific queue metrics. (sandyr via tucu)
+
+    YARN-569. Add support for requesting and enforcing preemption requests via
+    a capacity monitor. (Carlo Curino, cdouglas)
+
+    YARN-521. Augment AM - RM client module to be able to request containers
+    only at specific locations (Sandy Ryza via bikas)
+
+    YARN-513. Create common proxy client for communicating with RM. (Xuan Gong
+    & Jian He via bikas)
+
+    YARN-927. Change ContainerRequest to not have more than 1 container count
+    and remove StoreContainerRequest (bikas)
+
+    YARN-922. Change FileSystemRMStateStore to use directories (Jian He via
+    bikas)
+
+    YARN-865. RM webservices can't query based on application Types. (Xuan Gong
+    via hitesh)
+
+    YARN-912. Move client facing exceptions to yarn-api module. (Mayank Bansal
+    via vinodkv)
+
+    YARN-84. Use Builder to build RPC server. (Brandon Li via suresh)
+
+    YARN-1046. Disable mem monitoring by default in MiniYARNCluster. (Karthik
+    Kambatla via Sandy Ryza)
+
+    YARN-1045. Improve toString implementation for PBImpls. (Jian He via sseth)  
+
+  OPTIMIZATIONS
+
+    YARN-512. Log aggregation root directory check is more expensive than it
+    needs to be. (Maysam Yabandeh via jlowe)
+
+    YARN-719. Move RMIdentifier from Container to ContainerTokenIdentifier.
+    (Vinod Kumar Vavilapalli via sseth)
+
+  BUG FIXES
+
+    YARN-383. AMRMClientImpl should handle null rmClient in stop()
+    (Hitesh Shah via sseth)
+
+    YARN-385. Add missing fields - location and #containers to
+    ResourceRequestPBImpl's toString(). (Sandy Ryza via sseth)
+
+    YARN-377. Use the new StringUtils methods added by HADOOP-9252 and fix
+    TestContainersMonitor.  (Chris Nauroth via szetszwo)
+
+    YARN-391. Formatting fixes for LCEResourceHandler classes.
+    (Steve Loughran via sseth)
+
+    YARN-390. ApplicationCLI and NodeCLI hard-coded platform-specific line
+    separator causes test failures on Windows. (Chris Nauroth via suresh)
+
+    YARN-406. Fix TestRackResolver to function in networks where "host1"
+    resolves to a valid host. (Hitesh Shah via sseth)
+
+    YARN-376. Fixes a bug which would prevent the NM knowing about completed
+    containers and applications. (Jason Lowe via sseth)
+
+    YARN-196. Nodemanager should be more robust in handling connection failure
+    to ResourceManager when a cluster is started (Xuan Gong via hitesh)
+
+    YARN-485. TestProcfsProcessTree#testProcessTree() doesn't wait long enough 
+    for the process to die. (kkambatl via tucu)
+ 
+    YARN-71. Fix the NodeManager to clean up local-dirs on restart.
+    (Xuan Gong via sseth)
+
+    YARN-378. Fix RM to make the AM max attempts/retries to be configurable
+    per application by clients. (Zhijie Shen via vinodkv)
+
+    YARN-498. Unmanaged AM launcher does not set various constants in env for
+    an AM, also does not handle failed AMs properly. (Hitesh Shah via bikas)
+
+    YARN-496. Fair scheduler configs are refreshed inconsistently in
+    reinitialize. (Sandy Ryza via tomwhite)
+
+    YARN-474. Fix CapacityScheduler to trigger application-activation when
+    am-resource-percent configuration is refreshed. (Zhijie Shen via vinodkv)
+
+    YARN-209. Fix CapacityScheduler to trigger application-activation when
+    the cluster capacity changes. (Zhijie Shen via vinodkv)
+
+    YARN-24. Nodemanager fails to start if log aggregation enabled and 
+    namenode unavailable. (sandyr via tucu)
+
+    YARN-515. Node Manager not getting the master key. (Robert Joseph Evans
+    via jlowe)
+
+    YARN-382. SchedulerUtils improve way normalizeRequest sets the resource
+    capabilities. (Zhijie Shen via bikas)
+
+    YARN-467. Modify public distributed cache to localize files such that no
+    local directory hits unix file count limits and thus prevent job failures.
+    (Omkar Vinit Joshi via vinodkv)
+
+    YARN-101. Fix NodeManager heartbeat processing to not lose track of completed
+    containers in case of dropped heartbeats. (Xuan Gong via vinodkv)
+
+    YARN-538. RM address DNS lookup can cause unnecessary slowness on every JHS 
+    page load. (sandyr via tucu)
+
+    YARN-532. Change RMAdmin and Localization client protocol PB implementations
+    to implement closeable so that they can be stopped when needed via
+    RPC.stopProxy(). (Siddharth Seth via vinodkv)
+
+    YARN-99. Modify private distributed cache to localize files such that no
+    local directory hits unix file count limits and thus prevent job failures.
+    (Omkar Vinit Joshi via vinodkv)
+
+    YARN-112. Fixed a race condition during localization that fails containers.
+    (Omkar Vinit Joshi via vinodkv)
+
+    YARN-534. Change RM restart recovery to also account for AM max-attempts 
+    configuration after the restart. (Jian He via vinodkv)
+
+    YARN-539. Addressed memory leak of LocalResource objects NM when a resource
+    localization fails. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-319. Submitting a job to a fair scheduler queue for which the user
+    does not have permission causes the client to wait forever.
+    (shenhong via tomwhite)
+
+    YARN-412. Fixed FifoScheduler to check hostname of a NodeManager rather
+    than its host:port during scheduling which caused incorrect locality for
+    containers. (Roger Hoover via acmurthy)
+
+    YARN-500. Fixed YARN webapps to not roll-over ports when explicitly asked
+    to use non-ephemeral ports. (Kenji Kikushima via vinodkv)
+
+    YARN-518. Fair Scheduler's document link could be added to the hadoop 2.x 
+    main doc page. (sandyr via tucu)
+
+    YARN-476. ProcfsBasedProcessTree info message confuses users. 
+    (sandyr via tucu)
+
+    YARN-585. Fix failure in TestFairScheduler#testNotAllowSubmitApplication
+    caused by YARN-514. (Zhijie Shen via vinodkv)
+
+    YARN-547. Fixed race conditions in public and private resource localization
+    which used to cause duplicate downloads. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-594. Update test and add comments in YARN-534 (Jian He via bikas)
+
+    YARN-549. YarnClient.submitApplication should wait for application to be
+    accepted by the RM (Zhijie Shen via bikas)
+
+    YARN-605. Fix failing unit test in TestNMWebServices when versionInfo has
+    parantheses like when running on a git checkout. (Hitesh Shah via vinodkv)
+
+    YARN-289. Fair scheduler allows reservations that won't fit on node.
+    (Sandy Ryza via tomwhite)
+
+    YARN-576. Modified ResourceManager to reject NodeManagers that don't satisy
+    minimum resource requirements. (Kenji Kikushima via vinodkv)
+
+    YARN-646. Fix two typos in Fair Scheduler user guide. (Dapeng Sun via atm)
+
+    YARN-507. Add interface visibility and stability annotations to FS 
+    interfaces/classes. (kkambatl via tucu)
+
+    YARN-637. FS: maxAssign is not honored. (kkambatl via tucu)
+
+    YARN-655. Fair scheduler metrics should subtract allocated memory from 
+    available memory. (sandyr via tucu)
+
+    YARN-628. Fix the way YarnRemoteException is being unrolled to extract out
+    the underlying exception. (Siddharth Seth via vinodkv)
+
+    YARN-695. Remove masterContainer and status unused fields from
+    ApplicationReportProto and fix bugs in ApplicationReportPBImpl. (Zhijie Shen
+    via vinodkv)
+
+    YARN-706. Fixed race conditions in TestFSDownload. (Zhijie Shen via vinodkv).
+
+    YARN-715. Fixed unit test failures - TestDistributedShell and
+    TestUnmanagedAMLauncher. (Vinod Kumar Vavilapalli via sseth)
+
+    YARN-578. Fixed NM to use SecureIOUtils for reading and aggregating logs.
+    (Omkar Vinit Joshi via vinodkv) 
+
+    YARN-733. Fixed TestNMClient from failing occasionally. (Zhijie Shen via
+    vinodkv)
+
+    YARN-730. Fix NMClientAsync to remove completed containers. (Zhijie Shen
+    via acmurthy)
+
+    YARN-726. Fix queue & finish time fields in web-ui for ResourceManager.
+    (Mayank Bansal via acmurthy) 
+
+    YARN-757. Changed TestRMRestart to use the default scheduler to avoid test
+    failures. (Bikas Saha via vinodkv)
+
+    YARN-742. Log aggregation causes a lot of redundant setPermission calls.
+    (jlowe via kihwal)
+
+    YARN-764. blank Used Resources on Capacity Scheduler page (Nemon Lou via
+    tgraves)
+
+    YARN-761. TestNMClientAsync fails sometimes (Zhijie Shen via bikas)
+
+    YARN-760. NodeManager throws AvroRuntimeException on failed start.
+    (Niranjan Singh via jlowe)
+
+    YARN-767. Initialize application metrics at RM bootup. (Jian He via
+    acmurthy) 
+
+    YARN-700. TestInfoBlock fails on Windows because of line ending missmatch.
+    (Ivan Mitic via cnauroth)
+
+    YARN-117. Migrated rest of YARN to the new service model. (Steve Louhran via
+    vinodkv)
+
+    YARN-812. Set default logger for application summary logger to
+    hadoop.root.logger. (sseth via acmurthy)
+
+    YARN-848. Nodemanager does not register with RM using the fully qualified
+    hostname. (Hitesh Shah via sseth)
+
+    YARN-854. Fixing YARN bugs that are failing applications in secure
+    environment. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-861. TestContainerManager is failing. (Vinod Kumar Vavilapalli via
+    hitesh)
+
+    YARN-874. Making common RPC to switch to not switch to simple when other
+    mechanisms are enabled and thus fix YARN/MR test failures after HADOOP-9421.
+    (Daryn Sharp and Vinod Kumar Vavilapalli via vinodkv)
+
+    YARN-845. RM crash with NPE on NODE_UPDATE (Mayank Bansal via bikas)
+
+    YARN-369. Handle ( or throw a proper error when receiving) status updates
+    from application masters that have not registered (Mayank Bansal &
+    Abhishek Kapoor via bikas)
+
+    YARN-541. getAllocatedContainers() is not returning all the allocated
+    containers (bikas)
+
+    YARN-763. AMRMClientAsync should stop heartbeating after receiving
+    shutdown from RM (Xuan Gong via bikas)
+
+    YARN-654. AMRMClient: Perform sanity checks for parameters of public
+    methods (Xuan Gong via bikas)"
+
+    YARN-919. Document setting default heap sizes in yarn-env.sh (Mayank
+    Bansal via hitesh)
+
+    YARN-795. Fair scheduler queue metrics should subtract allocated vCores from 
+    available vCores. (ywskycn via tucu) 
+
+    YARN-799. Fix CgroupsLCEResourcesHandler to use /tasks instead of
+    /cgroup.procs. (Chris Riccomini via acmurthy) 
+
+    YARN-333. Schedulers cannot control the queue-name of an 
+    application. (sandyr via tucu)
+
+    YARN-368. Fixed a typo in error message in Auxiliary services. (Albert Chu
+    via vinodkv)
+
+    YARN-295. Fixed a race condition in ResourceManager RMAppAttempt state
+    machine. (Mayank Bansal via vinodkv)
+
+    YARN-523. Modified a test-case to validate container diagnostics on
+    localization failures. (Jian He via vinodkv)
+
+    YARN-661. Fixed NM to cleanup users' local directories correctly when
+    starting up. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-820. Fixed an invalid state transition in NodeManager caused by failing
+    resource localization. (Mayank Bansal via vinodkv)
+
+    YARN-62. Modified NodeManagers to avoid AMs from abusing container tokens for
+    repetitive container launches. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-814. Improving diagnostics when containers fail during launch due to
+    various reasons like invalid env etc. (Jian He via vinodkv)
+
+    YARN-897. Ensure child queues are ordered correctly to account for
+    completed containers. (Djellel Eddine Difallah via acmurthy)
+
+    YARN-853. Fixed CapacityScheduler's maximum-am-resource-percent to properly
+    work beyond refreshing queues. (Devaraj K via vinodkv)
+
+    YARN-873. YARNClient.getApplicationReport(unknownAppId) returns a null
+    report (Xuan Gong via bikas)
+
+    YARN-875. Application can hang if AMRMClientAsync callback thread has
+    exception (Xuan Gong via bikas)
+
+    YARN-968. RM admin commands don't work. (vinodkv via kihwal)
+
+    YARN-688. Fixed NodeManager to properly cleanup containers when it is shut
+    down. (Jian He via vinodkv)
+
+    YARN-960. Fixed ResourceManager to propagate client-submitted credentials
+    irrespective of security. (Daryn Sharp via vinodkv)
+
+    YARN-937. Fix unmanaged AM in non-secure/secure setup post YARN-701. (tucu)
+
+    YARN-932. TestResourceLocalizationService.testLocalizationInit can fail on
+    JDK7. (Karthik Kambatla via Sandy Ryza)
+
+    YARN-961. Changed ContainerManager to enforce Token auth irrespective of
+    security. (Omkar Vinit Joshi via vinodkv)
+
+    YARN-945. Removed setting of AMRMToken's service from ResourceManager
+    and changed client libraries do it all the time and correctly. (vinodkv)
+
+    YARN-656. In scheduler UI, including reserved memory in Memory Total can 
+    make it exceed cluster capacity. (Sandy Ryza)
+
+  BREAKDOWN OF HADOOP-8562/YARN-191 SUBTASKS AND RELATED JIRAS
+
+    YARN-158. Yarn creating package-info.java must not depend on sh.
+    (Chris Nauroth via suresh)
+
+    YARN-176. Some YARN tests fail to find winutils. (Chris Nauroth via suresh)
+    
+    YARN-207. YARN distribution build fails on Windows. (Chris Nauroth via
+    suresh)
+
+    YARN-199. Yarn cmd line scripts for windows. (Ivan Mitic via suresh)
+
+    YARN-213. YARN build script would be more readable using abspath.
+    (Chris Nauroth via suresh)
+
+    YARN-233. Added support for running containers in MS Windows to YARN. (Chris
+    Nauroth via acmurthy)
+
+    YARN-234. Added support for process tree and resource calculator in MS Windows 
+    to YARN. (Chris Nauroth via acmurthy)
+
+    YARN-259. Fix LocalDirsHandlerService to use Path rather than URIs. (Xuan
+    Gong via acmurthy) 
+
+    YARN-316. YARN container launch may exceed maximum Windows command line 
+    length due to long classpath. (Chris Nauroth via suresh)
+
+    YARN-359. Fixing commands for container signalling in Windows. (Chris Nauroth
+    via vinodkv)
+
+    YARN-506. Move to common utils FileUtil#setReadable/Writable/Executable and 
+    FileUtil#canRead/Write/Execute. (Ivan Mitic via suresh)
+
+    YARN-488. TestContainerManagerSecurity fails on Windows. (Chris Nauroth
+    via hitesh)
+
+    YARN-490. TestDistributedShell fails on Windows. (Chris Nauroth via hitesh)
+
+    YARN-491. TestContainerLogsPage fails on Windows. (Chris Nauroth via hitesh)
+
+    YARN-487. Modify path manipulation in LocalDirsHandlerService to let
+    TestDiskFailures pass on Windows. (Chris Nauroth via vinodkv)
+
+    YARN-593. container launch on Windows does not correctly populate
+    classpath with new process's environment variables and localized resources
+    (Chris Nauroth via bikas)
+
+    YARN-493. Fixed some shell related flaws in YARN on Windows. (Chris Nauroth
+    via vinodkv)
+
+    YARN-839. TestContainerLaunch.testContainerEnvVariables fails on Windows.
+    (Chuan Liu via cnauroth)
+
+    YARN-597. TestFSDownload fails on Windows due to dependencies on
+    tar/gzip/jar tools. (Ivan Mitic via acmurthy) 
+
+    YARN-852. TestAggregatedLogFormat.testContainerLogsFileAccess fails on
+    Windows. (Chuan Liu via cnauroth)
+
+    YARN-894. NodeHealthScriptRunner timeout checking is inaccurate on Windows.
+    (Chuan Liu via cnauroth)
+
+    YARN-909. Disable TestLinuxContainerExecutorWithMocks on Windows. (Chuan Liu
+    via cnauroth)
+
+    YARN-1043. Push all metrics consistently. (Jian He via acmurthy) 
+
+    YARN-1056. Remove dual use of string 'resourcemanager' in
+    yarn.resourcemanager.connect.{max.wait.secs|retry_interval.secs}
+    (Karthik Kambatla via acmurthy)
+
+Release 2.0.6-alpha - 08/22/2013
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-854. Fixing YARN bugs that are failing applications in secure
+    environment. (Omkar Vinit Joshi and shv)
+
+Release 2.0.5-alpha - 06/06/2013
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 2.0.4-alpha - 2013-04-25
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-429. capacity-scheduler config missing from yarn-test artifact.
+    (sseth via hitesh)
+
+    YARN-470. Support a way to disable resource monitoring on the NodeManager.
+    (Siddharth Seth via hitesh)
+    
+Release 2.0.3-alpha - 2013-02-06 
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+    YARN-145. Add a Web UI to the fair share scheduler. (Sandy Ryza via tomwhite)
+
+    YARN-3. Add support for CPU isolation/monitoring of containers. 
+    (adferguson via tucu)
+
+    YARN-230. RM Restart phase 1 - includes support for saving/restarting all
+    applications on an RM bounce. (Bikas Saha via acmurthy)
+
+    YARN-103. Add a yarn AM-RM client module. (Bikas Saha via sseth)
+
+    YARN-286. Add a YARN ApplicationClassLoader. (tomwhite)
+
+    YARN-2. Enhanced CapacityScheduler to account for CPU alongwith memory for
+    multi-dimensional resource scheduling. (acmurthy)
+
+    YARN-328. Use token request messages defined in hadoop common. (suresh)
+
+    YARN-231. RM Restart - Add FS-based persistent store implementation for
+    RMStateStore (Bikas Saha via hitesh)
+
+  IMPROVEMENTS
+
+    YARN-223. Update process tree instead of getting new process trees.
+    (Radim Kolar via llu)
+
+    YARN-57. Allow process-tree based resource calculation et al. to be
+    pluggable to support it on multiple platforms. (Radim Kolar via acmurthy)
+
+    YARN-78. Changed UnManagedAM application to use YarnClient. (Bikas Saha via
+    vinodkv)
+
+    YARN-93. Fixed RM to propagate diagnostics from applications that have
+    finished but failed (Jason Lowe via vinodkv). 
+
+    YARN-28. Fixed TestCompositeService to not depend on test-order and thus
+    made it pass on JDK7 (Thomas Graves via vinodkv).
+
+    YARN-82. Change the default local and log dirs to be based on
+    hadoop.tmp.dir and yarn.log.dir. (Hemanth Yamijala via sseth)
+
+    YARN-53. Added the missing getGroups API to ResourceManager. (Bo Wang via
+    vinodkv)
+
+    YARN-116. Add the ability to change the RM include/exclude file without
+    a restart. (xieguiming and Harsh J via sseth)
+
+    YARN-23. FairScheduler: FSQueueSchedulable#updateDemand() - potential 
+    redundant aggregation. (kkambatl via tucu)
+
+    YARN-127. Move RMAdmin tool to its correct location - the client module.
+    (vinodkv)
+
+    YARN-40. Provided support for missing YARN commands (Devaraj K and Vinod
+    Kumar Vavilapalli via vinodkv)
+
+    YARN-33. Change LocalDirsHandlerService to validate the configured local and
+    log dirs. (Mayank Bansal via sseth)
+
+    YARN-94. Modify DistributedShell to point to main-class by default, clean up
+    the help message, and hard-code the AM class. (Hitesh Shah via vinodkv)
+
+    YARN-146. Add unit tests for computing fair share in the fair scheduler.
+    (Sandy Ryza via tomwhite)
+
+    HADOOP-8911. CRLF characters in source and text files.
+    (Raja Aluri via suresh)
+
+    YARN-136. Make ClientToAMTokenSecretManager part of RMContext (Vinod Kumar
+    Vavilapalli via sseth)
+
+    YARN-183. Clean up fair scheduler code. (Sandy Ryza via tomwhite)
+
+    YARN-129. Simplify classpath construction for mini YARN tests. (tomwhite)
+
+    YARN-254. Update fair scheduler web UI for hierarchical queues. 
+    (sandyr via tucu)
+
+    YARN-315. Using the common security token protobuf definition from hadoop
+    common. (Suresh Srinivas via vinodkv) 
+
+    YARN-170. Change NodeManager stop to be reentrant. (Sandy Ryza via vinodkv)
+
+    YARN-331. Fill in missing fair scheduler documentation. (sandyr via tucu)
+
+    YARN-277. Use AMRMClient in DistributedShell to exemplify the approach.
+    (Bikas Saha via hitesh)
+
+    YARN-360. Allow apps to concurrently register tokens for renewal.
+    (Daryn Sharp via sseth)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+    
+    YARN-131. Fix incorrect ACL properties in capacity scheduler documentation.
+    (Ahmed Radwan via sseth)
+
+    YARN-102. Move the apache header to the top of the file in MemStore.java.
+    (Devaraj K via sseth)
+    
+    YARN-134. ClientToAMSecretManager creates keys without checking for
+    validity of the appID. (Vinod Kumar Vavilapalli via sseth)
+
+    YARN-30. Fixed tests verifying web-services to work on JDK7. (Thomas Graves
+    via vinodkv)
+
+    YARN-150. Fixes AppRejectedTransition does not unregister a rejected
+    app-attempt from the ApplicationMasterService (Bikas Saha via sseth)
+
+    YARN-140. Add capacity-scheduler-default.xml to provide a default set of
+    configurations for the capacity scheduler. (ahmed via tucu)
+
+    YARN-179. Fix some unit test failures. (Vinod Kumar Vavilapalli via sseth)
+
+    YARN-181. Fixed eclipse settings broken by capacity-scheduler.xml move via
+    YARN-140. (Siddharth Seth via vinodkv)
+
+    YARN-169. Update log4j.appender.EventCounter to use
+    org.apache.hadoop.log.metrics.EventCounter (Anthony Rojas via tomwhite)
+
+    YARN-184. Remove unnecessary locking in fair scheduler, and address 
+    findbugs excludes. (sandyr via tucu)
+
+    YARN-224. Fair scheduler logs too many nodeUpdate INFO messages.
+    (Sandy Ryza via tomwhite)
+
+    YARN-222. Fair scheduler should create queue for each user by default.
+    (Sandy Ryza via tomwhite)
+
+    MAPREDUCE-4778. Fair scheduler event log is only written if directory
+    exists on HDFS. (Sandy Ryza via tomwhite)
+
+    YARN-229. Remove old unused RM recovery code. (Bikas Saha via acmurthy) 
+
+    YARN-187. Add hierarchical queues to the fair scheduler.
+    (Sandy Ryza via tomwhite)
+
+    YARN-72. NM should handle cleaning up containers when it shuts down.
+    (Sandy Ryza via tomwhite)
+
+    YARN-267. Fix fair scheduler web UI. (Sandy Ryza via tomwhite)
+
+    YARN-264. y.s.rm.DelegationTokenRenewer attempts to renew token even 
+    after removing an app. (kkambatl via tucu)
+
+    YARN-271. Fair scheduler hits IllegalStateException trying to reserve
+    different apps on same node. (Sandy Ryza via tomwhite)
+
+    YARN-272. Fair scheduler log messages try to print objects without 
+    overridden toString methods. (sandyr via tucu)
+
+    YARN-278. Fair scheduler maxRunningApps config causes no apps to make
+    progress. (sandyr via tucu)
+
+    YARN-282. Fair scheduler web UI double counts Apps Submitted. 
+    (sandyr via tucu)
+
+    YARN-283. Fair scheduler fails to get queue info without root prefix. 
+    (sandyr via tucu)
+
+    YARN-192. Node update causes NPE in the fair scheduler.
+    (Sandy Ryza via tomwhite)
+
+    YARN-288. Fair scheduler queue doesn't accept any jobs when ACLs are
+    configured. (Sandy Ryza via tomwhite)
+
+    YARN-300. After YARN-271, fair scheduler can infinite loop and not
+    schedule any application. (Sandy Ryza via tomwhite)
+
+    YARN-301. Fair scheduler throws ConcurrentModificationException when
+    iterating over app's priorities. (Sandy Ryza via tomwhite)
+
+    YARN-217. Fix RMAdmin protocol description to make it work in secure mode
+    also. (Devaraj K via vinodkv)
+
+    YARN-253. Fixed container-launch to not fail when there are no local
+    resources to localize. (Tom White via vinodkv)
+
+    YARN-330. Fix flakey test: TestNodeManagerShutdown#testKillContainersOnShutdown.
+    (Sandy Ryza via hitesh)
+    
+    YARN-335. Fair scheduler doesn't check whether rack needs containers
+    before assigning to node. (Sandy Ryza via tomwhite)
+    
+    YARN-336. Fair scheduler FIFO scheduling within a queue only allows 1
+    app at a time. (Sandy Ryza via tomwhite)
+
+    YARN-135. Client tokens should be per app-attempt, and should be
+    unregistered on App-finish. (vinodkv via sseth)
+
+    YARN-302. Fair scheduler assignmultiple should default to false. (sandyr via tucu)
+    
+    YARN-372. Move InlineDispatcher from hadoop-yarn-server-resourcemanager to
+    hadoop-yarn-common (sseth via hitesh)
+
+    YARN-370. Fix SchedulerUtils to correctly round up the resource for
+    containers. (Zhijie Shen via acmurthy) 
+
+    YARN-355. Fixes a bug where RM app submission could jam under load.
+    (Daryn Sharp via sseth)
+
+Release 2.0.2-alpha - 2012-09-07 
+
+  INCOMPATIBLE CHANGES
+
+    YARN-9. Rename YARN_HOME to HADOOP_YARN_HOME. (vinodkv via acmurthy)
+
+  NEW FEATURES
+
+    YARN-1. Promote YARN to be a sub-project of Apache Hadoop. (acmurthy)
+
+  IMPROVEMENTS
+
+    YARN-29. Add a yarn-client module. (Vinod Kumar Vavilapalli via sseth)
+
+    YARN-10. Fix DistributedShell module to not have a dependency on 
+    hadoop-mapreduce-client-core. (Hitesh Shah via vinodkv)
+
+    YARN-80. Add support for delaying rack-local containers in
+    CapacityScheduler. (acmurthy) 
+
+    YARN-137. Change the default YARN scheduler to be the CapacityScheduler. 
+    (sseth via acmurthy) 
+
+  OPTIMAZATIONS
+
+  BUG FIXES
+
+    YARN-12. Fix findbugs warnings in FairScheduler. (Junping Du via acmurthy) 
+
+    YARN-22. Fix ContainerLogs to work if the log-dir is specified as a URI.
+    (Mayank Bansal via sseth)
+
+    YARN-37. Change TestRMAppTransitions to use the DrainDispatcher.
+    (Mayank Bansal via sseth)
+
+    YARN-79. Implement close on all clients to YARN so that RPC clients don't
+    throw exceptions on shut-down. (Vinod Kumar Vavilapalli)
+
+    YARN-42. Modify NM's non-aggregating logs' handler to stop properly so that
+    NMs don't get NPEs on startup errors. (Devaraj K via vinodkv)
+
+    YARN-15. Updated default classpath for YARN applications to reflect split of
+    YARN into a sub-project. (Arun C Murthy via vinodkv)
+
+    YARN-75. Modified ResourceManager's RMContainer to handle a valid RELEASE
+    event at RUNNING state. (Siddharth Seth via vinodkv)
+
+    MAPREDUCE-2374. "Text File Busy" errors launching MR tasks. (Andy Isaacson
+    via atm)
+
+    YARN-138. Ensure default values for minimum/maximum container sizes is
+    sane. (harsh & sseth via acmurthy)
+
+Release 0.23.11 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-1180. Update capacity scheduler docs to include types on the configs
+    (Chen He via jeagles)
+
+Release 0.23.10 - 2013-12-09
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-985. Nodemanager should log where a resource was localized (Ravi
+    Prakash via jeagles)
+
+    YARN-1119. Add ClusterMetrics checks to tho TestRMNodeTransitions tests
+    (Mit Desai via jeagles)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-337. RM handles killed application tracking URL poorly (jlowe)
+
+    YARN-1101. Active nodes can be decremented below 0 (Robert Parker 
+    via tgraves)
+
+    YARN-1176. RM web services ClusterMetricsInfo total nodes doesn't include 
+    unhealthy nodes (Jonathan Eagles via tgraves)
+
+    YARN-1386. NodeManager mistakenly loses resources and relocalizes them
+    (Jason Lowe via jeagles)
+
+Release 0.23.9 - 2013-07-08
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+    
+  IMPROVEMENTS
+
+    YARN-427. Coverage fix for org.apache.hadoop.yarn.server.api.* (Aleksey
+    Gorshkov via jeagles)
+
+    YARN-478. fix coverage org.apache.hadoop.yarn.webapp.log (Aleksey Gorshkov
+    via jeagles)
+    
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 0.23.8 - 2013-06-05
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+    YARN-548. Add tests for YarnUncaughtExceptionHandler (Vadim Bondarev via
+    jeagles)
+
+  BUG FIXES
+
+    YARN-363. Add webapps/proxy directory without which YARN proxy-server fails
+    when started in stand-alone mode. (Kenji Kikushima via vinodkv)
+
+    YARN-690. RM exits on token cancel/renew problems (daryn via bobby)
+
+Release 0.23.7 - 2013-04-18
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-133 Update web services docs for RM clusterMetrics (Ravi Prakash via
+    kihwal)
+
+    YARN-249. Capacity Scheduler web page should show list of active users per 
+    queue like it used to (in 1.x) (Ravi Prakash via tgraves)
+
+    YARN-236. RM should point tracking URL to RM web page when app fails to
+    start (Jason Lowe via jeagles)
+
+    YARN-269. Resource Manager not logging the health_check_script result when
+    taking it out (Jason Lowe via kihwal)
+
+    YARN-227. Application expiration difficult to debug for end-users
+    (Jason Lowe via jeagles)
+   
+    YARN-443. allow OS scheduling priority of NM to be different than the 
+    containers it launches (tgraves)
+
+    YARN-468. coverage fix for org.apache.hadoop.yarn.server.webproxy.amfilter
+    (Aleksey Gorshkov via bobby)
+
+    YARN-200. yarn log does not output all needed information, and is in a
+    binary format (Ravi Prakash via jlowe)
+
+    YARN-525. make CS node-locality-delay refreshable (Thomas Graves via jlowe)
+
+  OPTIMIZATIONS
+
+    YARN-357. App submission should not be synchronized (daryn)
+
+  BUG FIXES
+
+    YARN-343. Capacity Scheduler maximum-capacity value -1 is invalid (Xuan 
+    Gong via tgraves)
+
+    YARN-364. AggregatedLogDeletionService can take too long to delete logs
+    (jlowe)
+
+    YARN-362. Unexpected extra results when using webUI table search (Ravi
+    Prakash via jlowe)
+
+    YARN-400. RM can return null application resource usage report leading to 
+    NPE in client (Jason Lowe via tgraves)
+
+    YARN-426. Failure to download a public resource prevents further downloads
+    (Jason Lowe via bobby)
+
+    YARN-448. Remove unnecessary hflush from log aggregation (Kihwal Lee via
+    bobby)
+
+    YARN-345. Many InvalidStateTransitonException errors for ApplicationImpl
+    in Node Manager (Robert Parker via jlowe)
+
+    YARN-109. .tmp file is not deleted for localized archives (Mayank Bansal 
+    via bobby)
+
+    YARN-460. CS user left in list of active users for the queue even when 
+    application finished (tgraves)
+
+Release 0.23.6 - 2013-02-06
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-285. Added a temporary plugin interface for RM to be able to redirect
+    to JobHistory server for apps that it no longer tracks. (Derek Dagit via
+    vinodkv)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-188. Coverage fixing for CapacityScheduler (Aleksey Gorshkov via
+    bobby)
+
+    YARN-214. RMContainerImpl does not handle event EXPIRE at state RUNNING
+    (jeagles via bobby)
+
+    YARN-151. Browser thinks RM main page JS is taking too long 
+    (Ravi Prakash via bobby)
+
+    YARN-204. test coverage for org.apache.hadoop.tools (Aleksey Gorshkov via
+    bobby)
+
+    YARN-251. Proxy URI generation fails for blank tracking URIs (Tom White
+    via jlowe)
+
+    YARN-258. RM web page UI shows Invalid Date for start and finish times
+    (Ravi Prakash via jlowe)
+
+    YARN-266. RM and JHS Web UIs are blank because AppsBlock is not escaping
+    string properly (Ravi Prakash via jlowe)
+
+    YARN-280. RM does not reject app submission with invalid tokens 
+    (Daryn Sharp via tgraves)
+
+    YARN-225. Proxy Link in RM UI thows NPE in Secure mode 
+    (Devaraj K via bobby)
+
+    YARN-293. Node Manager leaks LocalizerRunner object for every Container
+    (Robert Joseph Evans via jlowe)
+
+    YARN-50. Implement renewal / cancellation of Delegation Tokens
+    (Siddharth Seth via tgraves)
+
+    YARN-320. RM should always be able to renew its own tokens. 
+    (Daryn Sharp via sseth)
+
+    YARN-325. RM CapacityScheduler can deadlock when getQueueInfo() is 
+    called and a container is completing (Arun C Murthy via tgraves)
+
+    YARN-334. Maven RAT plugin is not checking all source files (tgraves)
+
+    YARN-354. WebAppProxyServer exits immediately after startup (Liang Xie via
+    jlowe)
+
+Release 0.23.5 - 2012-11-28
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    YARN-161. Fix multiple compiler warnings for unchecked operations in YARN
+    common. (Chris Nauroth via vinodkv)
+
+    YARN-43. Fix TestResourceTrackerService to not depend on test order and thus
+    pass on JDK7. (Thomas Graves via vinodkv)
+
+    YARN-32. Fix TestApplicationTokens to not depend on test order and thus pass
+    on JDK7. (vinodkv)
+
+    YARN-186. Coverage fixing LinuxContainerExecutor (Aleksey Gorshkov via
+    bobby)
+
+    YARN-216. Remove jquery theming support. (Robert Joseph Evans via jlowe)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-163. Retrieving container log via NM webapp can hang with multibyte
+    characters in log (jlowe via bobby)
+
+    YARN-174. Modify NodeManager to pass the user's configuration even when
+    rebooting. (vinodkv)
+
+    YARN-177. CapacityScheduler - adding a queue while the RM is running has 
+    wacky results (acmurthy vai tgraves)
+
+    YARN-178. Fix custom ProcessTree instance creation (Radim Kolar via bobby)
+
+    YARN-180. Capacity scheduler - containers that get reserved create 
+    container token to early (acmurthy and bobby)
+
+    YARN-139. Interrupted Exception within AsyncDispatcher leads to user
+    confusion. (Vinod Kumar Vavilapalli via jlowe)
+
+    YARN-165. RM should point tracking URL to RM web page for app when AM fails
+    (jlowe via bobby)
+
+    YARN-159. RM web ui applications page should be sorted to display last app
+    first (tgraves via bobby)
+
+    YARN-166. capacity scheduler doesn't allow capacity < 1.0 (tgraves via
+    bobby)
+
+    YARN-189. Fixed a deadlock between RM's ApplicationMasterService and the
+    dispatcher. (Thomas Graves via vinodkv)
+
+    YARN-202. Log Aggregation generates a storm of fsync() for namenode 
+    (Kihwal Lee via bobby)
+
+    YARN-201. Fix CapacityScheduler to be less conservative for starved 
+    off-switch requests. (jlowe via acmurthy) 
+
+    YARN-206. TestApplicationCleanup.testContainerCleanup occasionally fails.
+    (jlowe via jeagles)
+
+    YARN-212. NM state machine ignores an APPLICATION_CONTAINER_FINISHED event
+    when it shouldn't (Nathan Roberts via jlowe)
+
+    YARN-219. NM should aggregate logs when application finishes. (bobby)
+
+Release 0.23.4
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+    Change package of YarnClient to org.apache.hadoop. (Bikas Saha via vinodkv)
+
+    YARN-108. FSDownload can create cache directories with the wrong
+    permissions (Jason Lowe via bobby)
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+    YARN-88. DefaultContainerExecutor can fail to set proper permissions.
+    (Jason Lowe via sseth)
+
+    YARN-106. Nodemanager needs to set permissions of local directories (jlowe
+    via bobby)
+
+Release 0.23.3
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMAZATIONS
+
+  BUG FIXES
+
+    YARN-14. Symlinks to peer distributed cache files no longer work 
+    (Jason Lowe via bobby) 
+
+    YARN-25. remove old aggregated logs  (Robert Evans via tgraves)
+
+    YARN-27. Failed refreshQueues due to misconfiguration prevents further 
+    refreshing of queues (Arun Murthy via tgraves)
+
+    YARN-58. NM leaks filesystems (Jason Lowe via jeagles)
+    
+    YARN-39. RM-NM secret-keys should be randomly generated and rolled every
+    so often. (vinodkv and sseth via sseth)
+
+    YARN-31. Fix TestDelegationTokenRenewer to not depend on test order so as to
+    pass tests on jdk7. (Thomas Graves via vinodkv)
+
+    YARN-63. RMNodeImpl is missing valid transitions from the UNHEALTHY state
+    (Jason Lowe via bobby)
+
+    YARN-60. Fixed a bug in ResourceManager which causes all NMs to get NPEs and
+    thus causes all containers to be rejected. (vinodkv)
+
+    YARN-66. aggregated logs permissions not set properly (tgraves via bobby)
+
+    YARN-68. NodeManager will refuse to shutdown indefinitely due to container
+    log aggregation (daryn via bobby)
+
+    YARN-87. NM ResourceLocalizationService does not set permissions of local 
+    cache directories (Jason Lowe via tgraves)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ContainerStatus.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.api.records;
 
 import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.yarn.util.Records;
@@ -31,6 +32,7 @@ import org.apache.hadoop.yarn.util.Records;
  * It provides details such as:
  * <ul>
  *   <li>{@code ContainerId} of the container.</li>
+ *   <li>{@code ExecutionType} of the container.</li>
  *   <li>{@code ContainerState} of the container.</li>
  *   <li><em>Exit status</em> of a completed container.</li>
  *   <li><em>Diagnostic</em> message for a failed container.</li>
@@ -45,7 +47,17 @@ public abstract class ContainerStatus {
   @Unstable
   public static ContainerStatus newInstance(ContainerId containerId,
       ContainerState containerState, String diagnostics, int exitStatus) {
+    return newInstance(containerId, ExecutionType.GUARANTEED, containerState,
+        diagnostics, exitStatus);
+  }
+
+  @Private
+  @Unstable
+  public static ContainerStatus newInstance(ContainerId containerId,
+      ExecutionType executionType, ContainerState containerState,
+      String diagnostics, int exitStatus) {
     ContainerStatus containerStatus = Records.newRecord(ContainerStatus.class);
+    containerStatus.setExecutionType(executionType);
     containerStatus.setState(containerState);
     containerStatus.setContainerId(containerId);
     containerStatus.setDiagnostics(diagnostics);
@@ -65,6 +77,18 @@ public abstract class ContainerStatus {
   @Unstable
   public abstract void setContainerId(ContainerId containerId);
 
+  /**
+   * Get the <code>ExecutionType</code> of the container.
+   * @return <code>ExecutionType</code> of the container
+   */
+  @Public
+  @Evolving
+  public abstract ExecutionType getExecutionType();
+
+  @Private
+  @Unstable
+  public abstract void setExecutionType(ExecutionType executionType);
+
   /**
    * Get the <code>ContainerState</code> of the container.
    * @return <code>ContainerState</code> of the container

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ExecutionType.java

@@ -0,0 +1,43 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.yarn.api.records;
+
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
+/**
+ * Container property encoding execution semantics.
+ *
+ * <p>
+ * The execution types are the following:
+ * <ul>
+ *   <li>{@link #GUARANTEED} - this container is guaranteed to start its
+ *   execution, once the corresponding start container request is received by
+ *   an NM.
+ *   <li>{@link #OPPORTUNISTIC} - the execution of this container may not start
+ *   immediately at the NM that receives the corresponding start container
+ *   request (depending on the NM's available resources). Moreover, it may be
+ *   preempted if it blocks a GUARANTEED container from being executed.
+ * </ul>
+ */
+@Public
+@Evolving
+public enum ExecutionType {
+  GUARANTEED, OPPORTUNISTIC
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/server/api/ContainerContext.java

@@ -23,6 +23,7 @@ import org.apache.hadoop.classification.InterfaceAudience.Public;
 import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.yarn.api.records.ContainerId;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
 import org.apache.hadoop.yarn.api.records.Resource;
 
 /**
@@ -36,6 +37,7 @@ public class ContainerContext {
   private final ContainerId containerId;
   private final Resource resource;
   private final ContainerType containerType;
+  private final ExecutionType executionType;
 
   @Private
   @Unstable
@@ -48,10 +50,20 @@ public class ContainerContext {
   @Unstable
   public ContainerContext(String user, ContainerId containerId,
       Resource resource, ContainerType containerType) {
+    this(user, containerId, resource, containerType,
+        ExecutionType.GUARANTEED);
+  }
+
+  @Private
+  @Unstable
+  public ContainerContext(String user, ContainerId containerId,
+      Resource resource, ContainerType containerType,
+      ExecutionType executionType) {
     this.user = user;
     this.containerId = containerId;
     this.resource = resource;
     this.containerType = containerType;
+    this.executionType = executionType;
   }
 
   /**
@@ -91,4 +103,14 @@ public class ContainerContext {
   public ContainerType getContainerType() {
     return containerType;
   }
+
+  /**
+   * Get {@link ExecutionType} the execution type of the container
+   * being initialized or stopped.
+   *
+   * @return the execution type of the container
+   */
+  public ExecutionType getExecutionType() {
+    return executionType;
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_protos.proto

@@ -288,6 +288,12 @@ message AMBlackListingRequestProto {
   optional bool blacklisting_enabled = 1 [default = false];
   optional float blacklisting_failure_threshold = 2;
 }
+
+enum ExecutionTypeProto {
+  GUARANTEED = 1;
+  OPPORTUNISTIC = 2;
+}
+
 ////////////////////////////////////////////////////////////////////////
 ////// From AM_RM_Protocol /////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////
@@ -513,6 +519,7 @@ message ContainerStatusProto {
   optional string diagnostics = 3 [default = "N/A"];
   optional int32 exit_status = 4 [default = -1000];
   optional ResourceProto capability = 5;
+  optional ExecutionTypeProto executionType = 6 [default = GUARANTEED];
 }
 
 enum ContainerExitStatusProto {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ContainerStatusPBImpl.java

@@ -24,9 +24,11 @@ import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.ContainerState;
 import org.apache.hadoop.yarn.api.records.ContainerStatus;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerIdProto;
+import org.apache.hadoop.yarn.proto.YarnProtos.ExecutionTypeProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerStateProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerStatusProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerStatusProtoOrBuilder;
@@ -79,6 +81,7 @@ public class ContainerStatusPBImpl extends ContainerStatus {
     StringBuilder sb = new StringBuilder();
     sb.append("ContainerStatus: [");
     sb.append("ContainerId: ").append(getContainerId()).append(", ");
+    sb.append("ExecutionType: ").append(getExecutionType()).append(", ");
     sb.append("State: ").append(getState()).append(", ");
     sb.append("Capability: ").append(getCapability()).append(", ");
     sb.append("Diagnostics: ").append(getDiagnostics()).append(", ");
@@ -107,7 +110,25 @@ public class ContainerStatusPBImpl extends ContainerStatus {
     }
     viaProto = false;
   }
-    
+
+  @Override
+  public synchronized ExecutionType getExecutionType() {
+    ContainerStatusProtoOrBuilder p = viaProto ? proto : builder;
+    if (!p.hasExecutionType()) {
+      return null;
+    }
+    return convertFromProtoFormat(p.getExecutionType());
+  }
+
+  @Override
+  public synchronized void setExecutionType(ExecutionType executionType) {
+    maybeInitBuilder();
+    if (executionType == null) {
+      builder.clearExecutionType();
+      return;
+    }
+    builder.setExecutionType(convertToProtoFormat(executionType));
+  }
   
   @Override
   public synchronized ContainerState getState() {
@@ -206,6 +227,14 @@ public class ContainerStatusPBImpl extends ContainerStatus {
     return ((ContainerIdPBImpl)t).getProto();
   }
 
+  private ExecutionType convertFromProtoFormat(ExecutionTypeProto e) {
+    return ProtoUtils.convertFromProtoFormat(e);
+  }
+
+  private ExecutionTypeProto convertToProtoFormat(ExecutionType e) {
+    return ProtoUtils.convertToProtoFormat(e);
+  }
+
   private ResourceProto convertToProtoFormat(Resource e) {
     return ((ResourcePBImpl)e).getProto();
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ProtoUtils.java

@@ -28,6 +28,7 @@ import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
 import org.apache.hadoop.yarn.api.records.ApplicationResourceUsageReport;
 import org.apache.hadoop.yarn.api.records.ContainerRetryPolicy;
 import org.apache.hadoop.yarn.api.records.ContainerState;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
 import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
 import org.apache.hadoop.yarn.api.records.LocalResourceType;
 import org.apache.hadoop.yarn.api.records.LocalResourceVisibility;
@@ -56,6 +57,7 @@ import org.apache.hadoop.yarn.proto.YarnProtos.YarnApplicationAttemptStateProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.YarnApplicationStateProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerRetryPolicyProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerTypeProto;
+import org.apache.hadoop.yarn.proto.YarnProtos.ExecutionTypeProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos;
 import org.apache.hadoop.yarn.server.api.ContainerType;
 
@@ -297,4 +299,14 @@ public class ProtoUtils {
       ContainerRetryPolicyProto e) {
     return ContainerRetryPolicy.valueOf(e.name());
   }
+
+  /*
+   * ExecutionType
+   */
+  public static ExecutionTypeProto convertToProtoFormat(ExecutionType e) {
+    return ExecutionTypeProto.valueOf(e.name());
+  }
+  public static ExecutionType convertFromProtoFormat(ExecutionTypeProto e) {
+    return ExecutionType.valueOf(e.name());
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/ContainerTokenIdentifier.java

@@ -33,6 +33,7 @@ import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.yarn.api.records.ContainerId;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
 import org.apache.hadoop.yarn.api.records.LogAggregationContext;
 import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.Resource;
@@ -43,6 +44,7 @@ import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerTypeProto;
+import org.apache.hadoop.yarn.proto.YarnProtos.ExecutionTypeProto;
 import org.apache.hadoop.yarn.proto.YarnSecurityTokenProtos.ContainerTokenIdentifierProto;
 import org.apache.hadoop.yarn.server.api.ContainerType;
 
@@ -85,6 +87,16 @@ public class ContainerTokenIdentifier extends TokenIdentifier {
       long rmIdentifier, Priority priority, long creationTime,
       LogAggregationContext logAggregationContext, String nodeLabelExpression,
       ContainerType containerType) {
+    this(containerID, hostName, appSubmitter, r, expiryTimeStamp, masterKeyId,
+        rmIdentifier, priority, creationTime, logAggregationContext,
+        nodeLabelExpression, containerType, ExecutionType.GUARANTEED);
+  }
+
+  public ContainerTokenIdentifier(ContainerId containerID, String hostName,
+      String appSubmitter, Resource r, long expiryTimeStamp, int masterKeyId,
+      long rmIdentifier, Priority priority, long creationTime,
+      LogAggregationContext logAggregationContext, String nodeLabelExpression,
+      ContainerType containerType, ExecutionType executionType) {
     ContainerTokenIdentifierProto.Builder builder =
         ContainerTokenIdentifierProto.newBuilder();
     if (containerID != null) {
@@ -112,6 +124,7 @@ public class ContainerTokenIdentifier extends TokenIdentifier {
       builder.setNodeLabelExpression(nodeLabelExpression);
     }
     builder.setContainerType(convertToProtoFormat(containerType));
+    builder.setExecutionType(convertToProtoFormat(executionType));
 
     proto = builder.build();
   }
@@ -163,7 +176,7 @@ public class ContainerTokenIdentifier extends TokenIdentifier {
     return proto.getCreationTime();
   }
   /**
-   * Get the RMIdentifier of RM in which containers are allocated
+   * Get the RMIdentifier of RM in which containers are allocated.
    * @return RMIdentifier
    */
   public long getRMIdentifier() {
@@ -181,6 +194,17 @@ public class ContainerTokenIdentifier extends TokenIdentifier {
     return convertFromProtoFormat(proto.getContainerType());
   }
 
+  /**
+   * Get the ExecutionType of container to allocate
+   * @return ExecutionType
+   */
+  public ExecutionType getExecutionType(){
+    if (!proto.hasExecutionType()) {
+      return null;
+    }
+    return convertFromProtoFormat(proto.getExecutionType());
+  }
+
   public ContainerTokenIdentifierProto getProto() {
     return proto;
   }
@@ -265,4 +289,13 @@ public class ContainerTokenIdentifier extends TokenIdentifier {
       ContainerTypeProto containerType) {
     return ProtoUtils.convertFromProtoFormat(containerType);
   }
+
+  private ExecutionTypeProto convertToProtoFormat(ExecutionType executionType) {
+    return ProtoUtils.convertToProtoFormat(executionType);
+  }
+
+  private ExecutionType convertFromProtoFormat(
+      ExecutionTypeProto executionType) {
+    return ProtoUtils.convertFromProtoFormat(executionType);
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/proto/yarn_security_token.proto

@@ -51,6 +51,7 @@ message ContainerTokenIdentifierProto {
   optional LogAggregationContextProto logAggregationContext = 10;
   optional string nodeLabelExpression = 11;
   optional ContainerTypeProto containerType = 12;
+  optional ExecutionTypeProto executionType = 13 [default = GUARANTEED];
 }
 
 message ClientToAMTokenIdentifierProto {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/security/TestYARNTokenIdentifier.java

@@ -29,6 +29,7 @@ import org.apache.hadoop.security.HadoopKerberosName;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ContainerId;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.Resource;
@@ -209,6 +210,9 @@ public class TestYARNTokenIdentifier {
 
     Assert.assertEquals(ContainerType.TASK,
         anotherToken.getContainerType());
+
+    Assert.assertEquals(ExecutionType.GUARANTEED,
+        anotherToken.getExecutionType());
   }
   
   @Test
@@ -384,10 +388,14 @@ public class TestYARNTokenIdentifier {
     Assert.assertEquals(ContainerType.APPLICATION_MASTER,
         anotherToken.getContainerType());
 
+    Assert.assertEquals(ExecutionType.GUARANTEED,
+        anotherToken.getExecutionType());
+
     token =
         new ContainerTokenIdentifier(containerID, hostName, appSubmitter, r,
             expiryTimeStamp, masterKeyId, rmIdentifier, priority, creationTime,
-            null, CommonNodeLabelsManager.NO_LABEL, ContainerType.TASK);
+            null, CommonNodeLabelsManager.NO_LABEL, ContainerType.TASK,
+            ExecutionType.OPPORTUNISTIC);
 
     anotherToken = new ContainerTokenIdentifier();
 
@@ -398,6 +406,9 @@ public class TestYARNTokenIdentifier {
 
     Assert.assertEquals(ContainerType.TASK,
         anotherToken.getContainerType());
+
+    Assert.assertEquals(ExecutionType.OPPORTUNISTIC,
+        anotherToken.getExecutionType());
   }
 
 }