hadoop/hadoop-mapreduce-project/CHANGES.txt

Hadoop MapReduce Change Log

Release 0.23.1 - 2012-02-17 

  INCOMPATIBLE CHANGES

  NEW FEATURES

    MAPREDUCE-778. Rumen Anonymizer. (Amar Kamat and Chris Douglas via amarrk)

    MAPREDUCE-3121. NodeManager should handle disk-failures (Ravi Gummadi via mahadev)

    MAPREDUCE-2863. Support web services for YARN and MR components. (Thomas
    Graves via vinodkv)

    MAPREDUCE-3251. Network ACLs can prevent some clients to talk to MR ApplicationMaster.
    (Anupam Seth via mahadev)

    MAPREDUCE-778. Rumen Anonymizer. (Amar Kamat and Chris Douglas via amarrk)

  IMPROVEMENTS

    MAPREDUCE-3481. [Gridmix] Improve Gridmix STRESS mode. (amarrk)

    MAPREDUCE-3597. [Rumen] Rumen should provide APIs to access all the 
                    job-history related information.

    MAPREDUCE-3375. [Gridmix] Memory Emulation system tests. 
                    (Vinay Thota via amarrk)

    MAPREDUCE-2733. [Gridmix] Gridmix3 cpu emulation system tests. 
                    (Vinay Thota via amarrk)

    MAPREDUCE-3297. Moved log related components into yarn-common so that
    HistoryServer and clients can use them without depending on the
    yarn-server-nodemanager module. (Siddharth Seth via vinodkv)

    MAPREDUCE-3336. Replaced guice internal.Preconditions api usage with the
    public Preconditions API. (Thomas Graves via vinodkv)

    MAPREDUCE-3280. Removed the unnecessary job user-name configuration in
    mapred-site.xml. (vinodkv)

    MAPREDUCE-3370. Fixed MiniMRYarnCluster and related tests to not use
    a hard-coded path for the mr-app jar. (Ahmed Radwan via vinodkv)

    MAPREDUCE-3325. Improvements to CapacityScheduler doc. (Thomas Graves 
    via mahadev)

    MAPREDUCE-3341. Enhance logging of initalized queue limit values.
    (Anupam Seth via mahadev)

    MAPREDUCE-3243. Invalid tracking URL for streaming jobs (Jonathan Eagles 
    via mahadev)

    MAPREDUCE-3331. Improvement to single node cluster setup documentation for 
    0.23 (Anupam Seth via mahadev)

    MAPREDUCE-3102. Changed NodeManager to fail fast when LinuxContainerExecutor
    has wrong configuration or permissions. (Hitesh Shah via vinodkv)

    MAPREDUCE-3415. improve MiniMRYarnCluster & DistributedShell JAR
    resolution. (tucu)

    MAPREDUCE-3169. Create a new MiniMRCluster equivalent which only provides 
    client APIs cross MR1 and MR2. (Ahmed via tucu)

    MAPREDUCE-3373. Hadoop scripts unconditionally source
    "$bin"/../libexec/hadoop-config.sh. (Bruno Mahé via tomwhite)

    MAPREDUCE-3372. HADOOP_PREFIX cannot be overridden.
    (Bruno Mahé via tomwhite)

    MAPREDUCE-3411. Performance Upgrade for jQuery (Jonathan Eagles via 
    mahadev)

    MAPREDUCE-3371. Review and improve the yarn-api javadocs. (Ravi Prakash
    via mahadev)

    MAPREDUCE-3238. Small cleanup in SchedulerApp. (Todd Lipcon via mahadev)

    MAPREDUCE-3413. RM web ui applications not sorted in any order by default.
    (Jonathan Eagles via mahadev)

    MAPREDUCE-3045. Fixed UI filters to not filter on hidden title-numeric
    sort fields. (Jonathan Eagles via sseth)

    MAPREDUCE-3448. TestCombineOutputCollector javac unchecked warning on mocked
    generics (Jonathan Eagles via mahadev)

    MAPREDUCE-3169 amendment. Deprecate MiniMRCluster. (Ahmed Radwan via
    sseth)

    MAPREDUCE-3369. Migrate MR1 tests to run on MR2 using the new interfaces
    introduced in MAPREDUCE-3169. (Ahmed Radwan via tomwhite)

    MAPREDUCE-3518. mapred queue -info <queue> -showJobs throws NPE. 
    (Jonathan Eagles via mahadev)

    MAPREDUCE-3391. Making a trivial change to correct a log message in
    DistributedShell app's AM. (Subroto Sanyal via vinodkv)

    MAPREDUCE-3547. Added a bunch of unit tests for the the RM/NM webservices.
    (Thomas Graves via acmurthy)

    MAPREDUCE-3610. Remove use of the 'dfs.block.size' config for default block
    size fetching. Use FS#getDefaultBlocksize instead. (Sho Shimauchi via harsh)

    MAPREDUCE-3478. Cannot build against ZooKeeper 3.4.0. (Tom White via mahadev)

    MAPREDUCE-3528. Fixed TaskHeartBeatHandler to use a new configuration
    for the thread loop interval separate from task-timeout configuration
    property. (Siddharth Seth via vinodkv)

    MAPREDUCE-3312. Modified MR AM to not send a stop-container request for
    a container that isn't launched at all. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-3382. Enhanced MR AM to use a proxy to ping the job-end
    notification URL. (Ravi Prakash via vinodkv)

    MAPREDUCE-3299. Added AMInfo table to the MR AM job pages to list all the
    job-attempts when AM restarts and recovers. (Jonathan Eagles via vinodkv)

    MAPREDUCE-3251. Network ACLs can prevent some clients to talk to MR AM.
    Improved the earlier patch to not to JobHistoryServer repeatedly.
    (Anupam Seth via vinodkv)

    MAPREDUCE-3553. Add support for data returned when exceptions thrown from web 
    service apis to be in either xml or in JSON. (Thomas Graves via mahadev)

    MAPREDUCE-3641. Making CapacityScheduler more conservative so as to 
    assign only one off-switch container in a single scheduling
    iteration. (Arun C Murthy via vinodkv)

    MAPREDUCE-3692. yarn-resourcemanager out and log files can get big. (eli)

    MAPREDUCE-3710. Improved FileInputFormat to return better locality for the
    last split. (Siddarth Seth via vinodkv)

    MAPREDUCE-2765. DistCp Rewrite. (Mithun Radhakrishnan via mahadev)

    MAPREDUCE-3737. The Web Application Proxy's is not documented very well.
    (Robert Evans via mahadev)

    MAPREDUCE-3699. Increased RPC handlers for all YARN servers to reasonable
    values for working at scale. (Hitesh Shah via vinodkv)

    MAPREDUCE-3693. Added mapreduce.admin.user.env to mapred-default.xml.
    (Roman Shapshonik via acmurthy) 

    MAPREDUCE-3732. Modified CapacityScheduler to use only users with pending
    requests for computing user-limits. (Arun C Murthy via vinodkv)

    MAPREDUCE-3679. AM logs and others should not automatically refresh after every 1 
    second. (Vinod KV  via mahadev)

    MAPREDUCE-3754. Modified RM UI to filter applications based on state of the
    applications. (vinodkv)

    MAPREDUCE-3774. Moved yarn-default.xml to hadoop-yarn-common from
    hadoop-server-common. (Mahadev Konar via vinodkv)

    MAPREDUCE-3771. Un-deprecated the old mapred apis, port of MAPREDUCE-1735.
    (acmurthy)

    MAPREDUCE-3784. Fixed CapacityScheduler so that maxActiveApplications and
    maxActiveApplicationsPerUser per queue are not too low for small
    clusters. (Arun C Murthy via vinodkv)

  OPTIMIZATIONS

    MAPREDUCE-3567. Extraneous JobConf objects in AM heap. (Vinod Kumar
    Vavilapalli via sseth)

    MAPREDUCE-3399. Modifying ContainerLocalizer to send a heartbeat to NM
    immediately after downloading a resource instead of always waiting for a
    second. (Siddarth Seth via vinodkv)

    MAPREDUCE-3568. Optimized Job's progress calculations in MR AM. (vinodkv)

    MAPREDUCE-3569. TaskAttemptListener holds a global lock for all
    task-updates. (Vinod Kumar Vavilapalli via sseth)

    MAPREDUCE-3511. Removed a multitude of cloned/duplicate counters in the AM
    thereby reducing the AM heap size and preventing full GCs. (vinodkv)

    MAPREDUCE-3618. Fixed TaskHeartbeatHandler to not hold a global lock for all
    task-updates. (Siddarth Seth via vinodkv)

    MAPREDUCE-3512. Batching JobHistory flushing to DFS so that we don't flush
    for every event slowing down AM. (Siddarth Seth via vinodkv)

    MAPREDUCE-3718. Change default AM heartbeat interval to 1 second. (Hitesh
    Shah via sseth)

    MAPREDUCE-3360. Added information about lost/rebooted/decommissioned nodes
    on the webapps. (Bhallamudi Venkata Siva Kamesh and Jason Lowe via vinodkv)

    MAPREDUCE-3756. Made single shuffle limit configurable. (Hitesh Shah via
    acmurthy) 

    MAPREDUCE-3811. Made jobclient-to-AM retries configurable. (sseth via
    acmurthy) 

  BUG FIXES

    MAPREDUCE-3757. [Rumen] Fixed Rumen Folder to adjust shuffleFinished and
                    sortFinished times when needed.

    MAPREDUCE-3804. yarn webapp interface vulnerable to cross scripting attacks
    (Dave Thompson via bobby)

    MAPREDUCE-2784. [Gridmix] Bug fixes in ExecutionSummarizer and 
                    ResourceUsageMatcher. (amarrk)

    MAPREDUCE-3194. "mapred mradmin" command is broken in mrv2
                     (Jason Lowe via bobby)

    MAPREDUCE-3462. Fix Gridmix JUnit testcase failures. 
                    (Ravi Prakash and Ravi Gummadi via amarrk)

    MAPREDUCE-2950. [Rumen] Fixed TestUserResolve. (Ravi Gummadi via amarrk)

    MAPREDUCE-3412. Fix 'ant docs'. (amarrk)

    MAPREDUCE-3346 [Rumen] LoggedTaskAttempt#getHostName() returns null. (amarrk)

    MAPREDUCE-3221. Reenabled the previously ignored test in TestSubmitJob
    and fixed bugs in it. (Devaraj K via vinodkv)

    MAPREDUCE-3215. Reenabled and fixed bugs in the failing test
    TestNoJobSetupCleanup. (Hitesh Shah via vinodkv)

    MAPREDUCE-3219. Reenabled and fixed bugs in the failing test
    TestDelegationToken. (Hitesh Shah via vinodkv)

    MAPREDUCE-3217. Reenabled and fixed bugs in the failing ant test
    TestAuditLogger. (Devaraj K via vinodkv)

    MAPREDUCE-3291. App fail to launch due to delegation token not 
    found in cache (Robert Evans via mahadev)

    MAPREDUCE-3344. o.a.h.mapreduce.Reducer since 0.21 blindly casts to
    ReduceContext.ValueIterator. (Brock Noland via tomwhite)

    MAPREDUCE-3342. Fixed JobHistoryServer to also show the job's queue
    name. (Jonathan Eagles via vinodkv)

    MAPREDUCE-3345. Fixed a race condition in ResourceManager that was causing
    TestContainerManagerSecurity to fail sometimes. (Hitesh Shah via vinodkv)

    MAPREDUCE-3368. Fixed test compilation. (Hitesh Shah via vinodkv)

    MAPREDUCE-3333. Fixed bugs in ContainerLauncher of MR AppMaster due to
    which per-container connections to NodeManager were lingering long enough
    to hit the ulimits on number of processes. (vinodkv)

    MAPREDUCE-3392. Fixed Cluster's getDelegationToken's API to return null
    when there isn't a supported token. (John George via vinodkv)

    MAPREDUCE-3379. Fixed LocalResourceTracker in NodeManager to remove deleted
    cache entries correctly. (Siddharth Seth via vinodkv)

    MAPREDUCE-3324. Not All HttpServer tools links (stacks,logs,config,metrics) are 
    accessible through all UI servers (Jonathan Eagles via mahadev)

    MAPREDUCE-3355. Fixed MR AM's ContainerLauncher to handle node-command
    timeouts correctly. (vinodkv)

    MAPREDUCE-3407. Fixed pom files to refer to the correct MR app-jar needed
    by the integration tests. (Hitesh Shah via vinodkv)

    MAPREDUCE-3437. Fix examples pom to refer to the correct 0.23 snapshot
    version. (Jonathan Eagles via todd)

    MAPREDUCE-3434. Nightly build broken (Hitesh Shah via mahadev)

    MAPREDUCE-3447. mapreduce examples not working (mahadev)

    MAPREDUCE-3444. trunk/0.23 builds broken (Hitesh Shah via mahadev)

    MAPREDUCE-3454. [Gridmix] TestDistCacheEmulation is broken (Hitesh Shah
    via mahadev)

    MAPREDUCE-3408. yarn-daemon.sh unconditionnaly sets yarn.root.logger 
    (Bruno Mahe via mahadev)

    MAPREDUCE-3329. Fixed CapacityScheduler to ensure maximum-capacity cannot
    be lesser than capacity for any queue. (acmurthy)

    MAPREDUCE-3464. mapreduce jsp pages missing DOCTYPE. (Dave Vronay via mattf)

    MAPREDUCE-3265. Removed debug logs during job submission to LOG.debug to
    cut down noise. (acmurthy) 

    MAPREDUCE-3468. Changed ant based infrastructure to use 0.23.1 version.
    (sseth via acmurthy) 

    MAPREDUCE-3433. Finding counters by legacy group name returns empty
    counters. (tomwhite)

    MAPREDUCE-3450. NM port info no longer available in JobHistory.
    (Siddharth Seth via mahadev)

    MAPREDUCE-3477. Hadoop site documentation cannot be built anymore. 
    (jeagles via tucu)

    MAPREDUCE-3488. Streaming jobs are failing because the main class
    isnt set in the pom files. (mahadev)
 
    MAPREDUCE-3463. Second AM fails to recover properly when first AM is killed with
    java.lang.IllegalArgumentException causing lost job. (Siddharth Seth via mahadev)

    MAPREDUCE-3452. fifoscheduler web ui page always shows 0% used for the queue.
    (Jonathan Eagles via mahadev)

    MAPREDUCE-3443. JobClient and Job should function in the context of the
    UGI which created them. (Mahadev Konar via sseth)

    MAPREDUCE-3460. MR AM can hang if containers are allocated on a node
    blacklisted by the AM. (Hitesh Shah and Robert Joseph Evans via sseth)

    MAPREDUCE-3453. RM web ui application details page shows RM cluster about
    information. (Jonathan Eagles via sseth)

    MAPREDUCE-3479. JobClient#getJob cannot find local jobs. (tomwhite)

    MAPREDUCE-3500. MRJobConfig creates an LD_LIBRARY_PATH using the platform ARCH. (tucu)

    MAPREDUCE-3456. $HADOOP_PREFIX/bin/yarn should set defaults for 
    $HADOOP_*_HOME (Eric Payne via mahadev)

    MAPREDUCE-3458. Fix findbugs warnings in hadoop-examples. (Devaraj K
    via mahadev)

    MAPREDUCE-3485. DISKS_FAILED -101 error code should be defined in same location as 
    ABORTED_CONTAINER_EXIT_STATUS. (Ravi Gummadi via mahadev)

    MAPREDUCE-3389. MRApps loads the 'mrapp-generated-classpath' file with 
    classpath from the build machine. (tucu)

    MAPREDUCE-3496. Fixed client to print queue acls in consistent order.
    (Jonathan Eagles via acmurthy) 

    MAPREDUCE-3147. Handle leaf queues with the same name properly.
    (Ravi Prakash via mahadev)

    MAPREDUCE-3327. RM web ui scheduler link doesn't show correct max value 
    for queues (Anupam Seth via mahadev)

    MAPREDUCE-3513. Capacity Scheduler web UI has a spelling mistake for Memory.
    (chackaravarthy via mahadev)

    MAPREDUCE-3519. Fixed a deadlock in NodeManager LocalDirectories's handling
    service. (Ravi Gummadi via vinodkv)

    MAPREDUCE-3527. Fix minor API incompatibilities between 1.0 and 0.23.
    (tomwhite)

    MAPREDUCE-3328. mapred queue -list output inconsistent and missing child 
    queues. (Ravi Prakash via mahadev)

    MAPREDUCE-3510. Capacity Scheduler inherited ACLs not displayed by mapred queue 
    -showacls (Jonathan Eagles via mahadev)

    MAPREDUCE-3537. Fix race condition in DefaultContainerExecutor which led
    to container localization occuring in wrong directories. (acmurthy)

    MAPREDUCE-3542. Support "FileSystemCounter" legacy counter group name for
    compatibility. (tomwhite)

    MAPREDUCE-3426. Fixed MR AM in uber mode to write map intermediate outputs
    in the correct directory to work properly in secure mode. (Hitesh Shah via
    vinodkv)

    MAPREDUCE-3544. gridmix build is broken, requires hadoop-archives to be 
    added as ivy dependency. (tucu)

    MAPREDUCE-3557. MR1 test fail to compile because of missing hadoop-archives 
    dependency. (tucu)

    MAPREDUCE-3541. Fix broken TestJobQueueClient test. (Ravi Prakash via 
    mahadev)

    MAPREDUCE-3398. Fixed log aggregation to work correctly in secure mode.
    (Siddharth Seth via vinodkv)

    MAPREDUCE-3530. Fixed an NPE occuring during scheduling in the
    ResourceManager. (Arun C Murthy via vinodkv)

    MAPREDUCE-3484. Fixed JobEndNotifier to not get interrupted before completing
    all its retries. (Ravi Prakash via vinodkv)

    MAPREDUCE-3531. Fixed a race in ContainerTokenSecretManager. (Robert Joseph
    Evans via sseth)

    MAPREDUCE-3560. TestRMNodeTransitions is failing on trunk. 
    (Siddharth Seth via mahadev)

    MAPREDUCE-3487. Fixed JobHistory web-UI to display links to single task's
    counters' page. (Jason Lowe via vinodkv)

    MAPREDUCE-3564. Fixed failures in TestStagingCleanup and TestJobEndNotifier
    tests. (Siddharth Seth via vinodkv)

    MAPREDUCE-3422. Counter display names are not being picked up. (Jonathan
    Eagles via sseth)

    MAPREDUCE-3366. Mapreduce component should use consistent directory structure 
    layout as HDFS/common (Eric Yang via mahadev)

    MAPREDUCE-3387. Fixed AM's tracking URL to always go through the proxy, even
    before the job started, so that it works properly with oozie throughout
    the job execution. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-3579. ConverterUtils shouldn't include a port in a path from a url 
    without a port. (atm via harsh)

    MAPREDUCE-3563. Fixed LocalJobRunner to work correctly with new mapreduce
    apis. (acmurthy)

    MAPREDUCE-3376. Fixed Task to ensure it passes reporter to combiners using
    old MR api. (Subroto Sanyal via acmurthy)

    MAPREDUCE-3339. Fixed MR AM to stop considering node blacklisting after the
    number of nodes blacklisted crosses a threshold. (Siddharth Seth via vinodkv)

    MAPREDUCE-3588. Fixed bin/yarn which was broken by MAPREDUCE-3366 so that
    yarn daemons can start. (Arun C Murthy via vinodkv)

    MAPREDUCE-3349. Log rack-name in JobHistory for unsuccessful tasks. (Amar
    Kamat and Devaraj K via sseth)

    MAPREDUCE-3586. Modified CompositeService to avoid duplicate stop operations
    thereby solving race conditions in MR AM shutdown. (vinodkv)

    MAPREDUCE-3604. Fixed streaming to use new mapreduce.framework.name to
    check for local mode. (acmurthy) 

    MAPREDUCE-3521. Fixed streaming to ensure it doesn't silently ignore
    unknown arguments. (Robert Evans via acmurthy) 

    MAPREDUCE-3522. Ensure queues inherit ACLs from parent if they aren't
    explicitly specified. (Jonathan Eagles via acmurthy) 

    MAPREDUCE-3608. Fixed compile issue with MAPREDUCE-3522. (mahadev via
    acmurthy) 

    MAPREDUCE-3490. Fixed MapReduce AM to count failed maps also towards Reduce
    ramp up. (Sharad Agarwal and Arun C Murthy via vinodkv)

    MAPREDUCE-3529. TokenCache does not cache viewfs credentials correctly
    (sseth)

    MAPREDUCE-3595. Add missing TestCounters#testCounterValue test from branch
    1 to 0.23 (Tom White via sseth)

    MAPREDUCE-3566. Fixed MR AM to construct CLC only once across all tasks.
    (vinodkv via acmurthy) 

    MAPREDUCE-3572. Moved AM event dispatcher to a separate thread for
    performance reasons. (vinodkv via acmurthy) 

    MAPREDUCE-3615. Fix some ant test failures. (Thomas Graves via sseth)

    MAPREDUCE-1744. DistributedCache creates its own FileSytem instance when 
    adding a file/archive to the path. (Dick King via tucu)

    MAPREDUCE-3326. Added detailed information about queue's to the
    CapacityScheduler web-ui. (Jason Lowe via acmurthy) 

    MAPREDUCE-3548. Added more unit tests for MR AM & JHS web-services.
    (Thomas Graves via acmurthy) 

    MAPREDUCE-3617. Removed wrong default value for
    yarn.resourcemanager.principal and yarn.nodemanager.principal. (Jonathan
    Eagles via acmurthy) 

    MAPREDUCE-3624. Remove unnecessary dependency on JDK's tools.jar. (mahadev
    via acmurthy)

    MAPREDUCE-3616. Thread pool for launching containers in MR AM not
    expanding as expected. (vinodkv via sseth)

    MAPREDUCE-3639. Fixed TokenCache to work with absent FileSystem canonical
    service-names. (Siddharth Seth via vinodkv)

    MAPREDUCE-3380. Token infrastructure for running clients which are not kerberos 
    authenticated. (mahadev)

    MAPREDUCE-3648. TestJobConf failing. (Thomas Graves via mahadev)

    MAPREDUCE-3651. TestQueueManagerRefresh fails. (Thomas Graves via mahadev)

    MAPREDUCE-3645. TestJobHistory fails. (Thomas Graves via mahadev)
  
    MAPREDUCE-3652. org.apache.hadoop.mapred.TestWebUIAuthorization.testWebUIAuthorization 
    fails. (Thomas Graves via mahadev)

    MAPREDUCE-3625. CapacityScheduler web-ui display of queue's used capacity is broken.
    (Jason Lowe via mahadev)

    MAPREDUCE-3596. Fix scheduler to handle cleaned up containers, which NMs
    may subsequently report as running. (Vinod Kumar Vavilapalli via sseth)

    MAPREDUCE-3656. Fixed a race condition in MR AM which is failing the sort
    benchmark consistently. (Siddarth Seth via vinodkv)

    MAPREDUCE-3532. Modified NM to report correct http address when an ephemeral
    web port is configured. (Bhallamudi Venkata Siva Kamesh via vinodkv)

    MAPREDUCE-3404. Corrected MR AM to honor speculative configuration and enable
    speculating either maps or reduces. (Eric Payne via vinodkv)

    MAPREDUCE-3664. Federation Documentation has incorrect configuration example.
    (Brandon Li via jitendra)

    MAPREDUCE-3649. Job End notification gives an error on calling back.
    (Ravi Prakash via mahadev)

    MAPREDUCE-3657. State machine visualize build fails. (Jason Lowe 
    via mahadev)

    MAPREDUCE-2450. Fixed a corner case with interrupted communication threads
    leading to a long timeout in Task. (Rajesh Balamohan via acmurthy)

    MAPREDUCE-3669. Allow clients to talk to MR HistoryServer using both
    delegation tokens and kerberos. (mahadev via acmurthy)

    MAPREDUCE-3684. LocalDistributedCacheManager does not shut down its thread
    pool (tomwhite)

    MAPREDUCE-3582. Move successfully passing MR1 tests to MR2 maven tree.
    (ahmed via tucu)

    MAPREDUCE-3698. Client cannot talk to the history server in secure mode.
    (mahadev)

    MAPREDUCE-3689. RM web UI doesn't handle newline in job name.
    (Thomas Graves via mahadev)

    MAPREDUCE-3701. Delete HadoopYarnRPC from 0.23 branch.
    (mahadev)

    MAPREDUCE-3549. write api documentation for web service apis for RM, NM, 
    mapreduce app master, and job history server (Thomas Graves via mahadev)

    MAPREDUCE-3705. ant build fails on 0.23 branch. (Thomas Graves via
    mahadev)
 
    MAPREDUCE-3691. webservices add support to compress response.
    (Thomas Graves via mahadev)

    MAPREDUCE-3702. internal server error trying access application master 
    via proxy with filter enabled (Thomas Graves via mahadev)

    MAPREDUCE-3646. Remove redundant URL info from "mapred job" output.
    (Jonathan Eagles via mahadev)

    MAPREDUCE-3681. Fixed computation of queue's usedCapacity. (acmurthy) 

    MAPREDUCE-3505. yarn APPLICATION_CLASSPATH needs to be overridable. 
    (ahmed via tucu)

    MAPREDUCE-3714. Fixed EventFetcher and Fetcher threads to shut-down properly
    so that reducers don't hang in corner cases. (vinodkv)

    MAPREDUCE-3712. The mapreduce tar does not contain the hadoop-mapreduce-client-
    jobclient-tests.jar. (mahadev)

    MAPREDUCE-3717. JobClient test jar has missing files to run all the test programs.
    (mahadev)

    MAPREDUCE-3630. Fixes a NullPointer exception while running TeraGen - if a
    map is asked to generate 0 records. (Mahadev Konar via sseth)

    MAPREDUCE-3683. Fixed maxCapacity of queues to be product of parent
    maxCapacities. (acmurthy)

    MAPREDUCE-3713. Fixed the way head-room is allocated to applications by
    CapacityScheduler so that it deducts current-usage per user and not
    per-application. (Arun C Murthy via vinodkv)

    MAPREDUCE-3721. Fixed a race in shuffle which caused reduces to hang.
    (sseth via acmurthy) 

    MAPREDUCE-3733. Add Apache License Header to hadoop-distcp/pom.xml.
    (mahadev)

    MAPREDUCE-3735. Add distcp jar to the distribution (tar).
    (mahadev)

    MAPREDUCE-3720. Changed bin/mapred job -list to not print job-specific
    information not available at RM. (vinodkv via acmurthy) 

    MAPREDUCE-3742. "yarn logs" command fails with ClassNotFoundException.
    (Jason Lowe via mahadev)

    MAPREDUCE-3703. ResourceManager should provide node lists in JMX output.
    (Eric Payne via mahadev)

    MAPREDUCE-3716. Fixing YARN+MR to allow MR jobs to be able to use
    java.io.File.createTempFile to create temporary files as part of their
    tasks. (Jonathan Eagles via vinodkv)

    MAPREDUCE-3748. Changed a log in CapacityScheduler.nodeUpdate to debug.
    (ramya via acmurthy) 

    MAPREDUCE-3764. Fixed resource usage metrics for queues and users.
    (acmurthy)

    MAPREDUCE-3749. ConcurrentModificationException in counter groups.
    (tomwhite)

    MAPREDUCE-3762. Fixed default CapacityScheduler configs. (mahadev via
    acmurthy) 

    MAPREDUCE-3499. New MiniMR does not setup proxyuser configuration 
    correctly, thus tests using doAs do not work. (johnvijoe via tucu)

    MAPREDUCE-3696. MR job via oozie does not work on hadoop 23.
    (John George via mahadev)

    MAPREDUCE-3427. Fix streaming unit tests broken after mavenization.
    (Hitesh Shah via acmurthy) 

    MAPREDUCE-3640. Allow AMRecovery to work with partial JobHistory files.
    (Arun C Murthy via sseth)

    MAPREDUCE-3752. Modified application limits to include queue max-capacities
    besides the usual user limits. (Arun C Murthy via vinodkv)

    MAPREDUCE-3744. Fix the yarn logs command line. Improve error messages for
    mapred job -logs. (Jason Lowe via sseth)

    MAPREDUCE-3780. Fixed a bug where applications killed before getting
    activated were not getting cleaned up properly. (Hitesh Shah via acmurthy)

    MAPREDUCE-3708. Metrics: Incorrect Apps Submitted Count (Bhallamudi via 
    mahadev)

    MAPREDUCE-3727. jobtoken location property in jobconf refers to wrong 
    jobtoken file (tucu)

    MAPREDUCE-3711. Fixed MR AM recovery so that only single selected task
    output is recovered and thus reduce the unnecessarily bloated recovery
    time. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-3760. Changed active nodes list to not contain unhealthy nodes
    on the webUI and metrics. (vinodkv)

    MAPREDUCE-3417. Fixed job-access-controls to work with MR AM and
    JobHistoryServer web-apps. (Jonathan Eagles via vinodkv)

    MAPREDUCE-3803. Fix broken build of raid contrib due to HDFS-2864.
    (Ravi Prakash via suresh)

    MAPREDUCE-3791. can't build site in hadoop-yarn-server-common.
    (mahadev)

    MAPREDUCE-3723. TestAMWebServicesJobs & TestHSWebServicesJobs 
    incorrectly asserting tests (Bhallamudi Venkata Siva Kamesh
    via mahadev)

    MAPREDUCE-3795. "job -status" command line output is malformed.
    (vinodkv via mahadev)

    MAPREDUCE-3759. ClassCastException thrown in -list-active-trackers when 
    there are a few unhealthy nodes (vinodkv via mahadev)

    MAPREDUCE-3775. Change MiniYarnCluster to escape special chars in testname.
    (Hitesh Shah via mahadev)

    MAPREDUCE-3765. FifoScheduler does not respect yarn.scheduler.fifo.minimum-
    allocation-mb setting (Hitesh Shah via mahadev)

    MAPREDUCE-3747. Initialize queue metrics upfront and added start/finish
    time to RM Web-UI. (acmurthy) 

    MAPREDUCE-3814. Fixed MRV1 compilation. (Arun C Murthy via vinodkv)

    MAPREDUCE-3810. Performance tweaks - reduced logging in AM and defined
    hascode/equals for ResourceRequest & Priority. (vinodkv via acmurthy) 

    MAPREDUCE-3813. Added a cache for resolved racks. (vinodkv via acmurthy)   

    MAPREDUCE-3808. Fixed an NPE in FileOutputCommitter for jobs with maps
    but no reduces. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-3354. Changed scripts so that jobhistory server is started by
    bin/mapred instead of bin/yarn. (Jonathan Eagles via acmurthy) 

    MAPREDUCE-3809. Ensure that there is no needless sleep in Task at the end
    of the task. (sseth via acmurthy)

    MAPREDUCE-3794. Support mapred.Task.Counter and mapred.JobInProgress.Counter 
    enums for compatibility (Tom White via mahadev)

    MAPREDUCE-3697. Support binary compatibility for Counters after
    MAPREDUCE-901. (mahadev via acmurthy) 

  
    MAPREDUCE-3817. Fixed bin/mapred to allow running of distcp and archive
    jobs. (Arpit Gupta via acmurthy) 

    MAPREDUCE-3709. TestDistributedShell is failing. (Hitesh Shah via 
    mahadev)

    MAPREDUCE-3436. JobHistory webapp address should use the host configured
    in the jobhistory address. (Ahmed Radwan via sseth)

    MAPREDUCE-3815. Fixed MR AM to always use hostnames and never IPs when
    requesting containers so that scheduler can give off data local containers
    correctly. (Siddarth Seth via vinodkv)
 
    MAPREDUCE-3833. Fixed a bug in reinitiaziling of queues. (Jason Lowe via
    acmurthy) 

    MAPREDUCE-3826. Fixed a bug in RM web-ui which broke sorting. (Jonathan
    Eagles via acmurthy)

    MAPREDUCE-3823. Ensure counters are calculated only once after a job
    finishes. (Vinod Kumar Vavilapalli via sseth)

    MAPREDUCE-3827. Changed Counters to use ConcurrentSkipListMap for
    performance. (vinodkv via acmurthy)  

    MAPREDUCE-3822. Changed FS counter computation to use all occurences of
    the same FS scheme, instead of randomly using one. (Mahadev Konar via
    sseth)

    MAPREDUCE-3834. Changed MR AM to not add the same rack entry multiple times
    into the container request table when multiple hosts for a split happen to
    be on the same rack. (Siddarth Seth via vinodkv)

    MAPREDUCE-3828. Ensure that urls in single-node mode are correct. (sseth
    via acmurthy) 

    MAPREDUCE-3770. Zombie.getJobConf() results into NPE. (amarrk)

    MAPREDUCE-3840.  JobEndNotifier doesn't use the proxyToUse during connecting
    (Ravi Prakash via bobby)

    MAPREDUCE-3843. Job summary log file found missing on the RM host 
    (Anupam Seth via tgraves)

    MAPREDUCE-3846. Addressed MR AM hanging issues during AM restart and then
    the recovery. (vinodkv)

    MAPREDUCE-3802. Added test to validate that AM can crash multiple times and
    still can recover successfully after MAPREDUCE-3846. (vinodkv)

    MAPREDUCE-3858. Task attempt failure during commit results in task never completing.
    (Tom White via mahadev)

    MAPREDUCE-3856. Instances of RunningJob class givs incorrect job tracking
    urls when mutiple jobs are submitted from same client jvm. (Eric Payne via 
    sseth)

    MAPREDUCE-3880. Changed LCE binary to be 32-bit. (acmurthy)

Release 0.23.0 - 2011-11-01 

  INCOMPATIBLE CHANGES

    MAPREDUCE-2455. Remove deprecated JobTracker.State in favour of
    JobTrackerStatus. (tomwhite)

    MAPREDUCE-2430. Remove mrunit contrib. (nigel via eli)

    MAPREDUCE-2606. Remove IsolationRunner. (Alejandro Abdelnur via eli)

  NEW FEATURES

    MAPREDUCE-2682. Add "mapred classpath" command to print classpath
    for MR applications. (vinodkv via acmurthy) 

    MAPREDUCE-2107. [Gridmix] Total heap usage emulation in Gridmix.
    (Amar Kamat and Ravi Gummadi via amarrk)

    MAPREDUCE-2106. [Gridmix] Cumulative CPU usage emulation in Gridmix. 
    (amarrk)

    MAPREDUCE-2543. [Gridmix] High-Ram feature emulation in Gridmix. (amarrk)

    MAPREDUCE-2408. [Gridmix] Compression emulation in Gridmix. (amarrk)

    MAPREDUCE-2473. Add "mapred groups" command to query the server-side groups
    resolved for a user. (Aaron T. Myers via todd)

    MAPREDUCE-461. Enable ServicePlugins for the JobTracker.
    (Fredrik Hedberg via tomwhite)

    MAPREDUCE-2521. Create RPM and Debian packages for MapReduce. Changes 
    deployment layout to be consistent across the binary tgz, rpm, and deb.
    (Eric Yang via omalley)

    MAPREDUCE-2323. Add metrics to the fair scheduler. (todd)

    MAPREDUCE-2037. Capture intermediate progress, CPU and memory usage for
    tasks. (Dick King via acmurthy) 

    MAPREDUCE-279. MapReduce 2.0. Merging MR-279 branch into trunk. Contributed by
    Arun C Murthy, Christopher Douglas, Devaraj Das, Greg Roelofs, Jeffrey
    Naisbitt, Josh Wills, Jonathan Eagles, Krishna Ramachandran, Luke Lu, Mahadev
    Konar, Robert Evans, Sharad Agarwal, Siddharth Seth, Thomas Graves, and Vinod
    Kumar Vavilapalli.

    MAPREDUCE-2930. Added the ability to be able to generate graphs from the
    state-machine definitions. (Binglin Chang via vinodkv)

    MAPREDUCE-2719. Add a simple, DistributedShell, application to illustrate
    alternate frameworks on YARN. (Hitesh Shah via acmurthy)

    MAPREDUCE-3104. Implemented Application-acls. (vinodkv)

    MAPREDUCE-2708. Designed and implemented MR Application Master recovery to
    make MR AMs resume their progress after restart. (Sharad Agarwal via vinodkv)

    MAPREDUCE-2858. Added a WebApp Proxy for applications. (Robert Evans via
    acmurthy) 

  IMPROVEMENTS

    MAPREDUCE-2187. Reporter sends progress during sort/merge. (Anupam Seth via
    acmurthy) 

    MAPREDUCE-2365. Add counters to track bytes (read,written) via 
    File(Input,Output)Format. (Siddharth Seth via acmurthy)
 
    MAPREDUCE-2680. Display queue name in job client CLI. (acmurthy) 
 
    MAPREDUCE-2679. Minor changes to sync trunk with MR-279 branch. (acmurthy) 
 
    MAPREDUCE-2400. Remove Cluster's dependency on JobTracker via a 
    ServiceProvider for the actual implementation. (tomwhite via acmurthy) 
 
    MAPREDUCE-2596. [Gridmix] Summarize Gridmix runs. (amarrk)

    MAPREDUCE-2563. [Gridmix] Add High-Ram emulation system tests to 
    Gridmix. (Vinay Kumar Thota via amarrk)

    MAPREDUCE-2104. [Rumen] Add Cpu, Memory and Heap usages to 
    TraceBuilder's output. (amarrk)

    MAPREDUCE-2554. [Gridmix]  Add distributed cache emulation system tests 
    to Gridmix. (Vinay Kumar Thota via amarrk)
 
    MAPREDUCE-2543. [Gridmix] High-Ram feature emulation testcase. (amarrk)

    MAPREDUCE-2469. Task counters should also report the total heap usage of 
    the task. (Ravi Gummadi and Amar Ramesh Kamat via amarrk)

    MAPREDUCE-2544. [Gridmix] Add compression emulation system tests to 
    Gridmix. (Vinay Kumar Thota via amarrk)

    MAPREDUCE-2517. [Gridmix] Add system tests to Gridmix. 
    (Vinay Kumar Thota via amarrk)

    MAPREDUCE-2492. The new MapReduce API should make available task's
    progress to the task. (amarrk)

    MAPREDUCE-2153. Bring in more job configuration properties in to the trace 
    file. (Rajesh Balamohan via amarrk)

    MAPREDUCE-1461. Feature to instruct rumen-folder utility to skip jobs worth 
    of specific duration. (Rajesh Balamohan via amarrk)

    MAPREDUCE-2172. Added test-patch.properties required by test-patch.sh 
    (nigel)

    MAPREDUCE-2156. Raid-aware FSCK. (Patrick Kling via dhruba)

    MAPREDUCE-2215. A more elegant FileSystem#listCorruptFileBlocks API
    (RAID changes) (Patrick Kling via hairong)

    MAPREDUCE-1831. BlockPlacement policy for HDFS-RAID.
    (Scott Chen via dhruba)

    MAPREDUCE-1906. Lower minimum heartbeat interval for TaskTracker
    (Scott Carey and Todd Lipcon via todd)

    MAPREDUCE-1382. MRAsyncDiscService should tolerate missing local.dir.
    (Zheng Shao and tomwhite via tomwhite)

    MAPREDUCE-2263. MapReduce side of HADOOP-6904: RPC compatibility.
    (hairong)

    MAPREDUCE-1706. Log RAID recoveries on HDFS. (schen)

    MAPREDUCE-2334. Update BlockPlacementPolicyRaid for the new method
    in BlockPlacementPolicy.  (szetszwo)

    MAPREDUCE-2254. Allow setting of end-of-record delimiter for
    TextInputFormat (Ahmed Radwan via todd)

    MAPREDUCE-1927. Unit test for HADOOP-6835 (concatenated gzip support).
    (Greg Roelofs via tomwhite)

    MAPREDUCE-2206. The task-cleanup tasks should be optional. (schen)

    MAPREDUCE-2225. MultipleOutputs should not require the use of 'Writable'.
    (Harsh J Chouraria via tomwhite)

    MAPREDUCE-1811. Job.monitorAndPrintJob() should print status of the job
    at completion. (Harsh J Chouraria via tomwhite)

    MAPREDUCE-993. bin/hadoop job -events <jobid> <from-event-#> <#-of-events>
    help message is confusing. (Harsh J Chouraria via tomwhite)

    MAPREDUCE-2302. Add static factory methods in GaloisField. (schen)

    MAPREDUCE-2351. mapred.job.tracker.history.completed.location should
    support an arbitrary filesystem URI. (tomwhite)

    MAPREDUCE-2239. BlockPlacementPolicyRaid should call getBlockLocations
    only when necessary. (schen)

    MAPREDUCE-2331. Add coverage of task graph servlet to fair scheduler system
    test. (todd)

    MAPREDUCE-2367. Allow using a file to exclude certain tests from build.
    (todd)

    MAPREDUCE-2202. Generalize CLITest structure and interfaces to faciliate
    upstream adoption (e.g. for web or system testing). (cos)

    MAPREDUCE-2420. JobTracker should be able to renew delegation token over 
    HTTP (Boris Shkolnik via jitendra)

    MAPREDUCE-2474. Add docs to the new API Partitioner on how to access the
    Job Configuration. (Harsh J Chouraria via todd)
    
    MAPREDUCE-2475. Disable IPV6 for junit tests. (suresh srinivas via mahadev)

    MAPREDUCE-2422. Removed unused internal methods from DistributedCache.
    (tomwhite)

    MAPREDUCE-2456. Log the reduce taskID and associated TaskTrackers with
    failed fetch notifications in the JobTracker log.
    (Jeffrey Naisbitt via cdouglas)

    MAPREDUCE-869. Documentation for config to set map/reduce task environment
    (Alejandro Abdelnur via todd)

    MAPREDUCE-2410. Add entry to streaming FAQ about how streaming reducers
    receive keys. (Harsh J Chouraria via todd)

    MAPREDUCE-2499. MR part of HADOOP-7291. (eli)

    MAPREDUCE-2497. Missing spaces in error messages. (eli)

    MAPREDUCE-2502. JobSubmitter should use mapreduce.job.maps instead of
    its deprecated equivalent. (eli via todd)

    MAPREDUCE-2381. JobTracker instrumentation not consistent about error
    handling. (Philip Zeyliger via tomwhite)

    MAPREDUCE-2449. Allow for command line arguments when performing
    "Run on Hadoop" action in Eclipse plugin. (Jeff Zemerick via todd)

    MAPREDUCE-2483. Remove duplication of jars between Hadoop subprojects
    from build artifacts. (Eric Yang via omalley)

    MAPREDUCE-2372. TaskLogAppender mechanism shouldn't be set up in
    log4j.properties (todd)

    MAPREDUCE-2516. Rename webinterface.private.actions to
    mapreduce.jobtracker.webinterface.trusted (Ari Rabkin via todd)

    MAPREDUCE-2459. Cache HAR filesystem metadata. (Mac Yang via mahadev)

    HADOOP-7259. Contrib modules should include the build.properties from
    the enclosing hadoop directory. (omalley)

    MAPREDUCE-2494. Order distributed cache deletions by LRU. (Robert Joseph
    Evans via cdouglas)

    MAPREDUCE-2452. Makes the cancellation of delegation tokens happen in a 
    separate thread. (ddas)

    HADOOP-7106. Reorganize project SVN layout to "unsplit" the projects.
    (todd, nigel)

    MAPREDUCE-2249. Check the reflexive property of Counters objects when
    comparing equality. (Devaraj K via todd)

    MAPREDUCE-2623. Update ClusterMapReduceTestCase to use
    MiniDFSCluster.Builder (Harsh J Chouraria via eli)

    MAPREDUCE-2602. Allow setting of end-of-record delimiter for
    TextInputFormat for the old API. (Ahmed Radwan via todd)

    MAPREDUCE-2705. Permits parallel multiple task launches. 
    (Thomas Graves via ddas)

    MAPREDUCE-2489. Jobsplits with random hostnames can make the queue 
    unusable (jeffrey naisbit via mahadev)

    MAPREDUCE-2854. update INSTALL with config necessary run mapred on yarn.
    (thomas graves via mahadev)

    MAPREDUCE-2701. app/Job.java needs UGI for the user that launched it.
    (Robert Evans via mahadev)

    MAPREDUCE-2652. Enabled multiple NMs to be runnable on a single node by
    making shuffle service port to be truely configurable. (Robert Evans via
    vinodkv)

    MAPREDUCE-2735. Add an applications summary log to ResourceManager.
    (Thomas Graves via acmurthy) 

    MAPREDUCE-2697. Enhance CapacityScheduler to cap concurrently running
    applications per-queue & per-user. (acmurthy) 
    Configuration changes:
      add yarn.capacity-scheduler.maximum-am-resource-percent

    MAPREDUCE-2774. Add startup message to ResourceManager & NodeManager on
    startup. (Venu Gopala Rao via acmurthy) 

    MAPREDUCE-2655. Add audit logs to ResourceManager and NodeManager. (Thomas
    Graves via acmurthy)

    MAPREDUCE-2864. Normalize configuration variable names for YARN. (Robert
    Evans via acmurthy) 

    MAPREDUCE-2690. Web-page for FifoScheduler. (Eric Payne via acmurthy) 

    MAPREDUCE-2711. Update TestBlockPlacementPolicyRaid for the new namesystem
    and block management APIs.  (szetszwo)

    MAPREDUCE-2933. Change allocate call to return ContainerStatus for
    completed containers rather than Container. (acmurthy) 

    MAPREDUCE-2675. Reformat JobHistory Server main page to be more
    useful. (Robert Joseph Evans via vinodkv).

    MAPREDUCE-2896. Simplify all apis to in
    org.apache.hadoop.yarn.api.records.* to be get/set only. Added javadocs to
    all public records. (acmurthy)

    MAPREDUCE-2676. MR-279: JobHistory Job page needs reformatted. (Robert Evans via 
    mahadev)

    MAPREDUCE-2899. Replace major parts of ApplicationSubmissionContext with a 
    ContainerLaunchContext (Arun Murthy via mahadev)

    MAPREDUCE-2966. Added ShutDown hooks for MRV2 processes so that they can
    gracefully exit. (Abhijit Suresh Shingate via vinodkv)

    MAPREDUCE-2672. MR-279: JobHistory Server needs Analysis this job. 
    (Robert Evans via mahadev)

    MAPREDUCE-2965. Streamlined the methods hashCode(), equals(), compareTo()
    and toString() for all IDs. (Siddharth Seth via vinodkv)

    MAPREDUCE-2726. Added job-file to the AM and JobHistoryServer web
    interfaces. (Jeffrey Naisbitt via vinodkv)

    MAPREDUCE-2880. Improve classpath-construction for mapreduce AM and
    containers. (Arun C Murthy via vinodkv)

    MAPREDUCE-3055. Simplified ApplicationAttemptId passing to
    ApplicationMaster via environment variable. (vinodkv)

    MAPREDUCE-3092. Removed a special comparator for JobIDs in JobHistory as
    JobIDs are already comparable. (Devaraj K via vinodkv)

    MAPREDUCE-3099. Add docs for setting up a single node MRv2 cluster.
    (mahadev)

    MAPREDUCE-3001. Added task-specific counters to AppMaster and JobHistory
    web-UIs. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-3098. Fixed RM and MR AM to report YarnApplicationState and
    application's FinalStatus separately. (Hitesh Shah via vinodkv)

    MAPREDUCE-2889. Added documentation for writing new YARN applications.
    (Hitesh Shah via acmurthy) 

    MAPREDUCE-3134. Added documentation the CapacityScheduler. (acmurthy) 

    MAPREDUCE-3013. Removed YarnConfiguration.YARN_SECURITY_INFO and its usage
    as it doesn't affect security any more. (vinodkv)

    MAPREDUCE-2907. Changed log level for various messages in ResourceManager
    from INFO to DEBUG. (Ravi Prakash via vinodkv)

    MAPREDUCE-2702. Added a new API in OutputCommitter for recovering
    the outputs of tasks from a crashed job so as to support MR Application
    Master recovery. (Sharad Agarwal and Arun C Murthy via vinodkv)

    MAPREDUCE-2738. Added the missing cluster level statistics on the RM web
    UI. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-2988. Reenabled TestLinuxContainerExecutor reflecting the
    current NodeManager code. (Robert Joseph Evans via vinodkv) 

    MAPREDUCE-3161. Improved some javadocs and fixed some typos in
    YARN. (Todd Lipcon via vinodkv)

    MAPREDUCE-3148. Ported MAPREDUCE-2702 to old mapred api for aiding task
    recovery. (acmurthy) 

    MAPREDUCE-3133. Running a set of methods in a Single Test Class.
    (Jonathan Eagles via mahadev)

    MAPREDUCE-3059. QueueMetrics do not have metrics for aggregate 
    containers-allocated and aggregate containers-released.
    (Devaraj K via mahadev)
   
    MAPREDUCE-3187. Add names for various unnamed threads in MR2.
    (Todd Lipcon and Siddharth Seth via mahadev)

    MAPREDUCE-3136. Added documentation for setting up Hadoop clusters in both
    non-secure and secure mode for both HDFS & YARN. (acmurthy)

    MAPREDUCE-3068. Added a whitelist of environment variables for containers
    from the NodeManager and set MALLOC_ARENA_MAX for all daemons and
    containers. (Chris Riccomini via acmurthy)

    MAPREDUCE-3144. Augmented JobHistory with the information needed for
    serving aggregated logs. (Siddharth Seth via vinodkv)
  
    MAPREDUCE-3163. JobClient spews errors when killing MR2 job.
    (mahadev)

    MAPREDUCE-3239. Use new createSocketAddr API in MRv2 to give better 
    error messages on misconfig (Todd Lipcon via mahadev)

    MAPREDUCE-2747. Cleaned up LinuxContainerExecutor binary sources and changed
    the configuration to use yarn names. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-3205. Fix memory specifications to be physical rather than
    virtual, allowing for a ratio between the two to be configurable. (todd
    via acmurthy) 

    MAPREDUCE-2986. Fixed MiniYARNCluster to support multiple NodeManagers.
    (Anupam Seth via vinodkv)

    MAPREDUCE-2736. Remove unused contrib components dependent on MR1. (eli)

    MAPREDUCE-2989. Modified JobHistory to link to task and AM logs from the
    JobHistoryServer. (Siddharth Seth via vinodkv)

    MAPREDUCE-3014. Rename and invert logic of '-cbuild' profile to 'native' and off 
    by default. (tucu)

    MAPREDUCE-3171. normalize nodemanager native code compilation with common/hdfs
    native. (tucu)

    MAPREDUCE-3146. Added a MR specific command line to dump logs for a
    given TaskAttemptID. (Siddharth Seth via vinodkv)

    MAPREDUCE-3275. Added documentation for AM WebApp Proxy. (Robert Evans via
    acmurthy)

    MAPREDUCE-3322. Added a better index.html and an brief overview of YARN
    architecture. (acmurthy) 

  OPTIMIZATIONS

    MAPREDUCE-2026. Make JobTracker.getJobCounters() and
    JobInProgress.getCounters() aquire locks in a shorter time period.
    (Joydeep Sen Sarma via schen)

    MAPREDUCE-2740. MultipleOutputs in new API creates needless
    TaskAttemptContexts. (todd)

    MAPREDUCE-901. Efficient framework counters. (llu via acmurthy)

    MAPREDUCE-2629. Workaround a JVM class loading quirk which prevents
    JIT compilation of inner classes methods in ReduceContextImpl.

  BUG FIXES

    MAPREDUCE-2603. Disable High-Ram emulation in system tests. 
    (Vinay Kumar Thota via amarrk)

    MAPREDUCE-2539. Fixed NPE in getMapTaskReports in JobClient. (Robert Evans via
    acmurthy) 

    MAPREDUCE-1978. Rumen TraceBuilder should provide recursive
    input folder scanning.

    MAPREDUCE-2416. Remove the restriction of specifying group names in
    users-list file for Gridmix in RoundRobinUserResolver mode.

    MAPREDUCE-2417. Fix Gridmix in RoundRobinUserResolver mode to
    map testing/proxy users to unique users in a trace.

    MAPREDUCE-2307. Exception thrown in Jobtracker logs, when the Scheduler
    configured is FairScheduler. (Devaraj K via matei)

    MAPREDUCE-2199. build is broken 0.22 branch creation. (cos)

    MAPREDUCE-1752. Implement getFileBlockLocations in HarFilesystem.
    (Patrick Kling via dhruba)

    MAPREDUCE-2155. RaidNode should optionally use the mapreduce jobs to 
    fix missing blocks.  (Patrick Kling via dhruba)

    MAPREDUCE-1334. Fix TestIndexUpdater by ignoring _SUCCESS file in HDFS.
    (Kay Kay via yhemanth)

    MAPREDUCE-2232. Add missing methods to TestMapredGroupMappingServiceRefresh.
    (Todd Lipcon via eli)

    MAPREDUCE-2271. Fix TestSetupTaskScheduling failure on trunk.
    (Liyin Liang via todd)

    MAPREDUCE-2290. Fix compilation error in TestTaskCommit. (eli)

    MAPREDUCE-2294. Fix compilation error in mumak. (todd)

    MAPREDUCE-2300. Fix TestUmbilicalProtocolWithJobToken on trunk after
    HADOOP-6904. (todd)

    MAPREDUCE-2296. Fix references to misspelled method name
    getProtocolSigature (todd)

    MAPREDUCE-2311. Fix TestFairScheduler failure (schen)

    MAPREDUCE-1996. API: Reducer.reduce() method detail misstatement.
    (Harsh J Chouraria via tomwhite)

    MAPREDUCE-2203. Wrong javadoc for TaskRunner's appendJobJarClasspaths
    method. (Jingguo Yao via tomwhite)

    MAPREDUCE-2074. Task should fail when symlink creation fails.
    (Priyo Mustafi via tomwhite)

    MAPREDUCE-1242. Chain APIs error misleading.
    (Harsh J Chouraria via tomwhite)

    MAPREDUCE-2379. Adds missing DistributedCache configurations in 
    mapred-default.xml (Todd Lipcon via amareshwari)

    MAPREDUCE-2348. Disable mumak tests on trunk since they currently time out
    (todd)

    MAPREDUCE-2395. TestBlockFixer timing out on trunk. (Ramkumar Vadali via
    todd)

    MAPREDUCE-2426. Make TestFairSchedulerSystem fail with more verbose output
    (todd)

    MAPREDUCE-2448. NoSuchMethodError:
    org.apache.hadoop.hdfs.TestDatanodeBlockScanner.corruptReplica(..) (eli)

    MAPREDUCE-2460. Fix flaky test TestFairSchedulerSystem. (todd)

    MAPREDUCE-2451. Log the details from health check script at the
    JobTracker. (Thomas Graves via cdouglas)

    MAPREDUCE-2467. HDFS-1052 changes break the raid contrib module in 
    MapReduce. (suresh srinivas via mahadev)

    MAPREDUCE-2258. IFile reader closes stream and compressor in wrong order.
    (todd via tomwhite)

    MAPREDUCE-2518. The t flag is missing in distcp help message.  (Wei Yongjun
    via szetszwo)

    MAPREDUCE-2514. Fix typo in TaskTracker ReinitTrackerAction log message.
    (Jonathan Eagles via cdouglas)

    MAPREDUCE-2490. Add logging to graylist and blacklist activity to aid
    diagnosis of related issues. (Jonathan Eagles via cdouglas)

    MAPREDUCE-2495. exit() the TaskTracker when the distributed cache cleanup
    thread dies. (Robert Joseph Evans via cdouglas)

    MAPREDUCE-2470. Fix NPE in RunningJobs::getCounters. (Robert Joseph Evans
    via cdouglas)

    MAPREDUCE-2536. Update FsShell -mv command usage in TestMRCLI.  (Daryn
    Sharp via szetszwo)

    MAPREDUCE-2529. Add support for regex-based shuffle metric counting
    exceptions. (Thomas Graves via cdouglas)

    MAPREDUCE-2559. ant binary fails due to missing c++ lib dir. (eli)

    MAPREDUCE-2573. Fix new findbugs warning introduced by MAPREDUCE-2494.
    (Robert Joseph Evans via todd)

    MAPREDUCE-2581. Spelling errors in log messages. (Tim Sell via eli)

    MAPREDUCE-2588. Change raid to the new DataTransferProtocol API.  (szetszwo)

    MAPREDUCE-2576. Typo in comment in SimulatorLaunchTaskAction.java.
    (Tim Sell via jghoman)

    MAPREDUCE-2550. Fix bin/mapred to work properly from within a source
    checkout (Eric Yang via todd)

    MAPREDUCE-2620. Update RAID for HDFS-2087.  (szetszwo)

    MAPREDUCE-2624. Update RAID for HDFS-2107.  (szetszwo)

    MAPREDUCE-2670. Fixing spelling mistake in FairSchedulerServlet.java. (eli)

    MAPREDUCE-2710. Update JobSubmitter.printTokens(..) for HDFS-2161.
    (szetszwo)

    MAPREDUCE-2409. DistributedCache maps files and archives to the same path,
    despite semantic incompatibility. (Siddharth Seth via cdouglas)

    MAPREDUCE-2575. TestMiniMRDFSCaching fails if test.build.dir is set 
    to something other than build/test (Thomas Graves via mahadev)

    MAPREDUCE-2622. Remove the last remaining reference to the deprecated
    configuration "io.sort.mb". (Harsh J Chouraria via todd)

    MAPREDUCE-2732. Remove directly accessing FSNamesystem.LOG from
    TestCopyFiles and TestDistCh.  (szetszwo)

    MAPREDUCE-2463. Job history files are not moved to done folder when job
    history location is hdfs.  (Devaraj K via szetszwo)

    MAPREDUCE-2243. Close streams propely in a finally-block to avoid leakage
    in CompletedJobStatusStore, TaskLog, EventWriter and TotalOrderPartitioner.
    (Devaraj K via szetszwo)

    MAPREDUCE-2741. Make ant build system work with hadoop-common JAR
    generated by Maven. (Alejandro Abdelnur via tomwhite)

    MAPREDUCE-2760. mapreduce.jobtracker.split.metainfo.maxsize typoed
    in mapred-default.xml. (todd via eli)

    MAPREDUCE-2797. Update mapreduce tests and RAID for HDFS-2239.  (szetszwo)

    MAPREDUCE-2805. Update RAID for HDFS-2241.  (szetszwo)
    
    MAPREDUCE-2837. Ported bug fixes from y-merge to prepare for MAPREDUCE-279
    merge. (acmurthy) 

    MAPREDUCE-2541. Fixed a race condition in IndexCache.removeMap. (Binglin
    Chang via acmurthy) 

    MAPREDUCE-2458. Rename sanitized pom.xml in build directory to work around IDE
    bug (Luke Lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Clear application notification if sent once
    to NodeManager (mahadev)

    MAPREDUCE-2433. YARNApplicationConstants hard code app master jar version (Luke
    Lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Implement restart for resource manager
    phase 1 - Helper classes to store and restore the data structures. (mahadev)

    MAPREDUCE-2414. Change MRv2 to use generic interfaces. (Siddharth Seth via
    acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Implement health-checks for the node -
    server side(ResourceManager) changes. (vinodkv)

    MAPREDUCE-2405: Implement uber-AppMaster (in-cluster LocalJobRunner for MRv2)
    (Greg Roelofs via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Implementing Containers' memory monitoring.
    (vinodkv)

    MAPREDUCE-2440. Name clashes in TypeConverter (luke via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Add fail count to the command line of the
    application master. (mahadev)

    MAPREDUCE-2424. Polish uber-AppMaster: add uber-AM counters and GUI indicators.
    (Greg Roelofs via mahadev)

    MAPREDUCE-2405. Implement uber-AppMaster (in-cluster LocalJobRunner for MRv2).
    (Greg Roelofs and Sharad Agarwal via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix YarnRemoteException to give more
    details. (Siddharth Seth via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. WebApp for Job History (Krishna
    Ramachandran via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Install sanitized poms for downstream
    sanity (Luke Lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Add HistoryCleanerService to Job History
    server. (Krishna Ramachandran via sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Implement 'bin/mapred job -list' and
    'bin/mapred job -list-active-trackers'. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Implement 'bin/mapred queue [-info
    [-showJobs]] [-list] and enhanced 'bin/mapred job -list' to show queue and
    ApplicationMaster information. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed computation of user-limits at
    runtime. (acmurthy) 

    MAPREDUCE-279. Fix in MR-279 branch. Added functionality to refresh queues at
    runtime via the 'bin/yarn rmadmin' command. (acmurthy) 

    MAPREDUCE-279. Fix in MR-279 branch. Added functionality to stop/start queues.
    (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Introducing web-UI for NodeManager and
    linking it from RM UI. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fix race condition in TestJobHistoryEvents
    and TestJobHistoryParsing. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Add Containers' logs' view to NM UI and
    link it from AM UI. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Add ACLs for queues and command-line
    utilities for viewing them. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Recovery of MR Application Master from
    failures. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Added support High-RAM applications in
    CapacityScheduler. (acmurthy) 

    MAPREDUCE-279. Fix in MR-279 branch. Completing the ZooKeeper Store for
    ResourceManager state. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Reorient container localization to be
    per-container rather than per-application. (cdouglas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix file creation in
    JobHistoryEventHandler. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Disable ContainerMonitoring for non-linux
    systems. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fix container launch w/ inconsistent
    credential file naming. (cdouglas)

    MAPREDUCE-2434. Metrics for ResourceManager. (Luke Lu via acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. RM Restart Phase 2 - Completed the recovery
    of components in the RM (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix to send finish application event only
    when the application is finished (mahadev)

    MAPREDUCE-2462. Write job conf along with JobHistory, other minor improvements.
    (Siddharth Seth via sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Implement 'delay scheduling' for better
    locality in CapacityScheduler and improved high-ram applications. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Implement Job Acls in MR Application
    Master. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Moving userlogs out of container work-dir
    into a separate directory structure. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Completing RM Restart. Completed Phase 3 of
    making sure events are logged and restored (mahadev)

    MAPREDUCE-2468. Add metrics for NM Shuffle. (Luke Lu via cdouglas)

    MAPREDUCE-279. Fix in MR-279 branch. Adding user log handling for YARN. Making
    NM put the user-logs on DFS and providing log-dump tools. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing three tight-loops in RM that are
    causing high cpu-usage. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Replacing FileContext usage with FileSystem
    to work around security authentication issues with FileContext against a secure
    DFS. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Client reconnect to restarted AM. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Fix refreshProxy in ClientServiceDelegate.
    (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Fix Null Pointer in TestUberAM. (sharad) 

    MAPREDUCE-2478. Improve history server. (Siddharth Seth via sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Improved TestJobHistoryEvents and
    TestJobHistoryParsing. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Fix NM to use multiple disks for local
    files and the userlogs. (vinodkv)

    MAPREDUCE-2480: MR App should not depend on hard coded version of shuffle (luke
    lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Propagate error back to client in case of a
    job submission failure (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix assembly to add mapreduce shell scripts
    to the assembly package. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix TestQueueMetrics. (Luke Lu via sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Removal of stale application-log dirs from
    NM local disks. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Add license header and minor cleanup in
    history server. (Siddharth Seth via sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Minor fix for install instructions.
    (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix a race in MR task that was causing MR
    containers to overwrite each other's job.xml. Also fix leaking attempt-dirs in
    app-local-dir. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Adding valid state to ASM on a finish when
    its already completed and also disble UberAM. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed CS user limits. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed reservation's bad interaction with
    delay scheduling in CS. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Support mapreduce old (0.20) APIs. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Support fail-fast for MR jobs. (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for clearing container requests on an
    AM failure and add tostring methods to taskids and taskattemptids for better
    grep support. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Speed up communication between MR AM and RM
    by relying on a new config rather than AM_EXPIRY_INTERVAL which is too large.
    (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix calculation of maximum capacity to use
    parent's absolute-capacity rather than the leaf queue's absolute-capacity.
    (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing a bug in JobIDPbImpl that's causing
    AM to crash randomly. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fix calculation of maximum capacity in
    ParentQueue to use its parent's absolute-capacity rather than its own
    absolute-capacity. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Launching bin/yarn and bin/mapred only
    *once* in AM for constructing classpaths to avoid multiple forks and huge vmem
    usage by AM. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fix CapacityScheduler to release unused
    reservations on application completion. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix CapacityScheduler (LeafQueue) to not
    allocate DATA_LOCAL containers when they are not required on the rack.
    (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Makes uber-task disabled by default (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Make logging and memory for AM configurable
    for the user via command line (mahadev) 

    MAPREDUCE-279. Fix in MR-279 branch. Fixing a bug in previous patch (r1103657).
    Now bin/yarn truly shouldn't be launched multiple times in a single AM.
    (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing a bug to do with setting the staging
    dir. (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed Composite Service to shutdown
    services if an error occurs on starting any one of those (mahadev & chris)

    MAPREDUCE-279. Fix in MR-279 branch. Fix the tests to use jvm fork mode to avoid
    errors in shutting down services (sidharth seth)

    MAPREDUCE-2500. PB factories are not thread safe (Siddharth Seth via mahadev) 

    MAPREDUCE-2504. race in JobHistoryEventHandler stop (Siddharth Seth via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix job hang if the AM launch fails.
    (mahadev) 

    MAPREDUCE-2509. Fix NPE in UI for pending attempts. (Luke Lu via mahadev) 

    MAPREDUCE-279. Fix in MR-279 branch. Add junit jar to lib in assembly (mahadev
    and luke)

    MAPREDUCE-279. Fix in MR-279 branch. Distributed cache bug fix to pass Terasort.
    (vinodkv)
     
    MAPREDUCE-279. Fix in MR-279 branch. Fix null pointer exception in kill task
    attempt (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Refactored RMContainerAllocator to release
    unused containers. (sharad) 

    MAPREDUCE-279. Fix in MR-279 branch. Changed Scheduler to return available limit
    to AM in the allocate api. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix nodemanager expiry to not throw OOM.
    (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Use DefaultContainerExecutor for
    integration tests. (cdouglas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix NPE in test case (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for regression on the scheduling of
    reduces before maps are done (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix distributed-cache related bugs.
    (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Ensure unused containers released by AM are
    correctly counted for queue-capacity. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix TestRuntimeEstimators (Siddharth Seth
    via ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix queue refresh to correctly record newly
    added queues in CapacityScheduler. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Added metrics for tracking reservations in
    CapacityScheduler. (Luke Lu via acmurthy)

    MAPREDUCE-2522. Security for JobHistory service. (Siddharth Seth via mahadev)

    MAPREDUCE-2534. Fix CI breaking hard coded version in jobclient pom. (Luke Lu
    via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Add public cache. (cdouglas)

    MAPREDUCE-279. Fix in MR-279 branch. Made number of RPC server threads
    configurable. (acmurthy) 

    MAPREDUCE-279. Fix in MR-279 branch. Added acl check for RMAdmin. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Adding job kill for any state that the job
    is in with access control. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Add debug statements for AM not launching
    (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing race condition leader to hung jobs
    in scheduler negotiator (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Add debug config for delaying delete of
    local files. (cdouglas)

    MAPREDUCE-2527. Metrics for MRAppMaster (Luke lu via mahadev)

    MAPREDUCE-2532. Metrics for NodeManager (Luke Lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed an NPE during handling of unnecessary
    reservations in CS. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for public dist cache to work with non
    default hdfs (mahadev &ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Making streaming -file option work. Also
    minor fixes for successful compilation of contrib tests. (vinodkv)

    MAPREDUCE-2536. Backporting changes to MR-279.

    MAPREDUCE-279. Fix in MR-279 branch. Bugfix for using user staging directory for
    history files (Siddharth Seth via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. First fix for making basic speculative
    execution work (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fixes for TestFail/Kill (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Set correct version of avro-maven-plugin
    that is available in apache maven repositories. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing and reneabling
    TestContainerTokenSecretManager. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Cleaning up configuration constants in
    mapreduce modules. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing NPE on speculator in MRAppMaster and
    making job-history optional in tests to make test goal succeed. (vinodk and
    sharadag).

    MAPREDUCE-279. Fix in MR-279 branch. Fixed NPE in CS by checking Application
    state before scheduling and fixing synchronization in CS. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Making pipes work with YARN. Changed pipes
    to get log-locations from an environmental variable. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Ensure 'lost' NodeManagers are dealt
    appropriately, the containers are released correctly. (acmurthy) 

    MAPREDUCE-279. Fix in MR-279 branch. Adding some more logging for AM expiry logs
    (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Reduce ramp up and zero maps support.
    (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Allowing hdfs calls from streaming/pipes
    tasks. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Added ability to decommission nodes and
    completed RM administration tools to achieve parity with JobTracker. (acmurthy) 

    MAPREDUCE-2551. Added JobSummaryLog. (Siddharth Seth via acmurthy)

    MAPREDUCE-2552. Fixed NPE in CompletedJob in JobHistoryServer. (Siddharth Seth
    via acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix reduce slow start. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed TestFifoScheduler. (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix build issue for using yarn.version
    instead of hadoop-mapred.version (mahadev and giri)

    MAPREDUCE-279. Fix in MR-279 branch. Fixes in the handling of KILL events in the
    SUCCEEDED state for tasks in the application master (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for NPE in TestRMNMRPCResponseId.
    (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix a deadlock in the resourcemanager.
    (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. NodeStatus.getNodeHealthStatus().setBlah
    broken (Siddharth Seth)

    MAPREDUCE-279. Fix in MR-279 branch. Fix another NPE in TestRMNMRPCResponseId.
    (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for NPE in TestNMExpiry (siddharth
    seth)

    MAPREDUCE-279. Fix in MR-279 branch. Making each node aggregate all its
    user-logs to a separate hdfs file. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fix calculation of max-capacity for a
    queue, also fixed a bug in registration of NodeManagers. (acmurthy) 

    MAPREDUCE-279. Fix in MR-279 branch. More cleaning up constants, removing stale
    code, and making conspicuous the envs that apps depend on to be provided by
    YARN. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fix container size rounding in AM and
    headroom in RM. (acmurthy and sharad) 

    MAPREDUCE-279. Fix in MR-279 branch. Disable Job acls until fixed (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix to report job status if the application
    is KILLED/FAILED. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix a corner case in headroom computation -
    now reservations are taken into account and headroom is computed much later to
    account for allocations/reservations. (acmurthy) 

    MAPREDUCE-2537. The RM writes its log to
    yarn-mapred-resourcemanager-<RM_Host>.out (Robert Evans via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix logging for showing the state of job
    (FAILED/KILLED/SUCCEEDED) when it completes (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Re-enabled TestCapacityScheduler.
    (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Support for min and max container capacity.
    (acmurthy and sharad)

    MAPREDUCE-2531. Fixed jobcontrol to downgrade JobID. (Robert Evans via acmurthy) 

    MAPREDUCE-2539. Fixed NPE in getMapTaskReports in JobClient. (Robert Evans via
    acmurthy) 

    MAPREDUCE-279. Fix in MR-279 branch. Fixing the wrong config key used in
    JobHistory that prevented configuring move-thread interval. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed inconsistency in QueueACL enums.
    (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Fix various issues with Web UI's. (Luke Lu)

    MAPREDUCE-279. Fix in MR-279 branch. Fix class cast exception in Task abort for
    old mapreduce apis. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Add deletion of distributed cache
    resources. (cdouglas)

    MAPREDUCE-279. Fix in MR-279 branch. Disable aggregation of logs onto DFS till
    JobHistoryServer starts serving logs. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Cleanup redundant code in TaskAttemptImpl.
    (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Work around broken signaling in public
    cache. (cdouglas)

    MAPREDUCE-2566. YarnConfiguration should reloadConfiguration if instantiated
    with a non YarnConfiguration object. (Siddharth Seth)

    MAPREDUCE-279. Fix in MR-279 branch. Fully resolve paths when launching
    containers. (Siddharth Seth)

    MAPREDUCE-279. Fix in MR-279 branch. Re-enabling Uber-AM feature. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed deadlock during expiring NMs.
    (acmurthy)

    MAPREDUCE-279. Fix in MR-279 branch. Solving NPEs during
    ContainerManager#StopContainer. Also removing the unused
    ContainerManager#CleanupContainer api. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Remove retries in dist cache so that NM's
    do not shutdown (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix classpath construction for Task.
    (vinodkv via sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Sending Job diagnostics from AM to RM and
    redirect to history-url on job completion. (vinodkv and sharadag)

    MAPREDUCE-279. Fix in MR-279 branch. Added clover in pom dependency. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Intermittent TestMRApp failures on faster
    Linux desktop. (Luke lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Including source files in release
    distribution (Luke Lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Intermittent TestMRApp failures on faster
    Linux desktop (part 2) (Luke lu via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Disable Uber AM. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Added few job diagnostic messages. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Add ability to includes src files in
    assembly target for maven (Luke Lu via mahadev)

    MAPREDUCE-2582. Cleanup JobHistory event generation.(Siddharth Seth via sharad)  

    MAPREDUCE-279. Fix in MR-279 branch. Fix rounding off problem in reduce ramp up.
    (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Fix more rounding off problems in reduce
    ramp up. Also fix a bug preventing the application of the cap on reduce ramp-up.
    (Sharad Agarwal via vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fix to exclude images dir into the tar
    distribution (Luke Lu via gkesavan)

    MAPREDUCE-279. Fix in MR-279 branch. Changes a couple of usages of FileContext
    to FileSystem in YarnRunner to handle distributed cache path resolutions on
    non-default filesystems. (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Display failed/killed attempts of the task
    on MR AM UI separately. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Miscellaneous UI fixes + source code
    formatting for MR JobHistoryEventHandler. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing broken link to logs for container on
    NM web UI. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing the bug which was causing FAILED
    jobs to be displayed as COMPLETED on the RM UI. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Job level node blacklisting. (sharad)

    MAPREDUCE-279. Fix in MR-279 branch. Fix NPE in history event handling
    (Siddharth Seth via mahadev)

    MAPREDUCE-2569. Ensure root queue allocated 100% capacity. (Jonathan Eagles via
    cdouglas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix ClassCastException in JobHistoryServer
    for certain jobs. (Siddharth Seth via llu)

    MAPREDUCE-279. Fix in MR-279 branch. Changes for invoking rack resolution in the
    RM and in the AM (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix concurrent modification exception in
    the Capacity Scheduler (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix stopContainer for setsid challenged
    platforms. (llu)

    MAPREDUCE-2587. Generate yarn version for UI. (Thomas Graves via lluts page to
    the history server UI. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Bug fix to set correct state on containers
    so as to avoid duplicate containers from RM to AM. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Hack until MAPREDUCE-2365 is fixed to make
    PIG work with MRV2. (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Changes a couple of usages of FileContext
    to FileSystem in TaskAttemptImpl to handle distributed cache path resolutions on
    non-default filesystems. (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix NPE when requesting attempts for
    completed jobs. (Siddharth Seth via llu)

    MAPREDUCE-279. Fix in MR-279 branch. Improve logging for AM when requesting
    containers to show the right ask and release fields (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix race condition between multiple
    localizers on a single node. (cdouglas via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix RM app start/finish time and
    diagnostics. (llu)

    MAPREDUCE-279. Fix in MR-279 branch. Fix to schedule reduces irrespective of the
    headroom when all maps are done so as to avoid stall in reduce-scheduling when
    slow-start is disabled. (Sharad Agarwal via vinodkv).

    MAPREDUCE-279. Fix in MR-279 branch. Disabling locality-wait in
    CapacityScheduler for now to prevent uber-slow scheduling for apps with no
    data-locality constraints (sleep-job like). (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Fixing scheduling deadlock in AM because of
    incorrect headRoom values from RM. The bug happens when AM releases containers
    and RM decrements current memory usage twice for all those containers. (vinodkv)

    MAPREDUCE-2611. Fix counters, finish times etc. in job history. (Siddharth Seth
    via llu)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for ConcurrentModification exception
    while iterating through tokens in a UGI in ContainerLauncherImpl. (ddas)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for NPE in YarnChild that was causing
    lots of tasks to fail. (vinodkv)

    MAPREDUCE-2615. Make killJob go through AM and fix JobSummaryLog. (Siddharth
    Seth via llu)

    MAPREDUCE-279. Fix in MR-279 branch. Fix class cast exception in release
    reserved containers in capacity scheduler (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix diagnostics display for more than 100
    apps in RM. (llu)

    MAPREDUCE-279. Fix in MR-279 branch. Fix some invalid transitions in the RM.
    (vinodkv via ddas)

    MAPREDUCE-2618. Fix NPE in 0 map 0 reduce jobs. (Jeffrey Naisbitt via llu)

    MAPREDUCE-2625. Add version info to nodemanager info page. (Jonathan Eagles via
    llu)

    MAPREDUCE-279. Fix in MR-279 branch. (1) Faster retries from AM to HistoryServer
    (2) Correct diagnostics for containers. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Major ASM cleanup. Streamlining classes,
    interface and events. (vinodkv)

    MAPREDUCE-279. Fix in MR-279 branch. Reinstate resolve path fixes for viewfs.
    (Siddharth Seth via llu)

    MAPREDUCE-2633. Add a getCounter(Enum) method to the Counters record. (Josh
    Wills via sharad)

    MAPREDUCE-2645. Updates to MRv2 INSTALL and README documentation. (Josh Wills
    via vinodkv)

    MAPREDUCE-2628. Add compiled on date to NM and RM info/about page.

    MAPREDUCE-2400. Remove Cluster's dependency on JobTracker via a ServiceProvider
    for the actual implementation. (tomwhite via acmurthy) 

    MAPREDUCE-2663. Refactoring StateMachineFactory inner classes. (ahmed radwan via
    mahadev)

    MAPREDUCE-2678. minimum-user-limit-percent no longer honored. (naisbitt via
    mahadev)

    MAPREDUCE-2630. refreshQueues leads to NPEs when used w/FifoScheduler. (Josh
    Wills via mahadev)

    MAPREDUCE-2644. NodeManager fails to create containers when NM_LOG_DIR is not
    explicitly set in the Configuration. (Josh Wills via vinodkv)

    MAPREDUCE-2661. Fix TaskImpl to not access MapTaskImpl. (Ahmed Radwan via
    sharad) 

    HADOOP-6929. Backport changes to MR-279 (mahadev and owen)

    HADOOP-6929. Making Security Info abstract and not an interface (mahadev)

    MAPREDUCE-2667. mapred job -kill leaves application in RUNNING state (thomas
    graves via mahadev)

    MAPREDUCE-2664. Implement JobCounters for Mtions as asynchronous. (vinodkv,
    sharad and acmurthy)

    MAPREDUCE-2773. server.api.records.NodeHealthStatus renamed but not updated in
    client NodeHealthStatus.java (Thomas Graves via mahadev)

    MAPREDUCE-2772. Fix MR-279 build after common mavenization. (Robert Joseph Evans
    via llu)

    MAPREDUCE-2772. Fix MR-279 build after common mavenization, part 2. (Thomas
    Graves via llu)

    MAPREDUCE-279. Fix in MR-279 branch. Harmonize slf4j versions. (llu)

    MAPREDUCE-279. Fix in MR-279 branch. Fix NPE in FifoScheduler. (mahadev)

    MAPREDUCE-2776. Fix some of the yarn findbug warnings. (Siddharth Seth via
    mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix findbugs warnings in mr-client modules,
    part 1 (mahadev) 

    MAPREDUCE-279. Fix in MR-279 branch. Fix findbugs warnings in mr-client modules
    part 2 (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix findbugs warnings in mr-client modules
    part 3 (mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix the poms to enable 0.23 snapshots for
    hdfs/common from apache nightly builds (gkesavan)

    MAPREDUCE-279. Fix in MR-279 branch. Fix ivy conf to work with the hadoop common
    trunk maven build changes. (Giridharan Kesavan)

    MAPREDUCE-279. Fix in MR-279 branch. Patch for findbugs warnings in Resource
    Manager (Siddharth Seth via mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fix for running ant targets to use the
    right set of common/test jars (gkesavan via mahadev)

    MAPREDUCE-2782. Unit tests for CapacityScheduler. (acmurthy) 

    MAPREDUCE-2706. Log job submission failures. (Jeffrey Naisbitt via acmurthy) 

    MAPREDUCE-2781. mr279 RM application finishtime not set (Thomas Graves via
    mahadev)

    MAPREDUCE-279. Fix in MR-279 branch. Fixed CS locality wait factor. (acmurthy)

    MAPREDUCE-2808. pull MAPREDUCE-2797 into mr279 branch (Thomas Graves via
    mahadev)

    MAPREDUCE-2639. Bug fixes in speculate.DataStatistics. (Josh Wills via acmurthy)

    MAPREDUCE-2839. Fixed TokenCache to get delegation tokens using both new and old
    apis. (Siddharth Seth via acmurthy)

    MAPREDUCE-2727. Fix divide-by-zero error in SleepJob for sleepCount equals 0.
    (Jeffrey Naisbitt via acmurthy)

    MAPREDUCE-2839. Fixed TokenCache to get delegation tokens using both new
    and old apis. (Siddharth Seth via acmurthy)

    MAPREDUCE-2727. Fix divide-by-zero error in SleepJob for sleepCount equals
    0. (Jeffrey Naisbitt via acmurthy)
 
    MAPREDUCE-2860. Fix log4j logging in the maven test cases. (mahadev)

    MAPREDUCE-2867. Remove Unused TestApplicaitonCleanup in resourcemanager/applicationsmanager.
    (mahadev)

    MAPREDUCE-2868. ant build broken in hadoop-mapreduce dir (mahadev, giri and arun via mahadev)

    MAPREDUCE-2649. Handling of finished applications in RM. (Thomas Graves
    via acmurthy) 

    MAPREDUCE-2838. Fix MapReduce builds to use new hadoop-common test jars.
    (gkesavan via acmurthy) 
   
    MAPREDUCE-2859. Fix eclipse plugin contrib module compilation (gkesavan) 

    MAPREDUCE-2846. Fix missing synchronization in the task log management.
    (omalley)

    MAPREDUCE-2807. Fix AM restart and client redirection. (sharad)

    MAPREDUCE-2877. Add missing Apache license header in some files in MR 
    and also add the rat plugin to the poms. (mahadev)

    MAPREDUCE-2796. Set start times for MR applications for clients to see.
    (Devaraj K via acmurthy) 

    MAPREDUCE-2879. Fix version for MR-279 to 0.23.0. (acmurthy) 
   
    MAPREDUCE-2881. Fix to include log4j 1.2.16 depenency (gkesavan)

    MAPREDUCE-2885. Fix mapred-config.sh to look for hadoop-config.sh in
    HADOOP_COMMON_HOME/libexec. (acmurthy) 

    MAPREDUCE-2893. Remove duplicate entry of YarnClientProtocolProvider in
    ClientProtocolProvider services file. (Liang-Chi Hsieh via acmurthy) 

    MAPREDUCE-2891. Javadoc for AMRMProtocol and related records. (acmurthy)

    MAPREDUCE-2898. Javadoc for ContainerManager protocol and related records. 
    (acmurthy)

    MAPREDUCE-2904. Fixed bin/yarn to correctly include HDFS jars and
    clean up of stale refs to pre-mavenized Hadoop Common and HDFS. 
    (Sharad Agarwal and Arun C. Murthy via acmurthy)

    MAPREDUCE-2737. Update the progress of jobs on client side. (Siddharth Seth
    and Mahadev Konar via mahadev)

    MAPREDUCE-2886. Fix Javadoc warnings in MapReduce. (mahadev)

    MAPREDUCE-2897. Javadoc for ClientRMProtocol protocol and related records. 
    (acmurthy)

    MAPREDUCE-2916. Ivy build for MRv1 fails with bad organization for 
    common daemon. (mahadev)

    MAPREDUCE-2917. Fixed corner case in container reservation which led to
    starvation and hung jobs. (acmurthy) 

    MAPREDUCE-2756. Better error handling in JobControl for failed jobs.
    (Robert Evans via acmurthy) 

    MAPREDUCE-2716. MRReliabilityTest job fails because of missing
    job-file. (Jeffrey Naisbitt via vinodkv)

    MAPREDUCE-2882. TestLineRecordReader depends on ant jars. (todd)

    MAPREDUCE-2687. Fix NodeManager to use the right version of
    LocalDirAllocator.getLocalPathToWrite. (mahadev & acmurthy) 

    MAPREDUCE-2800. Set final progress for tasks to ensure all task information
    is correctly logged to JobHistory. (Siddharth Seth via acmurthy)

    MAPREDUCE-2938. Log application submission failure in CapacityScheduler.
    (acmurthy) 

    MAPREDUCE-2948. Hadoop streaming test failure, post MR-2767 (mahadev)

    MAPREDUCE-2908. Fix all findbugs warnings. (vinodkv via acmurthy) 

    MAPREDUCE-2947. Fixed race condition in AuxiliaryServices. (vinodkv via
    acmurthy) 

    MAPREDUCE-2844. Fixed display of nodes in UI. (Ravi Teja Ch N V via
    acmurthy) 

    MAPREDUCE-2677. Fixed 404 for some links from HistoryServer. (Robert Evans
    via acmurthy) 

    MAPREDUCE-2937. Ensure reason for application failure is displayed to the
    user. (mahadev via acmurthy) 

    MAPREDUCE-2953. Fix a race condition on submission which caused client to 
    incorrectly assume application was gone by making submission synchronous
    for RMAppManager. (Thomas Graves via acmurthy) 

    MAPREDUCE-2963. Fix hang in TestMRJobs. (Siddharth Seth via acmurthy) 

    MAPREDUCE-2954. Fixed a deadlock in NM caused due to wrong synchronization
    in protocol buffer records. (Siddharth Seth via vinodkv)

    MAPREDUCE-2975. Fixed YARNRunner to use YarnConfiguration rather than
    Configuration. (mahadev via acmurthy) 
 
    MAPREDUCE-2971. ant build mapreduce fails protected access jc.displayJobList
    (jobs) (Thomas Graves via mahadev)

    MAPREDUCE-2691. Finishing up the cleanup of distributed cache file resources
    and related tests. (Siddharth Seth via vinodkv)

    MAPREDUCE-2749. Ensure NM registers with RM after starting all its services
    correctly. (Thomas Graves via acmurthy)

    MAPREDUCE-2979. Removed the needless ClientProtocolProvider configuration
    from the hadoop-mapreduce-client-core module. (Siddharth Seth via vinodkv)

    MAPREDUCE-2985. Fixed findbugs warnings in ResourceLocalizationService.
    (Thomas Graves via acmurthy)

    MAPREDUCE-2874. Fix formatting of ApplicationId in web-ui. (Eric Payne via
    acmurthy)

    MAPREDUCE-2995. Better handling of expired containers in MapReduce
    ApplicationMaster. (vinodkv via acmurthy) 

    MAPREDUCE-2995. Fixed race condition in ContainerLauncher. (vinodkv via 
    acmurthy) 

    MAPREDUCE-2949. Fixed NodeManager to shut-down correctly if a service
    startup fails. (Ravi Teja via vinodkv)

    MAPREDUCE-3005. Fix both FifoScheduler and CapacityScheduler to correctly
    enforce locality constraints. (acmurthy) 

    MAPREDUCE-3007. Fixed Yarn Mapreduce client to be able to connect to 
    JobHistoryServer in secure mode. (vinodkv)

    MAPREDUCE-2987. Fixed display of logged user on RM Web-UI. (Thomas Graves
    via acmurthy)

    MAPREDUCE-3006. Fixed MapReduce AM to exit only after properly writing out
    history file. (vinodkv)

    MAPREDUCE-2925. Fixed Yarn+MR client code to behave saner with completed
    jobs. (Devaraj K via vinodkv)

    MAPREDUCE-3030. Fixed a bug in NodeId.equals() that was causing RM to
    reject all NMs. (Devaraj K via vinodkv)

    MAPREDUCE-3042. Fixed default ResourceTracker address. (Chris Riccomini
    via acmurthy) 

    MAPREDUCE-3038. job history server not starting because conf() missing
    HsController (Jeffrey Naisbitt via mahadev)

    MAPREDUCE-3004. Fix ReduceTask to not assume 'local' mode in YARN. (Hitesh
    Shah via acmurthy)

    MAPREDUCE-3017. The Web UI shows FINISHED for killed/successful/failed jobs.
    (mahadev)

    MAPREDUCE-3040. Fixed extra copy of Configuration in
    YarnClientProtocolProvider and ensured MiniMRYarnCluster sets JobHistory
    configuration for tests. (acmurthy) 

    MAPREDUCE-3018. Fixed -file option for streaming. (mahadev via acmurthy) 

    MAPREDUCE-3036. Fixed metrics for reserved resources in CS. (Robert Evans
    via acmurthy)

    MAPREDUCE-2998. Fixed a bug in TaskAttemptImpl which caused it to fork
    bin/mapred too many times. (vinodkv via acmurthy)

    MAPREDUCE-3023. Fixed clients to display queue state correctly. (Ravi
    Prakash via acmurthy) 

    MAPREDUCE-2970. Fixed NPEs in corner cases with different configurations
    for mapreduce.framework.name. (Venu Gopala Rao via vinodkv)

    MAPREDUCE-3062. Fixed default RMAdmin address. (Chris Riccomini
    via acmurthy) 

    MAPREDUCE-3066. Fixed default ResourceTracker address for the NodeManager. 
    (Chris Riccomini via acmurthy) 

    MAPREDUCE-3044. Pipes jobs stuck without making progress. (mahadev)

    MAPREDUCE-2754. Fixed MR AM stdout, stderr and syslog to redirect to
    correct log-files. (Ravi Teja Ch N V via vinodkv)

    MAPREDUCE-3073. Fixed build issues in MR1. (mahadev via acmurthy)

    MAPREDUCE-2691. Increase threadpool size for launching containers in
    MapReduce ApplicationMaster. (vinodkv via acmurthy)


    MAPREDUCE-2990. Fixed display of NodeHealthStatus. (Subroto Sanyal via
    acmurthy) 

    MAPREDUCE-3053. Better diagnostic message for unknown methods in ProtoBuf
    RPCs. (vinodkv via acmurthy)

    MAPREDUCE-2952. Fixed ResourceManager/MR-client to consume diagnostics
    for AM failures in a couple of corner cases. (Arun C Murthy via vinodkv)

    MAPREDUCE-3064. 27 unit test failures with Invalid 
    "mapreduce.jobtracker.address" configuration value for 
    JobTracker: "local" (Venu Gopala Rao via mahadev)

    MAPREDUCE-3090. Fix MR AM to use ApplicationAttemptId rather than
    (ApplicationId, startCount) consistently. (acmurthy)  

    MAPREDUCE-2646. Fixed AMRMProtocol to return containers based on
    priority. (Sharad Agarwal and Arun C Murthy via vinodkv)

    MAPREDUCE-3031. Proper handling of killed containers to prevent stuck
    containers/AMs on an external kill signal. (Siddharth Seth via vinodkv)

    MAPREDUCE-2984. Better error message for displaying completed containers.
    (Devaraj K via acmurthy)

    MAPREDUCE-3071. app master configuration web UI link under the Job menu 
    opens up application menu. (thomas graves  via mahadev)

    MAPREDUCE-3067. Ensure exit-code is set correctly for containers. (Hitesh
    Shah via acmurthy)

    MAPREDUCE-2999. Fix YARN webapp framework to properly filter servlet
    paths. (Thomas Graves via vinodkv)

    MAPREDUCE-3095. fairscheduler ivy including wrong version for hdfs.
    (John George via mahadev)

    MAPREDUCE-3054. Unable to kill submitted jobs. (mahadev)

    MAPREDUCE-3021. Change base urls for RM web-ui. (Thomas Graves via
    acmurthy) 

    MAPREDUCE-3041. Fixed ClientRMProtocol to provide min/max resource
    capabilities along-with new ApplicationId for application submission.
    (Hitesh Shah via acmurthy)

    MAPREDUCE-2843. Fixed the node-table to be completely displayed and making
    node entries on RM UI to be sortable. (Abhijit Suresh Shingate via vinodkv)

    MAPREDUCE-3110. Fixed TestRPC failure. (vinodkv)

    MAPREDUCE-3078. Ensure MapReduce AM reports progress correctly for
    displaying on the RM Web-UI. (vinodkv via acmurthy)

    MAPREDUCE-3114. Fixed invalid ApplicationURL on RM WebUI. (Subroto Sanyal
    via vinodkv)

    MAPREDUCE-2791. Added missing info on 'job -status' output. (Devaraj K via
    acmurthy)

    MAPREDUCE-2996. Add uber-ness information to JobHistory. (Jonathan Eagles
    via acmurthy)

    MAPREDUCE-3050. Add ability to get resource usage information for
    applications and nodes. (Robert Evans via acmurthy) 

    MAPREDUCE-3113. Ensure bin/yarn and bin/yarn-daemon.sh identify the root
    of the install properly. (Xie Xianshan via acmurthy) 

    MAPREDUCE-3137. Fix broken merge of MAPREDUCE-2179. (Hitesh Shah via
    acmurthy) 

    MAPREDUCE-2792. Replace usage of node ip-addresses with hostnames.
    (vinodkv via acmurthy) 

    MAPREDUCE-3112. Fixed recursive sourcing of HADOOP_OPTS environment
    variable. (Eric Yang)

    MAPREDUCE-3056. Changed the default staging directory to not include
    user.name to prevent issues with non-secure mode. (Devaraj K via vinodkv)

    MAPREDUCE-2913. Fixed TestMRJobs.testFailingMapper to assert the correct
    TaskCompletionEventStatus. (Jonathan Eagles via vinodkv)

    MAPREDUCE-2794. [MR-279] Incorrect metrics value for AvailableGB per 
    queue per user. (John George via mahadev)

    MAPREDUCE-2783. Fixing RM web-UI to show no tracking-URL when AM
    crashes. (Eric Payne via vinodkv)

    MAPREDUCE-3141. Fix the broken MRAppMaster to work over YARN in security
    mode.(vinodkv)

    MAPREDUCE-2751. Modified NodeManager to stop leaving around local files
    after application finishes. (Siddharth Seth via vinodkv)

    MAPREDUCE-3033. Ensure Master interface pays attention to classic v/s yarn
    frameworks. (Hitesh Shah via acmurthy)

    MAPREDUCE-2802. Ensure JobHistory filenames have jobId. (Jonathan Eagles
    via acmurthy) 

    MAPREDUCE-2876. Use a different config for ContainerAllocationExpirer.
    (Anupam Seth via acmurthy) 

    MAPREDUCE-3153. Fix TestFileOutputCommitter which was broken by
    MAPREDUCE-2702. (mahadev via acmurthy) 

    MAPREDUCE-3123. Fix NM to quote symlink names to escape special
    characters. (Hitesh Shah via acmurthy) 

    MAPREDUCE-3154. Fix JobSubmitter to check for output specs before copying
    job submission files to fail fast. (Abhijit Suresh Shingate via acmurthy) 

    MAPREDUCE-3158. Fix test failures in MRv1 due to default framework being
    set to yarn. (Hitesh Shah via acmurthy)

    MAPREDUCE-3167. container-executor is not being packaged with the assembly
    target. (mahadev)

    MAPREDUCE-3020. Fixed TaskAttemptImpl to log the correct node-address for
    a finished Reduce task. (Chackaravarthy via vinodkv)

    MAPREDUCE-2668. Fixed AuxServices to send a signal on application-finish
    to all the services. (Thomas Graves via vinodkv)

    MAPREDUCE-3126. Fixed a corner case in CapacityScheduler where headroom
    wasn't updated on changes to cluster size. (acmurthy) 

    MAPREDUCE-3140. Fixed the invalid JobHistory URL for failed
    applications. (Subroto Sanyal via vinodkv)

    MAPREDUCE-3125. Modified TaskImpl to consider only non-failed, non-killed
    task-attempts for obtaining task's progress. (Hitesh Shah via vinodkv)

    MAPREDUCE-2666. Retrieve shuffle port number from JobHistory on MR AM
    restart. (Jonathan Eagles via acmurthy) 

    MAPREDUCE-2789. Complete schedulingInfo on CLI. (Eric Payne via acmurthy) 

    MAPREDUCE-3170. Fixed job output commit for deep hierarchies. (Hitesh Shah
    via acmurthy)

    MAPREDUCE-3124. Fixed location of native libs i.e. libhadoop.so for
    containers. (John George via acmurthy) 

    MAPREDUCE-3057. Job History Server goes of OutOfMemory with 1200 Jobs 
    and Heap Size set to 10 GB. (Eric Payne via mahadev)

    MAPREDUCE-2840. mr279 TestUberAM.testSleepJob test fails. (jonathan eagles
    via mahadev)

    MAPREDUCE-3190. Ensure bin/yarn fails early with a clear error message
    when HADOOP_COMMON_HOME or HADOOP_HDFS_HOME are not set. (todd & acmurthy 
    via acmurthy)

    MAPREDUCE-3189. Add link decoration back to MR2's CSS. (Todd Lipcon via
    mahadev)
    
    MAPREDUCE-3127. Changed default value of yarn.resourcemanager.acl.enable
    to true and added some more documentation. (acmurthy) 

    MAPREDUCE-3032. Fixed TaskAttemptImpl so that JobHistory can have error
    information about failed tasks. (Devaraj K via vinodkv)

    MAPREDUCE-3196. TestLinuxContainerExecutorWithMocks fails on Mac OSX.
    (Arun Murthy via mahadev)

    MAPREDUCE-3197. TestMRClientService failing on building clean checkout of 
    branch 0.23 (mahadev)

    MAPREDUCE-2762. Cleanup MR staging directory on completion. (mahadev via
    acmurthy) 

    MAPREDUCE-3165. Ensure logging options are set correctly for MR AM and
    tasks. (todd via acmurthy) 

    MAPREDUCE-3203. Fix some javac warnings in MRAppMaster. (mahadev)

    MAPREDUCE-3162. Separated application-init and container-init event types
    in NodeManager's Application state machine. (Todd Lipcon via vinodkv)

    MAPREDUCE-3176. Fixed ant mapreduce tests that are timing out because
    of wrong framework name. (Hitesh Shah via vinodkv)

    MAPREDUCE-3181. Fixed MapReduce runtime to load yarn-default.xml and
    yarn-site.xml. (acmurthy) 

    MAPREDUCE-2788. Normalize resource requests in FifoScheduler
    appropriately. (Ahmed Radwan via acmurthy) 

    MAPREDUCE-2693. Fix NPE in job-blacklisting. (Hitesh Shah via acmurthy) 

    MAPREDUCE-3208. Fix NPE task/container log appenders. (liangzhwa via
    acmurthy) 

    MAPREDUCE-3212. Fix usage/help message for bin/yarn. (Bhallamudi Venkata 
    Siva Kamesh via acmurthy) 

    MAPREDUCE-3179. Ensure failed tests exit with right error code. (Jonathan
    Eagles via acmurthy)

    MAPREDUCE-3188. Ensure correct shutdown in services. (todd via acmurthy) 

    MAPREDUCE-3226. Fix shutdown of fetcher threads. (vinodkv via acmurthy) 

    MAPREDUCE-3070. Fix NodeManager to use ephemeral ports by default.
    (Devaraj K via acmurthy) 

    MAPREDUCE-3242. Trunk compilation broken with bad interaction from 
    MAPREDUCE-3070 and MAPREDUCE-3239. (mahadev)

    MAPREDUCE-3058. Fixed MR YarnChild to report failure when task throws an
    error and thus prevent a hanging task and job. (vinodkv)

    MAPREDUCE-3087. Fixed the mapreduce classpath to correctly include the
    generated-classpath file needed for tests. (Ravi Prakash via vinodkv)

    MAPREDUCE-3233. Fixed a bug in MR Job so as to be able to restart the
    application on AM crash. (Mahadev Konar via vinodkv)

    MAPREDUCE-3028. Added job-end notification support. (Ravi Prakash via
    acmurthy) 

    MAPREDUCE-3249. Ensure shuffle-port is correctly used duringMR AM recovery. 
    (vinodkv via acmurthy) 

    MAPREDUCE-3252. Fix map tasks to not rewrite data an extra time when
    map output fits in spill buffer. (todd)

    MAPREDUCE-3159. Ensure DefaultContainerExecutor doesn't delete application
    directories during app-init. (todd via acmurthy)

    MAPREDUCE-2746. Yarn servers can't communicate with each other with 
    hadoop.security.authorization set to true (acmurthy via mahadev)

    MAPREDUCE-2821. Added missing fields (resourcePerMap & resourcePerReduce)
    to JobSummary logs. (mahadev via acmurthy)

    MAPREDUCE-3253. Fixed ContextFactory to clone JobContext correctly.
    (acmurthy) 

    MAPREDUCE-3263. Fixed the MAPREDUCE-3028 commit which broke MR1. (Hitesh
    Shah via acmurthy) 

    MAPREDUCE-3269. Fixed log4j properties to correctly set logging options
    for JobHistoryServer vis-a-vis JobSummary logs. (mahadev via acmurthy) 

    MAPREDUCE-3250. When AM restarts, client keeps reconnecting to the new AM 
    and prints a lots of logs. (vinodkv via mahadev)

    MAPREDUCE-3254. Fixed streaming to set the job.jar by using the right
    JobConf ctor. (acmurthy) 

    MAPREDUCE-3264. mapreduce.job.user.name needs to be set automatically.
    (acmurthy via mahadev)

    MAPREDUCE-3175. Add authorization to admin web-pages such as /stacks, /jmx
    etc. (Jonathan Eagles via acmurthy)

    MAPREDUCE-3257. Added authorization checks for the protocol between
    ResourceManager and ApplicationMaster. (vinodkv via acmurthy) 

    MAPREDUCE-3259. Added java.library.path of NodeManager to
    ContainerLocalizer in LinuxContainerExecutor. (Kihwal Lee via acmurthy) 

    MAPREDUCE-3279. Fixed TestJobHistoryParsing which assumed user name to be
    mapred all the time. (Siddharth Seth via acmurthy)

    MAPREDUCE-3240. Fixed NodeManager to be able to forcefully cleanup its
    containers (process-trees) irrespective of whether the container succeeded,
    or killed. Contributed by Hitesh Shah.

    MAPREDUCE-3281. Fixed a bug in TestLinuxContainerExecutorWithMocks. (vinodkv)

    MAPREDUCE-3228. Fixed MR AM to timeout RPCs to bad NodeManagers. (vinodkv
    via acmurthy)

    MAPREDUCE-3284. Moved JobQueueClient to hadoop-mapreduce-client-core.
    (acmurthy) 

    MAPREDUCE-3282. bin/mapred job -list throws exception. (acmurthy via 
    mahadev)

    MAPREDUCE-3186. User jobs are getting hanged if the Resource manager
    process goes down and comes up while job is getting executed. 
    (Eric Payne via mahadev)

    MAPREDUCE-3285. Tests on branch-0.23 failing (Siddharth Seth via mahadev)

    MAPREDUCE-3258. Fixed AM & JobHistory web-ui to display counters properly.
    (Siddharth Seth via acmurthy)

    MAPREDUCE-3290. Fixed a NPE in ClientRMService. (acmurthy) 

    MAPREDUCE-3185. RM Web UI does not sort the columns in some cases.
    (Jonathan Eagles via mahadev)

    MAPREDUCE-3292. In secure mode job submission fails with Provider 
    org.apache.hadoop.mapreduce.security.token.JobTokenIndentifier$Renewer 
    not found. (mahadev)

    MAPREDUCE-3296. Fixed the remaining nine FindBugs warnings. (vinodkv)

    MAPREDUCE-2775. Fixed ResourceManager and NodeManager to force a
    decommissioned node to shutdown. (Devaraj K via vinodkv)

    MAPREDUCE-3304. Fixed intermittent test failure due to a race in
    TestRMContainerAllocator#testBlackListedNodes. (Ravi Prakash via acmurthy) 

    MAPREDUCE-3306. Fixed a bug in NodeManager ApplicationImpl that was causing
    NodeManager to crash. (vinodkv)

    MAPREDUCE-3295. TestAMAuthorization failing on branch 0.23. (vinodkv via mahadev)

    MAPREDUCE-3183. hadoop-assemblies/src/main/resources/assemblies/hadoop-mapreduce-dist.xml
    missing license header. (Hitesh Shah via tucu).

    MAPREDUCE-3003. Publish MR JARs to Maven snapshot repository. (tucu)

    MAPREDUCE-3199. Fixed pom files to include correct log4j configuration for
    tests. (vinodkv)

    MAPREDUCE-3204. mvn site:site fails on MapReduce. (tucu)

    MAPREDUCE-3248. Fixed log4j properties. (vinodkv via acmurthy)

    MAPREDUCE-3256. Added authorization checks for the protocol between
    NodeManager and ApplicationMaster. (vinodkv via acmurthy) 

    MAPREDUCE-3274. Fixed a race condition in MRAppMaster that was causing a
    task-scheduling deadlock. (Robert Joseph Evans via vinodkv)

    MAPREDUCE-3171 merge from trunk reverted changes from MAPREDUCE-2747 MAPREDUCE-3240.

    MAPREDUCE-3313. Fixed initialization of ClusterMetrics which was failing
    TestResourceTrackerService sometimes. (Hitesh Shah via vinodkv)

    MAPREDUCE-2766. Fixed NM to set secure permissions for files and directories
    in distributed-cache. (Hitesh Shah via vinodkv)

    MAPREDUCE-2696. Fixed NodeManager to cleanup logs in a thread when logs'
    aggregation is not enabled. (Siddharth Seth via vinodkv)

    MAPREDUCE-3262. Fixed Container's state-machine in NodeManager to handle
    a couple of events in failure states correctly. (Hitesh Shah and Siddharth
    Seth via vinodkv)

    MAPREDUCE-3035. Fixed MR JobHistory to ensure rack information is present.
    (chakravarthy via acmurthy)

    MAPREDUCE-3321. Disabled a few MR tests for 0.23. (Hitesh Shah via
    acmurthy) 

    MAPREDUCE-3220. Fixed TestCombineOutputCollector. (Devaraj K via acmurthy) 

    MAPREDUCE-3103. Implement Job ACLs for MRAppMaster. 
    (mahadev)
    
    MAPREDUCE-3241. [Rumen] Fix Rumen to ignore the AMStartedEvent. (amarrk)

    MAPREDUCE-3166. [Rumen] Make Rumen use job history api instead of relying
    on current history file name format. (Ravi Gummadi via amarrk)

    MAPREDUCE-3157. [Rumen] Fix TraceBuilder to handle 0.20 history file
                    names also. (Ravi Gummadi via amarrk)

    MAPREDUCE-3081. Fix vaidya startup script. (gkesavan via suhas).

    MAPREDUCE-2764. Fix renewal of dfs delegation tokens. (Owen via jitendra)

    MAPREDUCE-3192. Fix Javadoc warning in JobClient.java and Cluster.java.
    (jitendra)

    MAPREDUCE-3237. Move LocalJobRunner to hadoop-mapreduce-client-core.
    (tomwhite via acmurthy) 

    MAPREDUCE-3316. Rebooted link is not working properly. 
    (Bhallamudi Venkata Siva Kamesh via mahadev)

    MAPREDUCE-3317. Rumen TraceBuilder is emiting null as hostname.
    (Ravi Gummadi via mahadev)

    MAPREDUCE-3332. contrib/raid compile breaks due to changes in hdfs/protocol/datatransfer/
    Sender#writeBlock related to checksum handling (Hitesh Shah via mahadev)

    MAPREDUCE-3337. Added missing license headers. (acmurthy) 
    
Release 0.22.1 - Unreleased

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS

  OPTIMIZATIONS

  BUG FIXES

Release 0.22.0 - 2011-11-29

  INCOMPATIBLE CHANGES

    MAPREDUCE-1866. Removes deprecated class
    org.apache.hadoop.streaming.UTF8ByteArrayUtils. (amareshwari)

    MAPREDUCE-1664. Changes the behaviour of the combination of job-acls
    when they function together with queue-acls. (Ravi Gummadi via vinodkv)

    MAPREDUCE-2994. Fixed a bug in ApplicationID parsing that affects RM
    UI. (Devaraj K via vinodkv)

    MAPREDUCE-1788. o.a.h.mapreduce.Job shouldn't make a copy of the JobConf.
    (Arun Murthy via mahadev)

  NEW FEATURES

    MAPREDUCE-1804. Stress-test tool for HDFS introduced in HDFS-708.
    (Joshua Harlow via shv)

    MAPREDUCE-220. Collect cpu and memory statistics per task. (Scott Chen via
    acmurthy)

    MAPREDUCE-1970.  Reed-Solomon code implementation for HDFS RAID.
    (Scott Chen via dhruba)

    MAPREDUCE-2169. Integrated Reed-Solomon code with RaidNode. (Ramkumar
    Vadali via schen)

    MAPREDUCE-2936. Contrib Raid compilation broken after HDFS-1620. (vinodkv)

  IMPROVEMENTS

    MAPREDUCE-2141. Add an "extra data" field to Task for use by Mesos. (matei)

    MAPREDUCE-2140. Regenerate fair scheduler design doc PDF. (matei)

    MAPREDUCE-1546. Redirect all job pages to corresponding history page
    if job is not in JT memory. (Scott Chen via sharad)

    MAPREDUCE-1092. Enable assertions for unit tests. (Eli Collins via
    cdouglas)

    MAPREDUCE-1680. Add a metric recording JobTracker heartbeats processed.
    (Dick King via cdouglas)

    MAPREDUCE-1761. FairScheduler allows separate configuration of node
    and rack locality wait time (Scott Chen via dhruba)

    MAPREDUCE-1539. authorization checks for inter-server protocol
    (based on HADOOP-6600) (Boris Shkolnik via shv)

    MAPREDUCE-1798. Names the configuration keys for the Kerberos
    principals better. (Boris Shkolnik via ddas)

    MAPREDUCE-1773. streaming doesn't support jobclient.output.filter.
    (Amareshwari Sriramadasu via vinodkv)

    MAPREDUCE-1785. Add streaming config option for not emitting the key.
    (Eli Collins via sharad)

    MAPREDUCE-572. If #link is missing from uri format of -cacheArchive
    then streaming does not throw error. (Amareshwari Sriramadasu via
    vinodkv)

    MAPREDUCE-1545. Add timestamps for first task type launched in job summary.
    (Luke Lu via cdouglas)

    MAPREDUCE-1543. Add an audit log for authentication events. (Amar Kamat and
    Luke Lu via cdouglas)

    MAPREDUCE-1762. Add ability to set values of task counters. (Scott Chen via
    cdouglas)

    MAPREDUCE-1533. Reduce overhead of logging and string manipulation during
    heartbeat processing. (Amar Kamat and Dick King via cdouglas)

    MAPREDUCE-1516. JobTracker issues delegation tokens only if the user's
    authentication is Kerberos. (Jitendra Pandey via ddas)

    MAPREDUCE-647. Update distcp forrest documentation to reflect the changes
    of HADOOP-5472, MAPREDUCE-642 and HADOOP-5620.  (Rodrigo Schmidt via
    szetszwo)

    MAPREDUCE-1851. Documents configuration parameters in streaming.
    (amareshwari)
    
    MAPREDUCE-1868. Add a read and connection timeout to JobClient while
    pulling tasklogs. (Krishna Ramachandran via acmurthy)

    MAPREDUCE-1778. Ensure failure to setup CompletedJobStatusStore is not
    silently ignored by the JobTracker. (Krishna Ramachandran via acmurthy)

    MAPREDUCE-1850. Includes job submit host information (name and ip) in
    jobconf and jobdetails display (Krishna Ramachandran via amareshwari)

    MAPREDUCE-1893. Slive with multiple reducers. (shv)

    MAPREDUCE-1248. Fixes redudant memory copying in StreamKeyValUtil.
    (Ruibang He via amareshwari)

    MAPREDUCE-1840. Enhancements to Gridmix benchmark simulating user
    diversity, queue replay, and task duration for JobTracker load testing.
    Also includes compatibility with security enhancements, and scalability
    improvements. (Amar Kamat, Rahul Singh, Hong Tang, and cdouglas)

    MAPREDUCE-1848. Put number of speculative, data local, rack local 
    tasks in JobTracker metrics. (Scott Chen via dhruba)

    MAPREDUCE-1935. Makes the Distcp to work in a secure environment.
    (Boris Shkolnik via ddas)

    MAPREDUCE-1945. The MapReduce component for HADOOP-6632.
    (Kan Zhang & Jitendra Pandey via ddas)

    MAPREDUCE-1936. Modify Gridmix3 to support more tunable parameters for
    stress submission and sleep jobs. (Hong Tang via cdouglas)

    MAPREDUCE-1733. Makes pipes applications secure. (Jitendra Pandey via ddas)

    MAPREDUCE-1566. Adds a configuration attribute using which job clients can
    specify a credentials file. The tokens from there will be passed to the job.
    (Jitendra Pandey and Owen O'Malley via ddas)

    MAPREDUCE-1624. Documents the job credentials and associated details to do 
    with delegation tokens (on the client side). 
    (Jitendra Pandey and Devaraj Das via ddas)

    MAPREDUCE-1834. TestSimulatorDeterministicReplay timesout on trunk.
    (Hong Tang via mahadev)

    MAPREDUCE-1993. Fixes test failure
    TestTrackerDistributedCacheManagerWithLinuxTaskController. (Devaraj Das
    via amareshwari)

    MAPREDUCE-1523. Making Mumak work with Capacity-Scheduler (Anirban Das
    via mahadev)

    MAPREDUCE-1920. Enables completed jobstatus store by default. (Tom White
    via amareshwari)

    MAPREDUCE-1881. Improve TaskTrackerInstrumentation to enable collection of
    advanced metrics. (Matei Zaharia via acmurthy)

    MAPREDUCE-1548. Hadoop archives preserve times and other properties from 
    original files. (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1517. Supports streaming job to run in the background. (Bochun Bai
    via amareshwari)

    MAPREDUCE-1819. RaidNode is now smarter in submitting Raid jobs. (Ramkumar
    Vadali via schen)

    MAPREDUCE-2132. A command line option in RaidShell to fix blocks using raid

    MAPREDUCE-2147. Remove redundant lines in JobInProgress ctor.
    (Harsh J Chouraria via cutting)
   
    HADOOP-7007. Update the hudson-test-patch ant target to work with the
    latest test-patch.sh script (gkesavan)

    MAPREDUCE-1818. RaidNode can specify scheduling parameters. (Ramkumar
    Vadali via schen)

    MAPREDUCE-2051. Contribute a fair scheduler preemption system test.
    (Todd Lipcon via tomwhite)

    MAPREDUCE-1892. RaidNode can allow layered policies more efficiently.
    (Ramkumar Vadali via schen)

    MAPREDUCE-1592. Generate Eclipse's .classpath file from Ivy config. 
    (tomwhite via nigel)

    MAPREDUCE-2073. TestTrackerDistributedCacheManager should be up-front
    about requirements on build environment. (Todd Lipcon via tomwhite)

    MAPREDUCE-2093. Herriot JT and TT clients should vend statistics. (cos)

    MAPREDUCE-2167. Faster directory traversal for raid node. (Ramkumar Vadali
    via schen)

    MAPREDUCE-1931. Gridmix forrest documentation . (Ranjit Mathew via vinodkv).

    MAPREDUCE-2184. Port DistRaid.java to new mapreduce API. (Ramkumar Vadali
    via schen)

    MAPREDUCE-1878. Add MRUnit documentation. (Aaron Kimball via tomwhite)

    MAPREDUCE-2180. Add coverage of fair scheduler servlet to system test (todd)

    MAPREDUCE-2250. Fix logging in raid code. (Ramkumar Vadali via schen)

    MAPREDUCE-2260. Remove auto-generated native build files. (rvs via eli)

    MAPREDUCE-2314. configure files that are generated as part of the released
    tarball need to have executable bit set (rvs via cos)

    MAPREDUCE-1159.  Limit Job name in web UI to be 80 char long.  (Harsh J
    Chouraria via szetszwo)

    MAPREDUCE-2337. Remove dependence of public MapReduce API on classes in
    server package. (tomwhite)

    MAPREDUCE-2383. Improve documentation of DistributedCache methods (Harsh J
    Chouraria via todd)

    MAPREDUCE-2222. Ivy resolve force mode should be turned off by default.
    (Luke Lu via tomwhite)

    MAPREDUCE-2103. task-controller shouldn't require o-r permissions.
    (todd via eli)

    MAPREDUCE-2505. Explain how to use ACLs in the fair scheduler.
    (matei via eli)

    MAPREDUCE-3138. Add a utility to help applications bridge changes in 
    Context Objects APIs due to MAPREDUCE-954. (omalley via acmurthy)

  OPTIMIZATIONS

    MAPREDUCE-1354. Enhancements to JobTracker for better performance and
    scalability. (Arun C. Murthy & Richard King via acmurthy) 

    MAPREDUCE-1829. JobInProgress.findSpeculativeTask should use min() to
    find the candidate instead of sort(). (Scott Chen via vinodkv)

  BUG FIXES

    MAPREDUCE-1845. FairScheduler.tasksToPreempt() can return negative number.
    (Scott Chen via matei)

    MAPREDUCE-1707. TaskRunner can get NPE in getting ugi from TaskTracker.
    (Vinod Kumar Vavilapalli)
    
    MAPREDUCE-1532. Ensures that delegation tokens is obtained as the
    actual user when the proxy-user is used for submitting jobs. Also
    refactors the DelegationTokenToRenew class. (ddas)

    MAPREDUCE-1558. Fixes MRAdmin to look up the principal of the 
    JobTracker and use that in the RefreshUserToGroupsMapping protocol and
    RefreshAuthorizationPolicyProtocol. (Boris Shkolnik via ddas)

    MAPREDUCE-1662. Remove unused methods from TaskRunner. (Amareshwari
    Sriramadasu via cdouglas)

    MAPREDUCE-1617. Use IPv4 stack for unit tests. (Amar Kamat and Luke Lu via
    cdouglas)

    MAPREDUCE-1599. Fixes MRBench so that it reuses tokens across jobs
    correctly. (Jitendra Nath Pandey via ddas)

    MAPREDUCE-1836. Refresh for proxy superuser config (mr part for HDFS-1096).
    (Boris Shkolnik via shv)

    MAPREDUCE-1505. Create RPC client on job submission, not in cstr of Job
    instance. (Dick King via cdouglas)

    MAPREDUCE-1813. NPE in PipeMapred.MRErrorThread. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1225. Fixes DistributedCache to check if the file is fresh or not,
    for the first localization also. (Zhong Wang via amareshwari)

    MAPREDUCE-1559. Fixes the token renewer to use the JobTracker's 
    credentials for talking to the NameNode. (ddas)

    MAPREDUCE-1492. Delete  obsolete har files used on the parity files
    of hdfs raid. (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1857. Removes unused configuration parameters in streaming.
    (amareshwari)

    MAPREDUCE-1887. MRAsyncDiskService now properly absolutizes volume root
    paths. (Aaron Kimball via zshao)

    MAPREDUCE-1863. Fix NPE in Rumen when processing null CDF for failed task
    attempts. (Amar Kamat via cdouglas)

    MAPREDUCE-1864. Removes uninitialized/unused variables in
    org.apache.hadoop.streaming.PipeMapRed. (amareshwari)

    MAPREDUCE-1888. Fixes Streaming to override output key and value types, 
    only if mapper/reducer is a command. (Ravi Gummadi via amareshwari)

    MAPREDUCE-577. Fixes duplicate records in StreamXmlRecordReader.
    (Ravi Gummadi via amareshwari)

    MAPREDUCE-1894. Fixed a bug in DistributedRaidFileSystem.readFully() 
    that was causing it to loop infinitely. (Ramkumar Vadali via dhruba)

    MAPREDUCE-1838. Reduce the time needed for raiding a bunch of files
    by randomly assigning files to map tasks. (Ramkumar Vadali via dhruba)

    MAPREDUCE-1820. Fix InputSampler to clone sampled keys. (Alex Kozlov via
    cdouglas)

    MAPREDUCE-1528. Incorporates the changes to the credentials API done in
    HADOOP-6845. Also, introduces Credentials in JobConf, and in JobContext.
    (Jitendra Pandey and Arun Murthy via ddas)

    MAPREDUCE-1865. Rumen should also support jobhistory files generated using
    trunk. (Amar Kamat via amareshwari)

    MAPREDUCE-1621. Fixes NPE in TextOutputReader.getLastOutput if it has never
    read any output. (amareshwari)

    MAPREDUCE-1911. Fixes errors in -info message in streaming. (amareshwari) 

    MAPREDUCE-1772. Corrects errors in streaming documentation in forrest.
    (amareshwari)

    MAPREDUCE-1925. Fix failing TestRumenJobTraces. (Ravi Gummadi via cdouglas)

    MAPREDUCE-1718. Fixes a bug in the construction of jobconf key for the
    mapping that the tasks use at runtime for looking up delegation tokens.
    (Boris Shkolnik via ddas)

    MAPREDUCE-1701. Fixes a problem to do with exception handling in 
    delegation-token renewals. (Boris Shkolnik via ddas)

    MAPREDUCE-1686. Fixes StreamUtil.goodClassOrNull to find classes without
    package names. (Paul Burkhardt via amareshwari)

    MAPREDUCE-1288. Fixes TrackerDistributedCacheManager to take into account
    the owner of the localized file in the mapping from cache URIs to
    CacheStatus objects. (ddas)

    MAPREDUCE-1982. Fixes Rumen's TraceBuilder to extract job name from either 
    of configuration properties "mapreduce.job.name" and "mapred.job.name".
    (Ravi Gummadi via amareshwari)

    MAPREDUCE-1958. The MapReduce part corresponding to the HADOOP-6873.
    (Boris Shkolnik & Owen O'Malley via ddas)

    MAPREDUCE-1900. TaskTracker and JobTracker closes FileSystems, opened on
    behalf of users that it no longer requires. (Kan Zhang and ddas via ddas)

    MAPREDUCE-1992. Fixes a problem to do with bringing up the JobTracker in
    unsecure mode. (Kan Zhang via ddas)

    MAPREDUCE-1999. Fixes ClientProtocol to use the correct 
    DelegationTokenSelector. (Jitendra Pandey via ddas)

    MAPREDUCE-1780. AccessControlList.toString() is used for serialization of
    ACL in JobStatus.java. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1961. Fix ConcurrentModificationException in Gridmix during
    shutdown. (Hong Tang via cdouglas)

    MAPREDUCE-2000. Fix parsing of JobHistory lines in Rumen when quotes are
    escaped. (Hong Tang via cdouglas)

    MAPREDUCE-2022. Fixes compilation errors in TestSubmitJob. (amareshwari)

    MAPREDUCE-1670. RAID policies should not scan their own destination path.
    (Ramkumar Vadali via dhruba)

    MAPREDUCE-1668. RaidNode Hars a directory only if all its parity files 
    have been created. (Ramkumar Vadali via dhruba)

    MAPREDUCE-2021. Fixes duplicate hostnames in CombineFileInputFormat's
    split locations. (amareshwari)

    MAPREDUCE-1375. Fixes flaky test TestFileArgs. (Todd Lipcon via
    amareshwari)

    MAPREDUCE-2023. TestDFSIO should not stop reading if curSize != bufferSize.
    (Hong Tang via szetszwo)

    MAPREDUCE-2031. Fixes test failures TestTaskLauncher and
    TestTaskTrackerLocalization. (Ravi Gummadi via amareshwari)

    MAPREDUCE-2046. Fixes CombineFileInputFormat to allow splits with size
    less than DFS block size. (dhruba borthakur via amareshwari)

    MAPREDUCE-1975. Fixes unnecessary InterruptedException log in gridmix.
    (Ravi Gummadi via amareshwari)

    MAPREDUCE-1597. Fixes CombineFileInputFormat to work with non-splittable
    files. (amareshwari)

    MAPREDUCE-2032. Fixes TestJobCleanup to cleanup test directory in
    tearDown. (Dick King via amareshwari)

    MAPREDUCE-1979. Fixes "Output directory already exists" error in gridmix
    when gridmix.output.directory is not defined. (Ravi Gummadi via
    amareshwari)

    MAPREDUCE-1918. Adds documentation to Rumen. (Amar Kamat via amareshwari)

    MAPREDUCE-2078. Fixes TraceBuilder to generate traces when a globbed job
    history path is given. (Amar Kamat via amareshwari)

    MAPREDUCE-1989. Fixes error message in gridmix when user resolver is set
    and no user list is given. (Ravi Gummadi via amareshwari)

    MAPREDUCE-2067.  Distinct minicluster services (e.g. NN and JT) overwrite
    each other's service policies.  (Aaron T. Myers via tomwhite)

    MAPREDUCE-2029. DistributedRaidFileSystem removes itself from FileSystem
    cache when it is closed. (Ramkumar Vadali via dhruba)

    MAPREDUCE-1816. HAR files used for RAID parity-bite have configurable 
    partfile size. (Ramkumar Vadali via dhruba)

    MAPREDUCE-2082. Fixes Pipes to create the jobtoken file in the right
    place. (Jitendra Pandey via ddas)

    MAPREDUCE-2095. Fixes Gridmix to run from compressed traces. (Ranjit
    Mathew via amareshwari)

    MAPREDUCE-1908. DistributedRaidFileSystem now handles ChecksumException
    correctly. (Ramkumar Vadali via schen)

    MAPREDUCE-2126. JobQueueJobInProgressListener's javadoc is inconsistent
    with source code. (Jingguo Yao via tomwhite)

    MAPREDUCE-2143.  HarFileSystem is able to handle spaces in pathnames.
    (Ramkumar Vadali via dhruba)

    MAPREDUCE-1867.  Remove unused methods in
    org.apache.hadoop.streaming.StreamUtil.  (amareshwari via tomwhite)

    MAPREDUCE-2146.  Raid does not affect access time of a source file.
    (Ramkumar Vadali via dhruba)

    MAPREDUCE-2150.  RaidNode periodically fixes corrupt blocks. (Ramkumar Vadali via
    schen)

    MAPREDUCE-2099.  RaidNode recreates outdated parity HARs. (Ramkumar Vadali
    via schen)

    MAPREDUCE-2173.  Fix race condition in TestBlockFixer that was
    causing  intermittent failure (Patrick Kling via dhruba)

    MAPREDUCE-2142.  Refactor RaidNode so that the map-reduce component is
    clearly separated out. (Patrick Kling via dhruba)

    MAPREDUCE-2179. Fix RaidBlockSender compilation failure. (Ramkumar Vadali
    via schen)

    MAPREDUCE-2034. TestSubmitJob triggers NPE instead of permissions error.
    (Todd Lipcon via tomwhite)

    MAPREDUCE-2195. New property for local conf directory in
    system-test-mapreduce.xml file. (cos)

    MAPREDUCE-1783. FairScheduler initializes tasks only when the job can be
    run. (Ramkumar Vadali via schen)

    MAPREDUCE-2224. Fix synchronization bugs in JvmManager. (todd)

    MAPREDUCE-714. JobConf.findContainingJar unescapes unnecessarily on linux (todd)

    MAPREDUCE-2096. Secure local filesystem IO from symlink vulnerabilities (todd)

    MAPREDUCE-2234. If Localizer can't create task log directory, it should fail
    on the spot. (todd)

    MAPREDUCE-2219. JobTracker should not try to remove mapred.system.dir
    during startup. (todd)

    MAPREDUCE-2207. Task-cleanup task should not be scheduled on the node that
    the task just failed. (Liyin Liang via schen)

    MAPREDUCE-2084. Remove deprecate annotation for package file.  The package
    classes themselves are already deprecated. This removes an Eclipse error.
    (tomwhite via nigel)

    MAPREDUCE-2248. DistributedRaidFileSystem should unraid only the corrupt
    block (Ramkumar Vadali via schen)

    MAPREDUCE-1085. For tasks, "ulimit -v -1" is being run when user doesn't
    specify a ulimit (todd)

    MAPREDUCE-2282. Fix TestMRServerPorts for the changes in
    TestHDFSServerPorts.  (shv via szetszwo)

    MAPREDUCE-2238. Fix permissions handling to avoid leaving undeletable
    directories in local dirs. (todd)

    MAPREDUCE-2277. TestCapacitySchedulerWithJobTracker needs to wait for jobs
    to complete before testing status. (todd)

    MAPREDUCE-2253. Servlets should specify content type (todd)

    MAPREDUCE-2283. Add timeout for Raid Tests (Ramkumar Vadali via schen)

    MAPREDUCE-1754. Replace mapred.persmissions.supergroup with an 
    acl : mapreduce.cluster.administrators (Amareshwari Sriramadasu via shv)

    MAPREDUCE-2256. FairScheduler fairshare preemption from multiple pools may
    preempt all tasks from one pool causing that pool to go below fairshare.
    (Priyo Mustafi via shv)

    MAPREDUCE-2281. MR part of HADOOP-6642. (Chris Douglas, Po Cheung via shv)

    MAPREDUCE-2200. TestUmbilicalProtocolWithJobToken is failing without Krb
    evironment: needs to be conditional. (cos)

    MAPREDUCE-2077. Resolve name clash in the deprecated 
    o.a.h.util.MemoryCalculatorPlugin (Luke Lu via shv)

    MAPREDUCE-2188. The new API MultithreadedMapper doesn't initialize
    RecordReader. (Owen O'Malley via shv)

    MAPREDUCE-1915. Fix IndexOutOfBoundsException in IndexCache.
    (Priyo Mustafi via shv)

    MAPREDUCE-1974. Fix multiple preemtions of the same task in FairScheduler.
    (Scott Chen via shv)

    MAPREDUCE-2304. Fix TestMRCLI to allow hostname with a hyphen (-).
    (Priyo Mustafi via shv)

    MAPREDUCE-1825. jobqueue_details.jsp and FairSchedulerServelet should not
    call finishedMaps and finishedReduces when job is not initialized.
    (Scott Chen via shv)

    MAPREDUCE-2285. MiniMRCluster does not start after ant test-patch
    (todd)

    MAPREDUCE-2315. javadoc is failing in nightly build (todd)

    MAPREDUCE-2054. Hierarchical queue implementation broke dynamic queue
    addition in Dynamic Scheduler. (Thomas Sandholm via tomwhite)

    MAPREDUCE-2272. Job ACL file should not be executable
    (Harsh J Chouraria via todd)

    MAPREDUCE-2241. ClusterWithLinuxTaskController should accept relative path
    on the command line. (todd)

    MAPREDUCE-2251. Remove unused mapreduce.job.userhistorylocation config.
    (Harsh J Chouraria via todd)

    MAPREDUCE-2284. TestLocalRunner.testMultiMaps times out (todd)

    MAPREDUCE-2336. Tool-related packages should be in the Tool javadoc group.
    (tomwhite)
    
    MAPREDUCE-2394. JUnit output format doesn't propagate into raid contrib
    build. (todd)

    MAPREDUCE-2392. TaskTracker shutdown in the tests sometimes take 60s.
    (tomwhite)

    MAPREDUCE-2437. SLive uses only part* files to generating the final report.
    (shv)

    MAPREDUCE-2428. start-mapred.sh script fails if HADOOP_HOME is not set.
    (tomwhite via eli)

    MAPREDUCE-2445. Fix TestMiniMRWithDFSWithDistinctUsers to be a valid test.
    (todd)

    MAPREDUCE-2457. Job submission should inject group.name on the JobTracker
    (Alejandro Abdelnur via todd)

    MAPREDUCE-2472. Extra whitespace in mapred.child.java.opts breaks JVM
    initialization. (Aaron T. Myers via todd)

    MAPREDUCE-2222. Ivy resolve force mode should be turned off by default.
    (Luke Lu via tomwhite)

    MAPREDUCE-2486. Incorrect snapshot dependency published in .pom files
    (todd)

    MAPREDUCE-2327. MapTask doesn't need to put username information in
    SpillRecord. (todd via tomwhite)

    MAPREDUCE-2515. MapReduce code references some deprecated options
    (Ari Rabkin via todd)

    MAPREDUCE-2487. ChainReducer uses MAPPER_BY_VALUE instead of
    REDUCER_BY_VALUE. (Devaraj K via todd)

    MAPREDUCE-2185. Fix infinite loop at creating splits using
    CombineFileInputFormat. (Ramkumar Vadali via schen)

    MAPREDUCE-2571. CombineFileInputFormat.getSplits throws a
    java.lang.ArrayStoreException. (Bochun Bai via todd)

    MAPREDUCE-2767. Remove Linux task-controller. (Milind Bhandarkar via shv) 

    MAPREDUCE-2991. queueinfo.jsp fails to show queue status for Capacity 
    scheduler if queue names contain special symbols. (Priyo Mustafi via shv)

    MAPREDUCE-2531. Fixed jobcontrol to downgrade JobID. (Robert Evans via
    acmurthy) 

    MAPREDUCE-3139. SlivePartitioner generates negative partitions. (jghoman)

Release 0.21.1 - Unreleased

  NEW FEATURES

    MAPREDUCE-2040. Forrest Documentation for Dynamic Priority Scheduler.
    (Thomas Sandholm via tomwhite)

  BUG FIXES

    MAPREDUCE-1897. trunk build broken on compile-mapred-test (cos)

    MAPREDUCE-1280. Update Eclipse plugin to the new eclipse.jdt API.
    (Alex Kozlov via szetszwo)

    MAPREDUCE-1984. herriot TestCluster fails because exclusion is not there
    (Balaji Rajagopalan via cos)

    MAPREDUCE-2090. Clover build doesn't generate per-test coverage. (cos)

    MAPREDUCE-2134. ant binary-system is broken in mapreduce project. (cos)

    MAPREDUCE-1905. Fixes Context.setStatus() and progress() apis.
    (amareshwari)

    MAPREDUCE-1809. Ant build changes for Streaming system tests in contrib
    projects. (Vinay Kumar Thota via amareshwari)

    MAPREDUCE-2223. TestMRCLI might fail on Ubuntu with default /etc/hosts
    (cos)

    MAPREDUCE-2228. Remove java5 dependencies from build. (cos)

    MAPREDUCE-1929. Allow artifacts to be published to the staging Apache Nexus
    Maven Repository. (tomwhite)

    MAPREDUCE-2317. Fix a NPE in HadoopArchives.  (Devaraj K via szetszwo)

    MAPREDUCE-2127. mapreduce trunk builds are filing on hudson. 
    (Bruno Mahé via eli)

    MAPREDUCE-2779. JobSplitWriter.java can't handle large job.split file.
    (Ming Ma via shv)

Release 0.21.0 - 2010-08-13

  INCOMPATIBLE CHANGES

    MAPREDUCE-516. Fix the starvation problem in the Capacity Scheduler 
    when running High RAM Jobs. (Arun Murthy via yhemanth)

    MAPREDUCE-358. Change org.apache.hadoop.examples. AggregateWordCount 
    and org.apache.hadoop.examples.AggregateWordHistogram to use new 
    mapreduce api. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-245. Change Job and jobcontrol classes to use the List interface
    rather than ArrayList in APIs. (Tom White via cdouglas)

    MAPREDUCE-766. Enhanced list-blacklisted-trackers to display reasons
    for blacklisting a node. (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-817. Add a cache for retired jobs with minimal job info and 
    provide a way to access history file url. (sharad)

    MAPREDUCE-711. Moved Distributed Cache from Common to Map/Reduce
    project. (Vinod Kumar Vavilapalli via yhemanth)

    MAPREDUCE-895. Per the contract elucidated in HADOOP-6201, throw
    FileNotFoundException from FileSystem::listStatus rather than returning
    null. (Jakob Homan via cdouglas)

    MAPREDUCE-479. Provide full task id to map output servlet rather than the
    reduce id, only. (Jiaqi Tan via cdouglas)

    MAPREDUCE-873. Simplify job recovery. Incomplete jobs are resubmitted on 
    jobtracker restart. Removes a public constructor in JobInProgress. (sharad)

    HADOOP-6230. Moved process tree and memory calculator related classes from
    Common to Map/Reduce. (Vinod Kumar Vavilapalli via yhemanth)

    MAPREDUCE-157. Refactor job history APIs and change the history format to 
    JSON. (Jothi Padmanabhan via sharad)

    MAPREDUCE-849. Rename configuration properties. (Amareshwari Sriramadasu 
    via sharad)

    MAPREDUCE-1287. Only call the partitioner with more than one reducer.
    (cdouglas)

    MAPREDUCE-1385. Use the new UserGroupInformation from HADOOP-6299.
    (ddas via omalley)

    MAPREDUCE-1493. Authorization for job-history pages. (vinodkv)

    MAPREDUCE-1607. Task controller may not set permissions for a
    task cleanup attempt's log directory (Amareshwari Sriramadasu via vinodkv)

    MAPREDUCE-1683. Remove JNI calls from ClusterStatus cstr. (Arun Murthy and
    Luke Lu via cdouglas)

    MAPREDUCE-1855. Makes the refresh methods (for groups and proxy users) 
    independent of the client side configuration. (Boris Shkolnik via ddas)

  NEW FEATURES

    MAPREDUCE-1774. Large-scale Automated Framework (Sharad Agarwal, Sreekanth
    Ramakrishnan, Konstantin Boudnik, at all via cos)

    MAPREDUCE-706. Support for FIFO pools in the fair scheduler.
    (Matei Zaharia)

    MAPREDUCE-546. Provide sample fair scheduler config file in conf/ and use
    it by default if no other config file is specified. (Matei Zaharia)

    MAPREDUCE-551. Preemption support in the Fair Scheduler. (Matei Zaharia)

    MAPREDUCE-567. Add a new example MR that always fails. (Philip Zeyliger
    via tomwhite)

    MAPREDUCE-211. Provides ability to run a health check script on the
    tasktracker nodes and blacklist nodes if they are unhealthy.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-637. Add an example, distbbp, which able to compute the n th bit
    of Pi for some large n.  (szetszwo)

    MAPREDUCE-532. Provide a way to limit the number of used slots 
    per queue in the capacity scheduler.
    (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-467. Provide ability to collect statistics about total tasks 
    and succeeded tasks in different time windows. (sharad)

    MAPREDUCE-740. Log a job-summary at the end of a job, while allowing it
    to be configured to use a custom appender if desired. (acmurthy)

    MAPREDUCE-814. Provide a way to configure completed job history files 
    to be on HDFS. (sharad)

    MAPREDUCE-800. MRUnit should support the new API. (Aaron Kimball via
    tomwhite)

    MAPREDUCE-798. MRUnit should be able to test a succession of MapReduce
    passes. (Aaron Kimball via tomwhite)

    MAPREDUCE-768. Provide an option to dump jobtracker configuration in JSON
    format to standard output. (V.V.Chaitanya Krishna via yhemanth)

    MAPREDUCE-824. Add support for a hierarchy of queues in the capacity 
    scheduler. (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-751. Add Rumen, a tool for extracting statistics from job tracker
    logs and generating job traces for simulation and analysis. (Dick King via
    cdouglas)

    MAPREDUCE-830. Add support for splittable compression to TextInputFormats.
    (Abdul Qadeer via cdouglas)

    MAPREDUCE-861. Add support for hierarchical queues in the Map/Reduce
    framework. (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-776. Add Gridmix, a benchmark processing Rumen traces to simulate
    a measured mix of jobs on a cluster. (cdouglas)

    MAPREDUCE-862. Enhance JobTracker UI to display hierarchical queues.
    (V.V.Chaitanya Krishna via yhemanth)

    MAPREDUCE-777. Brand new apis to track and query jobs as a
    replacement for JobClient. (Amareshwari Sriramadasu via acmurthy)

    MAPREDUCE-775. Add native and streaming support for Vertica as an input
    or output format taking advantage of parallel read and write properties of 
    the DBMS. (Omer Trajman via ddas)

    MAPREDUCE-679. XML-based metrics as JSP servlet for JobTracker.
    (Aaron Kimball via tomwhite)

    MAPREDUCE-980. Modify JobHistory to use Avro for serialization. (cutting)

    MAPREDUCE-728. Add Mumak, a Hadoop map/reduce simulator. (Arun C Murthy,
    Tamas Sarlos, Anirban Dasgupta, Guanying Wang, and Hong Tang via cdouglas)

    MAPREDUCE-1383. Automates fetching of delegation tokens in File*Formats
    Distributed Cache and Distcp. Also, provides a config 
    mapreduce.job.hdfs-servers that the jobs can populate with a comma
    separated list of namenodes. The job client automatically fetches
    delegation tokens from those namenodes. (Boris Shkolnik via ddas)    

    MAPREDUCE-698. Per-pool task limits for the fair scheduler.
    (Kevin Peterson via matei)

    MAPREDUCE-1026. Does mutual authentication of the shuffle
    transfers using a shared JobTracker generated key.
    (Boris Shkolnik via ddas)

    MAPREDUCE-744. Introduces the notion of a public distributed cache.
    (Devaraj Das)

    MAPREDUCE-1338. Introduces the notion of token cache using which
    tokens and secrets can be sent by the Job client to the JobTracker.
    (Boris Shkolnik via ddas)

    HDFS-503. This patch implements an optional layer over HDFS that 
    implements offline erasure-coding.  It can be used to reduce the 
    total storage requirements of HDFS.  (dhruba)

    MAPREDUCE-1432. Adds hooks in the jobtracker and tasktracker 
    for loading the tokens in the user's ugi. This is required
    for the copying of files from the hdfs. (ddas)

    MAPREDUCE-1335. Adds SASL Kerberos/Digest authentication in MapReduce.
    (Kan Zhang via ddas)

    MAPREDUCE-1464. Makes a compatible change in JobTokenIdentifier to
    account for HADOOP-6510. (Jitendra Nath Pandey via ddas)

    MAPREDUCE-1433. Add a delegation token for MapReduce. (omalley)

    MAPREDUCE-1307. Introduces the Job level ACLs feature. 
    (Vinod Kumar Vavilapalli via ddas)

    MAPREDUCE-1430. JobTracker automatically renews delegation tokens for jobs.
    (Boris Shkolnik via ddas)

    MAPREDUCE-1455. Introduces job-level authorization for mapreduce servlets.
    (Ravi Gummadi via vinodkv)

  IMPROVEMENTS

    MAPREDUCE-463. Makes job setup and cleanup tasks as optional.
    (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-502. Allow jobtracker to be configured with zero completed jobs
    in memory. (Amar Kamat via sharad)

    MAPREDUCE-416. Moves the history file to a "done" folder whenever a job 
    completes. (Amar Kamat via ddas)

    MAPREDUCE-646. Increase srcfilelist replication number in dictcp job.
    (Ravi Gummadi via szetszwo)
   
    HADOOP-6106. Updated hadoop-core and test jars from hudson trunk 
    build #12. (Giridharan Kesavan)

    MAPREDUCE-642. A option to distcp that allows preserving the full
    source path of a file in the specified destination directory.
    (Rodrigo Schmidt via dhruba)

    MAPREDUCE-686. Move TestSpeculativeExecution.Fake* into a separate class
    so that it can be used by other tests. (Jothi Padmanabhan via sharad)

    MAPREDUCE-625. Modify TestTaskLimits to improve execution time.
    (Jothi Padmanabhan via sharad)

    MAPREDUCE-465. Deprecate o.a.h.mapred.lib.MultithreadedMapRunner and add
    test for o.a.h.mapreduce.lib.MultithreadedMapper.
    (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-701. Improves the runtime of the TestRackAwareTaskPlacement
    by making it a unit test.  (Jothi Padmanabhan via ddas)

    MAPREDUCE-371. Change KeyFieldBasedComparator and KeyFieldBasedPartitioner
    to use new api. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-623. Resolve javac warnings in mapreduce. (Jothi Padmanabhan
    via sharad)

    MAPREDUCE-655. Change KeyValueLineRecordReader and KeyValueTextInputFormat
    to use new mapreduce api. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-632. Merge TestCustomOutputCommitter with 
    TestCommandLineJobSubmission. (Jothi Padmanabhan via sharad)

    MAPREDUCE-627. Improves execution time of TestTrackerBlacklistAcrossJobs.
    (Jothi Padmanabhan via ddas)

    MAPREDUCE-630. Improves execution time of TestKillCompletedJob.
    (Jothi Padmanabhan via ddas)

    MAPREDUCE-626. Improves the execution time of TestLostTracker.
    (Jothi Padmanabhan via ddas)

    MAPREDUCE-353. Makes the shuffle read and connection timeouts
    configurable. (Ravi Gummadi via ddas)

    MAPREDUCE-739. Allow relative paths to be created in archives. (Mahadev
    Konar via cdouglas)

    MAPREDUCE-772. Merge HADOOP-4010 changes to LineRecordReader into mapreduce
    package. (Abdul Qadeer via cdouglas)

    MAPREDUCE-785. Separate sub-test of TestReduceFetch to be included in
    MR-670. (Jothi Padmanabhan via cdouglas)

    MAPREDUCE-784. Modify TestUserDefinedCounters to use LocalJobRunner 
    instead of MiniMR. (Jothi Padmanabhan via sharad)

    HADOOP-6160. Fix releaseaudit target to run on specific directories. 
    (gkesavan)

    MAPREDUCE-782. Use PureJavaCrc32 in SpillRecord.  (Todd Lipcon via
    szetszwo)

    MAPREDUCE-369. Change org.apache.hadoop.mapred.lib.MultipleInputs to 
    use new api. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-373. Change org.apache.hadoop.mapred.lib.FieldSelectionMapReduce
    to use new api. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-628. Improves the execution time of TestJobInProgress.
    (Jothi Padmanabhan via ddas)

    MAPREDUCE-793. Creates a new test that consolidates a few tests to
    include in the commit-test list. (Jothi Padmanabhan via ddas)
    
    MAPREDUCE-797. Adds combiner support to MRUnit MapReduceDriver.
    (Aaron Kimball via johan)    

    MAPREDUCE-656. Change org.apache.hadoop.mapred.SequenceFile* classes
    to use new mapreduce api. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-670. Creates ant target for 10 mins patch test build.
    (Jothi Padmanabhan via gkesavan)

    MAPREDUCE-375. Change org.apache.hadoop.mapred.lib.NLineInputFormat 
    and org.apache.hadoop.mapred.MapFileOutputFormat to use new api.
    (Amareshwari Sriramadasu via ddas)

    MAPREDUCE-779. Added node health failure counts into 
    JobTrackerStatistics. (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-842. Setup secure permissions for localized job files,
    intermediate outputs and log files on tasktrackers.
    (Vinod Kumar Vavilapalli via yhemanth)
    
    MAPREDUCE-478. Allow map and reduce jvm parameters, environment variables
    and ulimit to be set separately.
    Configuration changes:
      add mapred.map.child.java.opts
      add mapred.reduce.child.java.opts
      add mapred.map.child.env
      add mapred.reduce.child.ulimit
      add mapred.map.child.env
      add mapred.reduce.child.ulimit
      deprecated mapred.child.java.opts
      deprecated mapred.child.env
      deprecated mapred.child.ulimit
    (acmurthy)

    MAPREDUCE-767. Remove the dependence on the CLI 2.0 snapshot.
    (Amar Kamat via omalley)

    MAPREDUCE-712. Minor efficiency tweaks to RandomTextWriter. (cdouglas)

    MAPREDUCE-870. Remove the job retire thread and the associated 
    config parameters. (sharad)

    MAPREDUCE-874. Rename the PiEstimator example to QuasiMonteCarlo.
    (szetszwo)

    MAPREDUCE-336. Allow logging level of map/reduce tasks to be configurable. 
    Configuration changes:
      add mapred.map.child.log.level 
      add mapred.reduce.child.log.level 
    (acmurthy)

    MAPREDUCE-355. Update mapred.join package to use the new API. (Amareshwari
    Sriramadasu via cdouglas)

    HADOOP-6184. Updated hadoop common and test jars to get the new API
    in Configuration for dumping in JSON format from Hudson trunk build #68.
    (yhemanth)

    MAPREDUCE-476. Extend DistributedCache to work locally (LocalJobRunner).
    (Philip Zeyliger via tomwhite)

    MAPREDUCE-825. JobClient completion poll interval of 5s causes slow tests
    in local mode. (Aaron Kimball via tomwhite)

    MAPREDUCE-910. Support counters in MRUnit. (Aaron Kimball via cdouglas)

    MAPREDUCE-788. Update gridmix2 to use the new API (Amareshwari Sriramadasu
    via cdouglas)

    MAPREDUCE-875. Make DBRecordReader execute queries lazily. (Aaron Kimball 
    via enis)

    MAPREDUCE-318. Modularizes the shuffle code. (Jothi Padmanabhan and 
    Arun Murthy via ddas)

    MAPREDUCE-936. Allow a load difference for fairshare scheduler.
    (Zheng Shao via dhruba)

    MAPREDUCE-370. Update MultipleOutputs to use the API, merge funcitonality
    of MultipleOutputFormat. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-898. Changes DistributedCache to use the new API.
    (Amareshwari Sriramadasu via ddas)

    MAPREDUCE-144. Includes dump of the process tree in task diagnostics when 
    a task is killed due to exceeding memory limits.
    (Vinod Kumar Vavilapalli via yhemanth)

    MAPREDUCE-945. Modifies MRBench and TestMapRed to use ToolRunner so that
    options such as queue name can be passed via command line.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-963. Deprecate o.a.h.mapred.FileAlreadyExistsException and
    replace it with o.a.h.fs.FileAlreadyExistsException.  (Boris Shkolnik
    via szetszwo)

    MAPREDUCE-960. Remove an unnecessary intermediate copy and obsolete API
    from KeyValueLineRecordReader. (cdouglas)

    MAPREDUCE-930. Modify Rumen to resolve paths in the canonical way, rather
    than defaulting to the local filesystem. (cdouglas)

    MAPREDUCE-944. Extend the LoadManager API of the fair-share scheduler
    to support regulating tasks for a job based on resources currently in use
    by that job. (dhruba)

    MAPREDUCE-973. Move FailJob and SleepJob from examples to test. (cdouglas 
    via omalley)

    MAPREDUCE-966. Modify Rumen to clean up interfaces and simplify integration
    with other tools. (Hong Tang via cdouglas)

    MAPREDUCE-856. Setup secure permissions for distributed cache files.
    (Vinod Kumar Vavilapalli via yhemanth)

    MAPREDUCE-885. More efficient SQL queries for DBInputFormat. (Aaron Kimball 
    via enis)

    MAPREDUCE-284. Enables ipc.client.tcpnodelay in Tasktracker's Child.
    (Ravi Gummadi via sharad)

    MAPREDUCE-916. Split the documentation to match the project split.
    (Corinne Chandel via omalley)

    MAPREDUCE-649. Validate a copy by comparing the source and destination
    checksums in distcp. Also adds an intra-task retry mechanism for errors
    detected during the copy. (Ravi Gummadi via cdouglas)

    MAPREDUCE-654. Add a -dryrun option to distcp printing a summary of the
    file data to be copied, without actually performing the copy. (Ravi Gummadi
    via cdouglas)

    MAPREDUCE-664. Display the number of files deleted by distcp when the
    -delete option is specified. (Ravi Gummadi via cdouglas)

    MAPREDUCE-781. Let the name of distcp jobs be configurable. (Venkatesh S
    via cdouglas)

    MAPREDUCE-975. Add an API in job client to get the history file url for 
    a given job id. (sharad)

    MAPREDUCE-905. Add Eclipse launch tasks for MapReduce. (Philip Zeyliger
    via tomwhite)

    MAPREDUCE-277. Makes job history counters available on the job history
    viewers. (Jothi Padmanabhan via ddas)

    MAPREDUCE-893. Provides an ability to refresh queue configuration
    without restarting the JobTracker.
    (Vinod Kumar Vavilapalli and Rahul Kumar Singh via yhemanth)

    MAPREDUCE-1011. Add build.properties to svn and git ignore. (omalley)

    MAPREDUCE-954. Change Map-Reduce context objects to be interfaces.
    (acmurthy) 

    MAPREDUCE-639. Change Terasort example to reflect the 2009 updates. 
    (omalley)

    MAPREDUCE-1063. Document gridmix benchmark. (cdouglas)

    MAPREDUCE-931. Use built-in interpolation classes for making up task
    runtimes in Rumen. (Dick King via cdouglas)

    MAPREDUCE-1012. Mark Context interfaces as public evolving. (Tom White via
    cdouglas)

    MAPREDUCE-971. Document use of distcp when copying to s3, managing timeouts
    in particular. (Aaron Kimball via cdouglas)

    HDFS-663. DFSIO for append. (shv)

    HDFS-641. Move all of the components that depend on map/reduce to 
    map/reduce. (omalley)

    HADOOP-5107. Use Maven ant tasks to publish artifacts. (Giridharan Kesavan
    via omalley)

    MAPREDUCE-1229. Allow customization of job submission policy in Mumak.
    (Hong Tang via cdouglas)

    MAPREDUCE-1317. Reduce the memory footprint of Rumen objects by interning
    host Strings. (Hong Tang via cdouglas)

    MAPREDUCE-1097. Add support for Vertica 3.5 to its contrib module. (Omer
    Trajman via cdouglas)

    MAPREDUCE-1627. HadoopArchives should not uses a method in DistCp.
    (szetszwo)

    MAPREDUCE-1198. Alternatively schedule different types of tasks in
    fair share scheduler. (Scott Chen via matei)

    MAPREDUCE-707. Provide a jobconf property for explicitly assigning a job to 
    a pool in the Fair Scheduler. (Alan Heirich via matei)

    MAPREDUCE-947. Added commitJob and abortJob apis to OutputCommitter.
    Enhanced FileOutputCommitter to create a _SUCCESS file for successful
    jobs. (Amar Kamat & Jothi Padmanabhan via acmurthy) 

    MAPREDUCE-1103. Added more metrics to Jobtracker. (sharad) 

    MAPREDUCE-1048. Add occupied/reserved slot usage summary on jobtracker UI.
    (Amareshwari Sriramadasu and Hemanth Yamijala via sharad)

    MAPREDUCE-1090. Modified log statement in TaskMemoryManagerThread to
    include task attempt id. (yhemanth)

    MAPREDUCE-1189. Reduce ivy console output to ovservable level (cos)

    MAPREDUCE-1167. ProcfsBasedProcessTree collects rss memory information.
    (Scott Chen via dhruba)

    MAPREDUCE-1231. Added a new DistCp option, -skipcrccheck, so that the CRC
    check during setup can be skipped.  (Jothi Padmanabhan via szetszwo)

    MAPREDUCE-1190. Add package documentation for BBP example.
    (Tsz Wo (Nicholas) Sze via cdouglas)

    MAPREDUCE-1119. When tasks fail to report status, show tasks's stack dump
    before killing. (Aaron Kimball via tomwhite)

    MAPREDUCE-1185. Redirect running job url to history url if job is already 
    retired. (Amareshwari Sriramadasu and Sharad Agarwal via sharad)

    MAPREDUCE-1050. Introduce a mock object testing framework. (tomwhite)

    MAPREDUCE-1084. Implementing aspects development and fault injeciton
    framework for MapReduce. (Sreekanth Ramakrishnan via cos)

    MAPREDUCE-1209. Move common specific part of the test TestReflectionUtils
    out of mapred into common. (Todd Lipcon via tomwhite)

    MAPREDUCE-967. TaskTracker does not need to fully unjar job jars.
    (Todd Lipcon via tomwhite)

    MAPREDUCE-1083. Changes in MapReduce so that group information of users 
    can be refreshed in the JobTracker via command line. 
    (Boris Shkolnik via ddas)

    MAPREDUCE-181. Changes the job submission process to be secure.
    (Devaraj Das)

    MAPREDUCE-1250. Refactors the JobToken to use Common's Token interface.
    (Kan Zhang via ddas)

    MAPREDUCE-896. Enhance tasktracker to cleanup files that might have
    been created by user tasks with non-writable permissions.
    (Ravi Gummadi via yhemanth)

    MAPREDUCE-372. Change org.apache.hadoop.mapred.lib.ChainMapper/Reducer 
    to use new mapreduce api. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-1295. Add a tool in Rumen for folding and manipulating job
    traces. (Dick King via cdouglas)

    MAPREDUCE-1302. TrackerDistributedCacheManager deletes file
    asynchronously, thus reducing task initialization delays.
    (Zheng Shao via dhruba)

    MAPREDUCE-1218. TaskTrackers send cpu and memory usage of
    node to JobTracker. (Scott Chen via dhruba)

    MAPREDUCE-847. Fix Releaseaudit warning count to zero
    (Giridharan Kesavan)

    MAPREDUCE-1337. Use generics in StreamJob to improve readability of that
    class. (Kay Kay via cdouglas)

    MAPREDUCE-361. Port terasort example to the new mapreduce API. (Amareshwari
    Sriramadasu via cdouglas)

    MAPREDUCE-1367. LocalJobRunner should support parallel mapper execution.
    (Aaron Kimball via tomwhite)

    MAPREDUCE-64. Eliminate io.sort.record.percent from MapTask configuration.
    (cdouglas)

    MAPREDUCE-1440. Replace the long user name in MapReduce with the local
    name. (omalley)

    MAPREDUCE-1470. Move delegation tokens from HDFS to Common so that 
    MapReduce can use them too. (omalley)

    MAPREDUCE-1425. Reduce memory usage by archive. (mahadev via szetszwo)

    MAPREDUCE-1441. Trim whitespace from directory lists pulled from the
    configuration. (Todd Lipcon via cdouglas)

    MAPREDUCE-1309. Refactor Rumen trace generator to improve code structure
    and add extensible support for log formats. (Dick King via cdouglas)

    MAPREDUCE-1503. Delegation token renewing and cancelling should provide
    meaningful exceptions when there are failures instead of returning 
    false. (omalley)

    HADOOP-6579. Upgrade commons-codec library to 1.4. (omalley)

    MAPREDUCE-1423. Improve performance of CombineFileInputFormat when multiple
    pools are configured. (Dhruba Borthakur via zshao)

    MAPREDUCE-1454. Quote user supplied strings in Tracker servlets. (cdouglas)

    MAPREDUCE-1408. Add customizable job submission policies to Gridmix. (Rahul
    Singh via cdouglas)

    MAPREDUCE-1527. Better warning logged when mapred.queue.names is
    overshadowed by mapred-queues.xml. (Hong Tang via acmurthy)

    MAPREDUCE-1403. Save the size and number of distributed cache artifacts in
    the configuration. (Arun Murthy via cdouglas)

    MAPREDUCE-1482. Truncate state string and diagnostic information in
    TaskStatus. (Amar Kamat via szetszwo)

    MAPREDUCE-1593.  [Rumen] Improvements to random seed generation (tamas via
    mahadev)

    MAPREDUCE-1460. Oracle support in DataDrivenDBInputFormat.
    (Aaron Kimball via tomwhite)

    MAPREDUCE-1569. Pass configuration through mocked contexts in MRUnit.
    (Chris White via cdouglas)

    MAPREDUCE-1590. Move HarFileSystem from Hadoop Common to Mapreduce tools.
    (mahadev)

    MAPREDUCE-1629. Get rid of fakeBlockLocations() on HarFileSystem, since
    it's not used (mahadev)

    MAPREDUCE-1489. DataDrivenDBInputFormat should not query the database
    when generating only one split. (Aaron Kimball via tomwhite)

    MAPREDUCE-1514.  Add documentation on replication, permissions, new options,
    limitations and internals of har.  (mahadev via szetszwo)

    MAPREDUCE-1428.  Make block size and the size of archive created files
    configurable.  (mahadev via szetszwo)

    MAPREDUCE-1656. JobStory should provide queue info. (hong via mahadev)

    MAPREDUCE-1466. Record number of files processed in FileInputFormat in the
    Configuration for offline analysis. (Luke Lu and Arun Murthy via cdouglas)

    MAPREDUCE-1538. TrackerDistributedCacheManager manages the
    number of files. (Scott Chen via dhruba)

    MAPREDUCE-1673. Scripts to start and stop RaidNode.
    (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1659. RaidNode writes temp files on configured tmp directory and
    add random numbers to their names to avoid conflicts
    (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1221. Allow admins to control physical memory limits per-task
    and per-node. (Scott Chen via acmurthy) 

    MAPREDUCE-1065. Update mapred tutorial to use the new API. (Aaron Kimball
    via cdouglas)

    MAPREDUCE-1304. Add a task counter tracking time spent in GC. (Aaron
    Kimball via cdouglas)

    MAPREDUCE-1570. Add grouping comparators to MRUnit. (Chris White via
    cdouglas)

    MAPREDUCE-1650. Exclude Private elements from generated MapReduce
    Javadoc. (tomwhite)

    MAPREDUCE-1625. Improve grouping of packages in Javadoc. (tomwhite)

    MAPREDUCE-1417. Forrest documentation should be updated to reflect 
    the changes in MAPREDUCE-744. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1568. TrackerDistributedCacheManager should clean up cache
    in a background thread. (Scott Chen via zshao)

    MAPREDUCE-1749. Move configuration strings out of JobContext so that it
    can be made public stable. (omalley)

    MAPREDUCE-1623. Apply audience and stability notations to Hadoop
    Map-Reduce. (tomwhite via acmurthy) 

    MAPREDUCE-1751. Change MapReduce to depend on Hadoop 'common' artifacts
    instead of 'core'. (tomwhite)

    MAPREDUCE-1535.  Replace usage of FileStatus#isDir().  (Eli Collins via
    tomwhite)

    MAPREDUCE-1832. Allow file sizes less than 1MB in DFSIO benchmark. (shv)

    MAPREDUCE-1404.  Move Cluster-Setup and Single-Node-Setup Docs from
    MapReduce to Common.  (tomwhite)

    MAPREDUCE-1697. Document the behavior of -file option and deprecate it
    in favour of -files option in streaming. (Amareshwari Sriramadasu
    via vinodkv)

    MAPREDUCE-1033. Resolve location of scripts and configuration files after
    project split. (tomwhite)

    MAPREDUCE-1018. Document changes to the memory management and scheduling
    model. (Hemanth Yamijala via vinodkv)

    MAPREDUCE-1896. [Herriot] New property for multi user list. (Vinay Thota
    via cos)

    MAPREDUCE-1812. New properties for suspend and resume process. (Vinay
    Thota via cos)

  OPTIMIZATIONS

    MAPREDUCE-270. Fix the tasktracker to optionally send an out-of-band
    heartbeat on task-completion for better job-latency. (acmurthy) 
    Configuration changes:
      add mapreduce.tasktracker.outofband.heartbeat 

    MAPREDUCE-1186. Modified code in distributed cache to set permissions
    only on required set of localized paths.
    (Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1501. FileInputFormat supports multi-level, recursive 
    directory listing.  (Zheng Shao via dhruba)

    MAPREDUCE-1556. upgrade to Avro 1.3.0. (cutting via tomwhite)

    MAPREDUCE-1613. Install/deploy source jars to Maven repo 
    (Patrick Angeles via ddas)

    MAPREDUCE-1610. Forrest documentation should be updated to reflect
    the changes in MAPREDUCE-856. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1853. Adds caching for TaskAttemptContext in MultipleOutputs.
    (Torsten Curdt via amareshwari)

  BUG FIXES

    MAPREDUCE-878. Rename fair scheduler design doc to 
    fair-scheduler-design-doc.tex and add Apache license header (matei)

    HADOOP-4687. MapReduce is split from Hadoop Core. It is a subproject under 
    Hadoop (Owen O'Malley)

    HADOOP-6096. Fix Eclipse project and classpath files following project
    split. (tomwhite)

    MAPREDUCE-419. Reconcile mapred.userlog.limit.kb defaults in configuration
    and code. (Philip Zeyliger via cdouglas)

    MAPREDUCE-2. Fixes a bug in KeyFieldBasedPartitioner in handling empty
    keys. (Amar Kamat via sharad)

    MAPREDUCE-130. Delete the jobconf copy from the log directory of the 
    JobTracker when the job is retired. (Amar Kamat via sharad)

    MAPREDUCE-657. Fix hardcoded filesystem problem in CompletedJobStatusStore.
    (Amar Kamat via sharad)

    MAPREDUCE-179. Update progress in new RecordReaders. (cdouglas)

    MAPREDUCE-658. Replace NPE in distcp with a meaningful error message when
    the source path does not exist. (Ravi Gummadi via cdouglas)

    MAPREDUCE-671. Update ignore list to include untracked, generated
    build artifacts and config files. (cdouglas)

    MAPREDUCE-433. Use more reliable counters in TestReduceFetch. (cdouglas)

    MAPREDUCE-124. Fix a bug in failure handling of abort task of 
    OutputCommiter. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-694. Fix to add jsp-api jars to capacity-scheduler classpath.
    (Giridharan Kesavan)
    
    MAPREDUCE-702. Fix eclipse-plugin jar target (Giridharan Kesavan) 

    MAPREDUCE-522. Replace TestQueueCapacities with simpler test case to
    test integration between capacity scheduler and MR framework.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-683. Fixes an initialization problem in the JobHistory. 
    The initialization of JobHistoryFilesManager is now done in the 
    JobHistory.init call. (Amar Kamat via ddas)

    MAPREDUCE-708. Fixes a bug to allow updating the reason for
    blacklisting a node on the JobTracker UI.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-709. Fixes message displayed for a blacklisted node where
    the reason for blacklisting is due to the health check script
    timing out. (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-676. Existing diagnostic rules fail for MAP ONLY jobs.
    (Suhas Gogate via tomwhite)

    MAPREDUCE-722. Fixes a bug with tasktracker reservations for
    high memory jobs in capacity scheduler.
    (Vinod Kumar Vavilapalli via yhemanth)

    HADOOP-6090. Updates gridmix script to use new mapreduce api output 
    format. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-732. Removed spurious log statements in the node
    blacklisting logic. (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-734. Fix a ConcurrentModificationException in unreserving
    unused reservations for a job when it completes.
    (Arun Murthy and Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-733. Fix a RuntimeException while unreserving trackers
    that are blacklisted for a job.
    (Arun Murthy and Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-677. Fix timeout in TestNodeRefresh. (Amar Kamat via 
    sharad)

    MAPREDUCE-153. Fix timeout in TestJobInProgressListener. (Amar 
    Kamat via sharad)

    MAPREDUCE-742. Fix output messages and java comments in the Pi related
    examples.  (szetszwo)

    MAPREDUCE-565. Fix partitioner to work with new API. (Owen O'Malley via
    cdouglas)
    
    MAPREDUCE-680. Fix so MRUnit can handle reuse of Writable objects.
    (Aaron Kimball via johan)

    MAPREDUCE-18. Puts some checks for cross checking whether a reduce
    task gets the correct shuffle data. (Ravi Gummadi via ddas)

    MAPREDUCE-771. Fix scheduling of setup and cleanup tasks to use
    free slots instead of tasks for scheduling. (yhemanth)

    MAPREDUCE-717. Fixes some corner case issues in speculative 
    execution heuristics. (Devaraj Das)

    MAPREDUCE-716. Make DBInputFormat work with Oracle. (Aaron Kimball
    via tomwhite)

    MAPREDUCE-735. Fixes a problem in the KeyFieldHelper to do with 
    the end index for some inputs (Amar Kamat via ddas)

    MAPREDUCE-682. Removes reservations on tasktrackers which are
    blacklisted. (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-743. Fixes a problem to do with progress reporting
    in the map phase. (Ravi Gummadi via ddas)

    MAPREDUCE-765. Eliminate the deprecated warnings introduced by H-5438.
    (He Yongqiang via szetszwo)

    MAPREDUCE-383. Fix a bug in Pipes combiner due to bytes count not 
    getting reset after the spill. (Christian Kunz via sharad)

    MAPREDUCE-809. Fix job-summary logs to correctly record status of FAILED
    and KILLED jobs.  (acmurthy)

    MAPREDUCE-792. Fix unchecked warnings in DBInputFormat.  (Aaron Kimball
    via szetszwo)

    MAPREDUCE-760. Fix a timing issue in TestNodeRefresh. (Amar Kamat via 
    sharad)

    MAPREDUCE-40. Keep memory management backwards compatible for job
    configuration parameters and limits. (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-587. Fixes a OOM issue in TestStreamingExitStatus.
    (Amar Kamat via ddas) 

    MAPREDUCE-408. Fixes an assertion problem in TestKillSubProcesses
    (Ravi Gummadi via ddas)
     
    MAPREDUCE-659. Fix gridmix2 compilation. (Giridharan Kesavan)

    MAPREDUCE-796. Fixes a ClassCastException in an exception log in
    MultiThreadedMapRunner. (Amar Kamat via ddas)

    MAPREDUCE-808. Fixes a serialization problem in TypedBytes.
    (Klaas Bosteels via ddas)

    MAPREDUCE-845. Fix a findbugs heap size problem in build.xml and add
    a new property findbugs.heap.size.  (Lee Tucker via szetszwo)

    MAPREDUCE-838. Fixes a problem in the way commit of task outputs
    happens. The bug was that even if commit failed, the task would
    be declared as successful. (Amareshwari Sriramadasu via ddas)

    MAPREDUCE-813. Updates Streaming and M/R tutorial documents.
    (Corinne Chandel via ddas)

    MAPREDUCE-805. Fixes some deadlocks in the JobTracker due to the fact
    the JobTracker lock hierarchy wasn't maintained in some JobInProgress
    method calls. (Amar Kamat via ddas)
    
    MAPREDUCE-799. Fixes so all of the MRUnit self-tests run.
    (Aaron Kimball via johan)    

    MAPREDUCE-848. Fixes a problem to do with TestCapacityScheduler
    failing (Amar Kamat via ddas)

    MAPREDUCE-840. DBInputFormat leaves open transaction.
    (Aaron Kimball via tomwhite)

    MAPREDUCE-859. Adds Avro and its dependencies required by Hadoop 
    common. (Ravi Gummadi via sharad)
    
    MAPREDUCE-867. Fix ivy conf to look for avro jar from maven repo.	
    (Giridharan Kesavan)

    MAPREDUCE-877. Added avro as a dependency to contrib ivy settings.
    (Tsz Wo (Nicholas) Sze via yhemanth)

    MAPREDUCE-852. In build.xml, remove the Main-Class, which is incorrectly
    set in tools, and rename the target "tools-jar" to "tools".  (szetszwo)

    MAPREDUCE-773. Sends progress reports for compressed gzip inputs in maps.
    Fixes a native direct buffer leak in LineRecordReader classes.
    (Hong Tang and ddas)

    MAPREDUCE-832. Reduce number of warning messages printed when
    deprecated memory variables are used. (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-745. Fixes a testcase problem to do with generation of JobTracker
    IDs. (Amar Kamat via ddas)

    MAPREDUCE-834. Enables memory management on tasktrackers when old
    memory management parameters are used in configuration.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-818. Fixes Counters#getGroup API. (Amareshwari Sriramadasu 
    via sharad)

    MAPREDUCE-807. Handles the AccessControlException during the deletion of
    mapred.system.dir in the JobTracker. The JobTracker will bail out if it
    encounters such an exception. (Amar Kamat via ddas)

    MAPREDUCE-430. Fix a bug related to task getting stuck in case of 
    OOM error. (Amar Kamat via ddas)

    MAPREDUCE-871. Fix ownership of Job/Task local files to have correct 
    group ownership according to the egid of the tasktracker.
    (Vinod Kumar Vavilapalli via yhemanth) 

    MAPREDUCE-911. Fix a bug in TestTaskFail related to speculative 
    execution. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-687. Fix an assertion in TestMiniMRMapRedDebugScript.
    (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-924. Fixes the TestPipes testcase to use Tool.
    (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-903. Add Avro jar to eclipse classpath.
    (Philip Zeyliger via tomwhite)

    MAPREDUCE-943. Removes a testcase in TestNodeRefresh that doesn't make 
    sense in the new Job recovery model. (Amar Kamat via ddas)

    MAPREDUCE-764. TypedBytesInput's readRaw() does not preserve custom type
    codes. (Klaas Bosteels via tomwhite)

    HADOOP-6243. Fixes a NullPointerException in handling deprecated keys.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-968. NPE in distcp encountered when placing _logs directory on
    S3FileSystem. (Aaron Kimball via tomwhite)
 
    MAPREDUCE-826. harchive doesn't use ToolRunner / harchive returns 0 even
    if the job fails with exception (koji Noguchi via mahadev)

    MAPREDUCE-839. unit test TestMiniMRChildTask fails on mac os-x (hong tang
    via mahadev)

    MAPREDUCE-112. Add counters for reduce input, output records to the new API.
    (Jothi Padmanabhan via cdouglas)

    MAPREDUCE-648. Fix two distcp bugs: (1) it should not launch a job if all
    src paths are directories, and (2) it does not skip copying when updating
    a single file.  (Ravi Gummadi via szetszwo)

    MAPREDUCE-946. Fix a regression in LineRecordReader where the
    maxBytesToConsume parameter is not set correctly. (cdouglas)

    MAPREDUCE-977. Missing jackson jars from Eclipse template. (tomwhite)

    MAPREDUCE-988. Fix a packaging issue in the contrib modules. (Hong Tang via
    cdouglas)

    MAPREDUCE-971. distcp does not always remove distcp.tmp.dir. (Aaron Kimball
    via tomwhite)

    MAPREDUCE-995. Fix a bug in JobHistory where tasks completing after the job
    is closed cause a NPE. (Jothi Padmanabhan via cdouglas)

    MAPREDUCE-953. Fix QueueManager to dump queue configuration in JSON format.
    (V.V. Chaitanya Krishna via yhemanth)

    MAPREDUCE-645. Prevent distcp from running a job when the destination is a
    file, but the source is not. (Ravi Gummadi via cdouglas)

    MAPREDUCE-1002. Flushed writer in JobQueueClient so queue information is
    printed correctly. (V.V. Chaitanya Krishna via yhemanth)

    MAPREDUCE-1003. Fix compilation problem in eclipse plugin when
    eclipse.home is set. (Ravi Gummadi via yhemanth)

    MAPREDUCE-941. Vaidya script fails on Solaris. (Chad Metcalf
    via tomwhite)

    MAPREDUCE-912. Add and standardize Apache license headers. (Chad Metcalf
    via cdouglas)

    MAPREDUCE-1022. Fix compilation of vertica testcases. (Vinod Kumar 
    Vavilapalli via acmurthy)

    MAPREDUCE-1000. Handle corrupt history files in JobHistory.initDone().
    (Jothi Padmanabhan via sharad)

    MAPREDUCE-1028. Fixed number of slots occupied by cleanup tasks to one
    irrespective of slot size for the job.
    (Ravi Gummadi via yhemanth)

    MAPREDUCE-964. Fixed start and finish times of TaskStatus to be
    consistent, thereby fixing inconsistencies in metering tasks.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-1076. Deprecate ClusterStatus and add javadoc in ClusterMetrics.
    (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-979. Fixed JobConf APIs related to memory parameters to return
    values of new configuration variables when deprecated variables are
    disabled. (Sreekanth Ramakrishnan via yhemanth)
   
    MAPREDUCE-1030. Modified scheduling algorithm to return a map and reduce
    task per heartbeat in the capacity scheduler.
    (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-1071. Use DataInputStream rather than FSDataInputStream in the
    JobHistory EventReader. (Hong Tang via cdouglas)

    MAPREDUCE-986. Fix Rumen to work with truncated task lines. (Dick King via
    cdouglas)

    MAPREDUCE-1029. Fix failing TestCopyFiles by restoring the unzipping of
    HDFS webapps from the hdfs jar. (Aaron Kimball and Jothi Padmanabhan via
    cdouglas)

    MAPREDUCE-769. Make findbugs and javac warnings to zero.
    (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-1104. Initialize RecoveryManager in JobTracker cstr called by
    Mumak. (Hong Tang via cdouglas)

    MAPREDUCE-1061. Add unit test validating byte specifications for gridmix
    jobs. (cdouglas)

    MAPREDUCE-1077. Fix Rumen so that truncated tasks do not mark the job as
    successful. (Dick King via cdouglas)

    MAPREDUCE-1041. Make TaskInProgress::taskStatuses map package-private.
    (Jothi Padmanabhan via cdouglas)

    MAPREDUCE-1070. Prevent a deadlock in the fair scheduler servlet.
    (Todd Lipcon via cdouglas)

    MAPREDUCE-1086. Setup Hadoop logging environment for tasks to point to
    task related parameters. (Ravi Gummadi via yhemanth)

    MAPREDUCE-1105. Remove max limit configuration in capacity scheduler in
    favor of max capacity percentage thus allowing the limit to go over
    queue capacity. (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-1016.  Make the job history log format JSON.  (cutting)

    MAPREDUCE-1038. Weave Mumak aspects only if related files have changed.
    (Aaron Kimball via cdouglas)

    MAPREDUCE-1163. Remove unused, hard-coded paths from libhdfs. (Allen
    Wittenauer via cdouglas)

    MAPREDUCE-962. Fix a NullPointerException while killing task process 
    trees. (Ravi Gummadi via yhemanth)

    MAPREDUCE-1177. Correct setup/cleanup inversion in
    JobTracker::getTaskReports. (Vinod Kumar Vavilapalli via cdouglas)

    MAPREDUCE-1178. Fix ClassCastException in MultipleInputs by adding 
    a DelegatingRecordReader. (Amareshwari Sriramadasu and Jay Booth 
    via sharad)

    MAPREDUCE-1068. Fix streaming job to show proper message if file is 
    is not present. (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-1147. Add map output counters to new API. (Amar Kamat via
    cdouglas)

    MAPREDUCE-915. The debug scripts are run as the job user. (ddas)

    MAPREDUCE-1007. Fix NPE in CapacityTaskScheduler.getJobs(). 
    (V.V.Chaitanya Krishna via sharad)

    MAPREDUCE-28. Refactor TestQueueManager and fix default ACLs.
    (V.V.Chaitanya Krishna and Rahul K Singh via sharad)

    MAPREDUCE-1182. Fix overflow in reduce causing allocations to exceed the
    configured threshold. (cdouglas)

    MAPREDUCE-1239. Fix contrib components build dependencies. 
    (Giridharan Kesavan and omalley) 

    MAPREDUCE-787. Fix JobSubmitter to honor user given symlink path.
    (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-1249. Update config default value for socket read timeout to
    match code default. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1161. Remove ineffective synchronization in NotificationTestCase.
    (Owen O'Malley via cdouglas)

    MAPREDUCE-1244. Fix eclipse-plugin's build dependencies. (gkesavan)

    MAPREDUCE-1075. Fix JobTracker to not throw an NPE for a non-existent
    queue. (V.V.Chaitanya Krishna via yhemanth)

    MAPREDUCE-754. Fix NPE in expiry thread when a TT is lost. (Amar Kamat 
    via sharad)

    MAPREDUCE-1074. Document Reducer mark/reset functionality. (Jothi
    Padmanabhan via cdouglas)

    MAPREDUCE-1267. Fix typo in mapred-default.xml. (Todd Lipcon via cdouglas)

    MAPREDUCE-952. Remove inadvertently reintroduced Task.Counter enum. (Jothi
    Padmanabhan via cdouglas)

    MAPREDUCE-1230. Fix handling of null records in VerticaInputFormat. (Omer
    Trajman via cdouglas)

    MAPREDUCE-1171. Allow shuffle retries and read-error reporting to be
    configurable. (Amareshwari Sriramadasu via acmurthy)

    MAPREDUCE-879. Fix broken unit test TestTaskTrackerLocalization on MacOS.
    (Sreekanth Ramakrishnan via yhemanth)

    MAPREDUCE-1124. Fix imprecise byte counts in Gridmix. (cdouglas)

    MAPREDUCE-1222. Add an option to exclude numeric IP addresses in topologies
    processed by Mumak. (Hong Tang via cdouglas)

    MAPREDUCE-1284. Fix fts_open() call in task-controller that was failing
    LinuxTaskController unit tests. (Ravi Gummadi via yhemanth)

    MAPREDUCE-1143. Fix running task counters to be updated correctly
    when speculative attempts are running for a TIP.
    (Rahul Kumar Singh via yhemanth)

    MAPREDUCE-1241. Use a default queue configuration in JobTracker when
    mapred-queues.xml is unavailable. (Todd Lipcon via cdouglas)

    MAPREDUCE-1301. Fix set up of permission checking script used in 
    localization tests. (Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1286. Remove quoting from client opts in TaskRunner. (Yuri
    Pradkin via cdouglas)

    MAPREDUCE-1059. Use distcp.bytes.per.map when adding sync markers in
    distcp. (Aaron Kimball via cdouglas)

    MAPREDUCE-1009. Update forrest documentation describing hierarchical
    queues. (Vinod Kumar Vavilapalli via yhemanth)

    MAPREDUCE-1342. Fixed deadlock in global blacklisting of tasktrackers.
    (Amareshwari Sriramadasu via acmurthy)

    MAPREDUCE-1316. Fixes a memory leak of TaskInProgress instances in
    the jobtracker. (Amar Kamat via yhemanth)

    MAPREDUCE-1359. TypedBytes TestIO doesn't mkdir its test dir first.
    (Anatoli Fomenko via cos)

    MAPREDUCE-1314. Correct errant mapreduce.x.mapreduce.x replacements from
    bulk change. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1365. Restore accidentally renamed test in
    TestTaskTrackerBloacklisting. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1406. Fix spelling of JobContext.MAP_COMBINE_MIN_SPILLS.
    (cdouglas)

    MAPREDUCE-1369. JUnit tests should never depend on anything in conf
    (Anatoli Fomenko via cos)

    MAPREDUCE-1412. Fix timer granularity issue causing failures in
    TestTaskTrackerBlacklisting. (cdouglas)

    MAPREDUCE-1448. Respect --config option in Mumak script. (Hong Tang via
    cdouglas)

    MAPREDUCE-1251. c++ utils doesn't compile. (Eli Collins via tomwhite)

    MAPREDUCE-1522. FileInputFormat may use the default FileSystem for the
    input path. (Tsz Wo (Nicholas), SZE via cdouglas)

    MAPREDUCE-1407. Update javadoc in mapreduce.{Mapper,Reducer} to match
    actual usage. (Benoit Sigoure via cdouglas)

    MAPREDUCE-1258. Fix fair scheduler event log not logging job info.
    (matei)

    MAPREDUCE-1089. Fix NPE in fair scheduler preemption when tasks are
    scheduled but not running. (Todd Lipcon via matei)

    MAPREDUCE-1014. Fix the libraries for common and hdfs. (omalley)

    MAPREDUCE-1111. JT Jetty UI not working if we run mumak.sh 
    off packaged distribution directory. (hong tang via mahadev)

    MAPREDUCE-1133. Eclipse .classpath template has outdated jar files and is
    missing some new ones. (cos)

    MAPREDUCE-1098. Fixed the distributed-cache to not do i/o while holding a
    global lock. (Amareshwari Sriramadasu via acmurthy)

    MAPREDUCE-1158. Fix JT running maps and running reduces metrics.
    (sharad)

    MAPREDUCE-1160. Reduce verbosity of log lines in some Map/Reduce classes
    to avoid filling up jobtracker logs on a busy cluster.
    (Ravi Gummadi and Hong Tang via yhemanth)

    MAPREDUCE-1153. Fix tasktracker metrics when trackers are decommissioned.
    (sharad)

    MAPREDUCE-1128. Fix MRUnit to prohibit iterating over values twice. (Aaron
    Kimball via cdouglas)

    MAPREDUCE-665. Move libhdfs to HDFS subproject. (Eli Collins via dhruba)

    MAPREDUCE-1196. Fix FileOutputCommitter to use the deprecated cleanupJob
    api correctly. (acmurthy)
   
    MAPREDUCE-1244. Fix eclipse-plugin's build dependencies. (gkesavan)

    MAPREDUCE-1140. Fix DistributedCache to not decrement reference counts for
    unreferenced files in error conditions.
    (Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1245. Fix TestFairScheduler failures by instantiating lightweight
    Jobtracker. (sharad)

    MAPREDUCE-1260. Update Eclipse configuration to match changes to Ivy
    configuration. (Edwin Chan via cos)

    MAPREDUCE-1152. Distinguish between failed and killed tasks in
    JobTrackerInstrumentation. (Sharad Agarwal via cdouglas)

    MAPREDUCE-1285. In DistCp.deleteNonexisting(..), get class from the
    parameter instead of using FileStatus.class.  (Peter Romianowski via
    szetszwo)

    MAPREDUCE-1294. Build fails to pull latest hadoop-core-* artifacts (cos)

    MAPREDUCE-1213. TaskTrackers restart is faster because it deletes
    distributed cache directory asynchronously. (Zheng Shao via dhruba)

    MAPREDUCE-1265. The task attempt error log prints the name of the 
    tasktracker machine. (Scott Chen via dhruba)

    MAPREDUCE-1201. ProcfsBasedProcessTree collects CPU usage information.
    (Scott Chen via dhruba)

    MAPREDUCE-1326. fi tests don't use fi-site.xml (cos)

    MAPREDUCE-1165. Replace non-portable function name with C99 equivalent.
    (Allen Wittenauer via cdouglas)

    MAPREDUCE-1331. Fixes a typo in a testcase (Devaraj Das)

    MAPREDUCE-1293. AutoInputFormat doesn't work with non-default FileSystems.
    (Andrew Hitchcock via tomwhite)

    MAPREDUCE-1131. Using profilers other than hprof can cause JobClient to
    report job failure. (Aaron Kimball via tomwhite)

    MAPREDUCE-1155. Streaming tests swallow exceptions.
    (Todd Lipcon via tomwhite)

    MAPREDUCE-1212. Mapreduce contrib project ivy dependencies are not included
    in binary target. (Aaron Kimball via tomwhite)

    MAPREDUCE-1388. Move the HDFS RAID package from HDFS to MAPREDUCE.
    (Eli Collins via dhruba)

    MAPREDUCE-1322. Defines default value for staging directory to be user
    based fixing a failing streaming test.
    (Devaraj Das and Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-899. Modified LinuxTaskController to check that task-controller
    has right permissions and ownership before performing any actions.
    (Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1443. DBInputFormat can leak connections.
    (Aaron Kimball via tomwhite)

    MAPREDUCE-1457. Fixes JobTracker to get the FileSystem object within 
    getStagingAreaDir within a privileged block. Fixes Child.java to use the
    appropriate UGIs while getting the TaskUmbilicalProtocol proxy and 
    while executing the task. (Jakob Homan via ddas)

    MAPREDUCE-1399. The archive command shows a null error message (nicholas
    via mahadev)

    MAPREDUCE-1305. Improve efficiency of distcp -delete. (Peter Romianowski
    via cdouglas)

    MAPREDUCE-1474. Update forrest documentation for Hadoop Archives. (Mahadev
    Konar via cdouglas)

    MAPREDUCE-1400. Use tr rather than sed to effect literal substitution in
    the build script. (Allen Wittenauer via cdouglas)

    MAPREDUCE-1358. Avoid false positives in OutputLogFilter. (Todd Lipcon via
    cdouglas)

    MAPREDUCE-1490. Fix a NullPointerException that could occur during 
    instantiation and initialization of the DistributedRaidFileSystem. 
    (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1476. Fix the M/R framework to not call commit for special
    tasks like job setup/cleanup and task cleanup.
    (Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1398. Fix TaskLauncher to stop waiting for slots on a TIP that
    is killed / failed.
    (Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1491. The parity files created by the RAID are combined
    using Hadoop Archive Files (HAR).  (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1378. URL encode link in jobhistory.jsp to avoid errors caused by
    unescaped characters. (E. Sammer via cdouglas)

    MAPREDUCE-1519. RaidNode fails to create new parity file 
    if an older version already exists. (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1537. Fixes a compilation problem in a testcase after commit
    HDFS-984. (Jitendra Nath Pandey via ddas)

    MAPREDUCE-1537. The patch makes the job client call the getDelegationToken
    only when security is enabled. (Jitendra Nath Pandey via ddas)

    MAPREDUCE-1510. RAID should regenerate parity files if they get deleted.
    (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1421. Fix the LinuxTaskController tests failing on trunk after
    the commit of MAPREDUCE-1385. (Amareshwari Sriramadasu via vinodkv)

    MAPREDUCE-1520. Fix TestMiniMRLocalFS failure caused by regression in
    getting user working dir. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1512. RAID uses HarFileSystem directly instead of
    FileSystem.get (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1435. Fix symlink handling in task work directory when
    cleaning up, essentially to avoid following links.
    (Ravi Gummadi via yhemanth)

    MAPREDUCE-1518. RaidNode does not run the deletion check on the
    directory that stores the parity files.  (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1573. TestStreamingAsDifferentUser fails if run as tt_user.
    (Ravi Gummadi via vinodkv)

    MAPREDUCE-927. Cleanup of task-logs should happen in TaskTracker instead
    of the Child. (Amareshwari Sriramadasu via vinodkv)

    MAPREDUCE-1578. Decouple HadoopArchives vesrion from HarFileSystem version.
    (Rodrigo Schmidt via szetszwo)

    MAPREDUCE-1422. Fix cleanup of localized job directory to work if files
    with non-deletable permissions are created within it.
    (Amar Kamat via yhemanth)

    MAPREDUCE-1306. Randomize the arrival of heartbeat responses in Mumak.
    (Tamas Sarlos via cdouglas)

    MAPREDUCE-1579. archive: check and possibly replace the space charater
    in source paths.  (szetszwo)

    MAPREDUCE-1536. DataDrivenDBInputFormat does not split date columns correctly.
    (Aaron Kimball via enis)

    MAPREDUCE-890. After HADOOP-4491, the user who started mapred system is 
    not able to run job. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1615. Fix compilation of TestSubmitJob. (cdouglas)

    MAPREDUCE-1508. Protect against NPE in TestMultipleLevelCaching. (Aaron
    Kimball via cdouglas)

    MAPREDUCE-1497. Suppress spurious findbugs warning about IndexCache
    synchronization. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1420. Fix TestTTResourceReporting failure. (Scott Chen via
    cdouglas)

    MAPREDUCE-1480. Correctly initialize child RecordReaders in
    CombineFileInputFormat. (Aaron Kimball via cdouglas)

    MAPREDUCE-1348. Fix block forensics packaging. (Tom White via cdouglas)

    MAPREDUCE-1628. HarFileSystem shows incorrect replication numbers and
    permissions.  (szetszwo via mahadev)

    MAPREDUCE-1602. Fix the error message for the case that src does not
    exist.  (szetszwo)

    MAPREDUCE-1585. Create Hadoop Archives version 2 with filenames
    URL-encoded (rodrigo via mahadev)

    MAPREDUCE-1523. Sometimes rumen trace generator fails to extract the job
    finish time. (dick king via mahadev)

    MAPREDUCE-1635. ResourceEstimator does not work after MAPREDUCE-842.
    (Amareshwari Sriramadasu via vinodkv)

    MAPREDUCE-889. binary communication formats added to Streaming by
    HADOOP-1722 should be documented. (Klaas Bosteels via tomwhite)

    MAPREDUCE-1031. ant tar target doens't seem to compile tests in contrib
    projects. (Aaron Kimball via tomwhite)

    MAPREDUCE-1692. Removed unused testcase TestStreamedMerge.
    (Sreekanth Ramakrishnan and Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1062. Fix ReliabilityTest to work with retired jobs. (Sreekanth
    Ramakrishnan via cdouglas)

    MAPREDUCE-1409. IOExceptions thrown from FIleOutputCommitter::abortTask
    should cause the task to fail. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1695. Include capacity scheduler in findbugs and javadoc-dev
    targets and also fix existing warnings. (Hong Tang via yhemanth)

    MAPREDUCE-1494. Ensure TestJobDirCleanup verifies the correct paths.
    (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1622. Include missing slf4j dependencies. (cdouglas)

    MAPREDUCE-1515. Accept java5.home from build.properties, not only from the
    command line when building forrest docs. (Al Thompson via cdouglas)

    MAPREDUCE-1618. Add missing javadoc to JobStatus::*JobAcls. (Amareshwari
    Sriramadasu via cdouglas)

    MAPREDUCE-1219. Remove job level metrics from jobtracker metrics to ease 
    undue load on jobtracker. (Sreekanth Ramakrishnan via sharad)

    MAPREDUCE-1604. Add Forrest documentation for Job ACLs.
    (Amareshwari Sriramadasu via yhemanth)

    MAPREDUCE-1705. Archiving and Purging of HDFS parity files should 
    handle globbed policies accurately. (Rodrigo Schmidt via dhruba)

    MAPREDUCE-1612. job conf file is not accessible from job history web page.
    (Ravi Gummadi and Sreekanth Ramakrishnan via vinodkv)

    MAPREDUCE-1397. NullPointerException observed during task failures.
    (Amareshwari Sriramadasu via vinodkv)

    MAPREDUCE-1728. Oracle timezone strings do not match Java.
    (Aaron Kimball via tomwhite)

    MAPREDUCE-1609. TaskTracker.localizeJob should not set permissions on 
    job log directory recursively. (Amareshwari Sriramadasu via vinodkv)

    MAPREDUCE-1657. After task logs directory is deleted, tasklog servlet 
    displays wrong error message about job ACLs. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1727. TestJobACLs fails after HADOOP-6686. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1611. Refresh nodes and refresh queues doesnt work with service
    authorization enabled. (Amar Kamat via vinodkv)

    MAPREDUCE-1276. Correct flaws in the shuffle related to connection setup
    and failure attribution. (Amareshwari Sriramadasu via cdouglas)

    MAPREDUCE-1372. ConcurrentModificationException in JobInProgress.
    (Dick King and Amareshwari Sriramadasu via tomwhite)

    MAPREDUCE-118. Fix Job.getJobID(). (Amareshwari Sriramadasu via sharad)

    MAPREDUCE-913. TaskRunner crashes with NPE resulting in held up slots,
    UNINITIALIZED tasks and hung TaskTracker. (Amareshwari Sriramadasu and
    Sreekanth Ramakrishnan via vinodkv)

    MAPREDUCE-1725.  Fix MapReduce API incompatibilities between 0.20 and 0.21.
    (tomwhite)

    MAPREDUCE-1606. TestJobACLs may timeout as there are no slots for launching
    JOB_CLEANUP task. (Ravi Gummadi via vinodkv)

    MAPREDUCE-1765. Correct streaming documentation for StreamXmlRecordReader.
    (Corinne Chandel via amareshwari)

    MAPREDUCE-1880. Fix BigDecimal.divide(..) in the pi example.  (szetszwo)

    MAPREDUCE-1885. Revert FileSystem create method that takes CreateFlags
    (MapReduce part of HADOOP-6826). (Ravi Gummadi via tomwhite)

    MAPREDUCE-1870. Harmonize MapReduce JAR library versions with Common and
    HDFS. (tomwhite)

    MAPREDUCE-1791. Remote cluster control functionality needs JavaDocs
    improvement (Konstantin Boudnik)

    MAPREDUCE-1942. 'compile-fault-inject' should never be called directly.
    (Konstantin Boudnik)

    MAPREDUCE-1876. Fixes TaskAttemptStartedEvent to correctly log event type
    for all task types. (Amar Kamat via amareshwari)

    MAPREDUCE-1926. MapReduce distribution is missing build-utils.xml.
    (tomwhite)

    MAPREDUCE-2012. Some contrib tests fail in branch 0.21 and trunk.
    (Amareshwari Sriramadasu via tomwhite)

    MAPREDUCE-1980. Fixes TaskAttemptUnsuccessfulCompletionEvent and
    TaskAttemptFinishedEvent to correctly log event type for all task types.
    (Amar Kamat via amareshwari)

    MAPREDUCE-1856. Extract a subset of tests for smoke (DOA) validation (cos)