Add CHANGES, RELEASENOTES, and jdiff for 3.0.0-alpha2 release.

hadoop-common-project/hadoop-common/src/site/markdown/release/3.0.0-alpha2/CHANGES.3.0.0-alpha2.md

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+# "Apache Hadoop" Changelog
+
+## Release 3.0.0-alpha2 - 2017-01-20
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-13361](https://issues.apache.org/jira/browse/HADOOP-13361) | Modify hadoop\_verify\_user to be consistent with hadoop\_subcommand\_opts (ie more granularity) |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HDFS-6962](https://issues.apache.org/jira/browse/HDFS-6962) | ACL inheritance conflicts with umaskmode |  Critical | security | LINTE | John Zhuge |
+| [HADOOP-13341](https://issues.apache.org/jira/browse/HADOOP-13341) | Deprecate HADOOP\_SERVERNAME\_OPTS; replace with (command)\_(subcommand)\_OPTS |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HADOOP-13588](https://issues.apache.org/jira/browse/HADOOP-13588) | ConfServlet should respect Accept request header |  Major | conf | Weiwei Yang | Weiwei Yang |
+| [HDFS-10636](https://issues.apache.org/jira/browse/HDFS-10636) | Modify ReplicaInfo to remove the assumption that replica metadata and data are stored in java.io.File. |  Major | datanode, fs | Virajith Jalaparti | Virajith Jalaparti |
+| [HADOOP-13218](https://issues.apache.org/jira/browse/HADOOP-13218) | Migrate other Hadoop side tests to prepare for removing WritableRPCEngine |  Major | test | Kai Zheng | Wei Zhou |
+| [HDFS-10877](https://issues.apache.org/jira/browse/HDFS-10877) | Make RemoteEditLogManifest.committedTxnId optional in Protocol Buffers |  Major | qjm | Sean Mackrory | Sean Mackrory |
+| [HADOOP-13681](https://issues.apache.org/jira/browse/HADOOP-13681) | Reduce Kafka dependencies in hadoop-kafka module |  Major | metrics | Grant Henke | Grant Henke |
+| [HADOOP-13678](https://issues.apache.org/jira/browse/HADOOP-13678) | Update jackson from 1.9.13 to 2.x in hadoop-tools |  Major | tools | Akira Ajisaka | Akira Ajisaka |
+| [MAPREDUCE-6776](https://issues.apache.org/jira/browse/MAPREDUCE-6776) | yarn.app.mapreduce.client.job.max-retries should have a more useful default |  Major | client | Daniel Templeton | Miklos Szegedi |
+| [HADOOP-13699](https://issues.apache.org/jira/browse/HADOOP-13699) | Configuration does not substitute multiple references to the same var |  Critical | conf | Andrew Wang | Andrew Wang |
+| [HDFS-10637](https://issues.apache.org/jira/browse/HDFS-10637) | Modifications to remove the assumption that FsVolumes are backed by java.io.File. |  Major | datanode, fs | Virajith Jalaparti | Virajith Jalaparti |
+| [HDFS-10916](https://issues.apache.org/jira/browse/HDFS-10916) | Switch from "raw" to "system" xattr namespace for erasure coding policy |  Major | erasure-coding | Andrew Wang | Andrew Wang |
+| [YARN-4464](https://issues.apache.org/jira/browse/YARN-4464) | Lower the default max applications stored in the RM and store |  Blocker | resourcemanager | KWON BYUNGCHANG | Daniel Templeton |
+| [HADOOP-13721](https://issues.apache.org/jira/browse/HADOOP-13721) | Remove stale method ViewFileSystem#getTrashCanLocation |  Minor | viewfs | Manoj Govindassamy | Manoj Govindassamy |
+| [HDFS-10957](https://issues.apache.org/jira/browse/HDFS-10957) | Retire BKJM from trunk |  Major | ha | Vinayakumar B | Vinayakumar B |
+| [HADOOP-13560](https://issues.apache.org/jira/browse/HADOOP-13560) | S3ABlockOutputStream to support huge (many GB) file writes |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [MAPREDUCE-6791](https://issues.apache.org/jira/browse/MAPREDUCE-6791) | remove unnecessary dependency from hadoop-mapreduce-client-jobclient to hadoop-mapreduce-client-shuffle |  Minor | mrv2 | Haibo Chen | Haibo Chen |
+| [HADOOP-7352](https://issues.apache.org/jira/browse/HADOOP-7352) | FileSystem#listStatus should throw IOE upon access error |  Major | fs | Matt Foley | John Zhuge |
+| [HADOOP-13693](https://issues.apache.org/jira/browse/HADOOP-13693) | Remove the message about HTTP OPTIONS in SPNEGO initialization message from kms audit log |  Minor | kms | Xiao Chen | Xiao Chen |
+| [YARN-5388](https://issues.apache.org/jira/browse/YARN-5388) | Deprecate and remove DockerContainerExecutor |  Critical | nodemanager | Daniel Templeton | Daniel Templeton |
+| [YARN-3732](https://issues.apache.org/jira/browse/YARN-3732) | Change NodeHeartbeatResponse.java and RegisterNodeManagerResponse.java as abstract classes |  Minor | . | Devaraj K | Devaraj K |
+| [HDFS-11048](https://issues.apache.org/jira/browse/HDFS-11048) | Audit Log should escape control characters |  Major | . | Eric Badger | Eric Badger |
+| [HADOOP-13792](https://issues.apache.org/jira/browse/HADOOP-13792) | Stackoverflow for schemeless defaultFS with trailing slash |  Major | fs | Darius Murawski | John Zhuge |
+| [HDFS-10970](https://issues.apache.org/jira/browse/HDFS-10970) | Update jackson from 1.9.13 to 2.x in hadoop-hdfs |  Major | build | Akira Ajisaka | Akira Ajisaka |
+| [HDFS-11116](https://issues.apache.org/jira/browse/HDFS-11116) | Fix javac warnings caused by deprecation of APIs in TestViewFsDefaultValue |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [HADOOP-12718](https://issues.apache.org/jira/browse/HADOOP-12718) | Incorrect error message by fs -put local dir without permission |  Major | . | John Zhuge | John Zhuge |
+| [YARN-5825](https://issues.apache.org/jira/browse/YARN-5825) | ProportionalPreemptionalPolicy could use readLock over LeafQueue instead of synchronized block |  Major | capacity scheduler | Sunil G | Sunil G |
+| [HADOOP-12705](https://issues.apache.org/jira/browse/HADOOP-12705) | Upgrade Jackson 2.2.3 to 2.7.8 |  Major | build | Steve Loughran | Sean Mackrory |
+| [YARN-5713](https://issues.apache.org/jira/browse/YARN-5713) | Update jackson from 1.9.13 to 2.x in hadoop-yarn |  Major | build, timelineserver | Akira Ajisaka | Akira Ajisaka |
+| [HADOOP-13050](https://issues.apache.org/jira/browse/HADOOP-13050) | Upgrade to AWS SDK 1.11.45 |  Blocker | build, fs/s3 | Steve Loughran | Steve Loughran |
+| [HADOOP-13706](https://issues.apache.org/jira/browse/HADOOP-13706) | Update jackson from 1.9.13 to 2.x in hadoop-common-project |  Major | build | Akira Ajisaka | Akira Ajisaka |
+| [HADOOP-13812](https://issues.apache.org/jira/browse/HADOOP-13812) | Upgrade Tomcat to 6.0.48 |  Blocker | kms | John Zhuge | John Zhuge |
+| [HDFS-5517](https://issues.apache.org/jira/browse/HDFS-5517) | Lower the default maximum number of blocks per file |  Major | namenode | Aaron T. Myers | Aaron T. Myers |
+| [HADOOP-13842](https://issues.apache.org/jira/browse/HADOOP-13842) | Update jackson from 1.9.13 to 2.x in hadoop-maven-plugins |  Minor | build | Akira Ajisaka | Akira Ajisaka |
+| [MAPREDUCE-4683](https://issues.apache.org/jira/browse/MAPREDUCE-4683) | Create and distribute hadoop-mapreduce-client-core-tests.jar |  Critical | build | Arun C Murthy | Akira Ajisaka |
+| [HADOOP-13597](https://issues.apache.org/jira/browse/HADOOP-13597) | Switch KMS from Tomcat to Jetty |  Major | kms | John Zhuge | John Zhuge |
+| [YARN-6071](https://issues.apache.org/jira/browse/YARN-6071) | Fix incompatible API change on AM-RM protocol due to YARN-3866 (trunk only) |  Blocker | . | Junping Du | Wangda Tan |
+| [HADOOP-13964](https://issues.apache.org/jira/browse/HADOOP-13964) | Remove vestigal templates directories creation |  Major | build | Allen Wittenauer | Allen Wittenauer |
+
+
+### IMPORTANT ISSUES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-12756](https://issues.apache.org/jira/browse/HADOOP-12756) | Incorporate Aliyun OSS file system implementation |  Major | fs | shimingfei | shimingfei |
+| [MAPREDUCE-6774](https://issues.apache.org/jira/browse/MAPREDUCE-6774) | Add support for HDFS erasure code policy to TestDFSIO |  Major | . | SammiChen | SammiChen |
+| [HDFS-10918](https://issues.apache.org/jira/browse/HDFS-10918) | Add a tool to get FileEncryptionInfo from CLI |  Major | encryption | Xiao Chen | Xiao Chen |
+| [HADOOP-13584](https://issues.apache.org/jira/browse/HADOOP-13584) | hadoop-aliyun: merge HADOOP-12756 branch back |  Major | fs | shimingfei | Genmao Yu |
+| [HDFS-9820](https://issues.apache.org/jira/browse/HDFS-9820) | Improve distcp to support efficient restore to an earlier snapshot |  Major | distcp | Yongjun Zhang | Yongjun Zhang |
+| [HADOOP-13716](https://issues.apache.org/jira/browse/HADOOP-13716) | Add LambdaTestUtils class for tests; fix eventual consistency problem in contract test setup |  Major | test | Steve Loughran | Steve Loughran |
+| [YARN-4597](https://issues.apache.org/jira/browse/YARN-4597) | Introduce ContainerScheduler and a SCHEDULED state to NodeManager container lifecycle |  Major | nodemanager | Chris Douglas | Arun Suresh |
+| [HADOOP-13852](https://issues.apache.org/jira/browse/HADOOP-13852) | hadoop build to allow hadoop version property to be explicitly set |  Minor | build | Steve Loughran | Steve Loughran |
+| [HADOOP-13578](https://issues.apache.org/jira/browse/HADOOP-13578) | Add Codec for ZStandard Compression |  Major | . | churro morales | churro morales |
+| [HADOOP-13933](https://issues.apache.org/jira/browse/HADOOP-13933) | Add haadmin -getAllServiceState option to get the HA state of all the NameNodes/ResourceManagers |  Major | tools | Surendra Singh Lilhore | Surendra Singh Lilhore |
+| [HADOOP-13673](https://issues.apache.org/jira/browse/HADOOP-13673) | Update scripts to be smarter when running with privilege |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-10814](https://issues.apache.org/jira/browse/HDFS-10814) | Add assertion for getNumEncryptionZones when no EZ is created |  Minor | test | Vinitha Reddy Gankidi | Vinitha Reddy Gankidi |
+| [HDFS-10784](https://issues.apache.org/jira/browse/HDFS-10784) | Implement WebHdfsFileSystem#listStatusIterator |  Major | webhdfs | Andrew Wang | Andrew Wang |
+| [HDFS-10817](https://issues.apache.org/jira/browse/HDFS-10817) | Add Logging for Long-held NN Read Locks |  Major | logging, namenode | Erik Krogen | Erik Krogen |
+| [HADOOP-13465](https://issues.apache.org/jira/browse/HADOOP-13465) | Design Server.Call to be extensible for unified call queue |  Major | ipc | Daryn Sharp | Daryn Sharp |
+| [HDFS-10822](https://issues.apache.org/jira/browse/HDFS-10822) | Log DataNodes in the write pipeline |  Trivial | hdfs-client | John Zhuge | John Zhuge |
+| [HDFS-10833](https://issues.apache.org/jira/browse/HDFS-10833) | Fix JSON errors in WebHDFS.md examples |  Trivial | documentation | Andrew Wang | Andrew Wang |
+| [YARN-5616](https://issues.apache.org/jira/browse/YARN-5616) | Clean up WeightAdjuster |  Major | fairscheduler | Yufei Gu | Yufei Gu |
+| [HDFS-10778](https://issues.apache.org/jira/browse/HDFS-10778) | Add -format option to make the output of FileDistribution processor human-readable in OfflineImageViewer |  Major | tools | Yiqun Lin | Yiqun Lin |
+| [HDFS-10847](https://issues.apache.org/jira/browse/HDFS-10847) | Complete the document for FileDistribution processor in OfflineImageViewer |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13519](https://issues.apache.org/jira/browse/HADOOP-13519) | Make Path serializable |  Minor | io | Steve Loughran | Steve Loughran |
+| [HDFS-10742](https://issues.apache.org/jira/browse/HDFS-10742) | Measure lock time in FsDatasetImpl |  Major | datanode | Chen Liang | Chen Liang |
+| [HDFS-10831](https://issues.apache.org/jira/browse/HDFS-10831) | Add log when URLConnectionFactory.openConnection failed |  Minor | webhdfs | yunjiong zhao | yunjiong zhao |
+| [HDFS-10855](https://issues.apache.org/jira/browse/HDFS-10855) | Fix typos in HDFS documents |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HDFS-10837](https://issues.apache.org/jira/browse/HDFS-10837) | Standardize serializiation of WebHDFS DirectoryListing |  Major | webhdfs | Andrew Wang | Andrew Wang |
+| [HADOOP-13598](https://issues.apache.org/jira/browse/HADOOP-13598) | Add eol=lf for unix format files in .gitattributes |  Major | . | Akira Ajisaka | Yiqun Lin |
+| [HADOOP-13606](https://issues.apache.org/jira/browse/HADOOP-13606) | swift FS to add a service load metadata file |  Major | fs/swift | Steve Loughran | Steve Loughran |
+| [HADOOP-13411](https://issues.apache.org/jira/browse/HADOOP-13411) | Checkstyle suppression by annotation or comment |  Minor | . | John Zhuge | John Zhuge |
+| [HADOOP-13412](https://issues.apache.org/jira/browse/HADOOP-13412) | Move dev-support/checkstyle/suppressions.xml to hadoop-build-tools |  Trivial | . | John Zhuge | John Zhuge |
+| [HADOOP-13580](https://issues.apache.org/jira/browse/HADOOP-13580) | If user is unauthorized, log "unauthorized" instead of "Invalid signed text:" |  Minor | security | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HDFS-10823](https://issues.apache.org/jira/browse/HDFS-10823) | Implement HttpFSFileSystem#listStatusIterator |  Major | httpfs | Andrew Wang | Andrew Wang |
+| [HDFS-10489](https://issues.apache.org/jira/browse/HDFS-10489) | Deprecate dfs.encryption.key.provider.uri for HDFS encryption zones |  Minor | . | Xiao Chen | Xiao Chen |
+| [HDFS-10868](https://issues.apache.org/jira/browse/HDFS-10868) | Remove stray references to DFS\_HDFS\_BLOCKS\_METADATA\_ENABLED |  Trivial | . | Andrew Wang | Andrew Wang |
+| [YARN-5540](https://issues.apache.org/jira/browse/YARN-5540) | scheduler spends too much time looking at empty priorities |  Major | capacity scheduler, fairscheduler, resourcemanager | Nathan Roberts | Jason Lowe |
+| [HADOOP-13169](https://issues.apache.org/jira/browse/HADOOP-13169) | Randomize file list in SimpleCopyListing |  Minor | tools/distcp | Rajesh Balamohan | Rajesh Balamohan |
+| [HDFS-10875](https://issues.apache.org/jira/browse/HDFS-10875) | Optimize du -x to cache intermediate result |  Major | snapshots | Xiao Chen | Xiao Chen |
+| [YARN-4591](https://issues.apache.org/jira/browse/YARN-4591) | YARN Web UIs should provide a robots.txt |  Trivial | . | Lars Francke | Sidharta Seethana |
+| [MAPREDUCE-6632](https://issues.apache.org/jira/browse/MAPREDUCE-6632) | Master.getMasterAddress() should be updated to use YARN-4629 |  Minor | applicationmaster | Daniel Templeton | Daniel Templeton |
+| [YARN-5622](https://issues.apache.org/jira/browse/YARN-5622) | TestYarnCLI.testGetContainers fails due to mismatched date formats |  Minor | . | Eric Badger | Eric Badger |
+| [HDFS-10876](https://issues.apache.org/jira/browse/HDFS-10876) | Dispatcher#dispatch should log IOException stacktrace |  Trivial | balancer & mover | Wei-Chiu Chuang | Manoj Govindassamy |
+| [YARN-3692](https://issues.apache.org/jira/browse/YARN-3692) | Allow REST API to set a user generated message when killing an application |  Major | . | Rajat Jain | Rohith Sharma K S |
+| [HDFS-10869](https://issues.apache.org/jira/browse/HDFS-10869) | Remove the unused method InodeId#checkId() |  Major | namenode | Jagadesh Kiran N | Jagadesh Kiran N |
+| [YARN-3877](https://issues.apache.org/jira/browse/YARN-3877) | YarnClientImpl.submitApplication swallows exceptions |  Minor | client | Steve Loughran | Varun Saxena |
+| [HADOOP-13658](https://issues.apache.org/jira/browse/HADOOP-13658) | Replace config key literal strings with config key names I: hadoop common |  Minor | conf | Chen Liang | Chen Liang |
+| [YARN-5400](https://issues.apache.org/jira/browse/YARN-5400) | Light cleanup in ZKRMStateStore |  Trivial | resourcemanager | Daniel Templeton | Daniel Templeton |
+| [MAPREDUCE-6718](https://issues.apache.org/jira/browse/MAPREDUCE-6718) | add progress log to JHS during startup |  Minor | jobhistoryserver | Haibo Chen | Haibo Chen |
+| [HADOOP-13537](https://issues.apache.org/jira/browse/HADOOP-13537) | Support external calls in the RPC call queue |  Major | ipc | Daryn Sharp | Daryn Sharp |
+| [HDFS-10908](https://issues.apache.org/jira/browse/HDFS-10908) | Improve StripedBlockReader#createBlockReader error logging |  Minor | erasure-coding | Wei-Chiu Chuang | Manoj Govindassamy |
+| [HDFS-10910](https://issues.apache.org/jira/browse/HDFS-10910) | HDFS Erasure Coding doc should state its currently supported erasure coding policies |  Major | documentation, erasure-coding | Wei-Chiu Chuang | Yiqun Lin |
+| [HADOOP-13317](https://issues.apache.org/jira/browse/HADOOP-13317) | Add logs to KMS server-side to improve supportability |  Minor | kms | Xiao Chen | Suraj Acharya |
+| [HDFS-10940](https://issues.apache.org/jira/browse/HDFS-10940) | Reduce performance penalty of block caching when not used |  Major | namenode | Daryn Sharp | Daryn Sharp |
+| [MAPREDUCE-6638](https://issues.apache.org/jira/browse/MAPREDUCE-6638) | Do not attempt to recover progress from previous job attempts if spill encryption is enabled |  Major | applicationmaster | Karthik Kambatla | Haibo Chen |
+| [YARN-4855](https://issues.apache.org/jira/browse/YARN-4855) | Should check if node exists when replace nodelabels |  Minor | . | Tao Jie | Tao Jie |
+| [HDFS-10690](https://issues.apache.org/jira/browse/HDFS-10690) | Optimize insertion/removal of replica in ShortCircuitCache |  Major | hdfs-client | Fenghua Hu | Fenghua Hu |
+| [HADOOP-13685](https://issues.apache.org/jira/browse/HADOOP-13685) | Document -safely option of rm command. |  Major | . | Xiaoyu Yao | Xiaoyu Yao |
+| [HADOOP-13628](https://issues.apache.org/jira/browse/HADOOP-13628) | Support to retrieve specific property from configuration via REST API |  Major | conf | Weiwei Yang | Weiwei Yang |
+| [HDFS-10683](https://issues.apache.org/jira/browse/HDFS-10683) | Make class Token$PrivateToken private |  Minor | . | John Zhuge | John Zhuge |
+| [HDFS-10963](https://issues.apache.org/jira/browse/HDFS-10963) | Reduce log level when network topology cannot find enough datanodes. |  Minor | . | Xiao Chen | Xiao Chen |
+| [HADOOP-13323](https://issues.apache.org/jira/browse/HADOOP-13323) | Downgrade stack trace on FS load from Warn to debug |  Minor | fs | Steve Loughran | Steve Loughran |
+| [HADOOP-13688](https://issues.apache.org/jira/browse/HADOOP-13688) | Stop bundling HTML source code in javadoc JARs |  Major | build | Andrew Wang | Andrew Wang |
+| [HADOOP-13150](https://issues.apache.org/jira/browse/HADOOP-13150) | Avoid use of toString() in output of HDFS ACL shell commands. |  Minor | . | Chris Nauroth | Chris Nauroth |
+| [HADOOP-13689](https://issues.apache.org/jira/browse/HADOOP-13689) | Do not attach javadoc and sources jars during non-dist build |  Major | . | Andrew Wang | Andrew Wang |
+| [HADOOP-12579](https://issues.apache.org/jira/browse/HADOOP-12579) | Deprecate WriteableRPCEngine |  Major | . | Haohui Mai | Wei Zhou |
+| [HADOOP-13641](https://issues.apache.org/jira/browse/HADOOP-13641) | Update UGI#spawnAutoRenewalThreadForUserCreds to reduce indentation |  Minor | . | Xiao Chen | Huafeng Wang |
+| [YARN-5551](https://issues.apache.org/jira/browse/YARN-5551) | Ignore file backed pages from memory computation when smaps is enabled |  Minor | . | Rajesh Balamohan | Rajesh Balamohan |
+| [HDFS-10933](https://issues.apache.org/jira/browse/HDFS-10933) | Refactor TestFsck |  Minor | . | Takanobu Asanuma | Takanobu Asanuma |
+| [HADOOP-13684](https://issues.apache.org/jira/browse/HADOOP-13684) | Snappy may complain Hadoop is built without snappy if libhadoop is not found. |  Minor | . | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HADOOP-13705](https://issues.apache.org/jira/browse/HADOOP-13705) | Revert HADOOP-13534 Remove unused TrashPolicy#getInstance and initialize code |  Major | . | Andrew Wang | Andrew Wang |
+| [HADOOP-13698](https://issues.apache.org/jira/browse/HADOOP-13698) | Document caveat for KeyShell when underlying KeyProvider does not delete a key |  Minor | documentation, kms | Xiao Chen | Xiao Chen |
+| [HDFS-10789](https://issues.apache.org/jira/browse/HDFS-10789) | Route webhdfs through the RPC call queue |  Major | ipc, webhdfs | Daryn Sharp | Daryn Sharp |
+| [HDFS-10903](https://issues.apache.org/jira/browse/HDFS-10903) | Replace config key literal strings with config key names II: hadoop hdfs |  Minor | . | Mingliang Liu | Chen Liang |
+| [HADOOP-13710](https://issues.apache.org/jira/browse/HADOOP-13710) | Supress CachingGetSpaceUsed from logging interrupted exception stacktrace |  Minor | fs | Wei-Chiu Chuang | Hanisha Koneru |
+| [YARN-5599](https://issues.apache.org/jira/browse/YARN-5599) | Publish AM launch command to ATS |  Major | . | Daniel Templeton | Rohith Sharma K S |
+| [HDFS-11012](https://issues.apache.org/jira/browse/HDFS-11012) | Unnecessary INFO logging on DFSClients for InvalidToken |  Minor | fs | Harsh J | Harsh J |
+| [HDFS-11003](https://issues.apache.org/jira/browse/HDFS-11003) | Expose "XmitsInProgress" through DataNodeMXBean |  Major | . | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-13661](https://issues.apache.org/jira/browse/HADOOP-13661) | Upgrade HTrace version |  Major | . | Sean Mackrory | Sean Mackrory |
+| [HADOOP-13722](https://issues.apache.org/jira/browse/HADOOP-13722) | Code cleanup -- ViewFileSystem and InodeTree |  Minor | viewfs | Manoj Govindassamy | Manoj Govindassamy |
+| [HADOOP-13724](https://issues.apache.org/jira/browse/HADOOP-13724) | Fix a few typos in site markdown documents |  Minor | documentation | Andrew Wang | Ding Fei |
+| [YARN-5466](https://issues.apache.org/jira/browse/YARN-5466) | DefaultContainerExecutor needs JavaDocs |  Minor | nodemanager | Daniel Templeton | Daniel Templeton |
+| [HADOOP-13522](https://issues.apache.org/jira/browse/HADOOP-13522) | Add %A and %a formats for fs -stat command to print permissions |  Major | fs | Alex Garbarini | Alex Garbarini |
+| [HDFS-11009](https://issues.apache.org/jira/browse/HDFS-11009) | Add a tool to reconstruct block meta file from CLI |  Major | datanode | Xiao Chen | Xiao Chen |
+| [HDFS-9480](https://issues.apache.org/jira/browse/HDFS-9480) |  Expose nonDfsUsed via StorageTypeStats |  Major | . | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-13737](https://issues.apache.org/jira/browse/HADOOP-13737) | Cleanup DiskChecker interface |  Major | util | Arpit Agarwal | Arpit Agarwal |
+| [HADOOP-13702](https://issues.apache.org/jira/browse/HADOOP-13702) | Add a new instrumented read-write lock |  Major | common | Jingcheng Du | Jingcheng Du |
+| [HADOOP-13732](https://issues.apache.org/jira/browse/HADOOP-13732) | Upgrade OWASP dependency-check plugin version |  Minor | security | Mike Yoder | Mike Yoder |
+| [HADOOP-12082](https://issues.apache.org/jira/browse/HADOOP-12082) | Support multiple authentication schemes via AuthenticationFilter |  Major | security | Hrishikesh Gadre | Hrishikesh Gadre |
+| [HADOOP-13669](https://issues.apache.org/jira/browse/HADOOP-13669) | KMS Server should log exceptions before throwing |  Major | kms | Xiao Chen | Suraj Acharya |
+| [MAPREDUCE-6792](https://issues.apache.org/jira/browse/MAPREDUCE-6792) | Allow user's full principal name as owner of MapReduce staging directory in JobSubmissionFiles#JobStagingDir() |  Major | client | Santhosh G Nayak | Santhosh G Nayak |
+| [HDFS-5684](https://issues.apache.org/jira/browse/HDFS-5684) | Annotate o.a.h.fs.viewfs.ViewFileSystem.MountPoint as VisibleForTesting |  Minor | hdfs-client | Keith Turner | Manoj Govindassamy |
+| [YARN-5575](https://issues.apache.org/jira/browse/YARN-5575) | Many classes use bare yarn. properties instead of the defined constants |  Major | . | Daniel Templeton | Daniel Templeton |
+| [HADOOP-13659](https://issues.apache.org/jira/browse/HADOOP-13659) | Upgrade jaxb-api version |  Major | build | Sean Mackrory | Sean Mackrory |
+| [HADOOP-13502](https://issues.apache.org/jira/browse/HADOOP-13502) | Split fs.contract.is-blobstore flag into more descriptive flags for use by contract tests. |  Minor | test | Chris Nauroth | Chris Nauroth |
+| [HADOOP-13017](https://issues.apache.org/jira/browse/HADOOP-13017) | Implementations of InputStream.read(buffer, offset, bytes) to exit 0 if bytes==0 |  Major | io | Steve Loughran | Steve Loughran |
+| [HDFS-11049](https://issues.apache.org/jira/browse/HDFS-11049) | The description of dfs.block.replicator.classname is not clear |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HDFS-11069](https://issues.apache.org/jira/browse/HDFS-11069) | Tighten the authorization of datanode RPC |  Major | datanode, security | Kihwal Lee | Kihwal Lee |
+| [YARN-4456](https://issues.apache.org/jira/browse/YARN-4456) | Clean up Lint warnings in nodemanager |  Minor | nodemanager | Daniel Templeton | Daniel Templeton |
+| [HDFS-11055](https://issues.apache.org/jira/browse/HDFS-11055) | Update default-log4j.properties for httpfs to imporve test logging |  Major | httpfs, test | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [YARN-4710](https://issues.apache.org/jira/browse/YARN-4710) | Reduce logging application reserved debug info in FSAppAttempt#assignContainer |  Minor | fairscheduler | Yiqun Lin | Yiqun Lin |
+| [YARN-4668](https://issues.apache.org/jira/browse/YARN-4668) | Reuse objectMapper instance in Yarn |  Major | timelineclient | Yiqun Lin | Yiqun Lin |
+| [HDFS-11064](https://issues.apache.org/jira/browse/HDFS-11064) | Mention the default NN rpc ports in hdfs-default.xml |  Minor | documentation | Andrew Wang | Yiqun Lin |
+| [HDFS-10926](https://issues.apache.org/jira/browse/HDFS-10926) | Update staled configuration properties related to erasure coding |  Major | . | SammiChen | SammiChen |
+| [YARN-4963](https://issues.apache.org/jira/browse/YARN-4963) | capacity scheduler: Make number of OFF\_SWITCH assignments per heartbeat configurable |  Major | capacityscheduler | Nathan Roberts | Nathan Roberts |
+| [HDFS-11047](https://issues.apache.org/jira/browse/HDFS-11047) | Remove deep copies of FinalizedReplica to alleviate heap consumption on DataNode |  Major | datanode | Xiaobing Zhou | Xiaobing Zhou |
+| [HADOOP-10075](https://issues.apache.org/jira/browse/HADOOP-10075) | Update jetty dependency to version 9 |  Critical | . | Robert Rati | Robert Kanter |
+| [MAPREDUCE-6799](https://issues.apache.org/jira/browse/MAPREDUCE-6799) | Document mapreduce.jobhistory.webapp.https.address in mapred-default.xml |  Minor | documentation, jobhistoryserver | Akira Ajisaka | Yiqun Lin |
+| [HDFS-11074](https://issues.apache.org/jira/browse/HDFS-11074) | Remove unused method FsDatasetSpi#getFinalizedBlocksOnPersistentStorage |  Major | datanode | Arpit Agarwal | Hanisha Koneru |
+| [YARN-4907](https://issues.apache.org/jira/browse/YARN-4907) | Make all MockRM#waitForState consistent. |  Major | resourcemanager | Yufei Gu | Yufei Gu |
+| [YARN-4396](https://issues.apache.org/jira/browse/YARN-4396) | Log the trace information on FSAppAttempt#assignContainer |  Major | applications, fairscheduler | Yiqun Lin | Yiqun Lin |
+| [MAPREDUCE-6795](https://issues.apache.org/jira/browse/MAPREDUCE-6795) | Update the document for JobConf#setNumReduceTasks |  Major | documentation | Akira Ajisaka | Yiqun Lin |
+| [HADOOP-13603](https://issues.apache.org/jira/browse/HADOOP-13603) | Ignore package line length checkstyle rule |  Major | build | Shane Kumpf | Shane Kumpf |
+| [HADOOP-13583](https://issues.apache.org/jira/browse/HADOOP-13583) | Incorporate checkcompatibility script which runs Java API Compliance Checker |  Major | scripts | Andrew Wang | Andrew Wang |
+| [HADOOP-13738](https://issues.apache.org/jira/browse/HADOOP-13738) | DiskChecker should perform some disk IO |  Major | . | Arpit Agarwal | Arpit Agarwal |
+| [HADOOP-13667](https://issues.apache.org/jira/browse/HADOOP-13667) | Fix typing mistake of inline document in hadoop-metrics2.properties |  Major | documentation | Rui Gao | Rui Gao |
+| [HDFS-10909](https://issues.apache.org/jira/browse/HDFS-10909) | De-duplicate code in ErasureCodingWorker#initializeStripedReadThreadPool and DFSClient#initThreadsNumForStripedReads |  Minor | . | Wei-Chiu Chuang | Manoj Govindassamy |
+| [HADOOP-13784](https://issues.apache.org/jira/browse/HADOOP-13784) | Output javadoc inside the target directory |  Major | documentation | Andrew Wang | Andrew Wang |
+| [HDFS-11080](https://issues.apache.org/jira/browse/HDFS-11080) | Update HttpFS to use ConfigRedactor |  Major | . | Sean Mackrory | Sean Mackrory |
+| [YARN-5697](https://issues.apache.org/jira/browse/YARN-5697) | Use CliParser to parse options in RMAdminCLI |  Major | . | Tao Jie | Tao Jie |
+| [HADOOP-12453](https://issues.apache.org/jira/browse/HADOOP-12453) | Support decoding KMS Delegation Token with its own Identifier |  Major | kms, security | Xiaoyu Yao | Xiaoyu Yao |
+| [HDFS-11088](https://issues.apache.org/jira/browse/HDFS-11088) | Quash unnecessary safemode WARN message during NameNode startup |  Trivial | . | Andrew Wang | Yiqun Lin |
+| [MAPREDUCE-6796](https://issues.apache.org/jira/browse/MAPREDUCE-6796) | Remove unused properties from JTConfig.java |  Major | . | Akira Ajisaka | Haibo Chen |
+| [YARN-4998](https://issues.apache.org/jira/browse/YARN-4998) | Minor cleanup to UGI use in AdminService |  Trivial | resourcemanager | Daniel Templeton | Daniel Templeton |
+| [HDFS-10756](https://issues.apache.org/jira/browse/HDFS-10756) | Expose getTrashRoot to HTTPFS and WebHDFS |  Major | encryption, httpfs, webhdfs | Xiao Chen | Yuanbo Liu |
+| [MAPREDUCE-6790](https://issues.apache.org/jira/browse/MAPREDUCE-6790) | Update jackson from 1.9.13 to 2.x in hadoop-mapreduce |  Major | build | Akira Ajisaka | Akira Ajisaka |
+| [YARN-5720](https://issues.apache.org/jira/browse/YARN-5720) | Update document for "rmadmin -replaceLabelOnNode" |  Minor | . | Tao Jie | Tao Jie |
+| [YARN-5356](https://issues.apache.org/jira/browse/YARN-5356) | NodeManager should communicate physical resource capability to ResourceManager |  Major | nodemanager, resourcemanager | Nathan Roberts | Inigo Goiri |
+| [HADOOP-13802](https://issues.apache.org/jira/browse/HADOOP-13802) | Make generic options help more consistent, and aligned |  Minor | . | Grant Sohn | Grant Sohn |
+| [HADOOP-13782](https://issues.apache.org/jira/browse/HADOOP-13782) | Make MutableRates metrics thread-local write, aggregate-on-read |  Major | metrics | Erik Krogen | Erik Krogen |
+| [HDFS-9482](https://issues.apache.org/jira/browse/HDFS-9482) | Replace DatanodeInfo constructors with a builder pattern |  Major | . | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-13800](https://issues.apache.org/jira/browse/HADOOP-13800) | Remove unused HADOOP\_AUDIT\_LOGGER from hadoop-env.sh |  Minor | scripts | Akira Ajisaka | Yiqun Lin |
+| [HADOOP-13590](https://issues.apache.org/jira/browse/HADOOP-13590) | Retry until TGT expires even if the UGI renewal thread encountered exception |  Major | security | Xiao Chen | Xiao Chen |
+| [HDFS-11120](https://issues.apache.org/jira/browse/HDFS-11120) | TestEncryptionZones should waitActive |  Minor | test | Xiao Chen | John Zhuge |
+| [HADOOP-13687](https://issues.apache.org/jira/browse/HADOOP-13687) | Provide a unified dependency artifact that transitively includes the cloud storage modules shipped with Hadoop. |  Major | build | Chris Nauroth | Chris Nauroth |
+| [HADOOP-13720](https://issues.apache.org/jira/browse/HADOOP-13720) | Add more info to the msgs printed in AbstractDelegationTokenSecretManager for better supportability |  Trivial | common, security | Yongjun Zhang | Yongjun Zhang |
+| [HADOOP-13037](https://issues.apache.org/jira/browse/HADOOP-13037) | Refactor Azure Data Lake Store as an independent FileSystem |  Major | fs/adl | Shrikant Naidu | Vishwajeet Dusane |
+| [YARN-5552](https://issues.apache.org/jira/browse/YARN-5552) | Add Builder methods for common yarn API records |  Major | . | Arun Suresh | Tao Jie |
+| [HDFS-10941](https://issues.apache.org/jira/browse/HDFS-10941) | Improve BlockManager#processMisReplicatesAsync log |  Major | namenode | Xiaoyu Yao | Chen Liang |
+| [YARN-4033](https://issues.apache.org/jira/browse/YARN-4033) | In FairScheduler, parent queues should also display queue status |  Major | fairscheduler | Siqi Li | Siqi Li |
+| [HADOOP-13810](https://issues.apache.org/jira/browse/HADOOP-13810) | Add a test to verify that Configuration handles &-encoded characters |  Minor | test | Steve Loughran | Steve Loughran |
+| [HADOOP-13427](https://issues.apache.org/jira/browse/HADOOP-13427) | Eliminate needless uses of FileSystem#{exists(), isFile(), isDirectory()} |  Major | fs | Steve Loughran | Mingliang Liu |
+| [YARN-5736](https://issues.apache.org/jira/browse/YARN-5736) | YARN container executor config does not handle white space |  Trivial | nodemanager | Miklos Szegedi | Miklos Szegedi |
+| [YARN-5375](https://issues.apache.org/jira/browse/YARN-5375) | invoke MockRM#drainEvents implicitly in MockRM methods to reduce test failures |  Major | resourcemanager | sandflee | sandflee |
+| [HDFS-11147](https://issues.apache.org/jira/browse/HDFS-11147) | Remove confusing log output in FsDatasetImpl#getInitialVolumeFailureInfos |  Minor | datanode | Chen Liang | Chen Liang |
+| [HADOOP-13742](https://issues.apache.org/jira/browse/HADOOP-13742) | Expose "NumOpenConnectionsPerUser" as a metric |  Major | . | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-13660](https://issues.apache.org/jira/browse/HADOOP-13660) | Upgrade commons-configuration version to 2.1 |  Major | build | Sean Mackrory | Sean Mackrory |
+| [HDFS-11117](https://issues.apache.org/jira/browse/HDFS-11117) | Refactor striped file tests to allow flexibly test erasure coding policy |  Major | . | SammiChen | SammiChen |
+| [HADOOP-13646](https://issues.apache.org/jira/browse/HADOOP-13646) | Remove outdated overview.html |  Minor | . | Akira Ajisaka | Brahma Reddy Battula |
+| [YARN-5722](https://issues.apache.org/jira/browse/YARN-5722) | FairScheduler hides group resolution exceptions when assigning queue |  Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
+| [HADOOP-13166](https://issues.apache.org/jira/browse/HADOOP-13166) | add getFileStatus("/") test to AbstractContractGetFileStatusTest |  Minor | fs, test | Steve Loughran | Steve Loughran |
+| [HADOOP-11552](https://issues.apache.org/jira/browse/HADOOP-11552) | Allow handoff on the server side for RPC requests |  Major | ipc | Siddharth Seth | Siddharth Seth |
+| [HADOOP-13605](https://issues.apache.org/jira/browse/HADOOP-13605) | Clean up FileSystem javadocs, logging; improve diagnostics on FS load |  Major | fs | Steve Loughran | Steve Loughran |
+| [HADOOP-13018](https://issues.apache.org/jira/browse/HADOOP-13018) | Make Kdiag check whether hadoop.token.files points to existent and valid files |  Major | . | Ravi Prakash | Ravi Prakash |
+| [HADOOP-11603](https://issues.apache.org/jira/browse/HADOOP-11603) | Metric Snapshot log can be changed #MetricsSystemImpl.java since all the services will be initialized |  Minor | metrics | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-10776](https://issues.apache.org/jira/browse/HADOOP-10776) | Open up already widely-used APIs for delegation-token fetching & renewal to ecosystem projects |  Blocker | . | Robert Joseph Evans | Vinod Kumar Vavilapalli |
+| [HDFS-11175](https://issues.apache.org/jira/browse/HDFS-11175) | Document uppercase key names are not supported in TransparentEncryption.md |  Minor | documentation | Yuanbo Liu | Yiqun Lin |
+| [HADOOP-1381](https://issues.apache.org/jira/browse/HADOOP-1381) | The distance between sync blocks in SequenceFiles should be configurable |  Major | io | Owen O'Malley | Harsh J |
+| [HADOOP-13506](https://issues.apache.org/jira/browse/HADOOP-13506) | Redundant groupid warning in child projects |  Minor | . | Kai Sasaki | Kai Sasaki |
+| [YARN-5890](https://issues.apache.org/jira/browse/YARN-5890) | FairScheduler should log information about AM-resource-usage and max-AM-share for queues |  Major | fairscheduler | Yufei Gu | Yufei Gu |
+| [YARN-4997](https://issues.apache.org/jira/browse/YARN-4997) | Update fair scheduler to use pluggable auth provider |  Major | fairscheduler | Daniel Templeton | Tao Jie |
+| [HADOOP-13790](https://issues.apache.org/jira/browse/HADOOP-13790) | Make qbt script executable |  Trivial | scripts | Andrew Wang | Andrew Wang |
+| [HDFS-8674](https://issues.apache.org/jira/browse/HDFS-8674) | Improve performance of postponed block scans |  Critical | namenode | Daryn Sharp | Daryn Sharp |
+| [MAPREDUCE-6787](https://issues.apache.org/jira/browse/MAPREDUCE-6787) | Allow job\_conf.xml to be downloadable on the job overview page in JHS |  Major | jobhistoryserver | Haibo Chen | Haibo Chen |
+| [HDFS-10581](https://issues.apache.org/jira/browse/HDFS-10581) | Hide redundant table on NameNode WebUI when no nodes are decomissioning |  Trivial | hdfs, ui | Weiwei Yang | Weiwei Yang |
+| [HDFS-11211](https://issues.apache.org/jira/browse/HDFS-11211) | Add a time unit to the DataNode client trace format |  Minor | datanode | Akira Ajisaka | Jagadesh Kiran N |
+| [HADOOP-13827](https://issues.apache.org/jira/browse/HADOOP-13827) | Add reencryptEncryptedKey interface to KMS |  Major | kms | Xiao Chen | Xiao Chen |
+| [HDFS-10206](https://issues.apache.org/jira/browse/HDFS-10206) | Datanodes not sorted properly by distance when the reader isn't a datanode |  Major | . | Ming Ma | Nanda kumar |
+| [HDFS-11217](https://issues.apache.org/jira/browse/HDFS-11217) | Annotate NameNode and DataNode MXBean interfaces as Private/Stable |  Major | . | Akira Ajisaka | Jagadesh Kiran N |
+| [YARN-4457](https://issues.apache.org/jira/browse/YARN-4457) | Cleanup unchecked types for EventHandler |  Major | . | Daniel Templeton | Daniel Templeton |
+| [HADOOP-13900](https://issues.apache.org/jira/browse/HADOOP-13900) | Remove snapshot version of SDK dependency from Azure Data Lake Store File System |  Major | fs/adl | Vishwajeet Dusane | Vishwajeet Dusane |
+| [HDFS-10958](https://issues.apache.org/jira/browse/HDFS-10958) | Add instrumentation hooks around Datanode disk IO |  Major | datanode | Xiaoyu Yao | Arpit Agarwal |
+| [HDFS-11249](https://issues.apache.org/jira/browse/HDFS-11249) | Redundant toString() in DFSConfigKeys.java |  Trivial | . | Akira Ajisaka | Jagadesh Kiran N |
+| [YARN-5882](https://issues.apache.org/jira/browse/YARN-5882) | Test only changes from YARN-4126 |  Major | . | Andrew Wang | Jian He |
+| [HADOOP-13709](https://issues.apache.org/jira/browse/HADOOP-13709) | Ability to clean up subprocesses spawned by Shell when the process exits |  Major | . | Eric Badger | Eric Badger |
+| [HDFS-11262](https://issues.apache.org/jira/browse/HDFS-11262) | Remove unused variables in FSImage.java |  Trivial | . | Akira Ajisaka | Jagadesh Kiran N |
+| [HDFS-10930](https://issues.apache.org/jira/browse/HDFS-10930) | Refactor: Wrap Datanode IO related operations |  Major | datanode | Xiaoyu Yao | Xiaoyu Yao |
+| [HDFS-10959](https://issues.apache.org/jira/browse/HDFS-10959) | Adding per disk IO statistics and metrics in DataNode. |  Major | datanode | Xiaoyu Yao | Xiaoyu Yao |
+| [HDFS-10913](https://issues.apache.org/jira/browse/HDFS-10913) | Introduce fault injectors to simulate slow mirrors |  Major | datanode, test | Xiaobing Zhou | Xiaobing Zhou |
+| [HADOOP-13911](https://issues.apache.org/jira/browse/HADOOP-13911) | Remove TRUSTSTORE\_PASSWORD related scripts from KMS |  Minor | kms | Xiao Chen | John Zhuge |
+| [YARN-4994](https://issues.apache.org/jira/browse/YARN-4994) | Use MiniYARNCluster with try-with-resources in tests |  Trivial | test | Andras Bokor | Andras Bokor |
+| [HADOOP-13863](https://issues.apache.org/jira/browse/HADOOP-13863) | Azure: Add a new SAS key mode for WASB. |  Major | fs/azure | Dushyanth | Dushyanth |
+| [HDFS-10917](https://issues.apache.org/jira/browse/HDFS-10917) | Collect peer performance statistics on DataNode. |  Major | datanode | Xiaobing Zhou | Xiaobing Zhou |
+| [YARN-5969](https://issues.apache.org/jira/browse/YARN-5969) | FairShareComparator: Cache value of getResourceUsage for better performance |  Major | fairscheduler | zhangshilong | zhangshilong |
+| [HDFS-11275](https://issues.apache.org/jira/browse/HDFS-11275) | Check groupEntryIndex and throw a helpful exception on failures when removing ACL. |  Major | namenode | Xiao Chen | Xiao Chen |
+| [YARN-5709](https://issues.apache.org/jira/browse/YARN-5709) | Cleanup leader election configs and pluggability |  Critical | resourcemanager | Karthik Kambatla | Karthik Kambatla |
+| [HDFS-11279](https://issues.apache.org/jira/browse/HDFS-11279) | Cleanup unused DataNode#checkDiskErrorAsync() |  Minor | . | Xiaoyu Yao | Hanisha Koneru |
+| [HDFS-11156](https://issues.apache.org/jira/browse/HDFS-11156) | Add new op GETFILEBLOCKLOCATIONS to WebHDFS REST API |  Major | webhdfs | Weiwei Yang | Weiwei Yang |
+| [HDFS-9483](https://issues.apache.org/jira/browse/HDFS-9483) | Documentation does not cover use of "swebhdfs" as URL scheme for SSL-secured WebHDFS. |  Major | documentation | Chris Nauroth | Surendra Singh Lilhore |
+| [YARN-5991](https://issues.apache.org/jira/browse/YARN-5991) | Yarn Distributed Shell does not print throwable t to App Master When failed to start container |  Minor | . | dashwang | Jim Frankola |
+| [HDFS-11292](https://issues.apache.org/jira/browse/HDFS-11292) | log lastWrittenTxId etc info in logSyncAll |  Major | hdfs | Yongjun Zhang | Yongjun Zhang |
+| [HDFS-11273](https://issues.apache.org/jira/browse/HDFS-11273) | Move TransferFsImage#doGetUrl function to a Util class |  Major | . | Hanisha Koneru | Hanisha Koneru |
+| [YARN-6015](https://issues.apache.org/jira/browse/YARN-6015) | AsyncDispatcher thread name can be set to improved debugging |  Major | . | Ajith S | Ajith S |
+| [HADOOP-13953](https://issues.apache.org/jira/browse/HADOOP-13953) | Make FTPFileSystem's data connection mode and transfer mode configurable |  Major | fs | Xiao Chen | Xiao Chen |
+| [HDFS-11299](https://issues.apache.org/jira/browse/HDFS-11299) | Support multiple Datanode File IO hooks |  Major | hdfs | Hanisha Koneru | Hanisha Koneru |
+| [YARN-5849](https://issues.apache.org/jira/browse/YARN-5849) | Automatically create YARN control group for pre-mounted cgroups |  Minor | . | Miklos Szegedi | Miklos Szegedi |
+| [HDFS-11339](https://issues.apache.org/jira/browse/HDFS-11339) | Support File IO sampling for Datanode IO profiling hooks |  Major | datanode | Hanisha Koneru | Hanisha Koneru |
+| [HDFS-11274](https://issues.apache.org/jira/browse/HDFS-11274) | Datanode should only check the failed volume upon IO errors |  Major | datanode | Xiaoyu Yao | Xiaoyu Yao |
+| [MAPREDUCE-6819](https://issues.apache.org/jira/browse/MAPREDUCE-6819) | Replace UTF8 with Text in MRBench |  Minor | test | Akira Ajisaka | Peter Bacsko |
+| [HDFS-11306](https://issues.apache.org/jira/browse/HDFS-11306) | Print remaining edit logs from buffer if edit log can't be rolled. |  Major | ha, namenode | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HADOOP-13978](https://issues.apache.org/jira/browse/HADOOP-13978) | Update project release notes for 3.0.0-alpha2 |  Major | documentation | Andrew Wang | Andrew Wang |
+| [HADOOP-13955](https://issues.apache.org/jira/browse/HADOOP-13955) | Replace deprecated HttpServer2 and SSLFactory constants |  Minor | . | John Zhuge | John Zhuge |
+| [HADOOP-13496](https://issues.apache.org/jira/browse/HADOOP-13496) | Include file lengths in Mismatch in length error for distcp |  Minor | . | Ted Yu | Ted Yu |
+| [HADOOP-13999](https://issues.apache.org/jira/browse/HADOOP-13999) | Add -DskipShade maven profile to disable jar shading to reduce compile time |  Minor | build | Arun Suresh | Arun Suresh |
+| [YARN-6028](https://issues.apache.org/jira/browse/YARN-6028) | Add document for container metrics |  Major | documentation, nodemanager | Weiwei Yang | Weiwei Yang |
+| [MAPREDUCE-6728](https://issues.apache.org/jira/browse/MAPREDUCE-6728) | Give fetchers hint when ShuffleHandler rejects a shuffling connection |  Major | mrv2 | Haibo Chen | Haibo Chen |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [MAPREDUCE-4784](https://issues.apache.org/jira/browse/MAPREDUCE-4784) | TestRecovery occasionally fails |  Major | mrv2, test | Jason Lowe | Haibo Chen |
+| [HDFS-10760](https://issues.apache.org/jira/browse/HDFS-10760) | DataXceiver#run() should not log InvalidToken exception as an error |  Major | . | Pan Yuxuan | Pan Yuxuan |
+| [HDFS-10729](https://issues.apache.org/jira/browse/HDFS-10729) | Improve log message for edit loading failures caused by FS limit checks. |  Major | namenode | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [YARN-5221](https://issues.apache.org/jira/browse/YARN-5221) | Expose UpdateResourceRequest API to allow AM to request for change in container properties |  Major | . | Arun Suresh | Arun Suresh |
+| [HADOOP-13375](https://issues.apache.org/jira/browse/HADOOP-13375) | o.a.h.security.TestGroupsCaching.testBackgroundRefreshCounters seems flaky |  Major | security, test | Mingliang Liu | Weiwei Yang |
+| [HDFS-10820](https://issues.apache.org/jira/browse/HDFS-10820) | Reuse closeResponder to reset the response variable in DataStreamer#run |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [YARN-5555](https://issues.apache.org/jira/browse/YARN-5555) | Scheduler UI: "% of Queue" is inaccurate if leaf queue is hierarchically nested. |  Minor | . | Eric Payne | Eric Payne |
+| [YARN-5549](https://issues.apache.org/jira/browse/YARN-5549) | AMLauncher#createAMContainerLaunchContext() should not log the command to be launched indiscriminately |  Critical | resourcemanager | Daniel Templeton | Daniel Templeton |
+| [HDFS-10835](https://issues.apache.org/jira/browse/HDFS-10835) | Fix typos in httpfs.sh |  Trivial | httpfs | John Zhuge | John Zhuge |
+| [HDFS-10841](https://issues.apache.org/jira/browse/HDFS-10841) | Remove duplicate or unused variable in appendFile() |  Minor | . | Kihwal Lee | Kihwal Lee |
+| [HADOOP-13558](https://issues.apache.org/jira/browse/HADOOP-13558) | UserGroupInformation created from a Subject incorrectly tries to renew the Kerberos ticket |  Major | security | Alejandro Abdelnur | Xiao Chen |
+| [HADOOP-13388](https://issues.apache.org/jira/browse/HADOOP-13388) | Clean up TestLocalFileSystemPermission |  Trivial | fs | Andras Bokor | Andras Bokor |
+| [HDFS-10844](https://issues.apache.org/jira/browse/HDFS-10844) | test\_libhdfs\_threaded\_hdfs\_static and test\_libhdfs\_zerocopy\_hdfs\_static are failing |  Major | libhdfs | Akira Ajisaka | Akira Ajisaka |
+| [HDFS-9038](https://issues.apache.org/jira/browse/HDFS-9038) | DFS reserved space is erroneously counted towards non-DFS used. |  Major | datanode | Chris Nauroth | Brahma Reddy Battula |
+| [MAPREDUCE-6628](https://issues.apache.org/jira/browse/MAPREDUCE-6628) | Potential memory leak in CryptoOutputStream |  Major | security | Mariappan Asokan | Mariappan Asokan |
+| [HDFS-10832](https://issues.apache.org/jira/browse/HDFS-10832) | Propagate ACL bit and isEncrypted bit in HttpFS FileStatus permissions |  Critical | httpfs | Andrew Wang | Andrew Wang |
+| [HDFS-9781](https://issues.apache.org/jira/browse/HDFS-9781) | FsDatasetImpl#getBlockReports can occasionally throw NullPointerException |  Major | datanode | Wei-Chiu Chuang | Manoj Govindassamy |
+| [HDFS-10830](https://issues.apache.org/jira/browse/HDFS-10830) | FsDatasetImpl#removeVolumes crashes with IllegalMonitorStateException when vol being removed is in use |  Major | hdfs | Manoj Govindassamy | Arpit Agarwal |
+| [HADOOP-13587](https://issues.apache.org/jira/browse/HADOOP-13587) | distcp.map.bandwidth.mb is overwritten even when -bandwidth flag isn't set |  Minor | tools/distcp | Zoran Dimitrijevic | Zoran Dimitrijevic |
+| [HDFS-10856](https://issues.apache.org/jira/browse/HDFS-10856) | Update the comment of BPServiceActor$Scheduler#scheduleNextBlockReport |  Minor | documentation | Akira Ajisaka | Yiqun Lin |
+| [YARN-5630](https://issues.apache.org/jira/browse/YARN-5630) | NM fails to start after downgrade from 2.8 to 2.7 |  Blocker | nodemanager | Jason Lowe | Jason Lowe |
+| [HADOOP-13616](https://issues.apache.org/jira/browse/HADOOP-13616) | Broken code snippet area in Hadoop Benchmarking |  Minor | documentation | Kai Sasaki | Kai Sasaki |
+| [HDFS-10862](https://issues.apache.org/jira/browse/HDFS-10862) | Typos in 4 log messages |  Trivial | . | Mehran Hassani | Mehran Hassani |
+| [YARN-5163](https://issues.apache.org/jira/browse/YARN-5163) | Migrate TestClientToAMTokens and TestClientRMTokens tests from the old RPC engine |  Major | test | Arun Suresh | Wei Zhou |
+| [YARN-4232](https://issues.apache.org/jira/browse/YARN-4232) | TopCLI console support for HA mode |  Minor | . | Bibin A Chundatt | Bibin A Chundatt |
+| [MAPREDUCE-6777](https://issues.apache.org/jira/browse/MAPREDUCE-6777) | Typos in 4 log messages |  Trivial | . | Mehran Hassani | Mehran Hassani |
+| [YARN-5642](https://issues.apache.org/jira/browse/YARN-5642) | Typos in 9 log messages |  Trivial | . | Mehran Hassani | Mehran Hassani |
+| [YARN-5657](https://issues.apache.org/jira/browse/YARN-5657) | Fix TestDefaultContainerExecutor |  Major | test | Akira Ajisaka | Arun Suresh |
+| [YARN-5577](https://issues.apache.org/jira/browse/YARN-5577) | [Atsv2] Document object passing in infofilters with an example |  Major | timelinereader, timelineserver | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-5655](https://issues.apache.org/jira/browse/YARN-5655) | TestContainerManagerSecurity#testNMTokens is asserting |  Major | . | Jason Lowe | Robert Kanter |
+| [HADOOP-13601](https://issues.apache.org/jira/browse/HADOOP-13601) | Fix typo in a log messages of AbstractDelegationTokenSecretManager |  Trivial | . | Mehran Hassani | Mehran Hassani |
+| [HDFS-10879](https://issues.apache.org/jira/browse/HDFS-10879) | TestEncryptionZonesWithKMS#testReadWrite fails intermittently |  Major | . | Xiao Chen | Xiao Chen |
+| [HADOOP-13602](https://issues.apache.org/jira/browse/HADOOP-13602) | Fix some warnings by findbugs in hadoop-maven-plugin |  Major | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa |
+| [YARN-4973](https://issues.apache.org/jira/browse/YARN-4973) | YarnWebParams next.fresh.interval should be next.refresh.interval |  Minor | webapp | Daniel Templeton | Daniel Templeton |
+| [YARN-5539](https://issues.apache.org/jira/browse/YARN-5539) | TimelineClient failed to retry on "java.net.SocketTimeoutException: Read timed out" |  Critical | yarn | Sumana Sathish | Junping Du |
+| [HADOOP-13643](https://issues.apache.org/jira/browse/HADOOP-13643) | Math error in AbstractContractDistCpTest |  Minor | . | Aaron Fabbri | Aaron Fabbri |
+| [HDFS-10894](https://issues.apache.org/jira/browse/HDFS-10894) | Remove the redundant charactors for command -saveNamespace in HDFSCommands.md |  Trivial | documentation | Yiqun Lin | Yiqun Lin |
+| [HDFS-10886](https://issues.apache.org/jira/browse/HDFS-10886) | Replace "fs.default.name" with "fs.defaultFS" in viewfs document |  Minor | documentation, federation | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-10843](https://issues.apache.org/jira/browse/HDFS-10843) | Update space quota when a UC block is completed rather than committed. |  Major | hdfs, namenode | Erik Krogen | Erik Krogen |
+| [HDFS-10866](https://issues.apache.org/jira/browse/HDFS-10866) | Fix Eclipse Java 8 compile errors related to generic parameters. |  Major | . | Konstantin Shvachko | Konstantin Shvachko |
+| [YARN-5664](https://issues.apache.org/jira/browse/YARN-5664) | Fix Yarn documentation to link to correct versions. |  Minor | . | Xiao Chen | Xiao Chen |
+| [YARN-5663](https://issues.apache.org/jira/browse/YARN-5663) | Small refactor in ZKRMStateStore |  Minor | resourcemanager | Oleksii Dymytrov | Oleksii Dymytrov |
+| [HADOOP-13638](https://issues.apache.org/jira/browse/HADOOP-13638) | KMS should set UGI's Configuration object properly |  Major | kms | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HDFS-9885](https://issues.apache.org/jira/browse/HDFS-9885) | Correct the distcp counters name while displaying counters |  Minor | distcp | Archana T | Surendra Singh Lilhore |
+| [YARN-5660](https://issues.apache.org/jira/browse/YARN-5660) | Wrong audit constants are used in Get/Put of priority in RMWebService |  Trivial | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [HDFS-10889](https://issues.apache.org/jira/browse/HDFS-10889) | Remove outdated Fault Injection Framework documentaion |  Major | documentation | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-10713](https://issues.apache.org/jira/browse/HDFS-10713) | Throttle FsNameSystem lock warnings |  Major | logging, namenode | Arpit Agarwal | Hanisha Koneru |
+| [HDFS-10426](https://issues.apache.org/jira/browse/HDFS-10426) | TestPendingInvalidateBlock failed in trunk |  Major | test | Yiqun Lin | Yiqun Lin |
+| [HDFS-10828](https://issues.apache.org/jira/browse/HDFS-10828) | Fix usage of FsDatasetImpl object lock in ReplicaMap |  Blocker | . | Arpit Agarwal | Arpit Agarwal |
+| [YARN-5631](https://issues.apache.org/jira/browse/YARN-5631) | Missing refreshClusterMaxPriority usage in rmadmin help message |  Minor | . | Kai Sasaki | Kai Sasaki |
+| [HDFS-10376](https://issues.apache.org/jira/browse/HDFS-10376) | Enhance setOwner testing |  Major | . | Yongjun Zhang | John Zhuge |
+| [HDFS-10915](https://issues.apache.org/jira/browse/HDFS-10915) | Fix time measurement bug in TestDatanodeRestart#testWaitForRegistrationOnRestart |  Minor | test | Xiaobing Zhou | Xiaobing Zhou |
+| [HDFS-9444](https://issues.apache.org/jira/browse/HDFS-9444) | Add utility to find set of available ephemeral ports to ServerSocketUtil |  Major | . | Brahma Reddy Battula | Masatake Iwasaki |
+| [YARN-5662](https://issues.apache.org/jira/browse/YARN-5662) | Provide an option to enable ContainerMonitor |  Major | . | Jian He | Jian He |
+| [HADOOP-11780](https://issues.apache.org/jira/browse/HADOOP-11780) | Prevent IPC reader thread death |  Critical | ipc | Daryn Sharp | Daryn Sharp |
+| [HDFS-10824](https://issues.apache.org/jira/browse/HDFS-10824) | MiniDFSCluster#storageCapacities has no effects on real capacity |  Major | . | Xiaobing Zhou | Xiaobing Zhou |
+| [HDFS-10914](https://issues.apache.org/jira/browse/HDFS-10914) | Move remnants of oah.hdfs.client to hadoop-hdfs-client |  Critical | hdfs-client | Andrew Wang | Andrew Wang |
+| [HADOOP-13164](https://issues.apache.org/jira/browse/HADOOP-13164) | Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories |  Minor | fs/s3 | Rajesh Balamohan | Rajesh Balamohan |
+| [MAPREDUCE-6771](https://issues.apache.org/jira/browse/MAPREDUCE-6771) | RMContainerAllocator sends container diagnostics event after corresponding completion event |  Major | mrv2 | Haibo Chen | Haibo Chen |
+| [HADOOP-13640](https://issues.apache.org/jira/browse/HADOOP-13640) | Fix findbugs warning in VersionInfoMojo.java |  Major | . | Tsuyoshi Ozawa | Yuanbo Liu |
+| [HDFS-10850](https://issues.apache.org/jira/browse/HDFS-10850) | getEZForPath should NOT throw FNF |  Blocker | hdfs | Daryn Sharp | Andrew Wang |
+| [HADOOP-13671](https://issues.apache.org/jira/browse/HADOOP-13671) | Fix ClassFormatException in trunk build. |  Major | build | Kihwal Lee | Kihwal Lee |
+| [HDFS-10907](https://issues.apache.org/jira/browse/HDFS-10907) | Fix Erasure Coding documentation |  Trivial | documentation, erasure-coding | Wei-Chiu Chuang | Manoj Govindassamy |
+| [YARN-5693](https://issues.apache.org/jira/browse/YARN-5693) | Reduce loglevel to Debug in ContainerManagementProtocolProxy and AMRMClientImpl |  Major | yarn | Yufei Gu | Yufei Gu |
+| [YARN-5678](https://issues.apache.org/jira/browse/YARN-5678) | Log demand as demand in FSLeafQueue and FSParentQueue |  Major | fairscheduler | Yufei Gu | Yufei Gu |
+| [YARN-5672](https://issues.apache.org/jira/browse/YARN-5672) | FairScheduler: wrong queue name in log when adding application |  Minor | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
+| [YARN-4767](https://issues.apache.org/jira/browse/YARN-4767) | Network issues can cause persistent RM UI outage |  Critical | webapp | Daniel Templeton | Daniel Templeton |
+| [HDFS-10810](https://issues.apache.org/jira/browse/HDFS-10810) |  Setreplication removing block from underconstrcution temporarily when batch IBR is enabled. |  Major | namenode | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-10944](https://issues.apache.org/jira/browse/HDFS-10944) | Correct the javadoc of dfsadmin#disallowSnapshot |  Minor | documentation | Jagadesh Kiran N | Jagadesh Kiran N |
+| [HDFS-10947](https://issues.apache.org/jira/browse/HDFS-10947) | Correct the API name for truncate in webhdfs document |  Major | documentation | Surendra Singh Lilhore | Surendra Singh Lilhore |
+| [HDFS-10878](https://issues.apache.org/jira/browse/HDFS-10878) | TestDFSClientRetries#testIdempotentAllocateBlockAndClose throws ConcurrentModificationException |  Major | hdfs-client | Rushabh S Shah | Rushabh S Shah |
+| [HADOOP-12667](https://issues.apache.org/jira/browse/HADOOP-12667) | s3a: Support createNonRecursive API |  Major | fs/s3 | Sean Mackrory | Sean Mackrory |
+| [HDFS-10609](https://issues.apache.org/jira/browse/HDFS-10609) | Uncaught InvalidEncryptionKeyException during pipeline recovery may abort downstream applications |  Major | encryption | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HDFS-10962](https://issues.apache.org/jira/browse/HDFS-10962) | TestRequestHedgingProxyProvider is flaky |  Major | test | Andrew Wang | Andrew Wang |
+| [MAPREDUCE-6789](https://issues.apache.org/jira/browse/MAPREDUCE-6789) | Fix TestAMWebApp failure |  Major | test | Akira Ajisaka | Daniel Templeton |
+| [MAPREDUCE-6740](https://issues.apache.org/jira/browse/MAPREDUCE-6740) | Enforce mapreduce.task.timeout to be at least mapreduce.task.progress-report.interval |  Minor | mr-am | Haibo Chen | Haibo Chen |
+| [HADOOP-13690](https://issues.apache.org/jira/browse/HADOOP-13690) | Fix typos in core-default.xml |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [YARN-5101](https://issues.apache.org/jira/browse/YARN-5101) | YARN\_APPLICATION\_UPDATED event is parsed in ApplicationHistoryManagerOnTimelineStore#convertToApplicationReport with reversed order |  Major | . | Xuan Gong | Sunil G |
+| [YARN-5659](https://issues.apache.org/jira/browse/YARN-5659) | getPathFromYarnURL should use standard methods |  Major | . | Sergey Shelukhin | Sergey Shelukhin |
+| [HADOOP-12611](https://issues.apache.org/jira/browse/HADOOP-12611) | TestZKSignerSecretProvider#testMultipleInit occasionally fail |  Major | . | Wei-Chiu Chuang | Eric Badger |
+| [HDFS-10969](https://issues.apache.org/jira/browse/HDFS-10969) | Fix typos in hdfs-default.xml |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HDFS-10797](https://issues.apache.org/jira/browse/HDFS-10797) | Disk usage summary of snapshots causes renamed blocks to get counted twice |  Major | snapshots | Sean Mackrory | Sean Mackrory |
+| [YARN-5057](https://issues.apache.org/jira/browse/YARN-5057) | resourcemanager.security.TestDelegationTokenRenewer fails in trunk |  Major | . | Yongjun Zhang | Jason Lowe |
+| [HADOOP-13697](https://issues.apache.org/jira/browse/HADOOP-13697) | LogLevel#main throws exception if no arguments provided |  Major | . | Mingliang Liu | Mingliang Liu |
+| [HDFS-10991](https://issues.apache.org/jira/browse/HDFS-10991) | Export hdfsTruncateFile symbol in libhdfs |  Blocker | libhdfs | Surendra Singh Lilhore | Surendra Singh Lilhore |
+| [HADOOP-13700](https://issues.apache.org/jira/browse/HADOOP-13700) | Remove unthrown IOException from TrashPolicy#initialize and #getInstance signatures |  Critical | fs | Haibo Chen | Andrew Wang |
+| [HDFS-11002](https://issues.apache.org/jira/browse/HDFS-11002) | Fix broken attr/getfattr/setfattr links in ExtendedAttributes.md |  Major | documentation | Mingliang Liu | Mingliang Liu |
+| [HDFS-11000](https://issues.apache.org/jira/browse/HDFS-11000) | webhdfs PUT does not work if requests are routed to call queue. |  Major | . | Kihwal Lee | Kihwal Lee |
+| [HDFS-10987](https://issues.apache.org/jira/browse/HDFS-10987) | Make Decommission less expensive when lot of blocks present. |  Critical | . | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-13024](https://issues.apache.org/jira/browse/HADOOP-13024) | Distcp with -delete feature on raw data not implemented |  Major | . | Mavin Martin | Mavin Martin |
+| [HDFS-10986](https://issues.apache.org/jira/browse/HDFS-10986) | DFSAdmin should log detailed error message if any |  Major | tools | Mingliang Liu | Mingliang Liu |
+| [HADOOP-13723](https://issues.apache.org/jira/browse/HADOOP-13723) | AliyunOSSInputStream#read() should update read bytes stat correctly |  Major | tools | Mingliang Liu | Mingliang Liu |
+| [HDFS-10990](https://issues.apache.org/jira/browse/HDFS-10990) | TestPendingInvalidateBlock should wait for IBRs |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [HDFS-10735](https://issues.apache.org/jira/browse/HDFS-10735) | Distcp using webhdfs on secure HA clusters fails with StandbyException |  Major | webhdfs | Benoy Antony | Benoy Antony |
+| [HDFS-10883](https://issues.apache.org/jira/browse/HDFS-10883) | `getTrashRoot`'s behavior is not consistent in DFS after enabling EZ. |  Major | . | Yuanbo Liu | Yuanbo Liu |
+| [HADOOP-13707](https://issues.apache.org/jira/browse/HADOOP-13707) | If kerberos is enabled while HTTP SPNEGO is not configured, some links cannot be accessed |  Major | . | Yuanbo Liu | Yuanbo Liu |
+| [HDFS-10301](https://issues.apache.org/jira/browse/HDFS-10301) | BlockReport retransmissions may lead to storages falsely being declared zombie if storage report processing happens out of order |  Critical | namenode | Konstantin Shvachko | Vinitha Reddy Gankidi |
+| [HDFS-10920](https://issues.apache.org/jira/browse/HDFS-10920) | TestStorageMover#testNoSpaceDisk is failing intermittently |  Major | test | Rakesh R | Rakesh R |
+| [YARN-5718](https://issues.apache.org/jira/browse/YARN-5718) | TimelineClient (and other places in YARN) shouldn't over-write HDFS client retry settings which could cause unexpected behavior |  Major | resourcemanager, timelineclient | Junping Du | Junping Du |
+| [YARN-5743](https://issues.apache.org/jira/browse/YARN-5743) | [Atsv2] Publish queue name and RMAppMetrics to ATS |  Major | . | Rohith Sharma K S | Rohith Sharma K S |
+| [HDFS-10960](https://issues.apache.org/jira/browse/HDFS-10960) | TestDataNodeHotSwapVolumes#testRemoveVolumeBeingWritten fails at disk error verification after volume remove |  Minor | hdfs | Manoj Govindassamy | Manoj Govindassamy |
+| [HDFS-10752](https://issues.apache.org/jira/browse/HDFS-10752) | Several log refactoring/improvement suggestion in HDFS |  Major | . | Nemo Chen | Hanisha Koneru |
+| [HDFS-11025](https://issues.apache.org/jira/browse/HDFS-11025) | TestDiskspaceQuotaUpdate fails in trunk due to Bind exception |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [HDFS-10627](https://issues.apache.org/jira/browse/HDFS-10627) | Volume Scanner marks a block as "suspect" even if the exception is network-related |  Major | hdfs | Rushabh S Shah | Rushabh S Shah |
+| [HDFS-10699](https://issues.apache.org/jira/browse/HDFS-10699) | Log object instance get incorrectly in TestDFSAdmin |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [HDFS-11018](https://issues.apache.org/jira/browse/HDFS-11018) | Incorrect check and message in FsDatasetImpl#invalidate |  Major | datanode | Wei-Chiu Chuang | Yiqun Lin |
+| [HADOOP-13236](https://issues.apache.org/jira/browse/HADOOP-13236) | truncate will fail when we use viewfilesystem |  Major | . | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-10730](https://issues.apache.org/jira/browse/HDFS-10730) | Fix some failed tests due to BindException |  Major | . | Yiqun Lin | Yiqun Lin |
+| [YARN-5747](https://issues.apache.org/jira/browse/YARN-5747) | Application timeline metric aggregation in timeline v2 will lose last round aggregation when an application finishes |  Major | timelineserver | Li Lu | Li Lu |
+| [YARN-5679](https://issues.apache.org/jira/browse/YARN-5679) | TestAHSWebServices is failing |  Major | timelineserver | Akira Ajisaka | Akira Ajisaka |
+| [HADOOP-13749](https://issues.apache.org/jira/browse/HADOOP-13749) | KMSClientProvider combined with KeyProviderCache can result in wrong UGI being used |  Critical | . | Sergey Shelukhin | Xiaoyu Yao |
+| [HDFS-11042](https://issues.apache.org/jira/browse/HDFS-11042) | Add missing cleanupSSLConfig() call for tests that use setupSSLConfig() |  Major | test | Kuhu Shukla | Kuhu Shukla |
+| [HADOOP-13626](https://issues.apache.org/jira/browse/HADOOP-13626) | Remove distcp dependency on FileStatus serialization |  Major | tools/distcp | Chris Douglas | Chris Douglas |
+| [HDFS-11046](https://issues.apache.org/jira/browse/HDFS-11046) | Duplicate '-' in the daemon log name |  Major | logging | Akira Ajisaka | Akira Ajisaka |
+| [YARN-5711](https://issues.apache.org/jira/browse/YARN-5711) | Propogate exceptions back to client when using hedging RM failover provider |  Critical | applications, resourcemanager | Subru Krishnan | Subru Krishnan |
+| [YARN-5754](https://issues.apache.org/jira/browse/YARN-5754) | Null check missing for earliest in FifoPolicy |  Major | fairscheduler | Yufei Gu | Yufei Gu |
+| [YARN-5777](https://issues.apache.org/jira/browse/YARN-5777) | TestLogsCLI#testFetchApplictionLogsAsAnotherUser fails |  Major | test | Akira Ajisaka | Akira Ajisaka |
+| [HDFS-11015](https://issues.apache.org/jira/browse/HDFS-11015) | Enforce timeout in balancer |  Major | balancer & mover | Kihwal Lee | Kihwal Lee |
+| [HDFS-11040](https://issues.apache.org/jira/browse/HDFS-11040) | Add documentation for HDFS-9820 distcp improvement |  Major | distcp | Yongjun Zhang | Yongjun Zhang |
+| [YARN-5677](https://issues.apache.org/jira/browse/YARN-5677) | RM should transition to standby when connection is lost for an extended period |  Critical | resourcemanager | Daniel Templeton | Daniel Templeton |
+| [HDFS-11054](https://issues.apache.org/jira/browse/HDFS-11054) | Suppress verbose log message in BlockPlacementPolicyDefault |  Major | . | Arpit Agarwal | Chen Liang |
+| [HDFS-10935](https://issues.apache.org/jira/browse/HDFS-10935) | TestFileChecksum fails in some cases |  Major | . | Wei-Chiu Chuang | SammiChen |
+| [YARN-5753](https://issues.apache.org/jira/browse/YARN-5753) | fix NPE in AMRMClientImpl.getMatchingRequests() |  Major | yarn | Haibo Chen | Haibo Chen |
+| [HDFS-11050](https://issues.apache.org/jira/browse/HDFS-11050) | Change log level to 'warn' when ssl initialization fails and defaults to DEFAULT\_TIMEOUT\_CONN\_CONFIGURATOR |  Major | . | Kuhu Shukla | Kuhu Shukla |
+| [HDFS-11053](https://issues.apache.org/jira/browse/HDFS-11053) | Unnecessary superuser check in versionRequest() |  Major | namenode, security | Kihwal Lee | Kihwal Lee |
+| [YARN-5433](https://issues.apache.org/jira/browse/YARN-5433) | Audit dependencies for Category-X |  Blocker | timelineserver | Sean Busbey | Sangjin Lee |
+| [HDFS-10921](https://issues.apache.org/jira/browse/HDFS-10921) | TestDiskspaceQuotaUpdate doesn't wait for NN to get out of safe mode |  Major | . | Eric Badger | Eric Badger |
+| [HADOOP-8299](https://issues.apache.org/jira/browse/HADOOP-8299) | ViewFileSystem link slash mount point crashes with IndexOutOfBoundsException |  Major | viewfs | Eli Collins | Manoj Govindassamy |
+| [HDFS-9929](https://issues.apache.org/jira/browse/HDFS-9929) | Duplicate keys in NAMENODE\_SPECIFIC\_KEYS |  Minor | namenode | Akira Ajisaka | Akira Ajisaka |
+| [YARN-5752](https://issues.apache.org/jira/browse/YARN-5752) | TestLocalResourcesTrackerImpl#testLocalResourceCache times out |  Major | . | Eric Badger | Eric Badger |
+| [YARN-5710](https://issues.apache.org/jira/browse/YARN-5710) | Fix inconsistent naming in class ResourceRequest |  Trivial | yarn | Yufei Gu | Yufei Gu |
+| [YARN-5686](https://issues.apache.org/jira/browse/YARN-5686) | DefaultContainerExecutor random working dir algorigthm skews results |  Minor | . | Miklos Szegedi | Vrushali C |
+| [HDFS-10769](https://issues.apache.org/jira/browse/HDFS-10769) | BlockIdManager.clear doesn't reset the counter for blockGroupIdGenerator |  Minor | hdfs | Ewan Higgs | Yiqun Lin |
+| [MAPREDUCE-6798](https://issues.apache.org/jira/browse/MAPREDUCE-6798) | Fix intermittent failure of TestJobHistoryParsing.testJobHistoryMethods() |  Major | jobhistoryserver | Haibo Chen | Haibo Chen |
+| [HDFS-8492](https://issues.apache.org/jira/browse/HDFS-8492) | DN should notify NN when client requests a missing block |  Major | . | Daryn Sharp | Walter Su |
+| [YARN-5757](https://issues.apache.org/jira/browse/YARN-5757) | RM REST API documentation is not up to date |  Trivial | resourcemanager, yarn | Miklos Szegedi | Miklos Szegedi |
+| [MAPREDUCE-6541](https://issues.apache.org/jira/browse/MAPREDUCE-6541) | Exclude scheduled reducer memory when calculating available mapper slots from headroom to avoid deadlock |  Major | . | Wangda Tan | Varun Saxena |
+| [YARN-3848](https://issues.apache.org/jira/browse/YARN-3848) | TestNodeLabelContainerAllocation is not timing out |  Major | test | Jason Lowe | Varun Saxena |
+| [YARN-5420](https://issues.apache.org/jira/browse/YARN-5420) | Delete org.apache.hadoop.yarn.server.resourcemanager.resource.Priority as its not necessary |  Minor | resourcemanager | Sunil G | Sunil G |
+| [HADOOP-13201](https://issues.apache.org/jira/browse/HADOOP-13201) | Print the directory paths when ViewFs denies the rename operation on internal dirs |  Major | viewfs | Tianyin Xu | Rakesh R |
+| [YARN-5172](https://issues.apache.org/jira/browse/YARN-5172) | Update yarn daemonlog documentation due to HADOOP-12847 |  Trivial | documentation | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [YARN-4831](https://issues.apache.org/jira/browse/YARN-4831) | Recovered containers will be killed after NM stateful restart |  Major | nodemanager | Siqi Li | Siqi Li |
+| [YARN-4388](https://issues.apache.org/jira/browse/YARN-4388) | Cleanup "mapreduce.job.hdfs-servers" from yarn-default.xml |  Minor | yarn | Junping Du | Junping Du |
+| [YARN-5776](https://issues.apache.org/jira/browse/YARN-5776) | Checkstyle: MonitoringThread.Run method length is too long |  Trivial | nodemanager | Miklos Szegedi | Miklos Szegedi |
+| [YARN-3432](https://issues.apache.org/jira/browse/YARN-3432) | Cluster metrics have wrong Total Memory when there is reserved memory on CS |  Major | capacityscheduler, resourcemanager | Thomas Graves | Brahma Reddy Battula |
+| [HDFS-9500](https://issues.apache.org/jira/browse/HDFS-9500) | datanodesSoftwareVersions map may counting wrong when rolling upgrade |  Major | . | Phil Yang | Erik Krogen |
+| [MAPREDUCE-2631](https://issues.apache.org/jira/browse/MAPREDUCE-2631) | Potential resource leaks in BinaryProtocol$TeeOutputStream.java |  Major | . | Ravi Teja Ch N V | Sunil G |
+| [YARN-2306](https://issues.apache.org/jira/browse/YARN-2306) | Add test for leakage of reservation metrics in fair scheduler |  Minor | fairscheduler | Hong Zhiguo | Hong Zhiguo |
+| [YARN-4743](https://issues.apache.org/jira/browse/YARN-4743) | FairSharePolicy breaks TimSort assumption |  Major | fairscheduler | Zephyr Guo | Zephyr Guo |
+| [HADOOP-13763](https://issues.apache.org/jira/browse/HADOOP-13763) | KMS REST API Documentation Decrypt URL typo |  Minor | documentation, kms | Jeffrey E  Rodriguez | Jeffrey E  Rodriguez |
+| [YARN-5794](https://issues.apache.org/jira/browse/YARN-5794) | Fix the asflicense warnings |  Major | . | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13770](https://issues.apache.org/jira/browse/HADOOP-13770) | Shell.checkIsBashSupported swallowed an interrupted exception |  Blocker | util | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [YARN-5027](https://issues.apache.org/jira/browse/YARN-5027) | NM should clean up app log dirs after NM restart |  Major | nodemanager | sandflee | sandflee |
+| [YARN-5767](https://issues.apache.org/jira/browse/YARN-5767) | Fix the order that resources are cleaned up from the local Public/Private caches |  Major | . | Chris Trezzo | Chris Trezzo |
+| [HDFS-11061](https://issues.apache.org/jira/browse/HDFS-11061) | Update dfs -count -t command line help and documentation |  Minor | documentation, fs | Wei-Chiu Chuang | Yiqun Lin |
+| [YARN-5773](https://issues.apache.org/jira/browse/YARN-5773) | RM recovery too slow due to LeafQueue#activateApplication() |  Critical | capacity scheduler, rolling upgrade | Bibin A Chundatt | Bibin A Chundatt |
+| [YARN-5793](https://issues.apache.org/jira/browse/YARN-5793) | Trim configuration values in DockerLinuxContainerRuntime |  Minor | nodemanager | Tianyin Xu | Tianyin Xu |
+| [YARN-5800](https://issues.apache.org/jira/browse/YARN-5800) | Delete LinuxContainerExecutor comment from yarn-default.xml |  Trivial | yarn | Daniel Templeton | Jan Hentschel |
+| [YARN-5809](https://issues.apache.org/jira/browse/YARN-5809) | AsyncDispatcher possibly invokes multiple shutdown thread when handling exception |  Major | . | Jian He | Jian He |
+| [HADOOP-8500](https://issues.apache.org/jira/browse/HADOOP-8500) | Fix javadoc jars to not contain entire target directory |  Minor | build | EJ Ciramella | Andrew Wang |
+| [HDFS-10455](https://issues.apache.org/jira/browse/HDFS-10455) | Logging the username when deny the setOwner operation |  Minor | namenode | Tianyin Xu | Rakesh R |
+| [YARN-5805](https://issues.apache.org/jira/browse/YARN-5805) | Add isDebugEnabled check for debug logs in nodemanager |  Minor | . | Bibin A Chundatt | Bibin A Chundatt |
+| [YARN-5788](https://issues.apache.org/jira/browse/YARN-5788) | Apps not activiated and AM limit resource in UI and REST not updated after -replaceLabelsOnNode |  Major | . | Bibin A Chundatt | Bibin A Chundatt |
+| [YARN-5001](https://issues.apache.org/jira/browse/YARN-5001) | Aggregated Logs root directory is created with wrong group if nonexistent |  Major | log-aggregation, nodemanager, security | Haibo Chen | Haibo Chen |
+| [MAPREDUCE-6765](https://issues.apache.org/jira/browse/MAPREDUCE-6765) | MR should not schedule container requests in cases where reducer or mapper containers demand resource larger than the maximum supported |  Minor | mr-am | Haibo Chen | Haibo Chen |
+| [YARN-5815](https://issues.apache.org/jira/browse/YARN-5815) | Random failure of TestApplicationPriority.testOrderOfActivatingThePriorityApplicationOnRMRestart |  Major | . | Bibin A Chundatt | Bibin A Chundatt |
+| [HDFS-11095](https://issues.apache.org/jira/browse/HDFS-11095) | BlockManagerSafeMode should respect extension period default config value (30s) |  Minor | namenode | Mingliang Liu | Mingliang Liu |
+| [YARN-4862](https://issues.apache.org/jira/browse/YARN-4862) | Handle duplicate completed containers in RMNodeImpl |  Major | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [HDFS-11097](https://issues.apache.org/jira/browse/HDFS-11097) | Fix the jenkins warning related to the deprecated method StorageReceivedDeletedBlocks |  Major | . | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13787](https://issues.apache.org/jira/browse/HADOOP-13787) | Azure testGlobStatusThrowsExceptionForUnreadableDir fails |  Minor | fs/azure | John Zhuge | John Zhuge |
+| [HDFS-11098](https://issues.apache.org/jira/browse/HDFS-11098) | Datanode in tests cannot start in Windows after HDFS-10638 |  Blocker | datanode | Vinayakumar B | Vinayakumar B |
+| [YARN-5837](https://issues.apache.org/jira/browse/YARN-5837) | NPE when getting node status of a decommissioned node after an RM restart |  Major | . | Robert Kanter | Robert Kanter |
+| [HADOOP-13798](https://issues.apache.org/jira/browse/HADOOP-13798) | TestHadoopArchives times out |  Major | test | Akira Ajisaka | Akira Ajisaka |
+| [HADOOP-13797](https://issues.apache.org/jira/browse/HADOOP-13797) | Remove hardcoded absolute path for ls |  Major | util | Christine Koppelt | Christine Koppelt |
+| [HADOOP-13795](https://issues.apache.org/jira/browse/HADOOP-13795) | Skip testGlobStatusThrowsExceptionForUnreadableDir in TestFSMainOperationsSwift |  Major | fs/swift, test | John Zhuge | John Zhuge |
+| [HADOOP-13803](https://issues.apache.org/jira/browse/HADOOP-13803) | Revert HADOOP-13081 add the ability to create multiple UGIs/subjects from one kerberos login |  Major | security | Andrew Wang | Chris Nauroth |
+| [YARN-5847](https://issues.apache.org/jira/browse/YARN-5847) | Revert health check exit code check |  Major | nodemanager | Allen Wittenauer | Allen Wittenauer |
+| [HADOOP-13804](https://issues.apache.org/jira/browse/HADOOP-13804) | MutableStat mean loses accuracy if add(long, long) is used |  Minor | metrics | Erik Krogen | Erik Krogen |
+| [YARN-5377](https://issues.apache.org/jira/browse/YARN-5377) | Fix TestQueuingContainerManager.testKillMultipleOpportunisticContainers |  Major | . | Rohith Sharma K S | Konstantinos Karanasos |
+| [MAPREDUCE-6782](https://issues.apache.org/jira/browse/MAPREDUCE-6782) | JHS task page search based on each individual column not working |  Major | jobhistoryserver | Bibin A Chundatt | Ajith S |
+| [HADOOP-13789](https://issues.apache.org/jira/browse/HADOOP-13789) | Hadoop Common includes generated test protos in both jar and test-jar |  Major | build, common | Sean Busbey | Sean Busbey |
+| [YARN-5823](https://issues.apache.org/jira/browse/YARN-5823) | Update NMTokens in case of requests with only opportunistic containers |  Blocker | . | Konstantinos Karanasos | Konstantinos Karanasos |
+| [HADOOP-13346](https://issues.apache.org/jira/browse/HADOOP-13346) | DelegationTokenAuthenticationHandler writes via closed writer |  Minor | security | Gregory Chanan | Hrishikesh Gadre |
+| [YARN-5856](https://issues.apache.org/jira/browse/YARN-5856) | Unnecessary duplicate start container request sent to NM State store |  Major | . | Varun Saxena | Varun Saxena |
+| [YARN-5862](https://issues.apache.org/jira/browse/YARN-5862) | TestDiskFailures.testLocalDirsFailures failed |  Major | . | Yufei Gu | Yufei Gu |
+| [YARN-5453](https://issues.apache.org/jira/browse/YARN-5453) | FairScheduler#update may skip update demand resource of child queue/app if current demand reached maxResource |  Major | fairscheduler | sandflee | sandflee |
+| [YARN-5843](https://issues.apache.org/jira/browse/YARN-5843) | Incorrect documentation for timeline service entityType/events REST end points |  Minor | . | Bibin A Chundatt | Bibin A Chundatt |
+| [HDFS-9337](https://issues.apache.org/jira/browse/HDFS-9337) | Validate required params for WebHDFS requests |  Major | . | Jagadesh Kiran N | Jagadesh Kiran N |
+| [YARN-5834](https://issues.apache.org/jira/browse/YARN-5834) | TestNodeStatusUpdater.testNMRMConnectionConf compares nodemanager wait time to the incorrect value |  Trivial | . | Miklos Szegedi | Chang Li |
+| [HDFS-11128](https://issues.apache.org/jira/browse/HDFS-11128) | CreateEditsLog throws NullPointerException |  Major | hdfs | Hanisha Koneru | Hanisha Koneru |
+| [YARN-5868](https://issues.apache.org/jira/browse/YARN-5868) | Update npm to latest version in Dockerfile to avoid random failures of npm while run maven build |  Major | yarn-ui-v2 | Sunil G | Sunil G |
+| [YARN-5545](https://issues.apache.org/jira/browse/YARN-5545) | Fix issues related to Max App in capacity scheduler |  Major | capacity scheduler | Bibin A Chundatt | Bibin A Chundatt |
+| [HDFS-11129](https://issues.apache.org/jira/browse/HDFS-11129) | TestAppendSnapshotTruncate fails with bind exception |  Major | test | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-13813](https://issues.apache.org/jira/browse/HADOOP-13813) | TestDelegationTokenFetcher#testDelegationTokenWithoutRenewer is failing |  Major | security, test | Mingliang Liu | Mingliang Liu |
+| [HDFS-11135](https://issues.apache.org/jira/browse/HDFS-11135) | The tests in TestBalancer run fails due to NPE |  Major | test | Yiqun Lin | Yiqun Lin |
+| [HDFS-11056](https://issues.apache.org/jira/browse/HDFS-11056) | Concurrent append and read operations lead to checksum error |  Major | datanode, httpfs | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [MAPREDUCE-6797](https://issues.apache.org/jira/browse/MAPREDUCE-6797) | Job history server scans can become blocked on a single, slow entry |  Critical | jobhistoryserver | Prabhu Joseph | Prabhu Joseph |
+| [YARN-5874](https://issues.apache.org/jira/browse/YARN-5874) | RM -format-state-store and -remove-application-from-state-store commands fail with NPE |  Critical | resourcemanager | Varun Saxena | Varun Saxena |
+| [YARN-5873](https://issues.apache.org/jira/browse/YARN-5873) | RM crashes with NPE if generic application history is enabled |  Critical | resourcemanager | Varun Saxena | Varun Saxena |
+| [YARN-4355](https://issues.apache.org/jira/browse/YARN-4355) | NPE while processing localizer heartbeat |  Major | nodemanager | Jason Lowe | Varun Saxena |
+| [YARN-4218](https://issues.apache.org/jira/browse/YARN-4218) | Metric for resource\*time that was preempted |  Major | resourcemanager | Chang Li | Chang Li |
+| [YARN-5875](https://issues.apache.org/jira/browse/YARN-5875) | TestTokenClientRMService#testTokenRenewalWrongUser fails |  Major | . | Varun Saxena | Gergely Novák |
+| [HADOOP-13815](https://issues.apache.org/jira/browse/HADOOP-13815) | TestKMS#testDelegationTokensOpsSimple and TestKMS#testDelegationTokensOpsKerberized Fails in Trunk |  Major | test | Brahma Reddy Battula | Xiao Chen |
+| [YARN-5765](https://issues.apache.org/jira/browse/YARN-5765) | Revert CHMOD on the new dirs created-LinuxContainerExecutor creates appcache and its subdirectories with wrong group owner. |  Blocker | . | Haibo Chen | Naganarasimha G R |
+| [MAPREDUCE-6811](https://issues.apache.org/jira/browse/MAPREDUCE-6811) | TestPipeApplication#testSubmitter fails after HADOOP-13802 |  Major | test | Brahma Reddy Battula | Brahma Reddy Battula |
+| [YARN-5891](https://issues.apache.org/jira/browse/YARN-5891) | yarn rmadmin -help contains a misspelled ResourceManager |  Trivial | resourcemanager | Grant Sohn | Grant Sohn |
+| [YARN-5836](https://issues.apache.org/jira/browse/YARN-5836) | Malicious AM can kill containers of other apps running in any node its containers are running |  Minor | nodemanager | Botong Huang | Botong Huang |
+| [YARN-5870](https://issues.apache.org/jira/browse/YARN-5870) | Expose getApplications API in YarnClient with GetApplicationsRequest parameter |  Major | client | Gour Saha | Jian He |
+| [HDFS-11134](https://issues.apache.org/jira/browse/HDFS-11134) | Fix bind exception threw in TestRenameWhileOpen |  Major | . | Yiqun Lin | Yiqun Lin |
+| [YARN-3538](https://issues.apache.org/jira/browse/YARN-3538) | TimelineServer doesn't catch/translate all exceptions raised |  Minor | timelineserver | Steve Loughran | Steve Loughran |
+| [YARN-5904](https://issues.apache.org/jira/browse/YARN-5904) | Reduce the number of default server threads for AMRMProxyService |  Minor | nodemanager | Subru Krishnan | Subru Krishnan |
+| [YARN-5271](https://issues.apache.org/jira/browse/YARN-5271) | ATS client doesn't work with Jersey 2 on the classpath |  Major | client, timelineserver | Steve Loughran | Weiwei Yang |
+| [MAPREDUCE-6801](https://issues.apache.org/jira/browse/MAPREDUCE-6801) | Fix flaky TestKill.testKillJob() |  Major | mrv2 | Haibo Chen | Haibo Chen |
+| [HADOOP-13814](https://issues.apache.org/jira/browse/HADOOP-13814) | Sample configuration of KMS HTTP Authentication signature is misleading |  Minor | conf, documentation, kms | Masahiro Tanaka | Masahiro Tanaka |
+| [HDFS-11144](https://issues.apache.org/jira/browse/HDFS-11144) | TestFileCreationDelete#testFileCreationDeleteParent fails wind bind exception |  Major | test | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-11101](https://issues.apache.org/jira/browse/HDFS-11101) | TestDFSShell#testMoveWithTargetPortEmpty fails intermittently |  Major | test | Brahma Reddy Battula | Brahma Reddy Battula |
+| [YARN-5859](https://issues.apache.org/jira/browse/YARN-5859) | TestResourceLocalizationService#testParallelDownloadAttemptsForPublicResource sometimes fails |  Major | test | Jason Lowe | Eric Badger |
+| [MAPREDUCE-6793](https://issues.apache.org/jira/browse/MAPREDUCE-6793) | io.sort.factor code default and mapred-default.xml values inconsistent |  Trivial | task | Gera Shegalov | Prabhu Joseph |
+| [HDFS-10966](https://issues.apache.org/jira/browse/HDFS-10966) | Enhance Dispatcher logic on deciding when to give up a source DataNode |  Major | balancer & mover | Zhe Zhang | Mark Wagner |
+| [HADOOP-13663](https://issues.apache.org/jira/browse/HADOOP-13663) | Index out of range in SysInfoWindows |  Major | scripts | Inigo Goiri | Inigo Goiri |
+| [YARN-5911](https://issues.apache.org/jira/browse/YARN-5911) | DrainDispatcher does not drain all events on stop even if setDrainEventsOnStop is true |  Major | . | Varun Saxena | Varun Saxena |
+| [YARN-5918](https://issues.apache.org/jira/browse/YARN-5918) | Handle Opportunistic scheduling allocate request failure when NM is lost |  Major | . | Bibin A Chundatt | Bibin A Chundatt |
+| [HADOOP-13766](https://issues.apache.org/jira/browse/HADOOP-13766) | Fix a typo in the comments of RPC.getProtocolVersion |  Trivial | common | Ethan Li | Ethan Li |
+| [YARN-5920](https://issues.apache.org/jira/browse/YARN-5920) | Fix deadlock in TestRMHA.testTransitionedToStandbyShouldNotHang |  Major | test | Rohith Sharma K S | Varun Saxena |
+| [HADOOP-13833](https://issues.apache.org/jira/browse/HADOOP-13833) | TestSymlinkHdfsFileSystem#testCreateLinkUsingPartQualPath2 fails after HADOOP13605 |  Critical | test | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-11174](https://issues.apache.org/jira/browse/HDFS-11174) | Wrong HttpFS test command in doc |  Minor | documentation, httpfs | John Zhuge | John Zhuge |
+| [HADOOP-13820](https://issues.apache.org/jira/browse/HADOOP-13820) | Replace ugi.getUsername() with ugi.getShortUserName() in viewFS |  Minor | viewfs | Archana T | Brahma Reddy Battula |
+| [YARN-5572](https://issues.apache.org/jira/browse/YARN-5572) | HBaseTimelineWriterImpl appears to reference a bad property name |  Major | . | Daniel Templeton | Varun Saxena |
+| [HADOOP-13816](https://issues.apache.org/jira/browse/HADOOP-13816) | Ambiguous plugin version warning from maven build. |  Minor | . | Kai Sasaki | Kai Sasaki |
+| [HADOOP-13838](https://issues.apache.org/jira/browse/HADOOP-13838) | KMSTokenRenewer should close providers |  Critical | kms | Xiao Chen | Xiao Chen |
+| [YARN-5725](https://issues.apache.org/jira/browse/YARN-5725) | Test uncaught exception in TestContainersMonitorResourceChange.testContainersResourceChange when setting IP and host |  Minor | nodemanager | Miklos Szegedi | Miklos Szegedi |
+| [YARN-5851](https://issues.apache.org/jira/browse/YARN-5851) | TestContainerManagerSecurity testContainerManager[1] failed |  Major | nodemanager | Haibo Chen | Haibo Chen |
+| [MAPREDUCE-6565](https://issues.apache.org/jira/browse/MAPREDUCE-6565) | Configuration to use host name in delegation token service is not read from job.xml during MapReduce job execution. |  Major | . | Chris Nauroth | Li Lu |
+| [YARN-5942](https://issues.apache.org/jira/browse/YARN-5942) | "Overridden" is misspelled as "overriden" in FairScheduler.md |  Trivial | site | Daniel Templeton | Heather Sutherland |
+| [HADOOP-13830](https://issues.apache.org/jira/browse/HADOOP-13830) | Intermittent failure of ITestS3NContractRootDir#testRecursiveRootListing: "Can not create a Path from an empty string" |  Minor | fs/s3, test | Steve Loughran | Steve Loughran |
+| [HDFS-11132](https://issues.apache.org/jira/browse/HDFS-11132) | Allow AccessControlException in contract tests when getFileStatus on subdirectory of existing files |  Major | test | Vishwajeet Dusane | Vishwajeet Dusane |
+| [YARN-5915](https://issues.apache.org/jira/browse/YARN-5915) | ATS 1.5 FileSystemTimelineWriter causes flush() to be called after every event write |  Major | timelineserver | Atul Sikaria | Atul Sikaria |
+| [MAPREDUCE-6815](https://issues.apache.org/jira/browse/MAPREDUCE-6815) | Fix flaky TestKill.testKillTask() |  Major | mrv2 | Haibo Chen | Haibo Chen |
+| [YARN-5901](https://issues.apache.org/jira/browse/YARN-5901) | Fix race condition in TestGetGroups beforeclass setup() |  Major | yarn | Haibo Chen | Haibo Chen |
+| [YARN-5929](https://issues.apache.org/jira/browse/YARN-5929) | Missing scheduling policy in the FS queue metric. |  Major | . | Yufei Gu | Yufei Gu |
+| [HDFS-11181](https://issues.apache.org/jira/browse/HDFS-11181) | Fuse wrapper has a typo |  Trivial | fuse-dfs | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HADOOP-13847](https://issues.apache.org/jira/browse/HADOOP-13847) | KMSWebApp should close KeyProviderCryptoExtension |  Major | kms | Anthony Young-Garner | John Zhuge |
+| [YARN-5559](https://issues.apache.org/jira/browse/YARN-5559) | Analyse 2.8.0/3.0.0 jdiff reports and fix any issues |  Blocker | resourcemanager | Wangda Tan | Akira Ajisaka |
+| [HADOOP-13675](https://issues.apache.org/jira/browse/HADOOP-13675) | Bug in return value for delete() calls in WASB |  Major | fs/azure | Dushyanth | Dushyanth |
+| [HADOOP-13864](https://issues.apache.org/jira/browse/HADOOP-13864) | KMS should not require truststore password |  Major | kms, security | Mike Yoder | Mike Yoder |
+| [HADOOP-13861](https://issues.apache.org/jira/browse/HADOOP-13861) | Spelling errors in logging and exceptions for code |  Major | common, fs, io, security | Grant Sohn | Grant Sohn |
+| [HDFS-11180](https://issues.apache.org/jira/browse/HDFS-11180) | Intermittent deadlock in NameNode when failover happens. |  Blocker | namenode | Abhishek Modi | Akira Ajisaka |
+| [HDFS-11198](https://issues.apache.org/jira/browse/HDFS-11198) | NN UI should link DN web address using hostnames |  Critical | . | Kihwal Lee | Weiwei Yang |
+| [MAPREDUCE-6571](https://issues.apache.org/jira/browse/MAPREDUCE-6571) | JobEndNotification info logs are missing in AM container syslog |  Minor | applicationmaster | Prabhu Joseph | Haibo Chen |
+| [MAPREDUCE-6816](https://issues.apache.org/jira/browse/MAPREDUCE-6816) | Progress bars in Web UI always at 100% |  Blocker | webapps | Shen Yinjie | Shen Yinjie |
+| [HADOOP-13859](https://issues.apache.org/jira/browse/HADOOP-13859) | TestConfigurationFieldsBase fails for fields that are DEFAULT values of skipped properties. |  Major | common | Haibo Chen | Haibo Chen |
+| [YARN-5184](https://issues.apache.org/jira/browse/YARN-5184) | Fix up incompatible changes introduced on ContainerStatus and NodeReport |  Blocker | api | Karthik Kambatla | Sangjin Lee |
+| [YARN-5932](https://issues.apache.org/jira/browse/YARN-5932) | Retrospect moveApplicationToQueue in align with YARN-5611 |  Major | capacity scheduler, resourcemanager | Sunil G | Sunil G |
+| [YARN-5136](https://issues.apache.org/jira/browse/YARN-5136) | Error in handling event type APP\_ATTEMPT\_REMOVED to the scheduler |  Major | . | tangshangwen | Wilfred Spiegelenburg |
+| [MAPREDUCE-6817](https://issues.apache.org/jira/browse/MAPREDUCE-6817) | The format of job start time in JHS is different from those of submit and finish time |  Major | jobhistoryserver | Haibo Chen | Haibo Chen |
+| [YARN-5963](https://issues.apache.org/jira/browse/YARN-5963) | Spelling errors in logging and exceptions for node manager, client, web-proxy, common, and app history code |  Trivial | client, nodemanager | Grant Sohn | Grant Sohn |
+| [YARN-5921](https://issues.apache.org/jira/browse/YARN-5921) | Incorrect synchronization in RMContextImpl#setHAServiceState/getHAServiceState |  Major | . | Varun Saxena | Varun Saxena |
+| [HDFS-11140](https://issues.apache.org/jira/browse/HDFS-11140) | Directory Scanner should log startup message time correctly |  Minor | . | Xiao Chen | Yiqun Lin |
+| [HDFS-11223](https://issues.apache.org/jira/browse/HDFS-11223) | Fix typos in HttpFs documentations |  Trivial | documentation | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13867](https://issues.apache.org/jira/browse/HADOOP-13867) | FilterFileSystem should override rename(.., options) to take effect of Rename options called via FilterFileSystem implementations |  Major | . | Vinayakumar B | Vinayakumar B |
+| [HDFS-11197](https://issues.apache.org/jira/browse/HDFS-11197) | Listing encryption zones fails when deleting a EZ that is on a snapshotted directory |  Minor | hdfs | Wellington Chevreuil | Wellington Chevreuil |
+| [HDFS-11224](https://issues.apache.org/jira/browse/HDFS-11224) | Lifeline message should be ignored for dead nodes |  Critical | . | Vinayakumar B | Vinayakumar B |
+| [YARN-4752](https://issues.apache.org/jira/browse/YARN-4752) | FairScheduler should preempt for a ResourceRequest and all preempted containers should be on the same node |  Major | fairscheduler | Karthik Kambatla | Karthik Kambatla |
+| [HADOOP-13824](https://issues.apache.org/jira/browse/HADOOP-13824) | FsShell can suppress the real error if no error message is present |  Major | fs | Rob Vesse | John Zhuge |
+| [MAPREDUCE-6820](https://issues.apache.org/jira/browse/MAPREDUCE-6820) | Fix dead links in Job relevant classes |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HDFS-8870](https://issues.apache.org/jira/browse/HDFS-8870) | Lease is leaked on write failure |  Major | hdfs-client | Rushabh S Shah | Kuhu Shukla |
+| [HADOOP-13565](https://issues.apache.org/jira/browse/HADOOP-13565) | KerberosAuthenticationHandler#authenticate should not rebuild SPN based on client request |  Major | security | Xiaoyu Yao | Xiaoyu Yao |
+| [HDFS-11229](https://issues.apache.org/jira/browse/HDFS-11229) | HDFS-11056 failed to close meta file |  Blocker | datanode | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HDFS-11226](https://issues.apache.org/jira/browse/HDFS-11226) | cacheadmin,cryptoadmin and storagepolicyadmin should support generic options |  Minor | tools | Archana T | Brahma Reddy Battula |
+| [HDFS-11233](https://issues.apache.org/jira/browse/HDFS-11233) | Fix javac warnings related to the deprecated APIs after upgrading Jackson |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [MAPREDUCE-6821](https://issues.apache.org/jira/browse/MAPREDUCE-6821) | Fix javac warning related to the deprecated APIs after upgrading Jackson |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [HDFS-11164](https://issues.apache.org/jira/browse/HDFS-11164) | Mover should avoid unnecessary retries if the block is pinned |  Major | balancer & mover | Rakesh R | Rakesh R |
+| [HDFS-10684](https://issues.apache.org/jira/browse/HDFS-10684) | WebHDFS DataNode calls fail without parameter createparent |  Blocker | webhdfs | Samuel Low | John Zhuge |
+| [HDFS-11204](https://issues.apache.org/jira/browse/HDFS-11204) | Document the missing options of hdfs zkfc command |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13890](https://issues.apache.org/jira/browse/HADOOP-13890) | Maintain HTTP/host as SPNEGO SPN support and fix KerberosName parsing |  Major | test | Brahma Reddy Battula | Xiaoyu Yao |
+| [YARN-5999](https://issues.apache.org/jira/browse/YARN-5999) | AMRMClientAsync will stop if any exceptions thrown on allocate call |  Major | . | Jian He | Jian He |
+| [HADOOP-13831](https://issues.apache.org/jira/browse/HADOOP-13831) | Correct check for error code to detect Azure Storage Throttling and provide retries |  Major | fs/azure | Gaurav Kanade | Gaurav Kanade |
+| [HADOOP-13508](https://issues.apache.org/jira/browse/HADOOP-13508) | FsPermission string constructor does not recognize sticky bit |  Major | . | Atul Sikaria | Atul Sikaria |
+| [HDFS-11094](https://issues.apache.org/jira/browse/HDFS-11094) | Send back HAState along with NamespaceInfo during a versionRequest as an optional parameter |  Major | datanode | Eric Badger | Eric Badger |
+| [HDFS-11253](https://issues.apache.org/jira/browse/HDFS-11253) | FileInputStream leak on failure path in BlockSender |  Major | datanode | Arpit Agarwal | Arpit Agarwal |
+| [HDFS-9911](https://issues.apache.org/jira/browse/HDFS-9911) | TestDataNodeLifeline  Fails intermittently |  Major | datanode | Anu Engineer | Yiqun Lin |
+| [HDFS-11160](https://issues.apache.org/jira/browse/HDFS-11160) | VolumeScanner reports write-in-progress replicas as corrupt incorrectly |  Major | datanode | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HADOOP-13913](https://issues.apache.org/jira/browse/HADOOP-13913) | maven issuing pom.version being deprecation warnings |  Minor | build | Joe Pallas | Steve Loughran |
+| [YARN-4330](https://issues.apache.org/jira/browse/YARN-4330) | MiniYARNCluster is showing multiple  Failed to instantiate default resource calculator warning messages. |  Blocker | test, yarn | Steve Loughran | Varun Saxena |
+| [YARN-5877](https://issues.apache.org/jira/browse/YARN-5877) | Allow all env's from yarn.nodemanager.env-whitelist to get overridden during launch |  Major | . | Bibin A Chundatt | Bibin A Chundatt |
+| [HDFS-11263](https://issues.apache.org/jira/browse/HDFS-11263) | ClassCastException when we use Bzipcodec for Fsimage compression |  Critical | . | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-11195](https://issues.apache.org/jira/browse/HDFS-11195) | Return error when appending files by webhdfs rest api fails |  Major | . | Yuanbo Liu | Yuanbo Liu |
+| [HDFS-11247](https://issues.apache.org/jira/browse/HDFS-11247) | Add a test to verify NameNodeMXBean#getDecomNodes() and Live/Dead Decom Nodes shown in NameNode WebUI |  Major | . | Manoj Govindassamy | Manoj Govindassamy |
+| [HDFS-11261](https://issues.apache.org/jira/browse/HDFS-11261) | Document missing NameNode metrics |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [YARN-5903](https://issues.apache.org/jira/browse/YARN-5903) | Fix race condition in TestResourceManagerAdministrationProtocolPBClientImpl beforeclass setup method |  Major | yarn | Haibo Chen | Haibo Chen |
+| [YARN-5774](https://issues.apache.org/jira/browse/YARN-5774) | MR Job stuck in ACCEPTED status without any progress in Fair Scheduler if set yarn.scheduler.minimum-allocation-mb to 0. |  Blocker | resourcemanager | Yufei Gu | Yufei Gu |
+| [HDFS-11258](https://issues.apache.org/jira/browse/HDFS-11258) | File mtime change could not save to editlog |  Critical | . | Jimmy Xiang | Jimmy Xiang |
+| [MAPREDUCE-6704](https://issues.apache.org/jira/browse/MAPREDUCE-6704) | Update the documents to run MapReduce application |  Blocker | documentation | Bibin A Chundatt | Bibin A Chundatt |
+| [YARN-6000](https://issues.apache.org/jira/browse/YARN-6000) | Make AllocationFileLoaderService.Listener public |  Major | fairscheduler, yarn | Tao Jie | Tao Jie |
+| [HDFS-11271](https://issues.apache.org/jira/browse/HDFS-11271) | Typo in NameNode UI |  Trivial | namenode, ui | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HDFS-11250](https://issues.apache.org/jira/browse/HDFS-11250) | Fix a typo in ReplicaUnderRecovery#setRecoveryID |  Trivial | . | Yiqun Lin | Yiqun Lin |
+| [YARN-6026](https://issues.apache.org/jira/browse/YARN-6026) | A couple of spelling errors in the docs |  Trivial | documentation | Grant Sohn | Grant Sohn |
+| [HADOOP-13940](https://issues.apache.org/jira/browse/HADOOP-13940) | Document the missing envvars commands |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13943](https://issues.apache.org/jira/browse/HADOOP-13943) | TestCommonConfigurationFields#testCompareXmlAgainstConfigurationClass fails after HADOOP-13863 |  Major | test | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-11270](https://issues.apache.org/jira/browse/HDFS-11270) | Document the missing options of NameNode bootstrap command |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13932](https://issues.apache.org/jira/browse/HADOOP-13932) | Fix indefinite article in comments |  Minor | . | LiXin Ge | LiXin Ge |
+| [YARN-5962](https://issues.apache.org/jira/browse/YARN-5962) | Spelling errors in logging and exceptions for resource manager code |  Trivial | resourcemanager | Grant Sohn | Grant Sohn |
+| [YARN-5257](https://issues.apache.org/jira/browse/YARN-5257) | Fix unreleased resources and null dereferences |  Major | . | Yufei Gu | Yufei Gu |
+| [HDFS-11252](https://issues.apache.org/jira/browse/HDFS-11252) | TestFileTruncate#testTruncateWithDataNodesRestartImmediately can fail with BindException |  Major | . | Jason Lowe | Yiqun Lin |
+| [YARN-6001](https://issues.apache.org/jira/browse/YARN-6001) | Improve moveApplicationQueues command line |  Major | client | Sunil G | Sunil G |
+| [YARN-6024](https://issues.apache.org/jira/browse/YARN-6024) | Capacity Scheduler 'continuous reservation looking' doesn't work when sum of queue's used and reserved resources is equal to max |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-4882](https://issues.apache.org/jira/browse/YARN-4882) | Change the log level to DEBUG for recovering completed applications |  Major | resourcemanager | Rohith Sharma K S | Daniel Templeton |
+| [HDFS-11251](https://issues.apache.org/jira/browse/HDFS-11251) | ConcurrentModificationException during DataNode#refreshVolumes |  Major | . | Jason Lowe | Manoj Govindassamy |
+| [HDFS-11267](https://issues.apache.org/jira/browse/HDFS-11267) | Avoid redefinition of storageDirs in NNStorage and cleanup its accessors in Storage |  Major | . | Manoj Govindassamy | Manoj Govindassamy |
+| [MAPREDUCE-5155](https://issues.apache.org/jira/browse/MAPREDUCE-5155) | Race condition in test case TestFetchFailure cause it to fail |  Minor | test | Nemon Lou | Haibo Chen |
+| [HADOOP-13942](https://issues.apache.org/jira/browse/HADOOP-13942) | Build failure due to errors of javadoc build in hadoop-azure |  Major | fs/azure | Kai Sasaki | Kai Sasaki |
+| [HADOOP-13883](https://issues.apache.org/jira/browse/HADOOP-13883) | Add description of -fs option in generic command usage |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13922](https://issues.apache.org/jira/browse/HADOOP-13922) | Some modules have dependencies on hadoop-client jar removed by HADOOP-11804 |  Blocker | build | Joe Pallas | Sean Busbey |
+| [HADOOP-12733](https://issues.apache.org/jira/browse/HADOOP-12733) | Remove references to obsolete io.seqfile configuration variables |  Minor | . | Ray Chiang | Ray Chiang |
+| [YARN-5988](https://issues.apache.org/jira/browse/YARN-5988) | RM unable to start in secure setup |  Blocker | . | Ajith S | Ajith S |
+| [HDFS-11280](https://issues.apache.org/jira/browse/HDFS-11280) | Allow WebHDFS to reuse HTTP connections to NN |  Major | hdfs | Zheng Shao | Zheng Shao |
+| [HADOOP-13896](https://issues.apache.org/jira/browse/HADOOP-13896) | Invoke assembly plugin after building jars |  Blocker | build | Allen Wittenauer | Andrew Wang |
+| [HADOOP-13780](https://issues.apache.org/jira/browse/HADOOP-13780) | LICENSE/NOTICE are out of date for source artifacts |  Blocker | common | Sean Busbey | Xiao Chen |
+| [MAPREDUCE-6715](https://issues.apache.org/jira/browse/MAPREDUCE-6715) | Fix Several Unsafe Practices |  Major | . | Yufei Gu | Yufei Gu |
+| [HDFS-11282](https://issues.apache.org/jira/browse/HDFS-11282) | Document the missing metrics of DataNode Volume IO operations |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [MAPREDUCE-6711](https://issues.apache.org/jira/browse/MAPREDUCE-6711) | JobImpl fails to handle preemption events on state COMMITTING |  Major | . | Li Lu | Prabhu Joseph |
+| [YARN-6066](https://issues.apache.org/jira/browse/YARN-6066) | Opportunistic containers minor fixes: API annotations and config parameter changes |  Minor | . | Arun Suresh | Arun Suresh |
+| [HADOOP-13958](https://issues.apache.org/jira/browse/HADOOP-13958) | Bump up release year to 2017 |  Blocker | . | Junping Du | Junping Du |
+| [YARN-6068](https://issues.apache.org/jira/browse/YARN-6068) | Log aggregation get failed when NM restart even with recovery |  Blocker | . | Junping Du | Junping Du |
+| [HDFS-11301](https://issues.apache.org/jira/browse/HDFS-11301) | Double wrapping over RandomAccessFile in LocalReplicaInPipeline#createStreams |  Minor | hdfs | Hanisha Koneru | Hanisha Koneru |
+| [YARN-6073](https://issues.apache.org/jira/browse/YARN-6073) | Misuse of format specifier in Preconditions.checkArgument |  Trivial | . | Yongjun Zhang | Yuanbo Liu |
+| [YARN-5899](https://issues.apache.org/jira/browse/YARN-5899) | Debug log in AbstractCSQueue#canAssignToThisQueue needs improvement |  Trivial | capacity scheduler | Ying Zhang | Ying Zhang |
+| [YARN-6054](https://issues.apache.org/jira/browse/YARN-6054) | TimelineServer fails to start when some LevelDb state files are missing. |  Major | . | Ravi Prakash | Ravi Prakash |
+| [YARN-5937](https://issues.apache.org/jira/browse/YARN-5937) | stop-yarn.sh is not able to gracefully stop node managers |  Major | . | Weiwei Yang | Weiwei Yang |
+| [YARN-6022](https://issues.apache.org/jira/browse/YARN-6022) | Revert changes of AbstractResourceRequest |  Blocker | . | Wangda Tan | Wangda Tan |
+| [YARN-4148](https://issues.apache.org/jira/browse/YARN-4148) | When killing app, RM releases app's resource before they are released by NM |  Major | resourcemanager | Jun Gong | Jason Lowe |
+| [YARN-6079](https://issues.apache.org/jira/browse/YARN-6079) | simple spelling errors in yarn test code |  Trivial | test | Grant Sohn | vijay |
+| [HADOOP-13903](https://issues.apache.org/jira/browse/HADOOP-13903) | Improvements to KMS logging to help debug authorization errors |  Minor | kms | Tristan Stevens | Tristan Stevens |
+| [HDFS-9935](https://issues.apache.org/jira/browse/HDFS-9935) | Remove LEASE\_{SOFTLIMIT,HARDLIMIT}\_PERIOD and unused import from HdfsServerConstants |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [YARN-5554](https://issues.apache.org/jira/browse/YARN-5554) | MoveApplicationAcrossQueues does not check user permission on the target queue |  Major | resourcemanager | Haibo Chen | Wilfred Spiegelenburg |
+| [HDFS-11312](https://issues.apache.org/jira/browse/HDFS-11312) | Fix incompatible tag number change for nonDfsUsed in DatanodeInfoProto |  Blocker | . | Sean Mackrory | Sean Mackrory |
+| [HADOOP-13961](https://issues.apache.org/jira/browse/HADOOP-13961) | Fix compilation failure from missing hadoop-kms test jar |  Blocker | build | Karthik Kambatla | Andrew Wang |
+| [YARN-6072](https://issues.apache.org/jira/browse/YARN-6072) | RM unable to start in secure mode |  Blocker | resourcemanager | Bibin A Chundatt | Ajith S |
+| [YARN-6081](https://issues.apache.org/jira/browse/YARN-6081) | LeafQueue#getTotalPendingResourcesConsideringUserLimit should deduct reserved from pending to avoid unnecessary preemption of reserved container |  Critical | . | Wangda Tan | Wangda Tan |
+| [HDFS-11344](https://issues.apache.org/jira/browse/HDFS-11344) | The default value of the setting dfs.disk.balancer.block.tolerance.percent is different |  Trivial | diskbalancer | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13928](https://issues.apache.org/jira/browse/HADOOP-13928) | TestAdlFileContextMainOperationsLive.testGetFileContext1 runtime error |  Major | fs/adl, test | John Zhuge | John Zhuge |
+| [HDFS-11342](https://issues.apache.org/jira/browse/HDFS-11342) | Fix FileInputStream leak in loadLastPartialChunkChecksum |  Major | datanode | Arpit Agarwal | Chen Liang |
+| [HDFS-11307](https://issues.apache.org/jira/browse/HDFS-11307) | The rpc to portmap service for NFS has hardcoded timeout. |  Major | . | Jitendra Nath Pandey | Mukul Kumar Singh |
+| [YARN-6057](https://issues.apache.org/jira/browse/YARN-6057) | yarn.scheduler.minimum-allocation-\* descriptions are incorrect about behavior when a request is out of bounds |  Minor | . | Bibin A Chundatt | Julia Sommer |
+| [HADOOP-13976](https://issues.apache.org/jira/browse/HADOOP-13976) | Path globbing does not match newlines |  Major | . | Eric Badger | Eric Badger |
+| [HDFS-11209](https://issues.apache.org/jira/browse/HDFS-11209) | SNN can't checkpoint when rolling upgrade is not finalized |  Critical | rolling upgrades | Xiaoyu Yao | Xiaoyu Yao |
+| [YARN-6016](https://issues.apache.org/jira/browse/YARN-6016) | Fix minor bugs in handling of local AMRMToken in AMRMProxy |  Minor | federation | Botong Huang | Botong Huang |
+| [HDFS-10733](https://issues.apache.org/jira/browse/HDFS-10733) | NameNode terminated after full GC thinking QJM is unresponsive. |  Major | namenode, qjm | Konstantin Shvachko | Vinitha Reddy Gankidi |
+| [HDFS-10759](https://issues.apache.org/jira/browse/HDFS-10759) | Change fsimage bool isStriped from boolean to an enum |  Major | hdfs | Ewan Higgs | Ewan Higgs |
+| [HADOOP-13996](https://issues.apache.org/jira/browse/HADOOP-13996) | Fix some release build issues |  Blocker | build | Andrew Wang | Andrew Wang |
+| [HADOOP-13965](https://issues.apache.org/jira/browse/HADOOP-13965) | Groups should be consistent in using default group mapping class |  Minor | security | Yiqun Lin | Yiqun Lin |
+| [HDFS-11316](https://issues.apache.org/jira/browse/HDFS-11316) | TestDataNodeVolumeFailure#testUnderReplicationAfterVolFailure fails in trunk |  Minor | . | Yiqun Lin | Yiqun Lin |
+| [HDFS-11287](https://issues.apache.org/jira/browse/HDFS-11287) | Storage class member storageDirs should be private to avoid unprotected access by derived classes |  Major | . | Manoj Govindassamy | Manoj Govindassamy |
+| [HDFS-11268](https://issues.apache.org/jira/browse/HDFS-11268) | Correctly reconstruct erasure coding file from FSImage |  Critical | erasure-coding | SammiChen | SammiChen |
+| [HADOOP-14001](https://issues.apache.org/jira/browse/HADOOP-14001) | Improve delegation token validity checking |  Major | . | Akira Ajisaka | Akira Ajisaka |
+| [YARN-6110](https://issues.apache.org/jira/browse/YARN-6110) | Fix opportunistic containers documentation |  Minor | documentation | Akira Ajisaka | Akira Ajisaka |
+| [YARN-6104](https://issues.apache.org/jira/browse/YARN-6104) | RegistrySecurity overrides zookeeper sasl system properties |  Major | . | Billie Rinaldi | Billie Rinaldi |
+| [HADOOP-14004](https://issues.apache.org/jira/browse/HADOOP-14004) | Missing hadoop-cloud-storage-project module in pom.xml |  Critical | build | Akira Ajisaka | Akira Ajisaka |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [YARN-5608](https://issues.apache.org/jira/browse/YARN-5608) | TestAMRMClient.setup() fails with ArrayOutOfBoundsException |  Major | test | Daniel Templeton | Daniel Templeton |
+| [HDFS-10657](https://issues.apache.org/jira/browse/HDFS-10657) | testAclCLI.xml setfacl test should expect mask r-x |  Minor | . | John Zhuge | John Zhuge |
+| [YARN-5656](https://issues.apache.org/jira/browse/YARN-5656) | Fix ReservationACLsTestBase |  Major | . | Sean Po | Sean Po |
+| [HDFS-9333](https://issues.apache.org/jira/browse/HDFS-9333) | Some tests using MiniDFSCluster errored complaining port in use |  Minor | test | Kai Zheng | Masatake Iwasaki |
+| [HADOOP-13686](https://issues.apache.org/jira/browse/HADOOP-13686) | Adding additional unit test for Trash (I) |  Major | . | Xiaoyu Yao | Weiwei Yang |
+| [YARN-4555](https://issues.apache.org/jira/browse/YARN-4555) | TestDefaultContainerExecutor#testContainerLaunchError fails on non-english locale environment |  Minor | nodemanager, test | Takashi Ohnishi | Takashi Ohnishi |
+| [YARN-4363](https://issues.apache.org/jira/browse/YARN-4363) | In TestFairScheduler, testcase should not create FairScheduler redundantly |  Trivial | fairscheduler | Tao Jie | Tao Jie |
+| [YARN-3568](https://issues.apache.org/jira/browse/YARN-3568) | TestAMRMTokens should use some random port |  Major | test | Gera Shegalov | Takashi Ohnishi |
+| [YARN-3460](https://issues.apache.org/jira/browse/YARN-3460) | TestSecureRMRegistryOperations fails with IBM\_JAVA |  Major | . | pascal oliva | pascal oliva |
+| [MAPREDUCE-6804](https://issues.apache.org/jira/browse/MAPREDUCE-6804) | Add timeout when starting JobHistoryServer in MiniMRYarnCluster |  Minor | test | Andras Bokor | Andras Bokor |
+| [MAPREDUCE-6743](https://issues.apache.org/jira/browse/MAPREDUCE-6743) | nativetask unit tests need to provide usable output; fix link errors during mvn test |  Major | nativetask | Allen Wittenauer | Allen Wittenauer |
+| [HDFS-11272](https://issues.apache.org/jira/browse/HDFS-11272) | Refine the assert messages in TestFSDirAttrOp |  Minor | test | Akira Ajisaka | Jimmy Xiang |
+| [HDFS-11278](https://issues.apache.org/jira/browse/HDFS-11278) | Add missing @Test annotation for TestSafeMode.testSafeModeUtils() |  Trivial | namenode | Lukas Majercak | Lukas Majercak |
+| [MAPREDUCE-6831](https://issues.apache.org/jira/browse/MAPREDUCE-6831) | Flaky test TestJobImpl.testKilledDuringKillAbort |  Major | mrv2 | Peter Bacsko | Peter Bacsko |
+| [HDFS-11290](https://issues.apache.org/jira/browse/HDFS-11290) | TestFSNameSystemMBean should wait until JMX cache is cleared |  Major | test | Akira Ajisaka | Erik Krogen |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [YARN-4733](https://issues.apache.org/jira/browse/YARN-4733) | [YARN-3368] Initial commit of new YARN web UI |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-4517](https://issues.apache.org/jira/browse/YARN-4517) | [YARN-3368] Add nodes page |  Major | yarn | Wangda Tan | Varun Saxena |
+| [YARN-4514](https://issues.apache.org/jira/browse/YARN-4514) | [YARN-3368] Cleanup hardcoded configurations, such as RM/ATS addresses |  Major | . | Wangda Tan | Sunil G |
+| [YARN-5019](https://issues.apache.org/jira/browse/YARN-5019) | [YARN-3368] Change urls in new YARN ui from camel casing to hyphens |  Major | . | Varun Vasudev | Sunil G |
+| [YARN-5000](https://issues.apache.org/jira/browse/YARN-5000) | [YARN-3368] App attempt page is not loading when timeline server is not started |  Major | . | Sunil G | Sunil G |
+| [YARN-5038](https://issues.apache.org/jira/browse/YARN-5038) | [YARN-3368] Application and Container pages shows wrong values when RM is stopped |  Major | . | Sunil G | Sunil G |
+| [YARN-4515](https://issues.apache.org/jira/browse/YARN-4515) | [YARN-3368] Support hosting web UI framework inside YARN RM |  Major | . | Wangda Tan | Sunil G |
+| [YARN-5183](https://issues.apache.org/jira/browse/YARN-5183) | [YARN-3368] Support for responsive navbar when window is resized |  Major | . | Kai Sasaki | Kai Sasaki |
+| [YARN-5161](https://issues.apache.org/jira/browse/YARN-5161) | [YARN-3368] Add Apache Hadoop logo in YarnUI home page |  Major | webapp | Sunil G | Kai Sasaki |
+| [YARN-5344](https://issues.apache.org/jira/browse/YARN-5344) | [YARN-3368] Generic UI improvements |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [YARN-5345](https://issues.apache.org/jira/browse/YARN-5345) | [YARN-3368] Cluster overview page improvements |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [YARN-5346](https://issues.apache.org/jira/browse/YARN-5346) | [YARN-3368] Queues page improvements |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [YARN-5347](https://issues.apache.org/jira/browse/YARN-5347) | [YARN-3368] Applications page improvements |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [YARN-5348](https://issues.apache.org/jira/browse/YARN-5348) | [YARN-3368] Node details page improvements |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [YARN-5321](https://issues.apache.org/jira/browse/YARN-5321) | [YARN-3368] Add resource usage for application by node managers |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-5322](https://issues.apache.org/jira/browse/YARN-5322) | [YARN-3368] Add a node heat chart map |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-5334](https://issues.apache.org/jira/browse/YARN-5334) | [YARN-3368] Introduce REFRESH button in various UI pages |  Major | webapp | Sunil G | Sreenath Somarajapuram |
+| [YARN-5509](https://issues.apache.org/jira/browse/YARN-5509) | Build error due to preparing 3.0.0-alpha2 deployment |  Major | yarn | Kai Sasaki | Kai Sasaki |
+| [YARN-5488](https://issues.apache.org/jira/browse/YARN-5488) | Applications table overflows beyond the page boundary |  Major | . | Harish Jaiprakash | Harish Jaiprakash |
+| [YARN-5504](https://issues.apache.org/jira/browse/YARN-5504) | [YARN-3368] Fix YARN UI build pom.xml |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [HADOOP-13355](https://issues.apache.org/jira/browse/HADOOP-13355) | Handle HADOOP\_CLIENT\_OPTS in a function |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [YARN-5583](https://issues.apache.org/jira/browse/YARN-5583) | [YARN-3368] Fix wrong paths in .gitignore |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [HADOOP-13554](https://issues.apache.org/jira/browse/HADOOP-13554) | Add an equivalent of hadoop\_subcmd\_opts for secure opts |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [YARN-5503](https://issues.apache.org/jira/browse/YARN-5503) | [YARN-3368] Add missing hidden files in webapp folder for deployment |  Major | . | Sreenath Somarajapuram | Sreenath Somarajapuram |
+| [HADOOP-13562](https://issues.apache.org/jira/browse/HADOOP-13562) | Change hadoop\_subcommand\_opts to use only uppercase |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HADOOP-13358](https://issues.apache.org/jira/browse/HADOOP-13358) | Modify HDFS to use hadoop\_subcommand\_opts |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HADOOP-13356](https://issues.apache.org/jira/browse/HADOOP-13356) | Add a function to handle command\_subcommand\_OPTS |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HADOOP-13357](https://issues.apache.org/jira/browse/HADOOP-13357) | Modify common to use hadoop\_subcommand\_opts |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HADOOP-13359](https://issues.apache.org/jira/browse/HADOOP-13359) | Modify YARN to use hadoop\_subcommand\_opts |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HDFS-9392](https://issues.apache.org/jira/browse/HDFS-9392) | Admins support for maintenance state |  Major | . | Ming Ma | Ming Ma |
+| [HADOOP-13564](https://issues.apache.org/jira/browse/HADOOP-13564) | modify mapred to use hadoop\_subcommand\_opts |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HDFS-10813](https://issues.apache.org/jira/browse/HDFS-10813) | DiskBalancer: Add the getNodeList method in Command |  Minor | balancer & mover | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13563](https://issues.apache.org/jira/browse/HADOOP-13563) | hadoop\_subcommand\_opts should print name not actual content during debug |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [HADOOP-13360](https://issues.apache.org/jira/browse/HADOOP-13360) | Documentation for HADOOP\_subcommand\_OPTS |  Major | scripts | Allen Wittenauer | Allen Wittenauer |
+| [YARN-5596](https://issues.apache.org/jira/browse/YARN-5596) | Fix failing unit test in TestDockerContainerRuntime |  Minor | nodemanager, yarn | Sidharta Seethana | Sidharta Seethana |
+| [HADOOP-13547](https://issues.apache.org/jira/browse/HADOOP-13547) | Optimize IPC client protobuf decoding |  Major | . | Daryn Sharp | Daryn Sharp |
+| [YARN-5264](https://issues.apache.org/jira/browse/YARN-5264) | Store all queue-specific information in FSQueue |  Major | fairscheduler | Yufei Gu | Yufei Gu |
+| [YARN-5576](https://issues.apache.org/jira/browse/YARN-5576) | Allow resource localization while container is running |  Major | . | Jian He | Jian He |
+| [HADOOP-13549](https://issues.apache.org/jira/browse/HADOOP-13549) | Eliminate intermediate buffer for server-side PB encoding |  Major | ipc | Daryn Sharp | Daryn Sharp |
+| [HADOOP-13447](https://issues.apache.org/jira/browse/HADOOP-13447) | Refactor S3AFileSystem to support introduction of separate metadata repository and tests. |  Major | fs/s3 | Chris Nauroth | Chris Nauroth |
+| [YARN-5598](https://issues.apache.org/jira/browse/YARN-5598) | [YARN-3368] Fix create-release to be able to generate bits for the new yarn-ui |  Major | yarn, yarn-ui-v2 | Wangda Tan | Wangda Tan |
+| [HDFS-9847](https://issues.apache.org/jira/browse/HDFS-9847) | HDFS configuration should accept time units |  Major | . | Yiqun Lin | Yiqun Lin |
+| [HADOOP-13541](https://issues.apache.org/jira/browse/HADOOP-13541) | explicitly declare the Joda time version S3A depends on |  Minor | build, fs/s3 | Steve Loughran | Steve Loughran |
+| [HDFS-8901](https://issues.apache.org/jira/browse/HDFS-8901) | Use ByteBuffer in striping positional read |  Major | erasure-coding | Kai Zheng | SammiChen |
+| [HDFS-10845](https://issues.apache.org/jira/browse/HDFS-10845) | Change defaults in hdfs-site.xml to match timeunit type |  Minor | datanode, namenode | Yiqun Lin | Yiqun Lin |
+| [HDFS-10553](https://issues.apache.org/jira/browse/HDFS-10553) | DiskBalancer: Rename Tools/DiskBalancer class to Tools/DiskBalancerCLI |  Minor | balancer & mover | Anu Engineer | Manoj Govindassamy |
+| [HDFS-9849](https://issues.apache.org/jira/browse/HDFS-9849) | DiskBalancer : reduce lock path in shutdown code |  Major | balancer & mover | Anu Engineer | Yuanbo Liu |
+| [YARN-5566](https://issues.apache.org/jira/browse/YARN-5566) | Client-side NM graceful decom is not triggered when jobs finish |  Major | nodemanager | Robert Kanter | Robert Kanter |
+| [HADOOP-10940](https://issues.apache.org/jira/browse/HADOOP-10940) | RPC client does no bounds checking of responses |  Critical | ipc | Daryn Sharp | Daryn Sharp |
+| [HADOOP-13540](https://issues.apache.org/jira/browse/HADOOP-13540) | improve section on troubleshooting s3a auth problems |  Minor | documentation, fs/s3 | Steve Loughran | Steve Loughran |
+| [HDFS-10808](https://issues.apache.org/jira/browse/HDFS-10808) | DiskBalancer does not execute multi-steps plan-redux |  Major | balancer & mover | Anu Engineer | Anu Engineer |
+| [HDFS-10821](https://issues.apache.org/jira/browse/HDFS-10821) | DiskBalancer: Report command support with multiple nodes |  Major | balancer & mover | Yiqun Lin | Yiqun Lin |
+| [HDFS-10858](https://issues.apache.org/jira/browse/HDFS-10858) | FBR processing may generate incorrect reportedBlock-blockGroup mapping |  Blocker | erasure-coding | Jing Zhao | Jing Zhao |
+| [HDFS-10599](https://issues.apache.org/jira/browse/HDFS-10599) | DiskBalancer: Execute CLI via Shell |  Major | balancer & mover | Anu Engineer | Manoj Govindassamy |
+| [HADOOP-13546](https://issues.apache.org/jira/browse/HADOOP-13546) | Override equals and hashCode to avoid connection leakage |  Major | ipc | Xiaobing Zhou | Xiaobing Zhou |
+| [HDFS-10562](https://issues.apache.org/jira/browse/HDFS-10562) | DiskBalancer: update documentation on how to report issues and debug |  Minor | balancer & mover | Anu Engineer | Anu Engineer |
+| [HDFS-10805](https://issues.apache.org/jira/browse/HDFS-10805) | Reduce runtime for append test |  Minor | test | Gergely Novák | Gergely Novák |
+| [YARN-5620](https://issues.apache.org/jira/browse/YARN-5620) | Core changes in NodeManager to support re-initialization of Containers with new launchContext |  Major | . | Arun Suresh | Arun Suresh |
+| [HADOOP-13621](https://issues.apache.org/jira/browse/HADOOP-13621) | s3:// should have been fully cut off from trunk |  Major | documentation, fs/s3 | Mingliang Liu | Mingliang Liu |
+| [YARN-5637](https://issues.apache.org/jira/browse/YARN-5637) | Changes in NodeManager to support Container rollback and commit |  Major | . | Arun Suresh | Arun Suresh |
+| [YARN-3140](https://issues.apache.org/jira/browse/YARN-3140) | Improve locks in AbstractCSQueue/LeafQueue/ParentQueue |  Major | resourcemanager, scheduler | Wangda Tan | Wangda Tan |
+| [YARN-3141](https://issues.apache.org/jira/browse/YARN-3141) | Improve locks in SchedulerApplicationAttempt/FSAppAttempt/FiCaSchedulerApp |  Major | resourcemanager, scheduler | Wangda Tan | Wangda Tan |
+| [HDFS-10871](https://issues.apache.org/jira/browse/HDFS-10871) | DiskBalancerWorkItem should not import jackson relocated by htrace |  Major | hdfs-client | Masatake Iwasaki | Manoj Govindassamy |
+| [YARN-5609](https://issues.apache.org/jira/browse/YARN-5609) | Expose upgrade and restart API in ContainerManagementProtocol |  Major | . | Arun Suresh | Arun Suresh |
+| [HDFS-9895](https://issues.apache.org/jira/browse/HDFS-9895) | Remove unnecessary conf cache from DataNode |  Major | datanode | Xiaobing Zhou | Xiaobing Zhou |
+| [HADOOP-13544](https://issues.apache.org/jira/browse/HADOOP-13544) | JDiff reports unncessarily show unannotated APIs and cause confusion while our javadocs only show annotated and public APIs |  Blocker | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
+| [YARN-3142](https://issues.apache.org/jira/browse/YARN-3142) | Improve locks in AppSchedulingInfo |  Major | resourcemanager, scheduler | Wangda Tan | Varun Saxena |
+| [HDFS-10900](https://issues.apache.org/jira/browse/HDFS-10900) | DiskBalancer: Complete the documents for the report command |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HDFS-9850](https://issues.apache.org/jira/browse/HDFS-9850) | DiskBalancer : Explore removing references to FsVolumeSpi |  Major | balancer & mover | Anu Engineer | Manoj Govindassamy |
+| [HDFS-10779](https://issues.apache.org/jira/browse/HDFS-10779) | Rename does not need to re-solve destination |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [HDFS-10892](https://issues.apache.org/jira/browse/HDFS-10892) | Add unit tests for HDFS command 'dfs -tail' and 'dfs -stat' |  Major | fs, shell, test | Mingliang Liu | Mingliang Liu |
+| [HADOOP-13599](https://issues.apache.org/jira/browse/HADOOP-13599) | s3a close() to be non-synchronized, so avoid risk of deadlock on shutdown |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [YARN-4205](https://issues.apache.org/jira/browse/YARN-4205) | Add a service for monitoring application life time out |  Major | scheduler | nijel | Rohith Sharma K S |
+| [YARN-5486](https://issues.apache.org/jira/browse/YARN-5486) | Update OpportunisticContainerAllocatorAMService::allocate method to handle OPPORTUNISTIC container requests |  Major | resourcemanager | Arun Suresh | Konstantinos Karanasos |
+| [HADOOP-12974](https://issues.apache.org/jira/browse/HADOOP-12974) | Create a CachingGetSpaceUsed implementation that uses df |  Major | . | Elliott Clark | Elliott Clark |
+| [HDFS-10851](https://issues.apache.org/jira/browse/HDFS-10851) | FSDirStatAndListingOp: stop passing path as string |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [YARN-5384](https://issues.apache.org/jira/browse/YARN-5384) | Expose priority in ReservationSystem submission APIs |  Major | capacity scheduler, fairscheduler, resourcemanager | Sean Po | Sean Po |
+| [HDFS-10619](https://issues.apache.org/jira/browse/HDFS-10619) | Cache path in InodesInPath |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [HDFS-10934](https://issues.apache.org/jira/browse/HDFS-10934) | TestDFSShell.testStat fails intermittently |  Major | test | Eric Badger | Eric Badger |
+| [YARN-5682](https://issues.apache.org/jira/browse/YARN-5682) | [YARN-3368] Fix maven build to keep all generated or downloaded files in target folder |  Major | . | Wangda Tan | Wangda Tan |
+| [HADOOP-13674](https://issues.apache.org/jira/browse/HADOOP-13674) | S3A can provide a more detailed error message when accessing a bucket through an incorrect S3 endpoint. |  Minor | fs/s3 | Chris Nauroth | Chris Nauroth |
+| [HDFS-10956](https://issues.apache.org/jira/browse/HDFS-10956) | Remove rename/delete performance penalty when not using snapshots |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [HDFS-10896](https://issues.apache.org/jira/browse/HDFS-10896) | Move lock logging logic from FSNamesystem into FSNamesystemLock |  Major | namenode | Erik Krogen | Erik Krogen |
+| [YARN-5702](https://issues.apache.org/jira/browse/YARN-5702) | Refactor TestPBImplRecords so that we can reuse for testing protocol records in other YARN modules |  Major | . | Subru Krishnan | Subru Krishnan |
+| [YARN-3139](https://issues.apache.org/jira/browse/YARN-3139) | Improve locks in AbstractYarnScheduler/CapacityScheduler/FairScheduler |  Major | resourcemanager, scheduler | Wangda Tan | Wangda Tan |
+| [HDFS-10893](https://issues.apache.org/jira/browse/HDFS-10893) | Refactor TestDFSShell by setting up MiniDFSCluser once for all commands test |  Major | test | Mingliang Liu | Mingliang Liu |
+| [HDFS-10955](https://issues.apache.org/jira/browse/HDFS-10955) | Pass IIP for FSDirAttr methods |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [HDFS-10826](https://issues.apache.org/jira/browse/HDFS-10826) | Correctly report missing EC blocks in FSCK |  Major | erasure-coding | Takanobu Asanuma | Takanobu Asanuma |
+| [HADOOP-12977](https://issues.apache.org/jira/browse/HADOOP-12977) | s3a to handle delete("/", true) robustly |  Minor | fs/s3 | Steve Loughran | Steve Loughran |
+| [HDFS-10939](https://issues.apache.org/jira/browse/HDFS-10939) | Reduce performance penalty of encryption zones |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [HADOOP-13692](https://issues.apache.org/jira/browse/HADOOP-13692) | hadoop-aws should declare explicit dependency on Jackson 2 jars to prevent classpath conflicts. |  Minor | fs/s3 | Chris Nauroth | Chris Nauroth |
+| [HDFS-10979](https://issues.apache.org/jira/browse/HDFS-10979) | Pass IIP for FSDirDeleteOp methods |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [HADOOP-13627](https://issues.apache.org/jira/browse/HADOOP-13627) | Have an explicit KerberosAuthException for UGI to throw, text from public constants |  Major | security | Steve Loughran | Xiao Chen |
+| [HDFS-10980](https://issues.apache.org/jira/browse/HDFS-10980) | Optimize check for existence of parent directory |  Major | hdfs | Daryn Sharp | Daryn Sharp |
+| [HDFS-10968](https://issues.apache.org/jira/browse/HDFS-10968) | BlockManager#isInNewRack should consider decommissioning nodes |  Major | erasure-coding, namenode | Jing Zhao | Jing Zhao |
+| [HDFS-10988](https://issues.apache.org/jira/browse/HDFS-10988) | Refactor TestBalancerBandwidth |  Major | balancer & mover, test | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HDFS-10985](https://issues.apache.org/jira/browse/HDFS-10985) | o.a.h.ha.TestZKFailoverController should not use fixed time sleep before assertions |  Minor | ha, test | Mingliang Liu | Mingliang Liu |
+| [HDFS-10972](https://issues.apache.org/jira/browse/HDFS-10972) | Add unit test for HDFS command 'dfsadmin -getDatanodeInfo' |  Major | fs, shell, test | Xiaobing Zhou | Xiaobing Zhou |
+| [HDFS-10965](https://issues.apache.org/jira/browse/HDFS-10965) | Add unit test for HDFS command 'dfsadmin -printTopology' |  Major | fs, shell, test | Xiaobing Zhou | Xiaobing Zhou |
+| [YARN-5698](https://issues.apache.org/jira/browse/YARN-5698) | [YARN-3368] Launch new YARN UI under hadoop web app port |  Major | . | Sunil G | Sunil G |
+| [HDFS-10949](https://issues.apache.org/jira/browse/HDFS-10949) | DiskBalancer: deprecate TestDiskBalancer#setVolumeCapacity |  Minor | balancer & mover | Xiaobing Zhou | Xiaobing Zhou |
+| [HADOOP-13417](https://issues.apache.org/jira/browse/HADOOP-13417) | Fix javac and checkstyle warnings in hadoop-auth package |  Major | . | Kai Sasaki | Kai Sasaki |
+| [HDFS-10827](https://issues.apache.org/jira/browse/HDFS-10827) | When there are unrecoverable ec block groups, Namenode Web UI shows "There are X missing blocks." but doesn't show the block names. |  Major | erasure-coding | Takanobu Asanuma | Takanobu Asanuma |
+| [HDFS-11008](https://issues.apache.org/jira/browse/HDFS-11008) | Change unit test for testing parsing "-source" parameter in Balancer CLI |  Major | test | Mingliang Liu | Mingliang Liu |
+| [HDFS-10558](https://issues.apache.org/jira/browse/HDFS-10558) | DiskBalancer: Print the full path to  plan file |  Minor | balancer & mover | Anu Engineer | Xiaobing Zhou |
+| [YARN-5699](https://issues.apache.org/jira/browse/YARN-5699) | Retrospect yarn entity fields which are publishing in events info fields. |  Major | . | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-5145](https://issues.apache.org/jira/browse/YARN-5145) | [YARN-3368] Move new YARN UI configuration to HADOOP\_CONF\_DIR |  Major | . | Wangda Tan | Sunil G |
+| [HDFS-11013](https://issues.apache.org/jira/browse/HDFS-11013) | Correct typos in native erasure coding dump code |  Trivial | erasure-coding, native | László Bence Nagy | László Bence Nagy |
+| [HDFS-10922](https://issues.apache.org/jira/browse/HDFS-10922) | Adding additional unit tests for Trash (II) |  Major | test | Xiaoyu Yao | Weiwei Yang |
+| [HDFS-9390](https://issues.apache.org/jira/browse/HDFS-9390) | Block management for maintenance states |  Major | . | Ming Ma | Ming Ma |
+| [HADOOP-13061](https://issues.apache.org/jira/browse/HADOOP-13061) | Refactor erasure coders |  Major | . | Rui Li | Kai Sasaki |
+| [YARN-5741](https://issues.apache.org/jira/browse/YARN-5741) | [YARN-3368] Update UI2 documentation for new UI2 path |  Major | . | Kai Sasaki | Kai Sasaki |
+| [HDFS-10906](https://issues.apache.org/jira/browse/HDFS-10906) | Add unit tests for Trash with HDFS encryption zones |  Major | encryption | Xiaoyu Yao | Hanisha Koneru |
+| [YARN-5561](https://issues.apache.org/jira/browse/YARN-5561) | [Atsv2] : Support for ability to retrieve apps/app-attempt/containers and entities via REST |  Major | timelinereader | Rohith Sharma K S | Rohith Sharma K S |
+| [HADOOP-13735](https://issues.apache.org/jira/browse/HADOOP-13735) | ITestS3AFileContextStatistics.testStatistics() failing |  Minor | fs/s3 | Steve Loughran | Pieter Reuse |
+| [HDFS-10976](https://issues.apache.org/jira/browse/HDFS-10976) | Report erasure coding policy of EC files in Fsck |  Major | namenode | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HDFS-10998](https://issues.apache.org/jira/browse/HDFS-10998) | Add unit tests for HDFS command 'dfsadmin -fetchImage' in HA |  Major | test | Xiaobing Zhou | Xiaobing Zhou |
+| [YARN-4911](https://issues.apache.org/jira/browse/YARN-4911) | Bad placement policy in FairScheduler causes the RM to crash |  Major | fairscheduler | Ray Chiang | Ray Chiang |
+| [YARN-5047](https://issues.apache.org/jira/browse/YARN-5047) | Refactor nodeUpdate across schedulers |  Major | capacityscheduler, fairscheduler, scheduler | Ray Chiang | Ray Chiang |
+| [HDFS-8410](https://issues.apache.org/jira/browse/HDFS-8410) | Add computation time metrics to datanode for ECWorker |  Major | . | Li Bo | SammiChen |
+| [HDFS-10975](https://issues.apache.org/jira/browse/HDFS-10975) | fsck -list-corruptfileblocks does not report corrupt EC files |  Major | . | Wei-Chiu Chuang | Takanobu Asanuma |
+| [HADOOP-13727](https://issues.apache.org/jira/browse/HADOOP-13727) | S3A: Reduce high number of connections to EC2 Instance Metadata Service caused by InstanceProfileCredentialsProvider. |  Minor | fs/s3 | Rajesh Balamohan | Chris Nauroth |
+| [HADOOP-12774](https://issues.apache.org/jira/browse/HADOOP-12774) | s3a should use UGI.getCurrentUser.getShortname() for username |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [HADOOP-13309](https://issues.apache.org/jira/browse/HADOOP-13309) | Document S3A known limitations in file ownership and permission model. |  Minor | fs/s3 | Chris Nauroth | Chris Nauroth |
+| [HDFS-11011](https://issues.apache.org/jira/browse/HDFS-11011) | Add unit tests for HDFS command 'dfsadmin -set/clrSpaceQuota' |  Major | hdfs-client | Xiaobing Zhou | Xiaobing Zhou |
+| [HDFS-10638](https://issues.apache.org/jira/browse/HDFS-10638) | Modifications to remove the assumption that StorageLocation is associated with java.io.File in Datanode. |  Major | datanode, fs | Virajith Jalaparti | Virajith Jalaparti |
+| [HADOOP-11798](https://issues.apache.org/jira/browse/HADOOP-11798) | Native raw erasure coder in XOR codes |  Major | io | Kai Zheng | SammiChen |
+| [HADOOP-13614](https://issues.apache.org/jira/browse/HADOOP-13614) | Purge some superfluous/obsolete S3 FS tests that are slowing test runs down |  Minor | fs/s3, test | Steve Loughran | Steve Loughran |
+| [HDFS-11038](https://issues.apache.org/jira/browse/HDFS-11038) | DiskBalancer: support running multiple commands in single test |  Major | balancer & mover | Xiaobing Zhou | Xiaobing Zhou |
+| [YARN-5772](https://issues.apache.org/jira/browse/YARN-5772) | Replace old Hadoop logo with new one |  Major | yarn-ui-v2 | Akira Ajisaka | Akhil PB |
+| [YARN-5500](https://issues.apache.org/jira/browse/YARN-5500) | 'Master node' link under application tab is broken |  Critical | . | Sumana Sathish | Akhil PB |
+| [YARN-5497](https://issues.apache.org/jira/browse/YARN-5497) | Use different color for Undefined and Succeeded for Final State in applications page |  Trivial | . | Yesha Vora | Akhil PB |
+| [YARN-5490](https://issues.apache.org/jira/browse/YARN-5490) | [YARN-3368] Fix various alignment issues and broken breadcrumb link in Node page |  Major | . | Sunil G | Akhil PB |
+| [YARN-5779](https://issues.apache.org/jira/browse/YARN-5779) | [YARN-3368] Document limits/notes of the new YARN UI |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-5785](https://issues.apache.org/jira/browse/YARN-5785) | [YARN-3368] Accessing applications and containers list from Node page is throwing few exceptions in console |  Major | yarn-ui-v2 | Sunil G | Akhil PB |
+| [YARN-5799](https://issues.apache.org/jira/browse/YARN-5799) | Fix Opportunistic Allocation to set the correct value of Node Http Address |  Major | resourcemanager | Arun Suresh | Arun Suresh |
+| [YARN-4765](https://issues.apache.org/jira/browse/YARN-4765) | Split TestHBaseTimelineStorage into multiple test classes |  Major | timelineserver | Varun Saxena | Varun Saxena |
+| [YARN-5804](https://issues.apache.org/jira/browse/YARN-5804) | New UI2 is not able to launch with jetty 9 upgrade post HADOOP-10075 |  Major | yarn-ui-v2 | Sunil G | Sunil G |
+| [HADOOP-13680](https://issues.apache.org/jira/browse/HADOOP-13680) | fs.s3a.readahead.range to use getLongBytes |  Major | fs/s3 | Steve Loughran | Abhishek Modi |
+| [HDFS-11030](https://issues.apache.org/jira/browse/HDFS-11030) | TestDataNodeVolumeFailure#testVolumeFailure is flaky (though passing) |  Major | datanode, test | Mingliang Liu | Mingliang Liu |
+| [HDFS-10997](https://issues.apache.org/jira/browse/HDFS-10997) | Reduce number of path resolving methods |  Major | namenode | Daryn Sharp | Daryn Sharp |
+| [HDFS-10499](https://issues.apache.org/jira/browse/HDFS-10499) | TestNameNodeMetadataConsistency#testGenerationStampInFuture Fails Intermittently |  Major | namenode, test | Hanisha Koneru | Yiqun Lin |
+| [HDFS-10633](https://issues.apache.org/jira/browse/HDFS-10633) | DiskBalancer : Add the description for the new setting dfs.disk.balancer.plan.threshold.percent in HDFSDiskbalancer.md |  Minor | documentation | Yiqun Lin | Yiqun Lin |
+| [HDFS-11065](https://issues.apache.org/jira/browse/HDFS-11065) | Add space quota tests for heterogenous storages |  Major | hdfs | Xiaobing Zhou | Xiaobing Zhou |
+| [HDFS-11031](https://issues.apache.org/jira/browse/HDFS-11031) | Add additional unit test for DataNode startup behavior when volumes fail |  Major | datanode, test | Mingliang Liu | Mingliang Liu |
+| [HDFS-10566](https://issues.apache.org/jira/browse/HDFS-10566) | Submit plan request should throw exception if Datanode is in non-REGULAR status. |  Major | datanode | Jitendra Nath Pandey | Xiaobing Zhou |
+| [HDFS-11076](https://issues.apache.org/jira/browse/HDFS-11076) | Add unit test for extended Acls |  Major | test | Chen Liang | Chen Liang |
+| [YARN-2995](https://issues.apache.org/jira/browse/YARN-2995) | Enhance UI to show cluster resource utilization of various container Execution types |  Blocker | resourcemanager | Sriram Rao | Konstantinos Karanasos |
+| [YARN-4849](https://issues.apache.org/jira/browse/YARN-4849) | [YARN-3368] cleanup code base, integrate web UI related build to mvn, and fix licenses. |  Major | . | Wangda Tan | Wangda Tan |
+| [HDFS-11085](https://issues.apache.org/jira/browse/HDFS-11085) | Add unit test for NameNode failing to start when name dir is unwritable |  Major | namenode, test | Mingliang Liu | Xiaobing Zhou |
+| [YARN-5802](https://issues.apache.org/jira/browse/YARN-5802) | updateApplicationPriority api in scheduler should ensure to re-insert app to correct ordering policy |  Critical | capacity scheduler | Bibin A Chundatt | Bibin A Chundatt |
+| [YARN-5716](https://issues.apache.org/jira/browse/YARN-5716) | Add global scheduler interface definition and update CapacityScheduler to use it. |  Major | capacityscheduler | Wangda Tan | Wangda Tan |
+| [YARN-5833](https://issues.apache.org/jira/browse/YARN-5833) | Add validation to ensure default ports are unique in Configuration |  Major | yarn | Konstantinos Karanasos | Konstantinos Karanasos |
+| [HDFS-11083](https://issues.apache.org/jira/browse/HDFS-11083) | Add unit test for DFSAdmin -report command |  Major | shell, test | Mingliang Liu | Xiaobing Zhou |
+| [YARN-4329](https://issues.apache.org/jira/browse/YARN-4329) | Allow fetching exact reason as to why a submitted app is in ACCEPTED state in Fair Scheduler |  Major | fairscheduler, resourcemanager | Naganarasimha G R | Yufei Gu |
+| [YARN-4498](https://issues.apache.org/jira/browse/YARN-4498) | Application level node labels stats to be available in REST |  Major | api, client, resourcemanager | Bibin A Chundatt | Bibin A Chundatt |
+| [YARN-5611](https://issues.apache.org/jira/browse/YARN-5611) | Provide an API to update lifetime of an application. |  Major | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [HDFS-11122](https://issues.apache.org/jira/browse/HDFS-11122) | TestDFSAdmin#testReportCommand fails due to timed out |  Minor | test | Yiqun Lin | Yiqun Lin |
+| [HDFS-11119](https://issues.apache.org/jira/browse/HDFS-11119) | Support for parallel checking of StorageLocations on DataNode startup |  Major | datanode | Arpit Agarwal | Arpit Agarwal |
+| [HDFS-10872](https://issues.apache.org/jira/browse/HDFS-10872) | Add MutableRate metrics for FSNamesystemLock operations |  Major | namenode | Erik Krogen | Erik Krogen |
+| [HDFS-11105](https://issues.apache.org/jira/browse/HDFS-11105) | TestRBWBlockInvalidation#testRWRInvalidation fails intermittently |  Major | namenode, test | Yiqun Lin | Yiqun Lin |
+| [HDFS-11114](https://issues.apache.org/jira/browse/HDFS-11114) | Support for running async disk checks in DataNode |  Major | datanode | Arpit Agarwal | Arpit Agarwal |
+| [HADOOP-13822](https://issues.apache.org/jira/browse/HADOOP-13822) | Use GlobalStorageStatistics.INSTANCE.reset() at FileSystem#clearStatistics() |  Major | fs | Brahma Reddy Battula | Brahma Reddy Battula |
+| [HADOOP-11601](https://issues.apache.org/jira/browse/HADOOP-11601) | Enhance FS spec & tests to mandate FileStatus.getBlocksize() \>0 for non-empty files |  Minor | fs, test | Steve Loughran | Steve Loughran |
+| [HDFS-11113](https://issues.apache.org/jira/browse/HDFS-11113) | Document dfs.client.read.striped configuration in hdfs-default.xml |  Minor | documentation, hdfs-client | Rakesh R | Rakesh R |
+| [HDFS-11148](https://issues.apache.org/jira/browse/HDFS-11148) | Update DataNode to use StorageLocationChecker at startup |  Major | datanode | Arpit Agarwal | Arpit Agarwal |
+| [HADOOP-13655](https://issues.apache.org/jira/browse/HADOOP-13655) | document object store use with fs shell and distcp |  Major | documentation, fs, fs/s3 | Steve Loughran | Steve Loughran |
+| [YARN-5865](https://issues.apache.org/jira/browse/YARN-5865) | Retrospect updateApplicationPriority api to handle state store exception in align with YARN-5611 |  Major | . | Sunil G | Sunil G |
+| [HADOOP-13801](https://issues.apache.org/jira/browse/HADOOP-13801) | regression: ITestS3AMiniYarnCluster failing |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [HDFS-10368](https://issues.apache.org/jira/browse/HDFS-10368) | Erasure Coding: Deprecate replication-related config keys |  Major | erasure-coding | Rakesh R | Rakesh R |
+| [YARN-5649](https://issues.apache.org/jira/browse/YARN-5649) | Add REST endpoints for updating application timeouts |  Major | scheduler | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-4206](https://issues.apache.org/jira/browse/YARN-4206) | Add Application timeouts in Application report and CLI |  Major | scheduler | nijel | Rohith Sharma K S |
+| [HDFS-10994](https://issues.apache.org/jira/browse/HDFS-10994) | Support an XOR policy XOR-2-1-64k in HDFS |  Major | erasure-coding | SammiChen | SammiChen |
+| [HADOOP-13823](https://issues.apache.org/jira/browse/HADOOP-13823) | s3a rename: fail if dest file exists |  Blocker | fs/s3 | Steve Loughran | Steve Loughran |
+| [HDFS-11149](https://issues.apache.org/jira/browse/HDFS-11149) | Support for parallel checking of FsVolumes |  Major | datanode | Arpit Agarwal | Arpit Agarwal |
+| [HDFS-8678](https://issues.apache.org/jira/browse/HDFS-8678) | Bring back the feature to view chunks of files in the HDFS file browser |  Major | ui | Ravi Prakash | Ravi Prakash |
+| [YARN-5761](https://issues.apache.org/jira/browse/YARN-5761) | Separate QueueManager from Scheduler |  Major | capacityscheduler | Xuan Gong | Xuan Gong |
+| [HADOOP-13857](https://issues.apache.org/jira/browse/HADOOP-13857) | S3AUtils.translateException to map (wrapped) InterruptedExceptions to InterruptedIOEs |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [HADOOP-13855](https://issues.apache.org/jira/browse/HADOOP-13855) | Fix a couple of the s3a statistic names to be consistent with the rest |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [HADOOP-13257](https://issues.apache.org/jira/browse/HADOOP-13257) | Improve Azure Data Lake contract tests. |  Major | fs/adl | Chris Nauroth | Vishwajeet Dusane |
+| [YARN-5746](https://issues.apache.org/jira/browse/YARN-5746) | The state of the parentQueue and its childQueues should be synchronized. |  Major | capacity scheduler, resourcemanager | Xuan Gong | Xuan Gong |
+| [HDFS-11178](https://issues.apache.org/jira/browse/HDFS-11178) | TestAddStripedBlockInFBR#testAddBlockInFullBlockReport fails frequently in trunk |  Major | test | Yiqun Lin | Yiqun Lin |
+| [HDFS-11172](https://issues.apache.org/jira/browse/HDFS-11172) | Support an erasure coding policy using RS 10 + 4 |  Major | erasure-coding | SammiChen | Wei Zhou |
+| [YARN-5965](https://issues.apache.org/jira/browse/YARN-5965) | Retrospect ApplicationReport#getApplicationTimeouts |  Major | scheduler | Jian He | Rohith Sharma K S |
+| [YARN-5922](https://issues.apache.org/jira/browse/YARN-5922) | Remove direct references of HBaseTimelineWriter/Reader in core ATS classes |  Major | yarn | Haibo Chen | Haibo Chen |
+| [HDFS-8630](https://issues.apache.org/jira/browse/HDFS-8630) | WebHDFS : Support get/set/unset StoragePolicy |  Major | webhdfs | nijel | Surendra Singh Lilhore |
+| [YARN-5925](https://issues.apache.org/jira/browse/YARN-5925) | Extract hbase-backend-exclusive utility methods from TimelineStorageUtil |  Major | yarn | Haibo Chen | Haibo Chen |
+| [YARN-5982](https://issues.apache.org/jira/browse/YARN-5982) | Simplify opportunistic container parameters and metrics |  Major | . | Konstantinos Karanasos | Konstantinos Karanasos |
+| [YARN-5970](https://issues.apache.org/jira/browse/YARN-5970) | Validate application update timeout request parameters |  Major | scheduler | Rohith Sharma K S | Rohith Sharma K S |
+| [HADOOP-13871](https://issues.apache.org/jira/browse/HADOOP-13871) | ITestS3AInputStreamPerformance.testTimeToOpenAndReadWholeFileBlocks performance awful |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [YARN-2009](https://issues.apache.org/jira/browse/YARN-2009) | CapacityScheduler: Add intra-queue preemption for app priority support |  Major | capacityscheduler | Devaraj K | Sunil G |
+| [HDFS-8411](https://issues.apache.org/jira/browse/HDFS-8411) | Add bytes count metrics to datanode for ECWorker |  Major | . | Li Bo | SammiChen |
+| [HADOOP-11804](https://issues.apache.org/jira/browse/HADOOP-11804) | Shaded Hadoop client artifacts and minicluster |  Major | build | Sean Busbey | Sean Busbey |
+| [HDFS-11188](https://issues.apache.org/jira/browse/HDFS-11188) | Change min supported DN and NN versions back to 2.x |  Critical | rolling upgrades | Andrew Wang | Andrew Wang |
+| [YARN-5524](https://issues.apache.org/jira/browse/YARN-5524) | Yarn live log aggregation does not throw if command line arg is wrong |  Major | log-aggregation | Prasanth Jayachandran | Xuan Gong |
+| [YARN-5650](https://issues.apache.org/jira/browse/YARN-5650) | Render Application Timeout value in web UI |  Major | scheduler | Rohith Sharma K S | Akhil PB |
+| [HDFS-11182](https://issues.apache.org/jira/browse/HDFS-11182) | Update DataNode to use DatasetVolumeChecker |  Major | datanode | Arpit Agarwal | Arpit Agarwal |
+| [YARN-5976](https://issues.apache.org/jira/browse/YARN-5976) | Update hbase version to 1.2 (removes phoenix dependencies) |  Major | . | Vrushali C | Vrushali C |
+| [YARN-4990](https://issues.apache.org/jira/browse/YARN-4990) | Re-direction of a particular log file within in a container in NM UI does not redirect properly to Log Server ( history ) on container completion |  Major | . | Hitesh Shah | Xuan Gong |
+| [YARN-5706](https://issues.apache.org/jira/browse/YARN-5706) | Fail to launch SLSRunner due to NPE |  Major | scheduler-load-simulator | Kai Sasaki | Kai Sasaki |
+| [YARN-5938](https://issues.apache.org/jira/browse/YARN-5938) | Refactoring OpportunisticContainerAllocator to use SchedulerRequestKey instead of Priority and other misc fixes |  Major | . | Arun Suresh | Arun Suresh |
+| [YARN-5756](https://issues.apache.org/jira/browse/YARN-5756) | Add state-machine implementation for scheduler queues |  Major | . | Xuan Gong | Xuan Gong |
+| [YARN-5931](https://issues.apache.org/jira/browse/YARN-5931) | Document timeout interfaces CLI and REST APIs |  Major | scheduler | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-5529](https://issues.apache.org/jira/browse/YARN-5529) | Create new DiskValidator class with metrics |  Major | nodemanager | Ray Chiang | Yufei Gu |
+| [YARN-6025](https://issues.apache.org/jira/browse/YARN-6025) | Fix synchronization issues of AbstractYarnScheduler#nodeUpdate and its implementations |  Major | capacity scheduler, scheduler | Naganarasimha G R | Naganarasimha G R |
+| [YARN-5923](https://issues.apache.org/jira/browse/YARN-5923) | Unable to access logs for a running application if YARN\_ACL\_ENABLE is enabled |  Major | . | Xuan Gong | Xuan Gong |
+| [YARN-4899](https://issues.apache.org/jira/browse/YARN-4899) | Queue metrics of SLS capacity scheduler only activated after app submit to the queue |  Major | capacity scheduler | Wangda Tan | Jonathan Hung |
+| [YARN-5959](https://issues.apache.org/jira/browse/YARN-5959) | RM changes to support change of container ExecutionType |  Major | . | Arun Suresh | Arun Suresh |
+| [YARN-5906](https://issues.apache.org/jira/browse/YARN-5906) | Update AppSchedulingInfo to use SchedulingPlacementSet |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-6040](https://issues.apache.org/jira/browse/YARN-6040) | Introduce api independent PendingAsk to replace usage of ResourceRequest within Scheduler classes |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-6009](https://issues.apache.org/jira/browse/YARN-6009) | RM fails to start during an upgrade - Failed to load/recover state (YarnException: Invalid application timeout, value=0 for type=LIFETIME) |  Critical | resourcemanager | Gour Saha | Rohith Sharma K S |
+| [YARN-6074](https://issues.apache.org/jira/browse/YARN-6074) | FlowRunEntity does not deserialize long values correctly |  Major | timelinereader | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-3955](https://issues.apache.org/jira/browse/YARN-3955) | Support for application priority ACLs in queues of CapacityScheduler |  Major | capacityscheduler | Sunil G | Sunil G |
+| [HDFS-11072](https://issues.apache.org/jira/browse/HDFS-11072) | Add ability to unset and change directory EC policy |  Major | erasure-coding | Andrew Wang | SammiChen |
+| [HDFS-9391](https://issues.apache.org/jira/browse/HDFS-9391) | Update webUI/JMX to display maintenance state info |  Major | . | Ming Ma | Manoj Govindassamy |
+| [YARN-5416](https://issues.apache.org/jira/browse/YARN-5416) | TestRMRestart#testRMRestartWaitForPreviousAMToFinish failed intermittently due to not wait SchedulerApplicationAttempt to be stopped |  Minor | test, yarn | Junping Du | Junping Du |
+| [HADOOP-13336](https://issues.apache.org/jira/browse/HADOOP-13336) | S3A to support per-bucket configuration |  Major | fs/s3 | Steve Loughran | Steve Loughran |
+| [YARN-6011](https://issues.apache.org/jira/browse/YARN-6011) | Add a new web service to list the files on a container in AHSWebService |  Major | . | Xuan Gong | Xuan Gong |
+| [YARN-5556](https://issues.apache.org/jira/browse/YARN-5556) | CapacityScheduler: Support deleting queues without requiring a RM restart |  Major | capacity scheduler | Xuan Gong | Naganarasimha G R |
+| [HDFS-11259](https://issues.apache.org/jira/browse/HDFS-11259) | Update fsck to display maintenance state info |  Major | datanode, namenode | Manoj Govindassamy | Manoj Govindassamy |
+| [YARN-5831](https://issues.apache.org/jira/browse/YARN-5831) | Propagate allowPreemptionFrom flag all the way down to the app |  Major | fairscheduler | Karthik Kambatla | Yufei Gu |
+| [YARN-5928](https://issues.apache.org/jira/browse/YARN-5928) | Move ATSv2 HBase backend code into a new module that is only dependent at runtime by yarn servers |  Major | yarn | Haibo Chen | Haibo Chen |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-10861](https://issues.apache.org/jira/browse/HDFS-10861) | Refactor StripeReaders and use ECChunk version decode API |  Major | . | SammiChen | SammiChen |
+| [MAPREDUCE-6780](https://issues.apache.org/jira/browse/MAPREDUCE-6780) | Add support for striping files in benchmarking of TeraGen and TeraSort |  Major | . | SammiChen | SammiChen |
+| [HDFS-10895](https://issues.apache.org/jira/browse/HDFS-10895) | Update HDFS Erasure Coding doc to add how to use ISA-L based coder |  Major | . | SammiChen | SammiChen |
+| [HDFS-10984](https://issues.apache.org/jira/browse/HDFS-10984) | Expose nntop output as metrics |  Major | namenode | Siddharth Wagle | Siddharth Wagle |
+| [YARN-5717](https://issues.apache.org/jira/browse/YARN-5717) | Add tests for container-executor's is\_feature\_enabled function |  Major | yarn | Sidharta Seethana | Sidharta Seethana |
+| [YARN-5704](https://issues.apache.org/jira/browse/YARN-5704) | Provide config knobs to control enabling/disabling new/work in progress features in container-executor |  Major | yarn | Sidharta Seethana | Sidharta Seethana |
+| [HDFS-11033](https://issues.apache.org/jira/browse/HDFS-11033) | Add documents for native raw erasure coder in XOR codes |  Major | documentation, erasure-coding | SammiChen | SammiChen |
+| [YARN-5308](https://issues.apache.org/jira/browse/YARN-5308) | FairScheduler: Move continuous scheduling related tests to TestContinuousScheduling |  Major | fairscheduler, test | Karthik Kambatla | Kai Sasaki |
+| [YARN-5822](https://issues.apache.org/jira/browse/YARN-5822) | Log ContainerRuntime initialization error in LinuxContainerExecutor |  Trivial | nodemanager | Sidharta Seethana | Sidharta Seethana |
+| [HDFS-11145](https://issues.apache.org/jira/browse/HDFS-11145) | Implement getTrashRoot() for ViewFileSystem |  Major | . | Manoj Govindassamy | Manoj Govindassamy |
+| [HDFS-11058](https://issues.apache.org/jira/browse/HDFS-11058) | Implement 'hadoop fs -df' command for ViewFileSystem |  Major | . | Manoj Govindassamy | Manoj Govindassamy |
+| [HADOOP-13828](https://issues.apache.org/jira/browse/HADOOP-13828) | Implement getFileChecksum(path, length) for ViewFileSystem |  Major | viewfs | Manoj Govindassamy | Manoj Govindassamy |
+| [YARN-4395](https://issues.apache.org/jira/browse/YARN-4395) | Typo in comment in ClientServiceDelegate |  Trivial | . | Daniel Templeton | Alison Yu |
+| [MAPREDUCE-6810](https://issues.apache.org/jira/browse/MAPREDUCE-6810) | hadoop-mapreduce-client-nativetask compilation broken on GCC-6.2.1 |  Major | . | Ravi Prakash | Ravi Prakash |
+| [HADOOP-13840](https://issues.apache.org/jira/browse/HADOOP-13840) | Implement getUsed() for ViewFileSystem |  Major | viewfs | Manoj Govindassamy | Manoj Govindassamy |
+| [HADOOP-13835](https://issues.apache.org/jira/browse/HADOOP-13835) | Move Google Test Framework code from mapreduce to hadoop-common |  Major | test | Varun Vasudev | Varun Vasudev |
+| [HDFS-11216](https://issues.apache.org/jira/browse/HDFS-11216) | Add remoteBytesRead counter metrics for erasure coding reconstruction task |  Major | . | SammiChen | SammiChen |
+| [YARN-5719](https://issues.apache.org/jira/browse/YARN-5719) | Enforce a C standard for native container-executor |  Major | nodemanager | Chris Douglas | Chris Douglas |
+| [HADOOP-13885](https://issues.apache.org/jira/browse/HADOOP-13885) | Implement getLinkTarget for ViewFileSystem |  Major | viewfs | Manoj Govindassamy | Manoj Govindassamy |
+| [YARN-5646](https://issues.apache.org/jira/browse/YARN-5646) | Add documentation and update config parameter names for scheduling of OPPORTUNISTIC containers |  Blocker | . | Konstantinos Karanasos | Konstantinos Karanasos |
+
+

hadoop-common-project/hadoop-common/src/site/markdown/release/3.0.0-alpha2/RELEASENOTES.3.0.0-alpha2.md

@@ -0,0 +1,618 @@
+
+<!---
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+-->
+# "Apache Hadoop"  3.0.0-alpha2 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
+
+
+---
+
+* [HADOOP-12756](https://issues.apache.org/jira/browse/HADOOP-12756) | *Major* | **Incorporate Aliyun OSS file system implementation**
+
+Aliyun OSS is widely used among China’s cloud users and this work implemented a new Hadoop compatible filesystem AliyunOSSFileSystem with oss scheme, similar to the s3a and azure support.
+
+
+---
+
+* [HDFS-10760](https://issues.apache.org/jira/browse/HDFS-10760) | *Major* | **DataXceiver#run() should not log InvalidToken exception as an error**
+
+Log InvalidTokenException at trace level in DataXceiver#run().
+
+
+---
+
+* [HADOOP-13361](https://issues.apache.org/jira/browse/HADOOP-13361) | *Major* | **Modify hadoop\_verify\_user to be consistent with hadoop\_subcommand\_opts (ie more granularity)**
+
+Users:
+
+In Apache Hadoop 3.0.0-alpha1, verification required environment variables with the format of HADOOP\_(subcommand)\_USER where subcommand was lowercase applied globally.  This changes the format to be (command)\_(subcommand)\_USER where all are uppercase to be consistent with the \_OPTS functionality as well as being able to set per-command options.  Additionally, the check is now happening sooner, which should make it faster to fail.
+
+Developers:
+
+This changes hadoop\_verify\_user to require the program's name as part of the function call.  This is incompatible with Apache Hadoop 3.0.0-alpha1.
+
+
+---
+
+* [YARN-5549](https://issues.apache.org/jira/browse/YARN-5549) | *Critical* | **AMLauncher#createAMContainerLaunchContext() should not log the command to be launched indiscriminately**
+
+Introduces a new configuration property, yarn.resourcemanager.amlauncher.log.command.  If this property is set to true, then the AM command being launched will be masked in the RM log.
+
+
+---
+
+* [HDFS-6962](https://issues.apache.org/jira/browse/HDFS-6962) | *Critical* | **ACL inheritance conflicts with umaskmode**
+
+The original implementation of HDFS ACLs applied the client's umask to the permissions when inheriting a default ACL defined on a parent directory.  This behavior is a deviation from the POSIX ACL specification, which states that the umask has no influence when a default ACL propagates from parent to child.  HDFS now offers the capability to ignore the umask in this case for improved compliance with POSIX.  This change is considered backward-incompatible, so the new behavior is off by default and must be explicitly configured by setting dfs.namenode.posix.acl.inheritance.enabled to true in hdfs-site.xml.  Please see the HDFS Permissions Guide for further details.
+
+
+---
+
+* [HADOOP-13341](https://issues.apache.org/jira/browse/HADOOP-13341) | *Major* | **Deprecate HADOOP\_SERVERNAME\_OPTS; replace with (command)\_(subcommand)\_OPTS**
+
+<!-- markdown -->
+Users:
+* Ability to set per-command+sub-command options from the command line.
+* Makes daemon environment variable options consistent across the project. (See deprecation list below)
+* HADOOP\_CLIENT\_OPTS is now honored for every non-daemon sub-command. Prior to this change, many sub-commands did not use it.
+
+Developers:
+* No longer need to do custom handling for options in the case section of the shell scripts.
+* Consolidates all \_OPTS handling into hadoop-functions.sh to enable future projects.
+* All daemons running with secure mode features now get \_SECURE\_EXTRA\_OPTS support.
+
+\_OPTS Changes:
+
+| Old | New |
+|:---- |:---- |
+| HADOOP\_BALANCER\_OPTS | HDFS\_BALANCER\_OPTS | 
+| HADOOP\_DATANODE\_OPTS | HDFS\_DATANODE\_OPTS | 
+| HADOOP\_DN\_SECURE_EXTRA_OPTS | HDFS\_DATANODE\_SECURE\_EXTRA\_OPTS | 
+| HADOOP\_JOB\_HISTORYSERVER\_OPTS | MAPRED\_HISTORYSERVER\_OPTS | 
+| HADOOP\_JOURNALNODE\_OPTS | HDFS\_JOURNALNODE\_OPTS | 
+| HADOOP\_MOVER\_OPTS | HDFS\_MOVER\_OPTS | 
+| HADOOP\_NAMENODE\_OPTS | HDFS\_NAMENODE\_OPTS | 
+| HADOOP\_NFS3\_OPTS | HDFS\_NFS3\_OPTS | 
+| HADOOP\_NFS3\_SECURE\_EXTRA\_OPTS | HDFS\_NFS3\_SECURE\_EXTRA\_OPTS | | HADOOP\_PORTMAP\_OPTS | HDFS\_PORTMAP\_OPTS | 
+| HADOOP\_SECONDARYNAMENODE\_OPTS | 
+HDFS\_SECONDARYNAMENODE\_OPTS | 
+| HADOOP\_ZKFC\_OPTS | HDFS\_ZKFC\_OPTS |
+
+
+---
+
+* [HADOOP-13588](https://issues.apache.org/jira/browse/HADOOP-13588) | *Major* | **ConfServlet should respect Accept request header**
+
+Conf HTTP service should set response's content type according to the Accept header in the request.
+
+
+---
+
+* [HDFS-10636](https://issues.apache.org/jira/browse/HDFS-10636) | *Major* | **Modify ReplicaInfo to remove the assumption that replica metadata and data are stored in java.io.File.**
+
+**WARNING: No release note provided for this change.**
+
+
+---
+
+* [HADOOP-13218](https://issues.apache.org/jira/browse/HADOOP-13218) | *Major* | **Migrate other Hadoop side tests to prepare for removing WritableRPCEngine**
+
+**WARNING: No release note provided for this change.**
+
+
+---
+
+* [HDFS-10489](https://issues.apache.org/jira/browse/HDFS-10489) | *Minor* | **Deprecate dfs.encryption.key.provider.uri for HDFS encryption zones**
+
+The configuration dfs.encryption.key.provider.uri is deprecated. To configure key provider in HDFS, please use hadoop.security.key.provider.path.
+
+
+---
+
+* [HDFS-10877](https://issues.apache.org/jira/browse/HDFS-10877) | *Major* | **Make RemoteEditLogManifest.committedTxnId optional in Protocol Buffers**
+
+A new protobuf field added to RemoteEditLogManifest was mistakenly marked as required. This changes the field to optional, preserving compatibility with 2.x releases but breaking compatibility with 3.0.0-alpha1.
+
+
+---
+
+* [HDFS-10914](https://issues.apache.org/jira/browse/HDFS-10914) | *Critical* | **Move remnants of oah.hdfs.client to hadoop-hdfs-client**
+
+The remaining classes in the org.apache.hadoop.hdfs.client package have been moved from hadoop-hdfs to hadoop-hdfs-client.
+
+
+---
+
+* [HADOOP-13681](https://issues.apache.org/jira/browse/HADOOP-13681) | *Major* | **Reduce Kafka dependencies in hadoop-kafka module**
+
+Changed Apache Kafka dependency from kafka-2.10 to kafka-clients in hadoop-kafka module.
+
+
+---
+
+* [HADOOP-12667](https://issues.apache.org/jira/browse/HADOOP-12667) | *Major* | **s3a: Support createNonRecursive API**
+
+S3A now provides a working implementation of the FileSystem#createNonRecursive method.
+
+
+---
+
+* [HDFS-10609](https://issues.apache.org/jira/browse/HDFS-10609) | *Major* | **Uncaught InvalidEncryptionKeyException during pipeline recovery may abort downstream applications**
+
+If pipeline recovery fails due to expired encryption key, attempt to refresh the key and retry.
+
+
+---
+
+* [HADOOP-13678](https://issues.apache.org/jira/browse/HADOOP-13678) | *Major* | **Update jackson from 1.9.13 to 2.x in hadoop-tools**
+
+Jackson 1.9.13 dependency was removed from hadoop-tools module.
+
+
+---
+
+* [MAPREDUCE-6776](https://issues.apache.org/jira/browse/MAPREDUCE-6776) | *Major* | **yarn.app.mapreduce.client.job.max-retries should have a more useful default**
+
+The default value of yarn.app.mapreduce.client.job.max-retries has been changed from 0 to 3.  This will help protect clients from failures that are transient.  True failures may take slightly longer now due to the retries.
+
+
+---
+
+* [HDFS-10797](https://issues.apache.org/jira/browse/HDFS-10797) | *Major* | **Disk usage summary of snapshots causes renamed blocks to get counted twice**
+
+Disk usage summaries previously incorrectly counted files twice if they had been renamed (including files moved to Trash) since being snapshotted. Summaries now include current data plus snapshotted data that is no longer under the directory either due to deletion or being moved outside of the directory.
+
+
+---
+
+* [HADOOP-13699](https://issues.apache.org/jira/browse/HADOOP-13699) | *Critical* | **Configuration does not substitute multiple references to the same var**
+
+This changes the config var cycle detection introduced in 3.0.0-alpha1 by HADOOP-6871 such that it detects single-variable but not multi-variable loops. This also fixes resolution of multiple specifications of the same variable in a config value.
+
+
+---
+
+* [HDFS-10637](https://issues.apache.org/jira/browse/HDFS-10637) | *Major* | **Modifications to remove the assumption that FsVolumes are backed by java.io.File.**
+
+**WARNING: No release note provided for this change.**
+
+
+---
+
+* [HDFS-10916](https://issues.apache.org/jira/browse/HDFS-10916) | *Major* | **Switch from "raw" to "system" xattr namespace for erasure coding policy**
+
+EC policy is now stored in the "system" extended attribute namespace rather than "raw". This means the EC policy extended attribute is no longer directly accessible by users or preserved across a distcp that preserves raw extended attributes.
+
+Users can instead use HdfsAdmin#setErasureCodingPolicy and HdfsAdmin#getErasureCodingPolicy to set and get the EC policy for a path.
+
+
+---
+
+* [YARN-4464](https://issues.apache.org/jira/browse/YARN-4464) | *Blocker* | **Lower the default max applications stored in the RM and store**
+
+The maximum applications the RM stores in memory and in the state-store by default has been lowered from 10,000 to 1,000. This should ease the pressure on the state-store. However, installations relying on the default to be 10,000 are affected.
+
+
+---
+
+* [HDFS-10883](https://issues.apache.org/jira/browse/HDFS-10883) | *Major* | **`getTrashRoot`'s behavior is not consistent in DFS after enabling EZ.**
+
+If root path / is an encryption zone, the old DistributedFileSystem#getTrashRoot(new Path("/")) returns
+/user/$USER/.Trash
+which is a wrong behavior. The correct value should be
+/.Trash/$USER
+
+
+---
+
+* [HADOOP-13721](https://issues.apache.org/jira/browse/HADOOP-13721) | *Minor* | **Remove stale method ViewFileSystem#getTrashCanLocation**
+
+The unused method getTrashCanLocation has been removed. This method has long been superceded by FileSystem#getTrashRoot.
+
+
+---
+
+* [HADOOP-13661](https://issues.apache.org/jira/browse/HADOOP-13661) | *Major* | **Upgrade HTrace version**
+
+Bump HTrace version from 4.0.1-incubating to 4.1.0-incubating.
+
+
+---
+
+* [HDFS-10957](https://issues.apache.org/jira/browse/HDFS-10957) | *Major* | **Retire BKJM from trunk**
+
+The BookkeeperJournalManager implementation has been removed. Users are encouraged to use QuorumJournalManager instead.
+
+
+---
+
+* [HADOOP-13522](https://issues.apache.org/jira/browse/HADOOP-13522) | *Major* | **Add %A and %a formats for fs -stat command to print permissions**
+
+Added permissions to the fs stat command. They are now available as symbolic (%A) and octal (%a) formats, which are in line with Linux.
+
+
+---
+
+* [HADOOP-13560](https://issues.apache.org/jira/browse/HADOOP-13560) | *Major* | **S3ABlockOutputStream to support huge (many GB) file writes**
+
+This mechanism replaces the (experimental) fast output stream of Hadoop 2.7.x, combining better scalability options with instrumentation. Consult the S3A documentation to see the extra configuration operations.
+
+
+---
+
+* [MAPREDUCE-6791](https://issues.apache.org/jira/browse/MAPREDUCE-6791) | *Minor* | **remove unnecessary dependency from hadoop-mapreduce-client-jobclient to hadoop-mapreduce-client-shuffle**
+
+An unnecessary dependency on hadoop-mapreduce-client-shuffle in hadoop-mapreduce-client-jobclient has been removed.
+
+
+---
+
+* [HADOOP-7352](https://issues.apache.org/jira/browse/HADOOP-7352) | *Major* | **FileSystem#listStatus should throw IOE upon access error**
+
+Change FileSystem#listStatus contract to never return null. Local filesystems prior to 3.0.0 returned null upon access	error. It is considered erroneous. We should expect FileSystem#listStatus to throw IOException upon access error.
+
+
+---
+
+* [HADOOP-13693](https://issues.apache.org/jira/browse/HADOOP-13693) | *Minor* | **Remove the message about HTTP OPTIONS in SPNEGO initialization message from kms audit log**
+
+kms-audit.log used to show an UNAUTHENTICATED message even for successful operations, because of the OPTIONS HTTP request during SPNEGO initial handshake. This message brings more confusion than help, and has hence been removed.
+
+
+---
+
+* [HDFS-11018](https://issues.apache.org/jira/browse/HDFS-11018) | *Major* | **Incorrect check and message in FsDatasetImpl#invalidate**
+
+Improves the error message when datanode removes a replica which is not found.
+
+
+---
+
+* [HDFS-10976](https://issues.apache.org/jira/browse/HDFS-10976) | *Major* | **Report erasure coding policy of EC files in Fsck**
+
+Fsck now reports whether a file is replicated and erasure-coded. If it is replicated, fsck reports replication factor of the file. If it is erasure coded, fsck reports the erasure coding policy of the file.
+
+
+---
+
+* [HDFS-10975](https://issues.apache.org/jira/browse/HDFS-10975) | *Major* | **fsck -list-corruptfileblocks does not report corrupt EC files**
+
+Fixed a bug that made fsck -list-corruptfileblocks counts corrupt erasure coded files incorrectly.
+
+
+---
+
+* [YARN-5388](https://issues.apache.org/jira/browse/YARN-5388) | *Critical* | **Deprecate and remove DockerContainerExecutor**
+
+DockerContainerExecutor is deprecated starting 2.9.0 and removed from 3.0.0. Please use LinuxContainerExecutor with the DockerRuntime to run Docker containers on YARN clusters.
+
+
+---
+
+* [HADOOP-11798](https://issues.apache.org/jira/browse/HADOOP-11798) | *Major* | **Native raw erasure coder in XOR codes**
+
+This provides a native implementation of XOR codec by leveraging Intel ISA-L library function to achieve a better performance.
+
+
+---
+
+* [HADOOP-13659](https://issues.apache.org/jira/browse/HADOOP-13659) | *Major* | **Upgrade jaxb-api version**
+
+Bump the version of third party dependency jaxb-api to 2.2.11.
+
+
+---
+
+* [YARN-3732](https://issues.apache.org/jira/browse/YARN-3732) | *Minor* | **Change NodeHeartbeatResponse.java and RegisterNodeManagerResponse.java as abstract classes**
+
+Interface classes has been changed to Abstract class to maintain consistency across all other protos.
+
+
+---
+
+* [YARN-5767](https://issues.apache.org/jira/browse/YARN-5767) | *Major* | **Fix the order that resources are cleaned up from the local Public/Private caches**
+
+This issue fixes a bug in how resources are evicted from the PUBLIC and PRIVATE yarn local caches used by the node manager for resource localization. In summary, the caches are now properly cleaned based on an LRU policy across both the public and private caches.
+
+
+---
+
+* [HDFS-11048](https://issues.apache.org/jira/browse/HDFS-11048) | *Major* | **Audit Log should escape control characters**
+
+HDFS audit logs are formatted as individual lines, each of which has a few of key-value pair fields. Some of the values come from client request (e.g. src, dst). Before this patch the control characters including \t \n etc are not escaped in audit logs. That may break lines unexpectedly or introduce additional table character (in the worst case, both) within a field. Tools that parse audit logs had to deal with this case carefully. After this patch, the control characters in the src/dst fields are escaped.
+
+
+---
+
+* [HADOOP-8500](https://issues.apache.org/jira/browse/HADOOP-8500) | *Minor* | **Fix javadoc jars to not contain entire target directory**
+
+Hadoop's javadoc jars should be significantly smaller, and contain only javadoc.
+
+As a related cleanup, the dummy hadoop-dist-\* jars are no longer generated as part of the build.
+
+
+---
+
+* [HADOOP-13792](https://issues.apache.org/jira/browse/HADOOP-13792) | *Major* | **Stackoverflow for schemeless defaultFS with trailing slash**
+
+FileSystem#getDefaultUri will throw IllegalArgumentException if default FS has no scheme and can not be fixed.
+
+
+---
+
+* [HDFS-10756](https://issues.apache.org/jira/browse/HDFS-10756) | *Major* | **Expose getTrashRoot to HTTPFS and WebHDFS**
+
+"getTrashRoot" returns a trash root for a path. Currently in DFS if the path "/foo" is a normal path, it returns "/user/$USER/.Trash" for "/foo" and if "/foo" is an encrypted zone, it returns "/foo/.Trash/$USER" for the child file/dir of "/foo". This patch is about to override the old "getTrashRoot" of httpfs and webhdfs, so that the behavior of returning trash root in httpfs and webhdfs are consistent with DFS.
+
+
+---
+
+* [HDFS-10970](https://issues.apache.org/jira/browse/HDFS-10970) | *Major* | **Update jackson from 1.9.13 to 2.x in hadoop-hdfs**
+
+Removed jackson 1.9.13 dependency from hadoop-hdfs-project module.
+
+
+---
+
+* [YARN-5847](https://issues.apache.org/jira/browse/YARN-5847) | *Major* | **Revert health check exit code check**
+
+This change reverts YARN-5567 from 3.0.0-alpha1. The exit codes of the health check script are once again ignored.
+
+
+---
+
+* [HDFS-9337](https://issues.apache.org/jira/browse/HDFS-9337) | *Major* | **Validate required params for WebHDFS requests**
+
+Strict validations will be done for mandatory parameters for WebHDFS REST requests.
+
+
+---
+
+* [HDFS-11116](https://issues.apache.org/jira/browse/HDFS-11116) | *Minor* | **Fix javac warnings caused by deprecation of APIs in TestViewFsDefaultValue**
+
+ViewFileSystem#getServerDefaults(Path) throws NotInMountException instead of FileNotFoundException for unmounted path.
+
+
+---
+
+* [HADOOP-12718](https://issues.apache.org/jira/browse/HADOOP-12718) | *Major* | **Incorrect error message by fs -put local dir without permission**
+
+<!-- markdown -->
+
+The `hadoop fs -ls` command now prints "Permission denied" rather than "No such file or directory" when the user doesn't have permission to traverse the path.
+
+
+---
+
+* [YARN-5825](https://issues.apache.org/jira/browse/YARN-5825) | *Major* | **ProportionalPreemptionalPolicy could use readLock over LeafQueue instead of synchronized block**
+
+**WARNING: No release note provided for this change.**
+
+
+---
+
+* [HDFS-11056](https://issues.apache.org/jira/browse/HDFS-11056) | *Major* | **Concurrent append and read operations lead to checksum error**
+
+Load last partial chunk checksum properly into memory when converting a finalized/temporary replica to rbw replica. This ensures concurrent reader reads the correct checksum that matches the data before the update.
+
+
+---
+
+* [YARN-5765](https://issues.apache.org/jira/browse/YARN-5765) | *Blocker* | **Revert CHMOD on the new dirs created-LinuxContainerExecutor creates appcache and its subdirectories with wrong group owner.**
+
+This change reverts YARN-5287 from 3.0.0-alpha1. chmod clears the set-group-ID bit of a regular file hence folder was getting reset with the rights.
+
+
+---
+
+* [YARN-5271](https://issues.apache.org/jira/browse/YARN-5271) | *Major* | **ATS client doesn't work with Jersey 2 on the classpath**
+
+A workaround to avoid dependency conflict with Spark2, before a full classpath isolation solution is implemented.
+Skip instantiating a Timeline Service client if encountering NoClassDefFoundError.
+
+
+---
+
+* [HADOOP-13660](https://issues.apache.org/jira/browse/HADOOP-13660) | *Major* | **Upgrade commons-configuration version to 2.1**
+
+Bump commons-configuration version from 1.6 to 2.1
+
+
+---
+
+* [HADOOP-12705](https://issues.apache.org/jira/browse/HADOOP-12705) | *Major* | **Upgrade Jackson 2.2.3 to 2.7.8**
+
+We are sorry for causing pain for everyone for whom this Jackson update causes problems, but it was proving impossible to stay on the older version: too much code had moved past it, and by staying back we were limiting what Hadoop could do, and giving everyone who wanted an up to date version of Jackson a different set of problems. We've selected Jackson 2.7.8 as it fixed fix a security issue in XML parsing, yet proved compatible at the API level with the Hadoop codebase --and hopefully everything downstream.
+
+
+---
+
+* [YARN-5713](https://issues.apache.org/jira/browse/YARN-5713) | *Major* | **Update jackson from 1.9.13 to 2.x in hadoop-yarn**
+
+Jackson 1.9.13 dependency was removed from hadoop-yarn-project.
+
+
+---
+
+* [HADOOP-13050](https://issues.apache.org/jira/browse/HADOOP-13050) | *Blocker* | **Upgrade to AWS SDK 1.11.45**
+
+The dependency on the AWS SDK has been bumped to 1.11.45.
+
+
+---
+
+* [HADOOP-1381](https://issues.apache.org/jira/browse/HADOOP-1381) | *Major* | **The distance between sync blocks in SequenceFiles should be configurable**
+
+The default sync interval within new SequenceFile writes is now 100KB, up from the older default of 2000B. The sync interval is now also manually configurable via the SequenceFile.Writer API.
+
+
+---
+
+* [HDFS-10994](https://issues.apache.org/jira/browse/HDFS-10994) | *Major* | **Support an XOR policy XOR-2-1-64k in HDFS**
+
+This introduced a new erasure coding policy named XOR-2-1-64k using the simple XOR codec, and it can be used to evaluate HDFS erasure coding feature in a small cluster (only 2 + 1 datanodes needed). The policy isn't recommended to be used in a production cluster.
+
+
+---
+
+* [MAPREDUCE-6743](https://issues.apache.org/jira/browse/MAPREDUCE-6743) | *Major* | **nativetask unit tests need to provide usable output; fix link errors during mvn test**
+
+As part of this patch, the Google test framework code was updated to v1.8.0
+
+
+---
+
+* [HADOOP-13706](https://issues.apache.org/jira/browse/HADOOP-13706) | *Major* | **Update jackson from 1.9.13 to 2.x in hadoop-common-project**
+
+Removed Jackson 1.9.13 dependency from hadoop-common module.
+
+
+---
+
+* [HADOOP-13812](https://issues.apache.org/jira/browse/HADOOP-13812) | *Blocker* | **Upgrade Tomcat to 6.0.48**
+
+Tomcat 6.0.46 starts to filter weak ciphers. Some old SSL clients may be affected. It is recommended to upgrade the SSL client. Run the SSL client against https://www.howsmyssl.com/a/check to find out its TLS version and cipher suites.
+
+
+---
+
+* [HDFS-5517](https://issues.apache.org/jira/browse/HDFS-5517) | *Major* | **Lower the default maximum number of blocks per file**
+
+The default value of "dfs.namenode.fs-limits.max-blocks-per-file" has been reduced from 1M to 10K.
+
+
+---
+
+* [HADOOP-13827](https://issues.apache.org/jira/browse/HADOOP-13827) | *Major* | **Add reencryptEncryptedKey interface to KMS**
+
+A reencryptEncryptedKey interface is added to the KMS, to re-encrypt an encrypted key with the latest version of encryption key.
+
+
+---
+
+* [HADOOP-13842](https://issues.apache.org/jira/browse/HADOOP-13842) | *Minor* | **Update jackson from 1.9.13 to 2.x in hadoop-maven-plugins**
+
+Jackson 1.9.13 dependency was removed from hadoop-maven-plugins module.
+
+
+---
+
+* [MAPREDUCE-4683](https://issues.apache.org/jira/browse/MAPREDUCE-4683) | *Critical* | **Create and distribute hadoop-mapreduce-client-core-tests.jar**
+
+hadoop-mapreduce-client-core module now creates and distributes test jar.
+
+
+---
+
+* [HDFS-11217](https://issues.apache.org/jira/browse/HDFS-11217) | *Major* | **Annotate NameNode and DataNode MXBean interfaces as Private/Stable**
+
+The DataNode and NameNode MXBean interfaces have been marked as Private and Stable to indicate that although users should not be implementing these interfaces directly, the information exposed by these interfaces is part of the HDFS public API.
+
+
+---
+
+* [HDFS-11229](https://issues.apache.org/jira/browse/HDFS-11229) | *Blocker* | **HDFS-11056 failed to close meta file**
+
+The fix for HDFS-11056 reads meta file to load last partial chunk checksum when a block is converted from finalized/temporary to rbw. However, it did not close the file explicitly, which may cause number of open files reaching system limit. This jira fixes it by closing the file explicitly after the meta file is read.
+
+
+---
+
+* [HADOOP-11804](https://issues.apache.org/jira/browse/HADOOP-11804) | *Major* | **Shaded Hadoop client artifacts and minicluster**
+
+<!-- markdown -->
+
+The `hadoop-client` Maven artifact available in 2.x releases pulls
+Hadoop's transitive dependencies onto a Hadoop application's classpath.
+This can be problematic if the versions of these transitive dependencies
+conflict with the versions used by the application.
+
+[HADOOP-11804](https://issues.apache.org/jira/browse/HADOOP-11804) adds
+new `hadoop-client-api` and `hadoop-client-runtime` artifacts that
+shade Hadoop's dependencies into a single jar. This avoids leaking
+Hadoop's dependencies onto the application's classpath.
+
+
+---
+
+* [HDFS-11160](https://issues.apache.org/jira/browse/HDFS-11160) | *Major* | **VolumeScanner reports write-in-progress replicas as corrupt incorrectly**
+
+Fixed a race condition that caused VolumeScanner to recognize a good replica as a bad one if the replica is also being written concurrently.
+
+
+---
+
+* [HADOOP-13597](https://issues.apache.org/jira/browse/HADOOP-13597) | *Major* | **Switch KMS from Tomcat to Jetty**
+
+The following environment variables are deprecated. Set the corresponding
+configuration properties instead.
+
+Environment Variable     \| Configuration Property       \| Configuration File
+-------------------------\|------------------------------\|--------------------
+KMS\_HTTP\_PORT            \| hadoop.kms.http.port         \| kms-site.xml
+KMS\_MAX\_HTTP\_HEADER\_SIZE \| hadoop.http.max.request.header.size and hadoop.http.max.response.header.size \| kms-site.xml
+KMS\_MAX\_THREADS          \| hadoop.http.max.threads      \| kms-site.xml
+KMS\_SSL\_ENABLED          \| hadoop.kms.ssl.enabled       \| kms-site.xml
+KMS\_SSL\_KEYSTORE\_FILE    \| ssl.server.keystore.location \| ssl-server.xml
+KMS\_SSL\_KEYSTORE\_PASS    \| ssl.server.keystore.password \| ssl-server.xml
+KMS\_TEMP                 \| hadoop.http.temp.dir         \| kms-site.xml
+
+These default HTTP Services have been added.
+
+Name               \| Description
+-------------------\|------------------------------------
+/conf              \| Display configuration properties
+/jmx               \| Java JMX management interface
+/logLevel          \| Get or set log level per class
+/logs              \| Display log files
+/stacks            \| Display JVM stacks
+/static/index.html \| The static home page
+
+Script kms.sh has been deprecated, use 'hadoop kms' instead. Conform to the Hadoop shell scripting framework. Support 'hadoop daemonlog'. Read SSL configurations from ssl-server.xml, like many other Hadoop components.
+
+
+---
+
+* [HADOOP-13953](https://issues.apache.org/jira/browse/HADOOP-13953) | *Major* | **Make FTPFileSystem's data connection mode and transfer mode configurable**
+
+Added two configuration key fs.ftp.data.connection.mode and fs.ftp.transfer.mode, and configure FTP data connection mode and transfer mode accordingly.
+
+
+---
+
+* [YARN-6071](https://issues.apache.org/jira/browse/YARN-6071) | *Blocker* | **Fix incompatible API change on AM-RM protocol due to YARN-3866 (trunk only)**
+
+**WARNING: No release note provided for this change.**
+
+
+---
+
+* [HADOOP-13673](https://issues.apache.org/jira/browse/HADOOP-13673) | *Major* | **Update scripts to be smarter when running with privilege**
+
+Apache Hadoop is now able to switch to the appropriate user prior to launching commands so long as the command is being run with a privileged user and the appropriate set of \_USER variables are defined.  This re-enables sbin/start-all.sh and sbin/stop-all.sh as well as fixes the sbin/start-dfs.sh and sbin/stop-dfs.sh to work with both secure and unsecure systems.
+
+
+---
+
+* [HADOOP-13964](https://issues.apache.org/jira/browse/HADOOP-13964) | *Major* | **Remove vestigal templates directories creation**
+
+This patch removes share/hadoop/{hadoop,hdfs,mapred,yarn}/templates directories and contents.
+
+
+