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Make upstream aware of 3.2.1 release.

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# Apache Hadoop Changelog
## Release 3.2.1 - 2019-09-10
### INCOMPATIBLE CHANGES:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-15922](https://issues.apache.org/jira/browse/HADOOP-15922) | DelegationTokenAuthenticationFilter get wrong doAsUser since it does not decode URL | Major | common, kms | He Xiaoqiao | He Xiaoqiao |
### NEW FEATURES:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-15950](https://issues.apache.org/jira/browse/HADOOP-15950) | Failover for LdapGroupsMapping | Major | common, security | Lukas Majercak | Lukas Majercak |
| [YARN-7055](https://issues.apache.org/jira/browse/YARN-7055) | YARN Timeline Service v.2: beta 1 / GA | Major | timelineclient, timelinereader, timelineserver | Vrushali C | |
| [YARN-9761](https://issues.apache.org/jira/browse/YARN-9761) | Allow overriding application submissions based on server side configs | Major | . | Jonathan Hung | pralabhkumar |
### IMPROVEMENTS:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-15676](https://issues.apache.org/jira/browse/HADOOP-15676) | Cleanup TestSSLHttpServer | Minor | common | Szilard Nemeth | Szilard Nemeth |
| [YARN-8896](https://issues.apache.org/jira/browse/YARN-8896) | Limit the maximum number of container assignments per heartbeat | Major | . | Weiwei Yang | Zhankun Tang |
| [YARN-8618](https://issues.apache.org/jira/browse/YARN-8618) | Yarn Service: When all the components of a service have restart policy NEVER then initiation of service upgrade should fail | Major | . | Chandni Singh | Chandni Singh |
| [HADOOP-15804](https://issues.apache.org/jira/browse/HADOOP-15804) | upgrade to commons-compress 1.18 | Major | . | PJ Fanning | Akira Ajisaka |
| [YARN-8916](https://issues.apache.org/jira/browse/YARN-8916) | Define a constant "docker" string in "ContainerRuntimeConstants.java" for better maintainability | Minor | . | Zhankun Tang | Zhankun Tang |
| [YARN-8908](https://issues.apache.org/jira/browse/YARN-8908) | Fix errors in yarn-default.xml related to GPU/FPGA | Major | . | Zhankun Tang | Zhankun Tang |
| [HDFS-13941](https://issues.apache.org/jira/browse/HDFS-13941) | make storageId in BlockPoolTokenSecretManager.checkAccess optional | Major | . | Ajay Kumar | Ajay Kumar |
| [HDFS-14029](https://issues.apache.org/jira/browse/HDFS-14029) | Sleep in TestLazyPersistFiles should be put into a loop | Trivial | hdfs | Adam Antal | Adam Antal |
| [YARN-8915](https://issues.apache.org/jira/browse/YARN-8915) | Update the doc about the default value of "maximum-container-assignments" for capacity scheduler | Minor | . | Zhankun Tang | Zhankun Tang |
| [HADOOP-15855](https://issues.apache.org/jira/browse/HADOOP-15855) | Review hadoop credential doc, including object store details | Minor | documentation, security | Steve Loughran | Steve Loughran |
| [YARN-7225](https://issues.apache.org/jira/browse/YARN-7225) | Add queue and partition info to RM audit log | Major | resourcemanager | Jonathan Hung | Eric Payne |
| [HADOOP-15687](https://issues.apache.org/jira/browse/HADOOP-15687) | Credentials class should allow access to aliases | Trivial | . | Lars Francke | Lars Francke |
| [YARN-8969](https://issues.apache.org/jira/browse/YARN-8969) | AbstractYarnScheduler#getNodeTracker should return generic type to avoid type casting | Major | . | Wanqiang Ji | Wanqiang Ji |
| [YARN-8977](https://issues.apache.org/jira/browse/YARN-8977) | Remove unnecessary type casting when calling AbstractYarnScheduler#getSchedulerNode | Trivial | . | Wanqiang Ji | Wanqiang Ji |
| [HDFS-14070](https://issues.apache.org/jira/browse/HDFS-14070) | Refactor NameNodeWebHdfsMethods to allow better extensibility | Major | . | CR Hota | CR Hota |
| [HADOOP-15926](https://issues.apache.org/jira/browse/HADOOP-15926) | Document upgrading the section in NOTICE.txt when upgrading the version of AWS SDK | Minor | documentation | Akira Ajisaka | Dinesh Chitlangia |
| [HADOOP-12558](https://issues.apache.org/jira/browse/HADOOP-12558) | distcp documentation is woefully out of date | Critical | documentation, tools/distcp | Allen Wittenauer | Dinesh Chitlangia |
| [HDFS-14063](https://issues.apache.org/jira/browse/HDFS-14063) | Support noredirect param for CREATE/APPEND/OPEN/GETFILECHECKSUM in HttpFS | Major | . | Íñigo Goiri | Íñigo Goiri |
| [HADOOP-15919](https://issues.apache.org/jira/browse/HADOOP-15919) | AliyunOSS: Enable Yarn to use OSS | Major | fs/oss | wujinhu | wujinhu |
| [HDFS-14064](https://issues.apache.org/jira/browse/HDFS-14064) | WEBHDFS: Support Enable/Disable EC Policy | Major | . | Ayush Saxena | Ayush Saxena |
| [HADOOP-15943](https://issues.apache.org/jira/browse/HADOOP-15943) | AliyunOSS: add missing owner & group attributes for oss FileStatus | Major | fs/oss | wujinhu | wujinhu |
| [MAPREDUCE-7164](https://issues.apache.org/jira/browse/MAPREDUCE-7164) | FileOutputCommitter does not report progress while merging paths. | Major | . | Kuhu Shukla | Kuhu Shukla |
| [YARN-9069](https://issues.apache.org/jira/browse/YARN-9069) | Fix SchedulerInfo#getSchedulerType for custom schedulers | Minor | . | Bilwa S T | Bilwa S T |
| [HDFS-14095](https://issues.apache.org/jira/browse/HDFS-14095) | EC: Track Erasure Coding commands in DFS statistics | Major | erasure-coding | Ayush Saxena | Ayush Saxena |
| [HDFS-14112](https://issues.apache.org/jira/browse/HDFS-14112) | Avoid recursive call to external authorizer for getContentSummary. | Critical | namenode | Jitendra Nath Pandey | Tsz Wo Nicholas Sze |
| [YARN-9036](https://issues.apache.org/jira/browse/YARN-9036) | Escape newlines in health report in YARN UI | Major | . | Jonathan Hung | Keqiu Hu |
| [YARN-9041](https://issues.apache.org/jira/browse/YARN-9041) | Performance Optimization of method FSPreemptionThread#identifyContainersToPreempt | Major | fairscheduler, scheduler preemption | Wanqiang Ji | Wanqiang Ji |
| [YARN-9085](https://issues.apache.org/jira/browse/YARN-9085) | Add Guaranteed and MaxCapacity to CSQueueMetrics | Major | . | Jonathan Hung | Jonathan Hung |
| [HDFS-14124](https://issues.apache.org/jira/browse/HDFS-14124) | EC : Support EC Commands (set/get/unset EcPolicy) via WebHdfs | Major | erasure-coding, httpfs, webhdfs | Souryakanta Dwivedy | Ayush Saxena |
| [HADOOP-15808](https://issues.apache.org/jira/browse/HADOOP-15808) | Harden Token service loader use | Major | security | Steve Loughran | Steve Loughran |
| [YARN-9122](https://issues.apache.org/jira/browse/YARN-9122) | Add table of contents to YARN Service API document | Minor | documentation | Akira Ajisaka | Zhankun Tang |
| [HDFS-14171](https://issues.apache.org/jira/browse/HDFS-14171) | Performance improvement in Tailing EditLog | Major | namenode | Kenneth Yang | Kenneth Yang |
| [HADOOP-15481](https://issues.apache.org/jira/browse/HADOOP-15481) | Emit FairCallQueue stats as metrics | Major | metrics, rpc-server | Erik Krogen | Christopher Gregorian |
| [HADOOP-15994](https://issues.apache.org/jira/browse/HADOOP-15994) | Upgrade Jackson2 to 2.9.8 | Major | security | Akira Ajisaka | lqjacklee |
| [HADOOP-16019](https://issues.apache.org/jira/browse/HADOOP-16019) | ZKDelegationTokenSecretManager won't log exception message occured in function setJaasConfiguration | Minor | common | luhuachao | luhuachao |
| [HDFS-14213](https://issues.apache.org/jira/browse/HDFS-14213) | Remove Jansson from BUILDING.txt | Minor | documentation | Akira Ajisaka | Dinesh Chitlangia |
| [HDFS-14221](https://issues.apache.org/jira/browse/HDFS-14221) | Replace Guava Optional with Java Optional | Major | . | Arpit Agarwal | Arpit Agarwal |
| [HDFS-14222](https://issues.apache.org/jira/browse/HDFS-14222) | Make ThrottledAsyncChecker constructor public | Major | . | Arpit Agarwal | Arpit Agarwal |
| [HADOOP-16075](https://issues.apache.org/jira/browse/HADOOP-16075) | Upgrade checkstyle version to 8.16 | Minor | build | Dinesh Chitlangia | Dinesh Chitlangia |
| [HADOOP-16089](https://issues.apache.org/jira/browse/HADOOP-16089) | AliyunOSS: update oss-sdk version to 3.4.1 | Major | fs/oss | wujinhu | wujinhu |
| [HDFS-14231](https://issues.apache.org/jira/browse/HDFS-14231) | DataXceiver#run() should not log exceptions caused by InvalidToken exception as an error | Major | hdfs | Kitti Nanasi | Kitti Nanasi |
| [YARN-7171](https://issues.apache.org/jira/browse/YARN-7171) | RM UI should sort memory / cores numerically | Major | . | Eric Maynard | Ahmed Hussein |
| [YARN-9282](https://issues.apache.org/jira/browse/YARN-9282) | Typo in javadoc of class LinuxContainerExecutor: hadoop.security.authetication should be 'authentication' | Trivial | . | Szilard Nemeth | Charan Hebri |
| [HADOOP-16108](https://issues.apache.org/jira/browse/HADOOP-16108) | Tail Follow Interval Should Allow To Specify The Sleep Interval To Save Unnecessary RPC's | Major | . | Harshakiran Reddy | Ayush Saxena |
| [YARN-8295](https://issues.apache.org/jira/browse/YARN-8295) | [UI2] Improve "Resource Usage" tab error message when there are no data available. | Minor | yarn-ui-v2 | Gergely Novák | Charan Hebri |
| [YARN-7824](https://issues.apache.org/jira/browse/YARN-7824) | [UI2] Yarn Component Instance page should include link to container logs | Major | yarn-ui-v2 | Yesha Vora | Akhil PB |
| [HADOOP-15281](https://issues.apache.org/jira/browse/HADOOP-15281) | Distcp to add no-rename copy option | Major | tools/distcp | Steve Loughran | Andrew Olson |
| [YARN-9309](https://issues.apache.org/jira/browse/YARN-9309) | Improve graph text in SLS to avoid overlapping | Minor | . | Bilwa S T | Bilwa S T |
| [HDFS-14235](https://issues.apache.org/jira/browse/HDFS-14235) | Handle ArrayIndexOutOfBoundsException in DataNodeDiskMetrics#slowDiskDetectionDaemon | Major | . | Surendra Singh Lilhore | Ranith Sardar |
| [YARN-9168](https://issues.apache.org/jira/browse/YARN-9168) | DistributedShell client timeout should be -1 by default | Minor | . | Zhankun Tang | Zhankun Tang |
| [YARN-9087](https://issues.apache.org/jira/browse/YARN-9087) | Improve logging for initialization of Resource plugins | Major | yarn | Szilard Nemeth | Szilard Nemeth |
| [YARN-9121](https://issues.apache.org/jira/browse/YARN-9121) | Replace GpuDiscoverer.getInstance() to a readable object for easy access control | Major | . | Szilard Nemeth | Szilard Nemeth |
| [YARN-9139](https://issues.apache.org/jira/browse/YARN-9139) | Simplify initializer code of GpuDiscoverer | Major | . | Szilard Nemeth | Szilard Nemeth |
| [HDFS-14247](https://issues.apache.org/jira/browse/HDFS-14247) | Repeat adding node description into network topology | Minor | datanode | HuangTao | HuangTao |
| [YARN-9332](https://issues.apache.org/jira/browse/YARN-9332) | RackResolver tool should accept multiple hosts | Minor | yarn | Lantao Jin | Lantao Jin |
| [HADOOP-16140](https://issues.apache.org/jira/browse/HADOOP-16140) | hadoop fs expunge to add -immediate option to purge trash immediately | Major | fs | Stephen O'Donnell | Stephen O'Donnell |
| [YARN-9138](https://issues.apache.org/jira/browse/YARN-9138) | Improve test coverage for nvidia-smi binary execution of GpuDiscoverer | Major | . | Szilard Nemeth | Szilard Nemeth |
| [MAPREDUCE-7191](https://issues.apache.org/jira/browse/MAPREDUCE-7191) | JobHistoryServer should log exception when loading/parsing history file failed | Minor | mrv2 | Jiandan Yang | Jiandan Yang |
| [MAPREDUCE-7192](https://issues.apache.org/jira/browse/MAPREDUCE-7192) | JobHistoryServer attempts page support jump to containers log page in NM when logAggregation is disable | Major | mrv2 | Jiandan Yang | Jiandan Yang |
| [HDFS-14346](https://issues.apache.org/jira/browse/HDFS-14346) | Better time precision in getTimeDuration | Minor | namenode | Chao Sun | Chao Sun |
| [HDFS-14366](https://issues.apache.org/jira/browse/HDFS-14366) | Improve HDFS append performance | Major | hdfs | Chao Sun | Chao Sun |
| [HADOOP-16196](https://issues.apache.org/jira/browse/HADOOP-16196) | Path Parameterize Comparable | Minor | common | David Mollitor | David Mollitor |
| [HADOOP-16181](https://issues.apache.org/jira/browse/HADOOP-16181) | HadoopExecutors shutdown Cleanup | Minor | util | David Mollitor | David Mollitor |
| [HADOOP-16147](https://issues.apache.org/jira/browse/HADOOP-16147) | Allow CopyListing sequence file keys and values to be more easily customized | Major | tools/distcp | Andrew Olson | Andrew Olson |
| [MAPREDUCE-7190](https://issues.apache.org/jira/browse/MAPREDUCE-7190) | Add SleepJob additional parameter to make parallel runs distinguishable | Major | . | Adam Antal | Adam Antal |
| [YARN-9394](https://issues.apache.org/jira/browse/YARN-9394) | Use new API of RackResolver to get better performance | Major | yarn | Lantao Jin | Lantao Jin |
| [HADOOP-16208](https://issues.apache.org/jira/browse/HADOOP-16208) | Do Not Log InterruptedException in Client | Minor | common | David Mollitor | David Mollitor |
| [YARN-9463](https://issues.apache.org/jira/browse/YARN-9463) | Add queueName info when failing with queue capacity sanity check | Trivial | capacity scheduler | Aihua Xu | Aihua Xu |
| [HADOOP-16227](https://issues.apache.org/jira/browse/HADOOP-16227) | Upgrade checkstyle to 8.19 | Major | build | Akira Ajisaka | Akira Ajisaka |
| [HDFS-14432](https://issues.apache.org/jira/browse/HDFS-14432) | dfs.datanode.shared.file.descriptor.paths duplicated in hdfs-default.xml | Minor | hdfs | puleya7 | puleya7 |
| [HDFS-14463](https://issues.apache.org/jira/browse/HDFS-14463) | Add Log Level link under NameNode and DataNode Web UI Utilities dropdown | Trivial | webhdfs | Siyao Meng | Siyao Meng |
| [YARN-9529](https://issues.apache.org/jira/browse/YARN-9529) | Log correct cpu controller path on error while initializing CGroups. | Major | nodemanager | Jonathan Hung | Jonathan Hung |
| [HADOOP-16289](https://issues.apache.org/jira/browse/HADOOP-16289) | Allow extra jsvc startup option in hadoop\_start\_secure\_daemon in hadoop-functions.sh | Major | scripts | Siyao Meng | Siyao Meng |
| [HADOOP-16307](https://issues.apache.org/jira/browse/HADOOP-16307) | Intern User Name and Group Name in FileStatus | Major | fs | David Mollitor | David Mollitor |
| [HADOOP-16294](https://issues.apache.org/jira/browse/HADOOP-16294) | Enable access to context by DistCp subclasses | Trivial | tools/distcp | Andrew Olson | Andrew Olson |
| [HDFS-14507](https://issues.apache.org/jira/browse/HDFS-14507) | Document -blockingDecommission option for hdfs dfsadmin -listOpenFiles | Minor | documentation | Siyao Meng | Siyao Meng |
| [HDFS-14451](https://issues.apache.org/jira/browse/HDFS-14451) | Incorrect header or version mismatch log message | Minor | ipc | David Mollitor | Shweta |
| [HDFS-14502](https://issues.apache.org/jira/browse/HDFS-14502) | keepResults option in NNThroughputBenchmark should call saveNamespace() | Major | benchmarks, hdfs | Konstantin Shvachko | Konstantin Shvachko |
| [HADOOP-16323](https://issues.apache.org/jira/browse/HADOOP-16323) | https everywhere in Maven settings | Minor | build | Akira Ajisaka | Akira Ajisaka |
| [YARN-9563](https://issues.apache.org/jira/browse/YARN-9563) | Resource report REST API could return NaN or Inf | Minor | . | Ahmed Hussein | Ahmed Hussein |
| [YARN-9545](https://issues.apache.org/jira/browse/YARN-9545) | Create healthcheck REST endpoint for ATSv2 | Major | ATSv2 | Zoltan Siegl | Zoltan Siegl |
| [HDFS-10659](https://issues.apache.org/jira/browse/HDFS-10659) | Namenode crashes after Journalnode re-installation in an HA cluster due to missing paxos directory | Major | ha, journal-node | Amit Anand | star |
| [HDFS-14513](https://issues.apache.org/jira/browse/HDFS-14513) | FSImage which is saving should be clean while NameNode shutdown | Major | namenode | He Xiaoqiao | He Xiaoqiao |
| [YARN-9543](https://issues.apache.org/jira/browse/YARN-9543) | [UI2] Handle ATSv2 server down or failures cases gracefully in YARN UI v2 | Major | ATSv2, yarn-ui-v2 | Zoltan Siegl | Zoltan Siegl |
| [HADOOP-16369](https://issues.apache.org/jira/browse/HADOOP-16369) | Fix zstandard shortname misspelled as zts | Major | . | Jonathan Eagles | Jonathan Eagles |
| [HDFS-14560](https://issues.apache.org/jira/browse/HDFS-14560) | Allow block replication parameters to be refreshable | Major | namenode | Stephen O'Donnell | Stephen O'Donnell |
| [HDFS-12770](https://issues.apache.org/jira/browse/HDFS-12770) | Add doc about how to disable client socket cache | Trivial | hdfs-client | Weiwei Yang | Weiwei Yang |
| [HADOOP-9157](https://issues.apache.org/jira/browse/HADOOP-9157) | Better option for curl in hadoop-auth-examples | Minor | documentation | Jingguo Yao | Andras Bokor |
| [HDFS-14340](https://issues.apache.org/jira/browse/HDFS-14340) | Lower the log level when can't get postOpAttr | Minor | nfs | Anuhan Torgonshar | Anuhan Torgonshar |
| [HADOOP-15914](https://issues.apache.org/jira/browse/HADOOP-15914) | hadoop jar command has no help argument | Major | common | Adam Antal | Adam Antal |
| [YARN-9630](https://issues.apache.org/jira/browse/YARN-9630) | [UI2] Add a link in docs's top page | Major | documentation, yarn-ui-v2 | Wanqiang Ji | Wanqiang Ji |
| [HADOOP-16156](https://issues.apache.org/jira/browse/HADOOP-16156) | [Clean-up] Remove NULL check before instanceof and fix checkstyle in InnerNodeImpl | Minor | . | Shweta | Shweta |
| [HADOOP-14385](https://issues.apache.org/jira/browse/HADOOP-14385) | HttpExceptionUtils#validateResponse swallows exceptions | Trivial | . | Wei-Chiu Chuang | Wei-Chiu Chuang |
| [HDFS-12564](https://issues.apache.org/jira/browse/HDFS-12564) | Add the documents of swebhdfs configurations on the client side | Major | documentation, webhdfs | Takanobu Asanuma | Takanobu Asanuma |
| [HDFS-14403](https://issues.apache.org/jira/browse/HDFS-14403) | Cost-Based RPC FairCallQueue | Major | ipc, namenode | Erik Krogen | Christopher Gregorian |
| [HADOOP-16266](https://issues.apache.org/jira/browse/HADOOP-16266) | Add more fine-grained processing time metrics to the RPC layer | Minor | ipc | Christopher Gregorian | Erik Krogen |
| [YARN-9629](https://issues.apache.org/jira/browse/YARN-9629) | Support configurable MIN\_LOG\_ROLLING\_INTERVAL | Minor | log-aggregation, nodemanager, yarn | Adam Antal | Adam Antal |
| [HDFS-13694](https://issues.apache.org/jira/browse/HDFS-13694) | Making md5 computing being in parallel with image loading | Major | . | zhouyingchao | Lisheng Sun |
| [HDFS-14632](https://issues.apache.org/jira/browse/HDFS-14632) | Reduce useless #getNumLiveDataNodes call in SafeModeMonitor | Major | namenode | He Xiaoqiao | He Xiaoqiao |
| [YARN-9573](https://issues.apache.org/jira/browse/YARN-9573) | DistributedShell cannot specify LogAggregationContext | Major | distributed-shell, log-aggregation, yarn | Adam Antal | Adam Antal |
| [YARN-9337](https://issues.apache.org/jira/browse/YARN-9337) | GPU auto-discovery script runs even when the resource is given by hand | Major | yarn | Adam Antal | Adam Antal |
| [YARN-9127](https://issues.apache.org/jira/browse/YARN-9127) | Create more tests to verify GpuDeviceInformationParser | Major | . | Szilard Nemeth | Peter Bacsko |
| [YARN-9326](https://issues.apache.org/jira/browse/YARN-9326) | Fair Scheduler configuration defaults are not documented in case of min and maxResources | Major | docs, documentation, fairscheduler, yarn | Adam Antal | Adam Antal |
| [HDFS-14547](https://issues.apache.org/jira/browse/HDFS-14547) | DirectoryWithQuotaFeature.quota costs additional memory even the storage type quota is not set. | Major | . | Jinglun | Jinglun |
| [HDFS-14693](https://issues.apache.org/jira/browse/HDFS-14693) | NameNode should log a warning when EditLog IPC logger's pending size exceeds limit. | Minor | namenode | Xudong Cao | Xudong Cao |
| [YARN-9094](https://issues.apache.org/jira/browse/YARN-9094) | Remove unused interface method: NodeResourceUpdaterPlugin#handleUpdatedResourceFromRM | Trivial | . | Szilard Nemeth | Gergely Pollak |
| [YARN-9096](https://issues.apache.org/jira/browse/YARN-9096) | Some GpuResourcePlugin and ResourcePluginManager methods are synchronized unnecessarily | Major | . | Szilard Nemeth | Gergely Pollak |
| [YARN-9092](https://issues.apache.org/jira/browse/YARN-9092) | Create an object for cgroups mount enable and cgroups mount path as they belong together | Minor | . | Szilard Nemeth | Gergely Pollak |
| [YARN-9124](https://issues.apache.org/jira/browse/YARN-9124) | Resolve contradiction in ResourceUtils: addMandatoryResources / checkMandatoryResources work differently | Minor | . | Szilard Nemeth | Adam Antal |
| [YARN-8199](https://issues.apache.org/jira/browse/YARN-8199) | Logging fileSize of log files under NM Local Dir | Major | log-aggregation | Prabhu Joseph | Prabhu Joseph |
| [YARN-9729](https://issues.apache.org/jira/browse/YARN-9729) | [UI2] Fix error message for logs when ATSv2 is offline | Major | yarn-ui-v2 | Zoltan Siegl | Zoltan Siegl |
| [YARN-9135](https://issues.apache.org/jira/browse/YARN-9135) | NM State store ResourceMappings serialization are tested with Strings instead of real Device objects | Major | . | Szilard Nemeth | Peter Bacsko |
| [HDFS-14370](https://issues.apache.org/jira/browse/HDFS-14370) | Edit log tailing fast-path should allow for backoff | Major | namenode, qjm | Erik Krogen | Erik Krogen |
| [YARN-9442](https://issues.apache.org/jira/browse/YARN-9442) | container working directory has group read permissions | Minor | yarn | Jim Brennan | Jim Brennan |
| [HADOOP-16459](https://issues.apache.org/jira/browse/HADOOP-16459) | Backport [HADOOP-16266] "Add more fine-grained processing time metrics to the RPC layer" to branch-2 | Major | . | Erik Krogen | Erik Krogen |
| [HDFS-14491](https://issues.apache.org/jira/browse/HDFS-14491) | More Clarity on Namenode UI Around Blocks and Replicas | Minor | . | Alan Jackoway | Siyao Meng |
| [YARN-9134](https://issues.apache.org/jira/browse/YARN-9134) | No test coverage for redefining FPGA / GPU resource types in TestResourceUtils | Major | . | Szilard Nemeth | Peter Bacsko |
| [YARN-9133](https://issues.apache.org/jira/browse/YARN-9133) | Make tests more easy to comprehend in TestGpuResourceHandler | Major | . | Szilard Nemeth | Peter Bacsko |
| [YARN-9140](https://issues.apache.org/jira/browse/YARN-9140) | Code cleanup in ResourcePluginManager.initialize and in TestResourcePluginManager | Trivial | . | Szilard Nemeth | Peter Bacsko |
| [YARN-9676](https://issues.apache.org/jira/browse/YARN-9676) | Add DEBUG and TRACE level messages to AppLogAggregatorImpl and connected classes | Major | . | Adam Antal | Adam Antal |
| [YARN-9488](https://issues.apache.org/jira/browse/YARN-9488) | Skip YARNFeatureNotEnabledException from ClientRMService | Minor | resourcemanager | Prabhu Joseph | Prabhu Joseph |
| [YARN-8586](https://issues.apache.org/jira/browse/YARN-8586) | Extract log aggregation related fields and methods from RMAppImpl | Major | . | Szilard Nemeth | Peter Bacsko |
| [YARN-9100](https://issues.apache.org/jira/browse/YARN-9100) | Add tests for GpuResourceAllocator and do minor code cleanup | Major | . | Szilard Nemeth | Peter Bacsko |
| [HADOOP-15246](https://issues.apache.org/jira/browse/HADOOP-15246) | SpanReceiverInfo - Prefer ArrayList over LinkedList | Trivial | common | David Mollitor | David Mollitor |
| [HADOOP-16158](https://issues.apache.org/jira/browse/HADOOP-16158) | DistCp to support checksum validation when copy blocks in parallel | Major | tools/distcp | Kai Xie | Kai Xie |
| [HDFS-14746](https://issues.apache.org/jira/browse/HDFS-14746) | Trivial test code update after HDFS-14687 | Trivial | ec | Wei-Chiu Chuang | kevin su |
| [HDFS-13709](https://issues.apache.org/jira/browse/HDFS-13709) | Report bad block to NN when transfer block encounter EIO exception | Major | datanode | Chen Zhang | Chen Zhang |
| [HDFS-14665](https://issues.apache.org/jira/browse/HDFS-14665) | HttpFS: LISTSTATUS response is missing HDFS-specific fields | Major | httpfs | Siyao Meng | Siyao Meng |
| [HDFS-14276](https://issues.apache.org/jira/browse/HDFS-14276) | [SBN read] Reduce tailing overhead | Major | ha, namenode | Wei-Chiu Chuang | Ayush Saxena |
| [HADOOP-16061](https://issues.apache.org/jira/browse/HADOOP-16061) | Update Apache Yetus to 0.10.0 | Major | build | Akira Ajisaka | Akira Ajisaka |
| [YARN-9756](https://issues.apache.org/jira/browse/YARN-9756) | Create metric that sums total memory/vcores preempted per round | Major | capacity scheduler | Eric Payne | Manikandan R |
| [HDFS-14748](https://issues.apache.org/jira/browse/HDFS-14748) | Make DataNodePeerMetrics#minOutlierDetectionSamples configurable | Major | . | Lisheng Sun | Lisheng Sun |
| [HADOOP-15998](https://issues.apache.org/jira/browse/HADOOP-15998) | Ensure jar validation works on Windows. | Blocker | build | Brian Grunkemeyer | Brian Grunkemeyer |
| [HDFS-14633](https://issues.apache.org/jira/browse/HDFS-14633) | The StorageType quota and consume in QuotaFeature is not handled for rename | Major | . | Jinglun | Jinglun |
| [YARN-9810](https://issues.apache.org/jira/browse/YARN-9810) | Add queue capacity/maxcapacity percentage metrics | Major | . | Jonathan Hung | Shubham Gupta |
| [YARN-9763](https://issues.apache.org/jira/browse/YARN-9763) | Print application tags in application summary | Major | . | Jonathan Hung | Manoj Kumar |
| [YARN-9795](https://issues.apache.org/jira/browse/YARN-9795) | ClusterMetrics to include AM allocation delay | Minor | . | Fengnan Li | Fengnan Li |
| [YARN-8995](https://issues.apache.org/jira/browse/YARN-8995) | Log events info in AsyncDispatcher when event queue size cumulatively reaches a certain number every time. | Major | metrics, nodemanager, resourcemanager | zhuqi | zhuqi |
### BUG FIXES:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HDFS-13973](https://issues.apache.org/jira/browse/HDFS-13973) | getErasureCodingPolicy should log path in audit event | Major | hdfs | Shweta | Shweta |
| [YARN-8868](https://issues.apache.org/jira/browse/YARN-8868) | Set HTTPOnly attribute to Cookie | Major | . | Chandni Singh | Chandni Singh |
| [HDFS-14003](https://issues.apache.org/jira/browse/HDFS-14003) | Fix findbugs warning in trunk for FSImageFormatPBINode | Major | . | Yiqun Lin | Yiqun Lin |
| [YARN-8910](https://issues.apache.org/jira/browse/YARN-8910) | Misleading log statement in NM when max retries is -1 | Minor | . | Chandni Singh | Chandni Singh |
| [YARN-7502](https://issues.apache.org/jira/browse/YARN-7502) | Nodemanager restart docs should describe nodemanager supervised property | Major | documentation | Jason Lowe | Suma Shivaprasad |
| [YARN-8826](https://issues.apache.org/jira/browse/YARN-8826) | Fix lingering timeline collector after serviceStop in TimelineCollectorManager | Trivial | ATSv2 | Prabha Manepalli | Prabha Manepalli |
| [HDFS-14021](https://issues.apache.org/jira/browse/HDFS-14021) | TestReconstructStripedBlocksWithRackAwareness#testReconstructForNotEnoughRacks fails intermittently | Major | erasure-coding, test | Xiao Chen | Xiao Chen |
| [MAPREDUCE-7151](https://issues.apache.org/jira/browse/MAPREDUCE-7151) | RMContainerAllocator#handleJobPriorityChange expects application\_priority always | Major | . | Bibin A Chundatt | Bilwa S T |
| [HDFS-14028](https://issues.apache.org/jira/browse/HDFS-14028) | HDFS OIV temporary dir deletes folder | Major | hdfs | Adam Antal | Adam Antal |
| [HDFS-14027](https://issues.apache.org/jira/browse/HDFS-14027) | DFSStripedOutputStream should implement both hsync methods | Critical | erasure-coding | Xiao Chen | Xiao Chen |
| [HADOOP-15899](https://issues.apache.org/jira/browse/HADOOP-15899) | Update AWS Java SDK versions in NOTICE.txt | Major | . | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-15900](https://issues.apache.org/jira/browse/HADOOP-15900) | Update JSch versions in LICENSE.txt | Major | . | Akira Ajisaka | Akira Ajisaka |
| [HDFS-14042](https://issues.apache.org/jira/browse/HDFS-14042) | Fix NPE when PROVIDED storage is missing | Major | . | Íñigo Goiri | Virajith Jalaparti |
| [HDFS-14043](https://issues.apache.org/jira/browse/HDFS-14043) | Tolerate corrupted seen\_txid file | Major | hdfs, namenode | Lukas Majercak | Lukas Majercak |
| [YARN-8970](https://issues.apache.org/jira/browse/YARN-8970) | Improve the debug message in CS#allocateContainerOnSingleNode | Trivial | . | Weiwei Yang | Zhankun Tang |
| [YARN-8865](https://issues.apache.org/jira/browse/YARN-8865) | RMStateStore contains large number of expired RMDelegationToken | Major | resourcemanager | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [HDFS-14048](https://issues.apache.org/jira/browse/HDFS-14048) | DFSOutputStream close() throws exception on subsequent call after DataNode restart | Major | hdfs-client | Erik Krogen | Erik Krogen |
| [MAPREDUCE-7156](https://issues.apache.org/jira/browse/MAPREDUCE-7156) | NullPointerException when reaching max shuffle connections | Major | mrv2 | Peter Bacsko | Peter Bacsko |
| [YARN-8866](https://issues.apache.org/jira/browse/YARN-8866) | Fix a parsing error for crossdomain.xml | Major | build, yarn-ui-v2 | Takanobu Asanuma | Takanobu Asanuma |
| [HDFS-14039](https://issues.apache.org/jira/browse/HDFS-14039) | ec -listPolicies doesn't show correct state for the default policy when the default is not RS(6,3) | Major | erasure-coding | Xiao Chen | Kitti Nanasi |
| [HADOOP-15916](https://issues.apache.org/jira/browse/HADOOP-15916) | Upgrade Maven Surefire plugin to 3.0.0-M1 | Blocker | build | Akira Ajisaka | Akira Ajisaka |
| [YARN-9002](https://issues.apache.org/jira/browse/YARN-9002) | YARN Service keytab does not support s3, wasb, gs and is restricted to HDFS and local filesystem only | Major | yarn-native-services | Gour Saha | Gour Saha |
| [YARN-8233](https://issues.apache.org/jira/browse/YARN-8233) | NPE in CapacityScheduler#tryCommit when handling allocate/reserve proposal whose allocatedOrReservedContainer is null | Critical | capacityscheduler | Tao Yang | Tao Yang |
| [HDFS-14065](https://issues.apache.org/jira/browse/HDFS-14065) | Failed Storage Locations shows nothing in the Datanode Volume Failures | Major | . | Ayush Saxena | Ayush Saxena |
| [HADOOP-15923](https://issues.apache.org/jira/browse/HADOOP-15923) | create-release script should set max-cache-ttl as well as default-cache-ttl for gpg-agent | Blocker | build | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-15912](https://issues.apache.org/jira/browse/HADOOP-15912) | start-build-env.sh still creates an invalid /etc/sudoers.d/hadoop-build-${USER\_ID} file entry after HADOOP-15802 | Major | build | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-15869](https://issues.apache.org/jira/browse/HADOOP-15869) | BlockDecompressorStream#decompress should not return -1 in case of IOException. | Major | . | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [MAPREDUCE-7158](https://issues.apache.org/jira/browse/MAPREDUCE-7158) | Inefficient Flush Logic in JobHistory EventWriter | Major | . | Zichen Sun | Zichen Sun |
| [HADOOP-15930](https://issues.apache.org/jira/browse/HADOOP-15930) | Exclude MD5 checksum files from release artifact | Critical | build | Akira Ajisaka | Akira Ajisaka |
| [YARN-8856](https://issues.apache.org/jira/browse/YARN-8856) | TestTimelineReaderWebServicesHBaseStorage tests failing with NoClassDefFoundError | Major | . | Jason Lowe | Sushil Ks |
| [HADOOP-15925](https://issues.apache.org/jira/browse/HADOOP-15925) | The config and log of gpg-agent are removed in create-release script | Major | build | Akira Ajisaka | Dinesh Chitlangia |
| [HDFS-13963](https://issues.apache.org/jira/browse/HDFS-13963) | NN UI is broken with IE11 | Minor | namenode, ui | Daisuke Kobayashi | Ayush Saxena |
| [HDFS-14056](https://issues.apache.org/jira/browse/HDFS-14056) | Fix error messages in HDFS-12716 | Minor | hdfs | Adam Antal | Ayush Saxena |
| [YARN-8992](https://issues.apache.org/jira/browse/YARN-8992) | Fair scheduler can delete a dynamic queue while an application attempt is being added to the queue | Major | fairscheduler | Haibo Chen | Wilfred Spiegelenburg |
| [YARN-8984](https://issues.apache.org/jira/browse/YARN-8984) | AMRMClient#OutstandingSchedRequests leaks when AllocationTags is null or empty | Critical | . | Yang Wang | Yang Wang |
| [HADOOP-15948](https://issues.apache.org/jira/browse/HADOOP-15948) | Inconsistency in get and put syntax if filename/dirname contains space | Minor | fs | vivek kumar | Ayush Saxena |
| [HDFS-13816](https://issues.apache.org/jira/browse/HDFS-13816) | dfs.getQuotaUsage() throws NPE on non-existent dir instead of FileNotFoundException | Major | namenode | Vinayakumar B | Vinayakumar B |
| [MAPREDUCE-7162](https://issues.apache.org/jira/browse/MAPREDUCE-7162) | TestEvents#testEvents fails | Critical | jobhistoryserver, test | Zhaohui Xin | Zhaohui Xin |
| [YARN-9056](https://issues.apache.org/jira/browse/YARN-9056) | Yarn Service Upgrade: Instance state changes from UPGRADING to READY without performing a readiness check | Critical | . | Chandni Singh | Chandni Singh |
| [YARN-8812](https://issues.apache.org/jira/browse/YARN-8812) | Containers fail during creating a symlink which started with hyphen for a resource file | Minor | . | Oleksandr Shevchenko | Oleksandr Shevchenko |
| [YARN-9030](https://issues.apache.org/jira/browse/YARN-9030) | Log aggregation changes to handle filesystems which do not support setting permissions | Major | log-aggregation | Suma Shivaprasad | Suma Shivaprasad |
| [YARN-9067](https://issues.apache.org/jira/browse/YARN-9067) | YARN Resource Manager is running OOM because of leak of Configuration Object | Major | yarn-native-services | Eric Yang | Eric Yang |
| [MAPREDUCE-7165](https://issues.apache.org/jira/browse/MAPREDUCE-7165) | mapred-site.xml is misformatted in single node setup document | Major | documentation | Akira Ajisaka | Zhaohui Xin |
| [HADOOP-15970](https://issues.apache.org/jira/browse/HADOOP-15970) | Upgrade plexus-utils from 2.0.5 to 3.1.0 | Major | security | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-15966](https://issues.apache.org/jira/browse/HADOOP-15966) | Hadoop Kerberos broken on macos as java.security.krb5.realm is reset: Null realm name (601) | Major | scripts | Steve Loughran | Steve Loughran |
| [HADOOP-15974](https://issues.apache.org/jira/browse/HADOOP-15974) | Upgrade Curator version to 2.13.0 to fix ZK tests | Major | . | Jason Lowe | Akira Ajisaka |
| [YARN-9071](https://issues.apache.org/jira/browse/YARN-9071) | NM and service AM don't have updated status for reinitialized containers | Critical | . | Billie Rinaldi | Chandni Singh |
| [MAPREDUCE-7159](https://issues.apache.org/jira/browse/MAPREDUCE-7159) | FrameworkUploader: ensure proper permissions of generated framework tar.gz if restrictive umask is used | Major | mrv2 | Peter Bacsko | Peter Bacsko |
| [YARN-9009](https://issues.apache.org/jira/browse/YARN-9009) | Fix flaky test TestEntityGroupFSTimelineStore.testCleanLogs | Minor | . | OrDTesters | OrDTesters |
| [MAPREDUCE-7170](https://issues.apache.org/jira/browse/MAPREDUCE-7170) | Doc typo in PluggableShuffleAndPluggableSort.md | Minor | documentation | Zhaohui Xin | Zhaohui Xin |
| [YARN-9040](https://issues.apache.org/jira/browse/YARN-9040) | LevelDBCacheTimelineStore in ATS 1.5 leaks native memory | Major | timelineserver | Tarun Parimi | Tarun Parimi |
| [YARN-9084](https://issues.apache.org/jira/browse/YARN-9084) | Service Upgrade: With default readiness check, the status of upgrade is reported to be successful prematurely | Major | . | Chandni Singh | Chandni Singh |
| [HDFS-13661](https://issues.apache.org/jira/browse/HDFS-13661) | Ls command with e option fails when the filesystem is not HDFS | Major | erasure-coding, tools | Takanobu Asanuma | Takanobu Asanuma |
| [YARN-9154](https://issues.apache.org/jira/browse/YARN-9154) | Fix itemization in YARN service quickstart document | Minor | documentation | Akira Ajisaka | Ayush Saxena |
| [HDFS-14166](https://issues.apache.org/jira/browse/HDFS-14166) | Ls with -e option not giving the result in proper format | Major | . | Soumyapn | Shubham Dewan |
| [HDFS-14046](https://issues.apache.org/jira/browse/HDFS-14046) | In-Maintenance ICON is missing in datanode info page | Major | datanode | Harshakiran Reddy | Ranith Sardar |
| [HDFS-14183](https://issues.apache.org/jira/browse/HDFS-14183) | [SPS] Remove the -w parameter from the -satisfystoragepolicy usage | Major | . | Ayush Saxena | Ayush Saxena |
| [YARN-9164](https://issues.apache.org/jira/browse/YARN-9164) | Shutdown NM may cause NPE when opportunistic container scheduling is enabled | Critical | . | lujie | lujie |
| [YARN-8567](https://issues.apache.org/jira/browse/YARN-8567) | Fetching yarn logs fails for long running application if it is not present in timeline store | Major | log-aggregation | Tarun Parimi | Tarun Parimi |
| [HADOOP-16028](https://issues.apache.org/jira/browse/HADOOP-16028) | Fix NetworkTopology chooseRandom function to support excluded nodes | Major | . | Sihai Ke | Sihai Ke |
| [HADOOP-16030](https://issues.apache.org/jira/browse/HADOOP-16030) | AliyunOSS: bring fixes back from HADOOP-15671 | Blocker | fs/oss | wujinhu | wujinhu |
| [YARN-9162](https://issues.apache.org/jira/browse/YARN-9162) | Fix TestRMAdminCLI#testHelp | Major | resourcemanager, test | Ayush Saxena | Ayush Saxena |
| [YARN-9173](https://issues.apache.org/jira/browse/YARN-9173) | FairShare calculation broken for large values after YARN-8833 | Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [YARN-8833](https://issues.apache.org/jira/browse/YARN-8833) | Avoid potential integer overflow when computing fair shares | Major | fairscheduler | liyakun | liyakun |
| [HADOOP-16036](https://issues.apache.org/jira/browse/HADOOP-16036) | WASB: Disable jetty logging configuration announcement | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-16016](https://issues.apache.org/jira/browse/HADOOP-16016) | TestSSLFactory#testServerWeakCiphers sporadically fails in precommit builds | Major | security, test | Jason Lowe | Akira Ajisaka |
| [HDFS-14198](https://issues.apache.org/jira/browse/HDFS-14198) | Upload and Create button doesn't get enabled after getting reset. | Major | . | Ayush Saxena | Ayush Saxena |
| [YARN-8747](https://issues.apache.org/jira/browse/YARN-8747) | [UI2] YARN UI2 page loading failed due to js error under some time zone configuration | Critical | webapp | collinma | collinma |
| [YARN-9203](https://issues.apache.org/jira/browse/YARN-9203) | Fix typos in yarn-default.xml | Trivial | documentation | Rahul Padmanabhan | Rahul Padmanabhan |
| [YARN-9194](https://issues.apache.org/jira/browse/YARN-9194) | Invalid event: REGISTERED and LAUNCH\_FAILED at FAILED, and NullPointerException happens in RM while shutdown a NM | Critical | . | lujie | lujie |
| [YARN-9204](https://issues.apache.org/jira/browse/YARN-9204) | RM fails to start if absolute resource is specified for partition capacity in CS queues | Blocker | yarn | Jiandan Yang | Jiandan Yang |
| [HDFS-14207](https://issues.apache.org/jira/browse/HDFS-14207) | ZKFC should catch exception when ha configuration missing | Major | hdfs | Fei Hui | Fei Hui |
| [HDFS-14218](https://issues.apache.org/jira/browse/HDFS-14218) | EC: Ls -e throw NPE when directory ec policy is disabled | Major | . | Surendra Singh Lilhore | Ayush Saxena |
| [YARN-9210](https://issues.apache.org/jira/browse/YARN-9210) | RM nodes web page can not display node info | Blocker | yarn | Jiandan Yang | Jiandan Yang |
| [YARN-9205](https://issues.apache.org/jira/browse/YARN-9205) | When using custom resource type, application will fail to run due to the CapacityScheduler throws InvalidResourceRequestException(GREATER\_THEN\_MAX\_ALLOCATION) | Critical | . | Zhankun Tang | Zhankun Tang |
| [YARN-8961](https://issues.apache.org/jira/browse/YARN-8961) | [UI2] Flow Run End Time shows 'Invalid date' | Major | . | Charan Hebri | Akhil PB |
| [HADOOP-16065](https://issues.apache.org/jira/browse/HADOOP-16065) | -Ddynamodb should be -Ddynamo in AWS SDK testing document | Minor | documentation | Akira Ajisaka | Akira Ajisaka |
| [HDFS-14228](https://issues.apache.org/jira/browse/HDFS-14228) | Incorrect getSnapshottableDirListing() javadoc | Major | snapshots | Wei-Chiu Chuang | Dinesh Chitlangia |
| [YARN-9222](https://issues.apache.org/jira/browse/YARN-9222) | Print launchTime in ApplicationSummary | Major | . | Jonathan Hung | Jonathan Hung |
| [YARN-8901](https://issues.apache.org/jira/browse/YARN-8901) | Restart "NEVER" policy does not work with component dependency | Critical | . | Yesha Vora | Suma Shivaprasad |
| [YARN-9237](https://issues.apache.org/jira/browse/YARN-9237) | NM should ignore sending finished apps to RM during RM fail-over | Major | yarn | Jiandan Yang | Jiandan Yang |
| [YARN-6616](https://issues.apache.org/jira/browse/YARN-6616) | YARN AHS shows submitTime for jobs same as startTime | Minor | . | Prabhu Joseph | Prabhu Joseph |
| [YARN-9099](https://issues.apache.org/jira/browse/YARN-9099) | GpuResourceAllocator#getReleasingGpus calculates number of GPUs in a wrong way | Major | . | Szilard Nemeth | Szilard Nemeth |
| [YARN-9262](https://issues.apache.org/jira/browse/YARN-9262) | TestRMAppAttemptTransitions is failing with an NPE | Critical | resourcemanager | Sunil Govindan | lujie |
| [HDFS-14232](https://issues.apache.org/jira/browse/HDFS-14232) | libhdfs is not included in binary tarball | Critical | build, libhdfs | Akira Ajisaka | Akira Ajisaka |
| [MAPREDUCE-7177](https://issues.apache.org/jira/browse/MAPREDUCE-7177) | Disable speculative execution in TestDFSIO | Major | . | Kihwal Lee | Zhaohui Xin |
| [HADOOP-16076](https://issues.apache.org/jira/browse/HADOOP-16076) | SPNEGO+SSL Client Connections with HttpClient Broken | Major | build, security | Larry McCay | Larry McCay |
| [HADOOP-16074](https://issues.apache.org/jira/browse/HADOOP-16074) | WASB: Update container not found error code | Major | fs/azure | Da Zhou | Da Zhou |
| [YARN-8498](https://issues.apache.org/jira/browse/YARN-8498) | Yarn NodeManager OOM Listener Fails Compilation on Ubuntu 18.04 | Blocker | . | Jack Bearden | Ayush Saxena |
| [YARN-9206](https://issues.apache.org/jira/browse/YARN-9206) | RMServerUtils does not count SHUTDOWN as an accepted state | Major | . | Kuhu Shukla | Kuhu Shukla |
| [HADOOP-16032](https://issues.apache.org/jira/browse/HADOOP-16032) | Distcp It should clear sub directory ACL before applying new ACL on it. | Major | tools/distcp | Ranith Sardar | Ranith Sardar |
| [HDFS-14140](https://issues.apache.org/jira/browse/HDFS-14140) | JournalNodeSyncer authentication is failing in secure cluster | Major | journal-node, security | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [YARN-9257](https://issues.apache.org/jira/browse/YARN-9257) | Distributed Shell client throws a NPE for a non-existent queue | Major | distributed-shell | Charan Hebri | Charan Hebri |
| [YARN-8761](https://issues.apache.org/jira/browse/YARN-8761) | Service AM support for decommissioning component instances | Major | . | Billie Rinaldi | Billie Rinaldi |
| [HDFS-14266](https://issues.apache.org/jira/browse/HDFS-14266) | EC : Fsck -blockId shows null for EC Blocks if One Block Is Not Available. | Major | . | Harshakiran Reddy | Ayush Saxena |
| [HDFS-14274](https://issues.apache.org/jira/browse/HDFS-14274) | EC: NPE While Listing EC Policy For A Directory Following Replication Policy. | Major | erasure-coding | Souryakanta Dwivedy | Ayush Saxena |
| [HDFS-14263](https://issues.apache.org/jira/browse/HDFS-14263) | Remove unnecessary block file exists check from FsDatasetImpl#getBlockInputStream() | Major | datanode | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [YARN-7761](https://issues.apache.org/jira/browse/YARN-7761) | [UI2] Clicking 'master container log' or 'Link' next to 'log' under application's appAttempt goes to Old UI's Log link | Major | yarn-ui-v2 | Sumana Sathish | Akhil PB |
| [YARN-9295](https://issues.apache.org/jira/browse/YARN-9295) | [UI2] Fix label typo in Cluster Overview page | Trivial | yarn-ui-v2 | Charan Hebri | Charan Hebri |
| [YARN-9308](https://issues.apache.org/jira/browse/YARN-9308) | fairscheduler-statedump.log gets generated regardless of service again after the merge of HDFS-7240 | Blocker | fairscheduler, scheduler | Akira Ajisaka | Wilfred Spiegelenburg |
| [YARN-9284](https://issues.apache.org/jira/browse/YARN-9284) | Fix the unit of yarn.service.am-resource.memory in the document | Minor | documentation, yarn-native-services | Masahiro Tanaka | Masahiro Tanaka |
| [YARN-9283](https://issues.apache.org/jira/browse/YARN-9283) | Javadoc of LinuxContainerExecutor#addSchedPriorityCommand has a wrong property name as reference | Minor | documentation | Szilard Nemeth | Adam Antal |
| [YARN-9286](https://issues.apache.org/jira/browse/YARN-9286) | [Timeline Server] Sorting based on FinalStatus shows pop-up message | Minor | timelineserver | Nallasivan | Bilwa S T |
| [HDFS-14081](https://issues.apache.org/jira/browse/HDFS-14081) | hdfs dfsadmin -metasave metasave\_test results NPE | Major | hdfs | Shweta | Shweta |
| [HADOOP-15813](https://issues.apache.org/jira/browse/HADOOP-15813) | Enable more reliable SSL connection reuse | Major | common | Daryn Sharp | Daryn Sharp |
| [HDFS-14216](https://issues.apache.org/jira/browse/HDFS-14216) | NullPointerException happens in NamenodeWebHdfs | Critical | . | lujie | lujie |
| [HADOOP-16105](https://issues.apache.org/jira/browse/HADOOP-16105) | WASB in secure mode does not set connectingUsingSAS | Major | fs/azure | Steve Loughran | Steve Loughran |
| [YARN-9238](https://issues.apache.org/jira/browse/YARN-9238) | Avoid allocating opportunistic containers to previous/removed/non-exist application attempt | Critical | . | lujie | lujie |
| [YARN-9118](https://issues.apache.org/jira/browse/YARN-9118) | Handle exceptions with parsing user defined GPU devices in GpuDiscoverer | Major | . | Szilard Nemeth | Szilard Nemeth |
| [YARN-9317](https://issues.apache.org/jira/browse/YARN-9317) | Avoid repeated YarnConfiguration#timelineServiceV2Enabled check | Major | . | Bibin A Chundatt | Prabhu Joseph |
| [YARN-9213](https://issues.apache.org/jira/browse/YARN-9213) | RM Web UI v1 does not show custom resource allocations for containers page | Major | . | Szilard Nemeth | Szilard Nemeth |
| [YARN-9329](https://issues.apache.org/jira/browse/YARN-9329) | updatePriority is blocked when using FairScheduler | Major | . | Jiandan Yang | Jiandan Yang |
| [YARN-9248](https://issues.apache.org/jira/browse/YARN-9248) | RMContainerImpl:Invalid event: ACQUIRED at KILLED | Major | . | lujie | lujie |
| [HADOOP-16018](https://issues.apache.org/jira/browse/HADOOP-16018) | DistCp won't reassemble chunks when blocks per chunk \> 0 | Major | tools/distcp | Kai Xie | Kai Xie |
| [YARN-9334](https://issues.apache.org/jira/browse/YARN-9334) | YARN Service Client does not work with SPNEGO when knox is configured | Major | yarn-native-services | Tarun Parimi | Billie Rinaldi |
| [HDFS-14305](https://issues.apache.org/jira/browse/HDFS-14305) | Serial number in BlockTokenSecretManager could overlap between different namenodes | Major | namenode, security | Chao Sun | He Xiaoqiao |
| [HDFS-14314](https://issues.apache.org/jira/browse/HDFS-14314) | fullBlockReportLeaseId should be reset after registering to NN | Critical | datanode | star | star |
| [YARN-8803](https://issues.apache.org/jira/browse/YARN-8803) | [UI2] Show flow runs in the order of recently created time in graph widgets | Major | yarn-ui-v2 | Akhil PB | Akhil PB |
| [HDFS-14317](https://issues.apache.org/jira/browse/HDFS-14317) | Standby does not trigger edit log rolling when in-progress edit log tailing is enabled | Critical | . | Ekanth Sethuramalingam | Ekanth Sethuramalingam |
| [HDFS-14333](https://issues.apache.org/jira/browse/HDFS-14333) | Datanode fails to start if any disk has errors during Namenode registration | Major | datanode | Stephen O'Donnell | Stephen O'Donnell |
| [HADOOP-16192](https://issues.apache.org/jira/browse/HADOOP-16192) | CallQueue backoff bug fixes: doesn't perform backoff when add() is used, and doesn't update backoff when refreshed | Major | ipc | Erik Krogen | Erik Krogen |
| [HDFS-14037](https://issues.apache.org/jira/browse/HDFS-14037) | Fix SSLFactory truststore reloader thread leak in URLConnectionFactory | Major | hdfs-client, webhdfs | Takanobu Asanuma | Takanobu Asanuma |
| [HADOOP-16225](https://issues.apache.org/jira/browse/HADOOP-16225) | Fix links to the developer mailing lists in DownstreamDev.md | Minor | documentation | Akira Ajisaka | Wanqiang Ji |
| [HADOOP-16226](https://issues.apache.org/jira/browse/HADOOP-16226) | new Path(String str) does not remove all the trailing slashes of str | Minor | fs | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-16232](https://issues.apache.org/jira/browse/HADOOP-16232) | Fix errors in the checkstyle configration xmls | Major | build | Akira Ajisaka | Wanqiang Ji |
| [HDFS-14389](https://issues.apache.org/jira/browse/HDFS-14389) | getAclStatus returns incorrect permissions and owner when an iNodeAttributeProvider is configured | Major | namenode | Stephen O'Donnell | Stephen O'Donnell |
| [HDFS-14407](https://issues.apache.org/jira/browse/HDFS-14407) | Fix misuse of SLF4j logging API in DatasetVolumeChecker#checkAllVolumes | Minor | . | Wanqiang Ji | Wanqiang Ji |
| [YARN-9413](https://issues.apache.org/jira/browse/YARN-9413) | Queue resource leak after app fail for CapacityScheduler | Major | capacityscheduler | Tao Yang | Tao Yang |
| [HADOOP-14635](https://issues.apache.org/jira/browse/HADOOP-14635) | Javadoc correction for AccessControlList#buildACL | Minor | documentation | Bibin A Chundatt | Yeliang Cang |
| [HADOOP-14544](https://issues.apache.org/jira/browse/HADOOP-14544) | DistCp documentation for command line options is misaligned. | Minor | documentation | Chris Nauroth | Masatake Iwasaki |
| [HDFS-10477](https://issues.apache.org/jira/browse/HDFS-10477) | Stop decommission a rack of DataNodes caused NameNode fail over to standby | Major | namenode | yunjiong zhao | yunjiong zhao |
| [YARN-9487](https://issues.apache.org/jira/browse/YARN-9487) | NodeManager native build shouldn't link against librt on macOS | Major | nodemanager | Siyao Meng | Siyao Meng |
| [YARN-6695](https://issues.apache.org/jira/browse/YARN-6695) | Race condition in RM for publishing container events vs appFinished events causes NPE | Critical | . | Rohith Sharma K S | Prabhu Joseph |
| [YARN-8622](https://issues.apache.org/jira/browse/YARN-8622) | NodeManager native build fails due to getgrouplist not found on macOS | Major | nodemanager | Ewan Higgs | Siyao Meng |
| [HADOOP-16265](https://issues.apache.org/jira/browse/HADOOP-16265) | Configuration#getTimeDuration is not consistent between default value and manual settings. | Major | . | star | star |
| [HDFS-13677](https://issues.apache.org/jira/browse/HDFS-13677) | Dynamic refresh Disk configuration results in overwriting VolumeMap | Blocker | . | xuzq | xuzq |
| [YARN-9285](https://issues.apache.org/jira/browse/YARN-9285) | RM UI progress column is of wrong type | Minor | yarn | Ahmed Hussein | Ahmed Hussein |
| [HADOOP-16278](https://issues.apache.org/jira/browse/HADOOP-16278) | With S3A Filesystem, Long Running services End up Doing lot of GC and eventually die | Major | common, hadoop-aws, metrics | Rajat Khandelwal | Rajat Khandelwal |
| [YARN-9504](https://issues.apache.org/jira/browse/YARN-9504) | [UI2] Fair scheduler queue view page does not show actual capacity | Major | fairscheduler, yarn-ui-v2 | Zoltan Siegl | Zoltan Siegl |
| [YARN-9519](https://issues.apache.org/jira/browse/YARN-9519) | TFile log aggregation file format is not working for yarn.log-aggregation.TFile.remote-app-log-dir config | Major | log-aggregation | Adam Antal | Adam Antal |
| [YARN-9508](https://issues.apache.org/jira/browse/YARN-9508) | YarnConfiguration areNodeLabel enabled is costly in allocation flow | Critical | . | Bibin A Chundatt | Bilwa S T |
| [HADOOP-16247](https://issues.apache.org/jira/browse/HADOOP-16247) | NPE in FsUrlConnection | Major | hdfs-client | Karthik Palanisamy | Karthik Palanisamy |
| [HADOOP-16248](https://issues.apache.org/jira/browse/HADOOP-16248) | MutableQuantiles leak memory under heavy load | Major | metrics | Alexis Daboville | Alexis Daboville |
| [HDFS-14323](https://issues.apache.org/jira/browse/HDFS-14323) | Distcp fails in Hadoop 3.x when 2.x source webhdfs url has special characters in hdfs file path | Major | webhdfs | Srinivasu Majeti | Srinivasu Majeti |
| [MAPREDUCE-7205](https://issues.apache.org/jira/browse/MAPREDUCE-7205) | Treat container scheduler kill exit code as a task attempt killing event | Major | applicationmaster, mr-am, mrv2 | Wanqiang Ji | Wanqiang Ji |
| [HDFS-14500](https://issues.apache.org/jira/browse/HDFS-14500) | NameNode StartupProgress continues to report edit log segments after the LOADING\_EDITS phase is finished | Major | namenode | Erik Krogen | Erik Krogen |
| [YARN-9500](https://issues.apache.org/jira/browse/YARN-9500) | Fix typos in ResourceModel.md | Trivial | documentation | leiqiang | leiqiang |
| [HADOOP-16331](https://issues.apache.org/jira/browse/HADOOP-16331) | Fix ASF License check in pom.xml | Major | . | Wanqiang Ji | Akira Ajisaka |
| [YARN-9542](https://issues.apache.org/jira/browse/YARN-9542) | Fix LogsCLI guessAppOwner ignores custom file format suffix | Minor | log-aggregation | Prabhu Joseph | Prabhu Joseph |
| [HDFS-14512](https://issues.apache.org/jira/browse/HDFS-14512) | ONE\_SSD policy will be violated while write data with DistributedFileSystem.create(....favoredNodes) | Major | . | Shen Yinjie | Ayush Saxena |
| [HADOOP-16334](https://issues.apache.org/jira/browse/HADOOP-16334) | Fix yetus-wrapper not working when HADOOP\_YETUS\_VERSION \>= 0.9.0 | Major | yetus | Wanqiang Ji | Wanqiang Ji |
| [HDFS-14521](https://issues.apache.org/jira/browse/HDFS-14521) | Suppress setReplication logging. | Major | . | Kihwal Lee | Kihwal Lee |
| [YARN-9507](https://issues.apache.org/jira/browse/YARN-9507) | Fix NPE in NodeManager#serviceStop on startup failure | Minor | . | Bilwa S T | Bilwa S T |
| [YARN-8947](https://issues.apache.org/jira/browse/YARN-8947) | [UI2] Active User info missing from UI2 | Major | yarn-ui-v2 | Akhil PB | Akhil PB |
| [YARN-8906](https://issues.apache.org/jira/browse/YARN-8906) | [UI2] NM hostnames not displayed correctly in Node Heatmap Chart | Major | . | Charan Hebri | Akhil PB |
| [YARN-9580](https://issues.apache.org/jira/browse/YARN-9580) | Fulfilled reservation information in assignment is lost when transferring in ParentQueue#assignContainers | Major | capacityscheduler | Tao Yang | Tao Yang |
| [YARN-8625](https://issues.apache.org/jira/browse/YARN-8625) | Aggregate Resource Allocation for each job is not present in ATS | Major | ATSv2 | Prabhu Joseph | Prabhu Joseph |
| [HADOOP-16345](https://issues.apache.org/jira/browse/HADOOP-16345) | Potential NPE when instantiating FairCallQueue metrics | Major | ipc | Erik Krogen | Erik Krogen |
| [YARN-9594](https://issues.apache.org/jira/browse/YARN-9594) | Fix missing break statement in ContainerScheduler#handle | Major | . | lujie | lujie |
| [YARN-9565](https://issues.apache.org/jira/browse/YARN-9565) | RMAppImpl#ranNodes not cleared on FinalTransition | Major | . | Bibin A Chundatt | Bilwa S T |
| [YARN-9547](https://issues.apache.org/jira/browse/YARN-9547) | ContainerStatusPBImpl default execution type is not returned | Major | . | Bibin A Chundatt | Bilwa S T |
| [HDFS-13231](https://issues.apache.org/jira/browse/HDFS-13231) | Extend visualization for Decommissioning, Maintenance Mode under Datanode tab in the NameNode UI | Major | datanode, namenode | Haibo Yan | Stephen O'Donnell |
| [HDFS-14535](https://issues.apache.org/jira/browse/HDFS-14535) | The default 8KB buffer in requestFileDescriptors#BufferedOutputStream is causing lots of heap allocation in HBase when using short-circut read | Major | hdfs-client | Zheng Hu | Zheng Hu |
| [HDFS-13730](https://issues.apache.org/jira/browse/HDFS-13730) | BlockReaderRemote.sendReadResult throws NPE | Major | hdfs-client | Wei-Chiu Chuang | Yuanbo Liu |
| [YARN-9584](https://issues.apache.org/jira/browse/YARN-9584) | Should put initializeProcessTrees method call before get pid | Critical | nodemanager | Wanqiang Ji | Wanqiang Ji |
| [HDFS-14010](https://issues.apache.org/jira/browse/HDFS-14010) | Pass correct DF usage to ReservedSpaceCalculator builder | Minor | . | Lukas Majercak | Lukas Majercak |
| [HDFS-14078](https://issues.apache.org/jira/browse/HDFS-14078) | Admin helper fails to prettify NullPointerExceptions | Major | . | Elek, Marton | Elek, Marton |
| [HDFS-14101](https://issues.apache.org/jira/browse/HDFS-14101) | Random failure of testListCorruptFilesCorruptedBlock | Major | test | Kihwal Lee | Zsolt Venczel |
| [HDFS-14465](https://issues.apache.org/jira/browse/HDFS-14465) | When the Block expected replications is larger than the number of DataNodes, entering maintenance will never exit. | Major | . | Yicong Cai | Yicong Cai |
| [HDFS-13893](https://issues.apache.org/jira/browse/HDFS-13893) | DiskBalancer: no validations for Disk balancer commands | Major | diskbalancer | Harshakiran Reddy | Lokesh Jain |
| [YARN-9209](https://issues.apache.org/jira/browse/YARN-9209) | When nodePartition is not set in Placement Constraints, containers are allocated only in default partition | Major | capacity scheduler, scheduler | Tarun Parimi | Tarun Parimi |
| [HDFS-12487](https://issues.apache.org/jira/browse/HDFS-12487) | FsDatasetSpi.isValidBlock() lacks null pointer check inside and neither do the callers | Major | balancer & mover, diskbalancer | liumi | liumi |
| [HDFS-14074](https://issues.apache.org/jira/browse/HDFS-14074) | DataNode runs async disk checks maybe throws NullPointerException, and DataNode failed to register to NameSpace. | Major | hdfs | guangyi lu | guangyi lu |
| [HDFS-14541](https://issues.apache.org/jira/browse/HDFS-14541) | When evictableMmapped or evictable size is zero, do not throw NoSuchElementException | Major | hdfs-client, performance | Zheng Hu | Lisheng Sun |
| [HDFS-14598](https://issues.apache.org/jira/browse/HDFS-14598) | Findbugs warning caused by HDFS-12487 | Minor | diskbalancer | Wei-Chiu Chuang | He Xiaoqiao |
| [YARN-9639](https://issues.apache.org/jira/browse/YARN-9639) | DecommissioningNodesWatcher cause memory leak | Blocker | . | Bibin A Chundatt | Bilwa S T |
| [YARN-9581](https://issues.apache.org/jira/browse/YARN-9581) | Fix WebAppUtils#getRMWebAppURLWithScheme ignores rm2 | Major | client | Prabhu Joseph | Prabhu Joseph |
| [YARN-9327](https://issues.apache.org/jira/browse/YARN-9327) | Improve synchronisation in ProtoUtils#convertToProtoFormat block | Critical | . | Bibin A Chundatt | Bibin A Chundatt |
| [YARN-9655](https://issues.apache.org/jira/browse/YARN-9655) | AllocateResponse in FederationInterceptor lost applicationPriority | Major | federation | hunshenshi | hunshenshi |
| [HADOOP-16385](https://issues.apache.org/jira/browse/HADOOP-16385) | Namenode crashes with "RedundancyMonitor thread received Runtime exception" | Major | . | krishna reddy | Ayush Saxena |
| [YARN-9644](https://issues.apache.org/jira/browse/YARN-9644) | First RMContext object is always leaked during switch over | Blocker | . | Bibin A Chundatt | Bibin A Chundatt |
| [HDFS-14629](https://issues.apache.org/jira/browse/HDFS-14629) | Property value Hard Coded in DNConf.java | Trivial | . | hemanthboyina | hemanthboyina |
| [YARN-9557](https://issues.apache.org/jira/browse/YARN-9557) | Application fails in diskchecker when ReadWriteDiskValidator is configured. | Critical | nodemanager | Anuruddh Nayak | Bilwa S T |
| [HDFS-12703](https://issues.apache.org/jira/browse/HDFS-12703) | Exceptions are fatal to decommissioning monitor | Critical | namenode | Daryn Sharp | He Xiaoqiao |
| [HDFS-12748](https://issues.apache.org/jira/browse/HDFS-12748) | NameNode memory leak when accessing webhdfs GETHOMEDIRECTORY | Major | hdfs | Jiandan Yang | Weiwei Yang |
| [YARN-9625](https://issues.apache.org/jira/browse/YARN-9625) | UI2 - No link to a queue on the Queues page for Fair Scheduler | Major | . | Charan Hebri | Zoltan Siegl |
| [HDFS-14466](https://issues.apache.org/jira/browse/HDFS-14466) | Add a regression test for HDFS-14323 | Minor | fs, test, webhdfs | Yuya Ebihara | Masatake Iwasaki |
| [YARN-9235](https://issues.apache.org/jira/browse/YARN-9235) | If linux container executor is not set for a GPU cluster GpuResourceHandlerImpl is not initialized and NPE is thrown | Major | yarn | Antal Bálint Steinbach | Adam Antal |
| [YARN-9626](https://issues.apache.org/jira/browse/YARN-9626) | UI2 - Fair scheduler queue apps page issues | Major | . | Charan Hebri | Zoltan Siegl |
| [YARN-9645](https://issues.apache.org/jira/browse/YARN-9645) | Fix Invalid event FINISHED\_CONTAINERS\_PULLED\_BY\_AM at NEW on NM restart | Major | . | krishna reddy | Bilwa S T |
| [YARN-9682](https://issues.apache.org/jira/browse/YARN-9682) | Wrong log message when finalizing the upgrade | Trivial | . | kyungwan nam | kyungwan nam |
| [HADOOP-16440](https://issues.apache.org/jira/browse/HADOOP-16440) | Distcp can not preserve timestamp with -delete option | Major | . | ludun | ludun |
| [MAPREDUCE-7076](https://issues.apache.org/jira/browse/MAPREDUCE-7076) | TestNNBench#testNNBenchCreateReadAndDelete failing in our internal build | Minor | test | Rushabh S Shah | kevin su |
| [HADOOP-16443](https://issues.apache.org/jira/browse/HADOOP-16443) | Improve help text for setfacl --set option | Minor | fs | Stephen O'Donnell | Stephen O'Donnell |
| [YARN-9668](https://issues.apache.org/jira/browse/YARN-9668) | UGI conf doesn't read user overridden configurations on RM and NM startup | Major | . | Jonathan Hung | Jonathan Hung |
| [HADOOP-9844](https://issues.apache.org/jira/browse/HADOOP-9844) | NPE when trying to create an error message response of SASL RPC | Major | ipc | Steve Loughran | Steve Loughran |
| [HADOOP-16245](https://issues.apache.org/jira/browse/HADOOP-16245) | Enabling SSL within LdapGroupsMapping can break system SSL configs | Major | common, security | Erik Krogen | Erik Krogen |
| [HDFS-14429](https://issues.apache.org/jira/browse/HDFS-14429) | Block remain in COMMITTED but not COMPLETE caused by Decommission | Major | . | Yicong Cai | Yicong Cai |
| [HADOOP-16435](https://issues.apache.org/jira/browse/HADOOP-16435) | RpcMetrics should not be retained forever | Critical | rpc-server | Zoltan Haindrich | Zoltan Haindrich |
| [YARN-9596](https://issues.apache.org/jira/browse/YARN-9596) | QueueMetrics has incorrect metrics when labelled partitions are involved | Major | capacity scheduler | Muhammad Samir Khan | Muhammad Samir Khan |
| [MAPREDUCE-7225](https://issues.apache.org/jira/browse/MAPREDUCE-7225) | Fix broken current folder expansion during MR job start | Major | mrv2 | Adam Antal | Peter Bacsko |
| [HDFS-13529](https://issues.apache.org/jira/browse/HDFS-13529) | Fix default trash policy emptier trigger time correctly | Major | namenode | He Xiaoqiao | He Xiaoqiao |
| [HADOOP-15681](https://issues.apache.org/jira/browse/HADOOP-15681) | AuthenticationFilter should generate valid date format for Set-Cookie header regardless of default Locale | Minor | security | Cao Manh Dat | Cao Manh Dat |
| [HDFS-14685](https://issues.apache.org/jira/browse/HDFS-14685) | DefaultAuditLogger doesn't print CallerContext | Major | hdfs | xuzq | xuzq |
| [HDFS-14462](https://issues.apache.org/jira/browse/HDFS-14462) | WebHDFS throws "Error writing request body to server" instead of DSQuotaExceededException | Major | webhdfs | Erik Krogen | Simbarashe Dzinamarira |
| [HDFS-14691](https://issues.apache.org/jira/browse/HDFS-14691) | Wrong usage hint for hadoop fs command test | Minor | hdfs | Jianfei Jiang | Jianfei Jiang |
| [HDFS-14557](https://issues.apache.org/jira/browse/HDFS-14557) | JournalNode error: Can't scan a pre-transactional edit log | Major | ha | Wei-Chiu Chuang | Stephen O'Donnell |
| [HDFS-14692](https://issues.apache.org/jira/browse/HDFS-14692) | Upload button should not encode complete url | Major | . | Lokesh Jain | Lokesh Jain |
| [HADOOP-15908](https://issues.apache.org/jira/browse/HADOOP-15908) | hadoop-build-tools jar is downloaded from remote repository instead of using from local | Minor | build | Oleksandr Shevchenko | Oleksandr Shevchenko |
| [HDFS-14631](https://issues.apache.org/jira/browse/HDFS-14631) | The DirectoryScanner doesn't fix the wrongly placed replica. | Major | . | Jinglun | Jinglun |
| [YARN-9685](https://issues.apache.org/jira/browse/YARN-9685) | NPE when rendering the info table of leaf queue in non-accessible partitions | Major | capacityscheduler | Tao Yang | Tao Yang |
| [HDFS-14459](https://issues.apache.org/jira/browse/HDFS-14459) | ClosedChannelException silently ignored in FsVolumeList.addBlockPool() | Major | datanode | Stephen O'Donnell | Stephen O'Donnell |
| [HDFS-13359](https://issues.apache.org/jira/browse/HDFS-13359) | DataXceiver hung due to the lock in FsDatasetImpl#getBlockInputStream | Major | datanode | Yiqun Lin | Yiqun Lin |
| [YARN-9451](https://issues.apache.org/jira/browse/YARN-9451) | AggregatedLogsBlock shows wrong NM http port | Minor | nodemanager | Prabhu Joseph | Prabhu Joseph |
| [YARN-9723](https://issues.apache.org/jira/browse/YARN-9723) | ApplicationPlacementContext is not required for terminated jobs during recovery | Major | resourcemanager | Prabhu Joseph | Prabhu Joseph |
| [HDFS-12914](https://issues.apache.org/jira/browse/HDFS-12914) | Block report leases cause missing blocks until next report | Critical | namenode | Daryn Sharp | Santosh Marella |
| [HDFS-14148](https://issues.apache.org/jira/browse/HDFS-14148) | HDFS OIV ReverseXML SnapshotSection parser throws exception when there are more than one snapshottable directory | Major | hdfs | Siyao Meng | Siyao Meng |
| [HDFS-14595](https://issues.apache.org/jira/browse/HDFS-14595) | HDFS-11848 breaks API compatibility | Blocker | . | Wei-Chiu Chuang | Siyao Meng |
| [HDFS-14423](https://issues.apache.org/jira/browse/HDFS-14423) | Percent (%) and plus (+) characters no longer work in WebHDFS | Major | webhdfs | Jing Wang | Masatake Iwasaki |
| [MAPREDUCE-7230](https://issues.apache.org/jira/browse/MAPREDUCE-7230) | TestHSWebApp.testLogsViewSingle fails | Major | jobhistoryserver, test | Prabhu Joseph | Prabhu Joseph |
| [YARN-9749](https://issues.apache.org/jira/browse/YARN-9749) | TestAppLogAggregatorImpl#testDFSQuotaExceeded fails on trunk | Major | log-aggregation, test | Peter Bacsko | Adam Antal |
| [HDFS-14687](https://issues.apache.org/jira/browse/HDFS-14687) | Standby Namenode never come out of safemode when EC files are being written. | Critical | ec, namenode | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [HDFS-13101](https://issues.apache.org/jira/browse/HDFS-13101) | Yet another fsimage corruption related to snapshot | Major | snapshots | Yongjun Zhang | Shashikant Banerjee |
| [HDFS-13201](https://issues.apache.org/jira/browse/HDFS-13201) | Fix prompt message in testPolicyAndStateCantBeNull | Minor | . | chencan | chencan |
| [HDFS-14311](https://issues.apache.org/jira/browse/HDFS-14311) | Multi-threading conflict at layoutVersion when loading block pool storage | Major | rolling upgrades | Yicong Cai | Yicong Cai |
| [HDFS-14582](https://issues.apache.org/jira/browse/HDFS-14582) | Failed to start DN with ArithmeticException when NULL checksum used | Major | datanode | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [YARN-9217](https://issues.apache.org/jira/browse/YARN-9217) | Nodemanager will fail to start if GPU is misconfigured on the node or GPU drivers missing | Major | yarn | Antal Bálint Steinbach | Peter Bacsko |
| [HADOOP-16494](https://issues.apache.org/jira/browse/HADOOP-16494) | Add SHA-256 or SHA-512 checksum to release artifacts to comply with the release distribution policy | Blocker | build | Akira Ajisaka | Akira Ajisaka |
| [YARN-9774](https://issues.apache.org/jira/browse/YARN-9774) | Fix order of arguments for assertEquals in TestSLSUtils | Minor | test | Nikhil Navadiya | Nikhil Navadiya |
| [HDFS-13596](https://issues.apache.org/jira/browse/HDFS-13596) | NN restart fails after RollingUpgrade from 2.x to 3.x | Blocker | hdfs | Hanisha Koneru | Fei Hui |
| [HDFS-14396](https://issues.apache.org/jira/browse/HDFS-14396) | Failed to load image from FSImageFile when downgrade from 3.x to 2.x | Blocker | rolling upgrades | Fei Hui | Fei Hui |
| [YARN-8917](https://issues.apache.org/jira/browse/YARN-8917) | Absolute (maximum) capacity of level3+ queues is wrongly calculated for absolute resource | Critical | capacityscheduler | Tao Yang | Tao Yang |
| [YARN-9642](https://issues.apache.org/jira/browse/YARN-9642) | Fix Memory Leak in AbstractYarnScheduler caused by timer | Blocker | resourcemanager | Bibin A Chundatt | Bibin A Chundatt |
| [HDFS-13977](https://issues.apache.org/jira/browse/HDFS-13977) | NameNode can kill itself if it tries to send too many txns to a QJM simultaneously | Major | namenode, qjm | Erik Krogen | Erik Krogen |
| [HDFS-2470](https://issues.apache.org/jira/browse/HDFS-2470) | NN should automatically set permissions on dfs.namenode.\*.dir | Major | namenode | Aaron T. Myers | Siddharth Wagle |
| [YARN-9438](https://issues.apache.org/jira/browse/YARN-9438) | launchTime not written to state store for running applications | Major | . | Jonathan Hung | Jonathan Hung |
| [YARN-9640](https://issues.apache.org/jira/browse/YARN-9640) | Slow event processing could cause too many attempt unregister events | Critical | . | Bibin A Chundatt | Bibin A Chundatt |
| [HDFS-12212](https://issues.apache.org/jira/browse/HDFS-12212) | Options.Rename.To\_TRASH is considered even when Options.Rename.NONE is specified | Major | namenode | Vinayakumar B | Vinayakumar B |
| [YARN-9714](https://issues.apache.org/jira/browse/YARN-9714) | ZooKeeper connection in ZKRMStateStore leaks after RM transitioned to standby | Major | resourcemanager | Tao Yang | Tao Yang |
| [HDFS-8178](https://issues.apache.org/jira/browse/HDFS-8178) | QJM doesn't move aside stale inprogress edits files | Major | qjm | Zhe Zhang | Istvan Fajth |
| [HDFS-14706](https://issues.apache.org/jira/browse/HDFS-14706) | Checksums are not checked if block meta file is less than 7 bytes | Major | . | Stephen O'Donnell | Stephen O'Donnell |
| [YARN-9797](https://issues.apache.org/jira/browse/YARN-9797) | LeafQueue#activateApplications should use resourceCalculator#fitsIn | Blocker | . | Bibin A Chundatt | Bilwa S T |
| [YARN-9785](https://issues.apache.org/jira/browse/YARN-9785) | Fix DominantResourceCalculator when one resource is zero | Blocker | . | Bilwa S T | Bilwa S T |
| [YARN-9718](https://issues.apache.org/jira/browse/YARN-9718) | Yarn REST API, services endpoint remote command ejection | Major | . | Eric Yang | Eric Yang |
| [HADOOP-16255](https://issues.apache.org/jira/browse/HADOOP-16255) | ChecksumFS.Make FileSystem.rename(path, path, options) doesn't rename checksum | Major | fs | Steve Loughran | Jungtaek Lim |
| [YARN-9817](https://issues.apache.org/jira/browse/YARN-9817) | Fix failing testcases due to not initialized AsyncDispatcher - ArithmeticException: / by zero | Major | test | Prabhu Joseph | Prabhu Joseph |
| [YARN-9813](https://issues.apache.org/jira/browse/YARN-9813) | RM does not start on JDK11 when UIv2 is enabled | Critical | resourcemanager, yarn | Adam Antal | Adam Antal |
| [YARN-9820](https://issues.apache.org/jira/browse/YARN-9820) | RM logs InvalidStateTransitionException when app is submitted | Critical | . | Rohith Sharma K S | Prabhu Joseph |
### TESTS:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [YARN-8907](https://issues.apache.org/jira/browse/YARN-8907) | Modify a logging message in TestCapacityScheduler | Trivial | . | Zhankun Tang | Zhankun Tang |
| [YARN-8904](https://issues.apache.org/jira/browse/YARN-8904) | TestRMDelegationTokens can fail in testRMDTMasterKeyStateOnRollingMasterKey | Minor | test | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [YARN-8944](https://issues.apache.org/jira/browse/YARN-8944) | TestContainerAllocation.testUserLimitAllocationMultipleContainers failure after YARN-8896 | Minor | capacity scheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [YARN-9263](https://issues.apache.org/jira/browse/YARN-9263) | TestConfigurationNodeAttributesProvider fails after Mockito updated | Minor | . | Weiwei Yang | Weiwei Yang |
| [YARN-9315](https://issues.apache.org/jira/browse/YARN-9315) | TestCapacitySchedulerMetrics fails intermittently | Minor | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [YARN-9316](https://issues.apache.org/jira/browse/YARN-9316) | TestPlacementConstraintsUtil#testInterAppConstraintsByAppID fails intermittently | Minor | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [YARN-9324](https://issues.apache.org/jira/browse/YARN-9324) | TestSchedulingRequestContainerAllocation(Async) fails with junit-4.11 | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [YARN-9325](https://issues.apache.org/jira/browse/YARN-9325) | TestQueueManagementDynamicEditPolicy fails intermittent | Minor | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [HDFS-11950](https://issues.apache.org/jira/browse/HDFS-11950) | Disable libhdfs zerocopy test on Mac | Minor | libhdfs | John Zhuge | Akira Ajisaka |
### SUB-TASKS:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [YARN-6989](https://issues.apache.org/jira/browse/YARN-6989) | Ensure timeline service v2 codebase gets UGI from HttpServletRequest in a consistent way | Major | timelineserver | Vrushali C | Abhishek Modi |
| [YARN-8834](https://issues.apache.org/jira/browse/YARN-8834) | Provide Java client for fetching Yarn specific entities from TimelineReader | Critical | timelinereader | Rohith Sharma K S | Abhishek Modi |
| [YARN-3879](https://issues.apache.org/jira/browse/YARN-3879) | [Storage implementation] Create HDFS backing storage implementation for ATS reads | Major | timelineserver | Tsuyoshi Ozawa | Abhishek Modi |
| [YARN-6098](https://issues.apache.org/jira/browse/YARN-6098) | Add documentation for Delete Queue | Major | capacity scheduler, documentation | Naganarasimha G R | Suma Shivaprasad |
| [YARN-8456](https://issues.apache.org/jira/browse/YARN-8456) | Fix a configuration handling bug when user leave FPGA discover executable path configuration default but set OpenCL SDK path environment variable | Major | yarn | Zhankun Tang | Zhankun Tang |
| [HADOOP-15868](https://issues.apache.org/jira/browse/HADOOP-15868) | AliyunOSS: update document for properties of multiple part download, multiple part upload and directory copy | Major | fs/oss | wujinhu | wujinhu |
| [YARN-8871](https://issues.apache.org/jira/browse/YARN-8871) | Document behavior of YARN-5742 | Major | . | Vrushali C | Suma Shivaprasad |
| [YARN-7754](https://issues.apache.org/jira/browse/YARN-7754) | [Atsv2] Update document for running v1 and v2 TS | Major | . | Rohith Sharma K S | Suma Shivaprasad |
| [HDFS-14047](https://issues.apache.org/jira/browse/HDFS-14047) | [libhdfs++] Fix hdfsGetLastExceptionRootCause bug in test\_libhdfs\_threaded.c | Major | libhdfs, native | Anatoli Shein | Anatoli Shein |
| [YARN-8988](https://issues.apache.org/jira/browse/YARN-8988) | Reduce the verbose log on RM heartbeat path when distributed node-attributes is enabled | Major | . | Weiwei Yang | Tao Yang |
| [HADOOP-15846](https://issues.apache.org/jira/browse/HADOOP-15846) | ABFS: fix mask related bugs in setAcl, modifyAclEntries and removeAclEntries. | Major | fs/azure | Thomas Marquardt | junhua gu |
| [HADOOP-15812](https://issues.apache.org/jira/browse/HADOOP-15812) | ABFS: Improve AbfsRestOperationException format to ensure full msg can be displayed on console | Major | fs/azure | Da Zhou | Da Zhou |
| [YARN-8987](https://issues.apache.org/jira/browse/YARN-8987) | Usability improvements node-attributes CLI | Critical | . | Weiwei Yang | Bibin A Chundatt |
| [HADOOP-15876](https://issues.apache.org/jira/browse/HADOOP-15876) | Use keySet().removeAll() to remove multiple keys from Map in AzureBlobFileSystemStore | Minor | fs/azure | Ted Yu | Da Zhou |
| [HADOOP-15917](https://issues.apache.org/jira/browse/HADOOP-15917) | AliyunOSS: fix incorrect ReadOps and WriteOps in statistics | Major | fs/oss | wujinhu | wujinhu |
| [YARN-8303](https://issues.apache.org/jira/browse/YARN-8303) | YarnClient should contact TimelineReader for application/attempt/container report | Critical | . | Rohith Sharma K S | Abhishek Modi |
| [HADOOP-15872](https://issues.apache.org/jira/browse/HADOOP-15872) | ABFS: Update to target 2018-11-09 REST version for ADLS Gen 2 | Major | fs/azure | Thomas Marquardt | junhua gu |
| [HADOOP-15940](https://issues.apache.org/jira/browse/HADOOP-15940) | ABFS: For HNS account, avoid unnecessary get call when doing Rename | Major | fs/azure | Da Zhou | Da Zhou |
| [YARN-8986](https://issues.apache.org/jira/browse/YARN-8986) | publish all exposed ports to random ports when using bridge network | Minor | yarn | dockerzhang | dockerzhang |
| [HADOOP-15932](https://issues.apache.org/jira/browse/HADOOP-15932) | Oozie unable to create sharelib in s3a filesystem | Critical | fs, fs/s3 | Soumitra Sulav | Steve Loughran |
| [YARN-9034](https://issues.apache.org/jira/browse/YARN-9034) | ApplicationCLI should have option to take clusterId | Major | . | Rohith Sharma K S | Rohith Sharma K S |
| [HDFS-13713](https://issues.apache.org/jira/browse/HDFS-13713) | Add specification of Multipart Upload API to FS specification, with contract tests | Blocker | fs, test | Steve Loughran | Ewan Higgs |
| [HADOOP-15968](https://issues.apache.org/jira/browse/HADOOP-15968) | ABFS: add try catch for UGI failure when initializing ABFS | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-15969](https://issues.apache.org/jira/browse/HADOOP-15969) | ABFS: getNamespaceEnabled can fail blocking user access thru ACLs | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-15972](https://issues.apache.org/jira/browse/HADOOP-15972) | ABFS: reduce list page size to to 500 | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-16004](https://issues.apache.org/jira/browse/HADOOP-16004) | ABFS: Convert 404 error response in AbfsInputStream and AbfsOutPutStream to FileNotFoundException | Major | fs/azure | Da Zhou | Da Zhou |
| [YARN-9126](https://issues.apache.org/jira/browse/YARN-9126) | Container reinit always fails in branch-3.2 and trunk | Major | . | Eric Yang | Chandni Singh |
| [YARN-8925](https://issues.apache.org/jira/browse/YARN-8925) | Updating distributed node attributes only when necessary | Major | resourcemanager | Tao Yang | Tao Yang |
| [HADOOP-16009](https://issues.apache.org/jira/browse/HADOOP-16009) | Replace the url of the repository in Apache Hadoop source code | Major | documentation | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-15323](https://issues.apache.org/jira/browse/HADOOP-15323) | AliyunOSS: Improve copy file performance for AliyunOSSFileSystemStore | Major | fs/oss | wujinhu | wujinhu |
| [YARN-6149](https://issues.apache.org/jira/browse/YARN-6149) | Allow port range to be specified while starting NM Timeline collector manager. | Major | timelineserver | Varun Saxena | Abhishek Modi |
| [HADOOP-16040](https://issues.apache.org/jira/browse/HADOOP-16040) | ABFS: Bug fix for tolerateOobAppends configuration | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-15975](https://issues.apache.org/jira/browse/HADOOP-15975) | ABFS: remove timeout check for DELETE and RENAME | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-15662](https://issues.apache.org/jira/browse/HADOOP-15662) | ABFS: Better exception handling of DNS errors | Major | fs/azure | Thomas Marquardt | Da Zhou |
| [HADOOP-16045](https://issues.apache.org/jira/browse/HADOOP-16045) | Don't run TestDU on Windows | Trivial | common, test | Lukas Majercak | Lukas Majercak |
| [HADOOP-16044](https://issues.apache.org/jira/browse/HADOOP-16044) | ABFS: Better exception handling of DNS errors followup | Major | . | Da Zhou | Da Zhou |
| [HADOOP-16048](https://issues.apache.org/jira/browse/HADOOP-16048) | ABFS: Fix Date format parser | Major | fs/azure | Da Zhou | Da Zhou |
| [YARN-8101](https://issues.apache.org/jira/browse/YARN-8101) | Add UT to verify node-attributes in RM nodes rest API | Minor | resourcemanager, restapi | Weiwei Yang | Prabhu Joseph |
| [HADOOP-16041](https://issues.apache.org/jira/browse/HADOOP-16041) | UserAgent string for ABFS | Major | fs/azure | Shweta | Shweta |
| [HADOOP-16079](https://issues.apache.org/jira/browse/HADOOP-16079) | Token.toString faulting if any token listed can't load. | Blocker | security | Steve Loughran | Steve Loughran |
| [YARN-9275](https://issues.apache.org/jira/browse/YARN-9275) | Add link to NodeAttributes doc in PlacementConstraints document | Minor | documentation | Weiwei Yang | Masatake Iwasaki |
| [YARN-6735](https://issues.apache.org/jira/browse/YARN-6735) | Have a way to turn off container metrics from NMs | Major | timelineserver | Vrushali C | Abhishek Modi |
| [HADOOP-15954](https://issues.apache.org/jira/browse/HADOOP-15954) | ABFS: Enable owner and group conversion for MSI and login user using OAuth | Major | fs/azure | junhua gu | Da Zhou |
| [YARN-9253](https://issues.apache.org/jira/browse/YARN-9253) | Add UT to verify Placement Constraint in Distributed Shell | Major | . | Prabhu Joseph | Prabhu Joseph |
| [YARN-9252](https://issues.apache.org/jira/browse/YARN-9252) | Allocation Tag Namespace support in Distributed Shell | Major | distributed-shell | Prabhu Joseph | Prabhu Joseph |
| [YARN-8555](https://issues.apache.org/jira/browse/YARN-8555) | Parameterize TestSchedulingRequestContainerAllocation(Async) to cover both PC handler options | Minor | . | Weiwei Yang | Prabhu Joseph |
| [YARN-9293](https://issues.apache.org/jira/browse/YARN-9293) | Optimize MockAMLauncher event handling | Major | . | Bibin A Chundatt | Bibin A Chundatt |
| [HADOOP-16104](https://issues.apache.org/jira/browse/HADOOP-16104) | Wasb tests to downgrade to skip when test a/c is namespace enabled | Major | fs/azure, test | Steve Loughran | Masatake Iwasaki |
| [YARN-9258](https://issues.apache.org/jira/browse/YARN-9258) | Support to specify allocation tags without constraint in distributed shell CLI | Major | distributed-shell | Prabhu Joseph | Prabhu Joseph |
| [HADOOP-16136](https://issues.apache.org/jira/browse/HADOOP-16136) | ABFS: Should only transform username to short name | Major | . | Da Zhou | Da Zhou |
| [YARN-5336](https://issues.apache.org/jira/browse/YARN-5336) | Limit the flow name size & consider cleanup for hex chars | Major | timelineserver | Vrushali C | Sushil Ks |
| [YARN-3841](https://issues.apache.org/jira/browse/YARN-3841) | [Storage implementation] Adding retry semantics to HDFS backing storage | Major | timelineserver | Tsuyoshi Ozawa | Abhishek Modi |
| [HADOOP-16169](https://issues.apache.org/jira/browse/HADOOP-16169) | ABFS: Bug fix for getPathProperties | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-16109](https://issues.apache.org/jira/browse/HADOOP-16109) | Parquet reading S3AFileSystem causes EOF | Blocker | fs/s3 | Dave Christianson | Steve Loughran |
| [HADOOP-15625](https://issues.apache.org/jira/browse/HADOOP-15625) | S3A input stream to use etags/version number to detect changed source files | Major | fs/s3 | Brahma Reddy Battula | Ben Roling |
| [HADOOP-16124](https://issues.apache.org/jira/browse/HADOOP-16124) | Extend documentation in testing.md about endpoint constants | Trivial | hadoop-aws | Adam Antal | Adam Antal |
| [HADOOP-16191](https://issues.apache.org/jira/browse/HADOOP-16191) | AliyunOSS: improvements for copyFile/copyDirectory and logging | Major | fs/oss | wujinhu | wujinhu |
| [YARN-9387](https://issues.apache.org/jira/browse/YARN-9387) | Update document for ATS HBase Custom tablenames (-entityTableName) | Critical | ATSv2 | Prabhu Joseph | Prabhu Joseph |
| [YARN-9389](https://issues.apache.org/jira/browse/YARN-9389) | FlowActivity and FlowRun table prefix is wrong | Minor | ATSv2 | Prabhu Joseph | Prabhu Joseph |
| [YARN-9391](https://issues.apache.org/jira/browse/YARN-9391) | Disable PATH variable to be passed to Docker container | Major | . | Eric Yang | Jim Brennan |
| [HADOOP-16058](https://issues.apache.org/jira/browse/HADOOP-16058) | S3A tests to include Terasort | Major | fs/s3, test | Steve Loughran | Steve Loughran |
| [HADOOP-16220](https://issues.apache.org/jira/browse/HADOOP-16220) | Add findbugs ignores for unjustified issues during update to guava to 27.0-jre in hadoop-project | Major | . | Gabor Bota | Gabor Bota |
| [YARN-9418](https://issues.apache.org/jira/browse/YARN-9418) | ATSV2 /apps/appId/entities/YARN\_CONTAINER rest api does not show metrics | Critical | ATSv2 | Prabhu Joseph | Prabhu Joseph |
| [HADOOP-16233](https://issues.apache.org/jira/browse/HADOOP-16233) | S3AFileStatus to declare that isEncrypted() is always true | Minor | fs/s3 | Steve Loughran | Steve Loughran |
| [YARN-9303](https://issues.apache.org/jira/browse/YARN-9303) | Username splits won't help timelineservice.app\_flow table | Major | ATSv2 | Prabhu Joseph | Prabhu Joseph |
| [YARN-9382](https://issues.apache.org/jira/browse/YARN-9382) | Publish container killed, paused and resumed events to ATSv2. | Major | . | Abhishek Modi | Abhishek Modi |
| [YARN-9335](https://issues.apache.org/jira/browse/YARN-9335) | [atsv2] Restrict the number of elements held in timeline collector when backend is unreachable for async calls | Major | . | Vrushali C | Abhishek Modi |
| [HADOOP-16269](https://issues.apache.org/jira/browse/HADOOP-16269) | ABFS: add listFileStatus with StartFrom | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-16251](https://issues.apache.org/jira/browse/HADOOP-16251) | ABFS: add FSMainOperationsBaseTest | Major | fs/azure | Da Zhou | Da Zhou |
| [HADOOP-16306](https://issues.apache.org/jira/browse/HADOOP-16306) | AliyunOSS: Remove temporary files when upload small files to OSS | Major | fs/oss | wujinhu | wujinhu |
| [YARN-7537](https://issues.apache.org/jira/browse/YARN-7537) | [Atsv2] load hbase configuration from filesystem rather than URL | Major | . | Rohith Sharma K S | Prabhu Joseph |
| [HDFS-14553](https://issues.apache.org/jira/browse/HDFS-14553) | Make queue size of BlockReportProcessingThread configurable | Major | namenode | He Xiaoqiao | He Xiaoqiao |
| [HADOOP-16211](https://issues.apache.org/jira/browse/HADOOP-16211) | Update guava to 27.0-jre in hadoop-project branch-3.2 | Major | . | Gabor Bota | Gabor Bota |
| [YARN-8499](https://issues.apache.org/jira/browse/YARN-8499) | ATS v2 Generic TimelineStorageMonitor | Major | ATSv2 | Sunil Govindan | Prabhu Joseph |
| [YARN-9374](https://issues.apache.org/jira/browse/YARN-9374) | HBaseTimelineWriterImpl sync writes has to avoid thread blocking if storage down | Major | ATSv2 | Prabhu Joseph | Prabhu Joseph |
| [HADOOP-16401](https://issues.apache.org/jira/browse/HADOOP-16401) | ABFS: port Azure doc to 3.2 branch | Major | fs/azure | Da Zhou | Masatake Iwasaki |
| [HDFS-14034](https://issues.apache.org/jira/browse/HDFS-14034) | Support getQuotaUsage API in WebHDFS | Major | fs, webhdfs | Erik Krogen | Chao Sun |
| [YARN-9765](https://issues.apache.org/jira/browse/YARN-9765) | SLS runner crashes when run with metrics turned off. | Major | . | Abhishek Modi | Abhishek Modi |
| [HDFS-14674](https://issues.apache.org/jira/browse/HDFS-14674) | [SBN read] Got an unexpected txid when tail editlog | Blocker | . | wangzhaohui | wangzhaohui |
| [YARN-9775](https://issues.apache.org/jira/browse/YARN-9775) | RMWebServices /scheduler-conf GET returns all hadoop configurations for ZKConfigurationStore | Major | restapi | Prabhu Joseph | Prabhu Joseph |
| [HDFS-14779](https://issues.apache.org/jira/browse/HDFS-14779) | Fix logging error in TestEditLog#testMultiStreamsLoadEditWithConfMaxTxns | Major | . | Jonathan Hung | Jonathan Hung |
| [YARN-9804](https://issues.apache.org/jira/browse/YARN-9804) | Update ATSv2 document for latest feature supports | Blocker | . | Rohith Sharma K S | Rohith Sharma K S |
| [YARN-9821](https://issues.apache.org/jira/browse/YARN-9821) | NM hangs at serviceStop when ATSV2 Backend Hbase is Down | Major | ATSv2 | Prabhu Joseph | Prabhu Joseph |
### OTHER:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-15851](https://issues.apache.org/jira/browse/HADOOP-15851) | Disable wildfly logs to the console | Major | fs/azure | Vishwajeet Dusane | Vishwajeet Dusane |
| [HDFS-12729](https://issues.apache.org/jira/browse/HDFS-12729) | Document special paths in HDFS | Major | documentation | Chris Douglas | Masatake Iwasaki |
| [YARN-9191](https://issues.apache.org/jira/browse/YARN-9191) | Add cli option in DS to support enforceExecutionType in resource requests. | Major | . | Abhishek Modi | Abhishek Modi |
| [HADOOP-16037](https://issues.apache.org/jira/browse/HADOOP-16037) | DistCp: Document usage of Sync (-diff option) in detail | Major | documentation, tools/distcp | Siyao Meng | Siyao Meng |
| [HADOOP-16263](https://issues.apache.org/jira/browse/HADOOP-16263) | Update BUILDING.txt with macOS native build instructions | Minor | . | Siyao Meng | Siyao Meng |
| [YARN-9559](https://issues.apache.org/jira/browse/YARN-9559) | Create AbstractContainersLauncher for pluggable ContainersLauncher logic | Major | . | Jonathan Hung | Jonathan Hung |
| [YARN-9796](https://issues.apache.org/jira/browse/YARN-9796) | Fix ASF license issue in branch-3.2 | Blocker | . | Rohith Sharma K S | Prabhu Joseph |

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# Apache Hadoop 3.2.1 Release Notes
These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
---
* [YARN-8986](https://issues.apache.org/jira/browse/YARN-8986) | *Minor* | **publish all exposed ports to random ports when using bridge network**
support -p and -P for bridge type network;
---
* [YARN-9071](https://issues.apache.org/jira/browse/YARN-9071) | *Critical* | **NM and service AM don't have updated status for reinitialized containers**
In progress upgrade status may show READY state sooner than actual upgrade operations. External caller to upgrade API is recommended to wait minimum 30 seconds before querying yarn app -status.
---
* [YARN-9084](https://issues.apache.org/jira/browse/YARN-9084) | *Major* | **Service Upgrade: With default readiness check, the status of upgrade is reported to be successful prematurely**
Improve transient container status accuracy for upgrade.
---
* [HADOOP-15922](https://issues.apache.org/jira/browse/HADOOP-15922) | *Major* | **DelegationTokenAuthenticationFilter get wrong doAsUser since it does not decode URL**
- Fix DelegationTokenAuthentication filter for incorrectly double encode doAs user parameter.
---
* [YARN-8761](https://issues.apache.org/jira/browse/YARN-8761) | *Major* | **Service AM support for decommissioning component instances**
- Component instance number is not linear increment when decommission feature is used. Application with assumption of linear increment component instance number maybe impacted by introduction of this feature.
---
* [HDFS-14305](https://issues.apache.org/jira/browse/HDFS-14305) | *Major* | **Serial number in BlockTokenSecretManager could overlap between different namenodes**
NameNodes rely on independent block token key ranges to communicate block token identities to DataNodes and clients in a way that does not create conflicts between the tokens issued by multiple NameNodes. HDFS-6440 introduced the potential for overlaps in key ranges; this fixes the issue by creating 64 possible key ranges that NameNodes assign themselves to, allowing for up to 64 NameNodes to run safely. This limitation only applies within a single Namespace; there may be more than 64 NameNodes total spread among multiple federated Namespaces.
---
* [HDFS-14396](https://issues.apache.org/jira/browse/HDFS-14396) | *Blocker* | **Failed to load image from FSImageFile when downgrade from 3.x to 2.x**
During a rolling upgrade from Hadoop 2.x to 3.x, NameNode cannot persist erasure coding information, and therefore a user cannot start using erasure coding feature until finalize is done.
---
* [YARN-7055](https://issues.apache.org/jira/browse/YARN-7055) | *Major* | **YARN Timeline Service v.2: beta 1 / GA**
Application Timeline Server v2 is ready for production. It is GA from 3.2.1 release on wards.

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@ -136,7 +136,7 @@
<activeByDefault>false</activeByDefault>
</activation>
<properties>
<jdiff.stable.api>3.2.0</jdiff.stable.api>
<jdiff.stable.api>3.2.1</jdiff.stable.api>
<jdiff.stability>-unstable</jdiff.stability>
<!-- Commented out for HADOOP-11776 -->
<!-- Uncomment param name="${jdiff.compatibility}" in javadoc doclet if compatibility is not empty -->