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Make upstream aware of 3.2.2 release.

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# Apache Hadoop Changelog
## Release 3.2.2 - 2021-01-03
### NEW FEATURES:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-15691](https://issues.apache.org/jira/browse/HADOOP-15691) | Add PathCapabilities to FS and FC to complement StreamCapabilities | Major | . | Steve Loughran | Steve Loughran |
| [YARN-9760](https://issues.apache.org/jira/browse/YARN-9760) | Support configuring application priorities on a workflow level | Major | . | Jonathan Hung | Varun Saxena |
| [HDFS-14905](https://issues.apache.org/jira/browse/HDFS-14905) | Backport HDFS persistent memory read cache support to branch-3.2 | Major | caching, datanode | Feilong He | Feilong He |
| [HDFS-12943](https://issues.apache.org/jira/browse/HDFS-12943) | Consistent Reads from Standby Node | Major | hdfs | Konstantin Shvachko | Konstantin Shvachko |
| [HADOOP-16790](https://issues.apache.org/jira/browse/HADOOP-16790) | Add Write Convenience Methods | Minor | . | David Mollitor | David Mollitor |
| [HADOOP-17210](https://issues.apache.org/jira/browse/HADOOP-17210) | backport HADOOP-15691 PathCapabilities API to branch-3.2 | Major | fs, fs/s3 | Steve Loughran | Steve Loughran |
### IMPROVEMENTS:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [YARN-8750](https://issues.apache.org/jira/browse/YARN-8750) | Refactor TestQueueMetrics | Minor | resourcemanager | Szilard Nemeth | Szilard Nemeth |
| [HADOOP-15849](https://issues.apache.org/jira/browse/HADOOP-15849) | Upgrade netty version to 3.10.6 | Major | . | Xiao Chen | Xiao Chen |
| [HDFS-12946](https://issues.apache.org/jira/browse/HDFS-12946) | Add a tool to check rack configuration against EC policies | Major | erasure-coding | Xiao Chen | Kitti Nanasi |
| [HDFS-14113](https://issues.apache.org/jira/browse/HDFS-14113) | EC : Add Configuration to restrict UserDefined Policies | Major | erasure-coding | Ayush Saxena | Ayush Saxena |
| [HDFS-14006](https://issues.apache.org/jira/browse/HDFS-14006) | Refactor name node to allow different token verification implementations | Major | . | CR Hota | CR Hota |
| [HADOOP-15909](https://issues.apache.org/jira/browse/HADOOP-15909) | KeyProvider class should implement Closeable | Major | kms | Kuhu Shukla | Kuhu Shukla |
| [HDFS-14061](https://issues.apache.org/jira/browse/HDFS-14061) | Check if the cluster topology supports the EC policy before setting, enabling or adding it | Major | erasure-coding, hdfs | Kitti Nanasi | Kitti Nanasi |
| [HDFS-14187](https://issues.apache.org/jira/browse/HDFS-14187) | Make warning message more clear when there are not enough data nodes for EC write | Major | erasure-coding | Kitti Nanasi | Kitti Nanasi |
| [HDFS-14125](https://issues.apache.org/jira/browse/HDFS-14125) | Use parameterized log format in ECTopologyVerifier | Trivial | erasure-coding | Kitti Nanasi | Kitti Nanasi |
| [HDFS-14188](https://issues.apache.org/jira/browse/HDFS-14188) | Make hdfs ec -verifyClusterSetup command accept an erasure coding policy as a parameter | Major | erasure-coding | Kitti Nanasi | Kitti Nanasi |
| [HADOOP-16126](https://issues.apache.org/jira/browse/HADOOP-16126) | ipc.Client.stop() may sleep too long to wait for all connections | Major | ipc | Tsz-wo Sze | Tsz-wo Sze |
| [HADOOP-15014](https://issues.apache.org/jira/browse/HADOOP-15014) | KMS should log the IP address of the clients | Major | kms | Zsombor Gegesy | Zsombor Gegesy |
| [HDFS-14460](https://issues.apache.org/jira/browse/HDFS-14460) | DFSUtil#getNamenodeWebAddr should return HTTPS address based on policy configured | Major | . | CR Hota | CR Hota |
| [HDFS-14624](https://issues.apache.org/jira/browse/HDFS-14624) | When decommissioning a node, log remaining blocks to replicate periodically | Major | namenode | Stephen O'Donnell | Stephen O'Donnell |
| [HDFS-13693](https://issues.apache.org/jira/browse/HDFS-13693) | Remove unnecessary search in INodeDirectory.addChild during image loading | Major | namenode | zhouyingchao | Lisheng Sun |
| [HDFS-14313](https://issues.apache.org/jira/browse/HDFS-14313) | Get hdfs used space from FsDatasetImpl#volumeMap#ReplicaInfo in memory instead of df/du | Major | datanode, performance | Lisheng Sun | Lisheng Sun |
| [HDFS-14678](https://issues.apache.org/jira/browse/HDFS-14678) | Allow triggerBlockReport to a specific namenode | Major | datanode | Leon Gao | Leon Gao |
| [HDFS-14523](https://issues.apache.org/jira/browse/HDFS-14523) | Remove excess read lock for NetworkToplogy | Major | . | Wu Weiwei | Wu Weiwei |
| [HDFS-14497](https://issues.apache.org/jira/browse/HDFS-14497) | Write lock held by metasave impact following RPC processing | Major | namenode | Xiaoqiao He | Xiaoqiao He |
| [HADOOP-16531](https://issues.apache.org/jira/browse/HADOOP-16531) | Log more detail for slow RPC | Major | . | Chen Zhang | Chen Zhang |
| [YARN-9764](https://issues.apache.org/jira/browse/YARN-9764) | Print application submission context label in application summary | Major | . | Jonathan Hung | Manoj Kumar |
| [YARN-9824](https://issues.apache.org/jira/browse/YARN-9824) | Fall back to configured queue ordering policy class name | Major | . | Jonathan Hung | Jonathan Hung |
| [HADOOP-16069](https://issues.apache.org/jira/browse/HADOOP-16069) | Support configure ZK\_DTSM\_ZK\_KERBEROS\_PRINCIPAL in ZKDelegationTokenSecretManager using principal with Schema /\_HOST | Minor | common | luhuachao | luhuachao |
| [YARN-9762](https://issues.apache.org/jira/browse/YARN-9762) | Add submission context label to audit logs | Major | . | Jonathan Hung | Manoj Kumar |
| [HDFS-14850](https://issues.apache.org/jira/browse/HDFS-14850) | Optimize FileSystemAccessService#getFileSystemConfiguration | Major | httpfs, performance | Lisheng Sun | Lisheng Sun |
| [HDFS-14192](https://issues.apache.org/jira/browse/HDFS-14192) | Track missing DFS operations in Statistics and StorageStatistics | Major | . | Ayush Saxena | Ayush Saxena |
| [YARN-9356](https://issues.apache.org/jira/browse/YARN-9356) | Add more tests to ratio method in TestResourceCalculator | Major | . | Szilard Nemeth | Zoltan Siegl |
| [HADOOP-16643](https://issues.apache.org/jira/browse/HADOOP-16643) | Update netty4 to the latest 4.1.42 | Major | . | Wei-Chiu Chuang | Lisheng Sun |
| [HADOOP-16640](https://issues.apache.org/jira/browse/HADOOP-16640) | WASB: Override getCanonicalServiceName() to return full url of WASB filesystem | Major | fs/azure | Da Zhou | Da Zhou |
| [HDFS-14915](https://issues.apache.org/jira/browse/HDFS-14915) | Move Superuser Check Before Taking Lock For Encryption API | Major | . | Ayush Saxena | Ayush Saxena |
| [HDFS-14921](https://issues.apache.org/jira/browse/HDFS-14921) | Remove SuperUser Check in Setting Storage Policy in FileStatus During Listing | Major | . | Ayush Saxena | Ayush Saxena |
| [HDFS-14923](https://issues.apache.org/jira/browse/HDFS-14923) | Remove dead code from HealthMonitor | Minor | . | Hui Fei | Hui Fei |
| [YARN-9914](https://issues.apache.org/jira/browse/YARN-9914) | Use separate configs for free disk space checking for full and not-full disks | Minor | yarn | Jim Brennan | Jim Brennan |
| [MAPREDUCE-7208](https://issues.apache.org/jira/browse/MAPREDUCE-7208) | Tuning TaskRuntimeEstimator | Minor | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-14942](https://issues.apache.org/jira/browse/HDFS-14942) | Change Log Level to debug in JournalNodeSyncer#syncWithJournalAtIndex | Minor | . | Lisheng Sun | Lisheng Sun |
| [HDFS-14979](https://issues.apache.org/jira/browse/HDFS-14979) | [Observer Node] Balancer should submit getBlocks to Observer Node when possible | Major | balancer & mover, hdfs | Erik Krogen | Erik Krogen |
| [HADOOP-16705](https://issues.apache.org/jira/browse/HADOOP-16705) | MBeanInfoBuilder puts unnecessary memory pressure on the system with a debug log | Major | metrics | Lukas Majercak | Lukas Majercak |
| [HADOOP-16712](https://issues.apache.org/jira/browse/HADOOP-16712) | Config ha.failover-controller.active-standby-elector.zk.op.retries is not in core-default.xml | Trivial | . | Wei-Chiu Chuang | Xieming Li |
| [HDFS-14952](https://issues.apache.org/jira/browse/HDFS-14952) | Skip safemode if blockTotal is 0 in new NN | Trivial | namenode | Rajesh Balamohan | Xiaoqiao He |
| [YARN-8842](https://issues.apache.org/jira/browse/YARN-8842) | Expose metrics for custom resource types in QueueMetrics | Major | . | Szilard Nemeth | Szilard Nemeth |
| [YARN-9966](https://issues.apache.org/jira/browse/YARN-9966) | Code duplication in UserGroupMappingPlacementRule | Major | . | Szilard Nemeth | Kevin Su |
| [YARN-9937](https://issues.apache.org/jira/browse/YARN-9937) | Add missing queue configs in RMWebService#CapacitySchedulerQueueInfo | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [HADOOP-16718](https://issues.apache.org/jira/browse/HADOOP-16718) | Allow disabling Server Name Indication (SNI) for Jetty | Major | . | Siyao Meng | Aravindan Vijayan |
| [HADOOP-16729](https://issues.apache.org/jira/browse/HADOOP-16729) | Extract version numbers to head of pom.xml | Minor | build | Tamas Penzes | Tamas Penzes |
| [HADOOP-16735](https://issues.apache.org/jira/browse/HADOOP-16735) | Make it clearer in config default that EnvironmentVariableCredentialsProvider supports AWS\_SESSION\_TOKEN | Minor | documentation, fs/s3 | Mingliang Liu | Mingliang Liu |
| [YARN-10012](https://issues.apache.org/jira/browse/YARN-10012) | Guaranteed and max capacity queue metrics for custom resources | Major | . | Jonathan Hung | Manikandan R |
| [HDFS-15050](https://issues.apache.org/jira/browse/HDFS-15050) | Optimize log information when DFSInputStream meet CannotObtainBlockLengthException | Major | dfsclient | Xiaoqiao He | Xiaoqiao He |
| [YARN-10033](https://issues.apache.org/jira/browse/YARN-10033) | TestProportionalCapacityPreemptionPolicy not initializing vcores for effective max resources | Major | capacity scheduler, test | Eric Payne | Eric Payne |
| [YARN-10039](https://issues.apache.org/jira/browse/YARN-10039) | Allow disabling app submission from REST endpoints | Major | . | Jonathan Hung | Jonathan Hung |
| [YARN-9894](https://issues.apache.org/jira/browse/YARN-9894) | CapacitySchedulerPerf test for measuring hundreds of apps in a large number of queues. | Major | capacity scheduler, test | Eric Payne | Eric Payne |
| [HADOOP-16771](https://issues.apache.org/jira/browse/HADOOP-16771) | Update checkstyle to 8.26 and maven-checkstyle-plugin to 3.1.0 | Major | build | Andras Bokor | Andras Bokor |
| [YARN-10009](https://issues.apache.org/jira/browse/YARN-10009) | In Capacity Scheduler, DRC can treat minimum user limit percent as a max when custom resource is defined | Critical | capacity scheduler | Eric Payne | Eric Payne |
| [HDFS-12999](https://issues.apache.org/jira/browse/HDFS-12999) | When reach the end of the block group, it may not need to flush all the data packets(flushAllInternals) twice. | Major | erasure-coding, hdfs-client | lufei | lufei |
| [HDFS-15074](https://issues.apache.org/jira/browse/HDFS-15074) | DataNode.DataTransfer thread should catch all the expception and log it. | Major | datanode | Surendra Singh Lilhore | Hemanth Boyina |
| [HDFS-14740](https://issues.apache.org/jira/browse/HDFS-14740) | Recover data blocks from persistent memory read cache during datanode restarts | Major | caching, datanode | Feilong He | Feilong He |
| [HADOOP-16775](https://issues.apache.org/jira/browse/HADOOP-16775) | DistCp reuses the same temp file within the task attempt for different files. | Major | tools/distcp | Amir Shenavandeh | Amir Shenavandeh |
| [HDFS-15097](https://issues.apache.org/jira/browse/HDFS-15097) | Purge log in KMS and HttpFS | Minor | httpfs, kms | Doris Gu | Doris Gu |
| [HADOOP-16753](https://issues.apache.org/jira/browse/HADOOP-16753) | Refactor HAAdmin | Major | ha | Akira Ajisaka | Xieming Li |
| [HDFS-14968](https://issues.apache.org/jira/browse/HDFS-14968) | Add ability to know datanode staleness | Minor | datanode, logging, namenode | Ahmed Hussein | Ahmed Hussein |
| [YARN-7913](https://issues.apache.org/jira/browse/YARN-7913) | Improve error handling when application recovery fails with exception | Major | resourcemanager | Gergo Repas | Wilfred Spiegelenburg |
| [HDFS-15117](https://issues.apache.org/jira/browse/HDFS-15117) | EC: Add getECTopologyResultForPolicies to DistributedFileSystem | Major | . | Ayush Saxena | Ayush Saxena |
| [HDFS-15119](https://issues.apache.org/jira/browse/HDFS-15119) | Allow expiration of cached locations in DFSInputStream | Minor | dfsclient | Ahmed Hussein | Ahmed Hussein |
| [MAPREDUCE-7262](https://issues.apache.org/jira/browse/MAPREDUCE-7262) | MRApp helpers block for long intervals (500ms) | Minor | mr-am | Ahmed Hussein | Ahmed Hussein |
| [MAPREDUCE-7260](https://issues.apache.org/jira/browse/MAPREDUCE-7260) | Cross origin request support for Job history server web UI | Critical | jobhistoryserver | Adam Antal | Adam Antal |
| [YARN-10084](https://issues.apache.org/jira/browse/YARN-10084) | Allow inheritance of max app lifetime / default app lifetime | Major | capacity scheduler | Eric Payne | Eric Payne |
| [HDFS-12491](https://issues.apache.org/jira/browse/HDFS-12491) | Support wildcard in CLASSPATH for libhdfs | Major | libhdfs | John Zhuge | Muhammad Samir Khan |
| [YARN-10116](https://issues.apache.org/jira/browse/YARN-10116) | Expose diagnostics in RMAppManager summary | Major | . | Jonathan Hung | Jonathan Hung |
| [HADOOP-16739](https://issues.apache.org/jira/browse/HADOOP-16739) | Fix native build failure of hadoop-pipes on CentOS 8 | Major | tools/pipes | Masatake Iwasaki | Masatake Iwasaki |
| [HADOOP-16847](https://issues.apache.org/jira/browse/HADOOP-16847) | Test TestGroupsCaching fail if HashSet iterates in a different order | Minor | test | testfixer0 | testfixer0 |
| [HDFS-14758](https://issues.apache.org/jira/browse/HDFS-14758) | Decrease lease hard limit | Minor | . | Eric Payne | Hemanth Boyina |
| [HDFS-15086](https://issues.apache.org/jira/browse/HDFS-15086) | Block scheduled counter never get decremet if the block got deleted before replication. | Major | 3.1.1 | Surendra Singh Lilhore | Hemanth Boyina |
| [HDFS-15174](https://issues.apache.org/jira/browse/HDFS-15174) | Optimize ReplicaCachingGetSpaceUsed by reducing unnecessary io operations | Major | . | Lisheng Sun | Lisheng Sun |
| [YARN-9018](https://issues.apache.org/jira/browse/YARN-9018) | Add functionality to AuxiliaryLocalPathHandler to return all locations to read for a given path | Major | . | Kuhu Shukla | Kuhu Shukla |
| [HDFS-14861](https://issues.apache.org/jira/browse/HDFS-14861) | Reset LowRedundancyBlocks Iterator periodically | Major | namenode | Stephen O'Donnell | Stephen O'Donnell |
| [HADOOP-16899](https://issues.apache.org/jira/browse/HADOOP-16899) | Update HdfsDesign.md to reduce ambiguity | Minor | documentation | Akshay Nehe | Akshay Nehe |
| [HADOOP-16772](https://issues.apache.org/jira/browse/HADOOP-16772) | Extract version numbers to head of pom.xml (addendum) | Major | build | Tamas Penzes | Tamas Penzes |
| [HDFS-15197](https://issues.apache.org/jira/browse/HDFS-15197) | [SBN read] Change ObserverRetryOnActiveException log to debug | Minor | hdfs | Chen Liang | Chen Liang |
| [HADOOP-16935](https://issues.apache.org/jira/browse/HADOOP-16935) | Backport HADOOP-10848. Cleanup calling of sun.security.krb5.Config to branch-3.2 | Minor | . | Siyao Meng | Siyao Meng |
| [YARN-10200](https://issues.apache.org/jira/browse/YARN-10200) | Add number of containers to RMAppManager summary | Major | . | Jonathan Hung | Jonathan Hung |
| [HADOOP-16952](https://issues.apache.org/jira/browse/HADOOP-16952) | Add .diff to gitignore | Minor | . | Ayush Saxena | Ayush Saxena |
| [MAPREDUCE-7266](https://issues.apache.org/jira/browse/MAPREDUCE-7266) | historyContext doesn't need to be a class attribute inside JobHistoryServer | Minor | jobhistoryserver | Siddharth Ahuja | Siddharth Ahuja |
| [YARN-10003](https://issues.apache.org/jira/browse/YARN-10003) | YarnConfigurationStore#checkVersion throws exception that belongs to RMStateStore | Major | . | Szilard Nemeth | Benjamin Teke |
| [YARN-10212](https://issues.apache.org/jira/browse/YARN-10212) | Create separate configuration for max global AM attempts | Major | . | Jonathan Hung | Bilwa S T |
| [YARN-5277](https://issues.apache.org/jira/browse/YARN-5277) | When localizers fail due to resource timestamps being out, provide more diagnostics | Major | nodemanager | Steve Loughran | Siddharth Ahuja |
| [YARN-9995](https://issues.apache.org/jira/browse/YARN-9995) | Code cleanup in TestSchedConfCLI | Minor | . | Szilard Nemeth | Bilwa S T |
| [YARN-9354](https://issues.apache.org/jira/browse/YARN-9354) | Resources should be created with ResourceTypesTestHelper instead of TestUtils | Trivial | . | Szilard Nemeth | Andras Gyori |
| [YARN-10002](https://issues.apache.org/jira/browse/YARN-10002) | Code cleanup and improvements in ConfigurationStoreBaseTest | Minor | . | Szilard Nemeth | Benjamin Teke |
| [YARN-9954](https://issues.apache.org/jira/browse/YARN-9954) | Configurable max application tags and max tag length | Major | . | Jonathan Hung | Bilwa S T |
| [YARN-10001](https://issues.apache.org/jira/browse/YARN-10001) | Add explanation of unimplemented methods in InMemoryConfigurationStore | Major | . | Szilard Nemeth | Siddharth Ahuja |
| [HADOOP-17001](https://issues.apache.org/jira/browse/HADOOP-17001) | The suffix name of the unified compression class | Major | io | bianqi | bianqi |
| [YARN-9997](https://issues.apache.org/jira/browse/YARN-9997) | Code cleanup in ZKConfigurationStore | Minor | . | Szilard Nemeth | Andras Gyori |
| [YARN-9996](https://issues.apache.org/jira/browse/YARN-9996) | Code cleanup in QueueAdminConfigurationMutationACLPolicy | Major | . | Szilard Nemeth | Siddharth Ahuja |
| [YARN-9998](https://issues.apache.org/jira/browse/YARN-9998) | Code cleanup in LeveldbConfigurationStore | Minor | . | Szilard Nemeth | Benjamin Teke |
| [YARN-9999](https://issues.apache.org/jira/browse/YARN-9999) | TestFSSchedulerConfigurationStore: Extend from ConfigurationStoreBaseTest, general code cleanup | Minor | . | Szilard Nemeth | Benjamin Teke |
| [HDFS-15295](https://issues.apache.org/jira/browse/HDFS-15295) | AvailableSpaceBlockPlacementPolicy should use chooseRandomWithStorageTypeTwoTrial() for better performance. | Minor | . | Jinglun | Jinglun |
| [YARN-10189](https://issues.apache.org/jira/browse/YARN-10189) | Code cleanup in LeveldbRMStateStore | Minor | . | Benjamin Teke | Benjamin Teke |
| [HADOOP-16886](https://issues.apache.org/jira/browse/HADOOP-16886) | Add hadoop.http.idle\_timeout.ms to core-default.xml | Major | . | Wei-Chiu Chuang | Lisheng Sun |
| [YARN-10260](https://issues.apache.org/jira/browse/YARN-10260) | Allow transitioning queue from DRAINING to RUNNING state | Major | . | Jonathan Hung | Bilwa S T |
| [HADOOP-17042](https://issues.apache.org/jira/browse/HADOOP-17042) | Hadoop distcp throws "ERROR: Tools helper ///usr/lib/hadoop/libexec/tools/hadoop-distcp.sh was not found" | Minor | tools/distcp | Aki Tanaka | Aki Tanaka |
| [HADOOP-14698](https://issues.apache.org/jira/browse/HADOOP-14698) | Make copyFromLocal's -t option available for put as well | Major | . | Andras Bokor | Andras Bokor |
| [YARN-6492](https://issues.apache.org/jira/browse/YARN-6492) | Generate queue metrics for each partition | Major | capacity scheduler | Jonathan Hung | Manikandan R |
| [HADOOP-17047](https://issues.apache.org/jira/browse/HADOOP-17047) | TODO comments exist in trunk while the related issues are already fixed. | Trivial | . | Rungroj Maipradit | Rungroj Maipradit |
| [HDFS-15406](https://issues.apache.org/jira/browse/HDFS-15406) | Improve the speed of Datanode Block Scan | Major | . | Hemanth Boyina | Hemanth Boyina |
| [HADOOP-17090](https://issues.apache.org/jira/browse/HADOOP-17090) | Increase precommit job timeout from 5 hours to 20 hours | Major | build | Akira Ajisaka | Akira Ajisaka |
| [YARN-10297](https://issues.apache.org/jira/browse/YARN-10297) | TestContinuousScheduling#testFairSchedulerContinuousSchedulingInitTime fails intermittently | Major | . | Jonathan Hung | Jim Brennan |
| [HADOOP-17127](https://issues.apache.org/jira/browse/HADOOP-17127) | Use RpcMetrics.TIMEUNIT to initialize rpc queueTime and processingTime | Minor | common | Jim Brennan | Jim Brennan |
| [HDFS-15404](https://issues.apache.org/jira/browse/HDFS-15404) | ShellCommandFencer should expose info about source | Major | . | Chen Liang | Chen Liang |
| [HADOOP-17147](https://issues.apache.org/jira/browse/HADOOP-17147) | Dead link in hadoop-kms/index.md.vm | Minor | documentation, kms | Akira Ajisaka | Xieming Li |
| [YARN-10343](https://issues.apache.org/jira/browse/YARN-10343) | Legacy RM UI should include labeled metrics for allocated, total, and reserved resources. | Major | . | Eric Payne | Eric Payne |
| [YARN-1529](https://issues.apache.org/jira/browse/YARN-1529) | Add Localization overhead metrics to NM | Major | nodemanager | Gera Shegalov | Jim Brennan |
| [YARN-10251](https://issues.apache.org/jira/browse/YARN-10251) | Show extended resources on legacy RM UI. | Major | . | Eric Payne | Eric Payne |
| [HADOOP-17159](https://issues.apache.org/jira/browse/HADOOP-17159) | Make UGI support forceful relogin from keytab ignoring the last login time | Major | security | Sandeep Guggilam | Sandeep Guggilam |
| [YARN-10353](https://issues.apache.org/jira/browse/YARN-10353) | Log vcores used and cumulative cpu in containers monitor | Minor | yarn | Jim Brennan | Jim Brennan |
| [YARN-10369](https://issues.apache.org/jira/browse/YARN-10369) | Make NMTokenSecretManagerInRM sending NMToken for nodeId DEBUG | Minor | yarn | Jim Brennan | Jim Brennan |
| [YARN-10390](https://issues.apache.org/jira/browse/YARN-10390) | LeafQueue: retain user limits cache across assignContainers() calls | Major | capacity scheduler, capacityscheduler | Muhammad Samir Khan | Muhammad Samir Khan |
| [HDFS-15574](https://issues.apache.org/jira/browse/HDFS-15574) | Remove unnecessary sort of block list in DirectoryScanner | Major | . | Stephen O'Donnell | Stephen O'Donnell |
| [HDFS-15583](https://issues.apache.org/jira/browse/HDFS-15583) | Backport DirectoryScanner improvements HDFS-14476, HDFS-14751 and HDFS-15048 to branch 3.2 and 3.1 | Major | datanode | Stephen O'Donnell | Stephen O'Donnell |
| [HDFS-15581](https://issues.apache.org/jira/browse/HDFS-15581) | Access Controlled HTTPFS Proxy | Minor | httpfs | Richard | Richard |
| [HDFS-15415](https://issues.apache.org/jira/browse/HDFS-15415) | Reduce locking in Datanode DirectoryScanner | Major | datanode | Stephen O'Donnell | Stephen O'Donnell |
| [HADOOP-17287](https://issues.apache.org/jira/browse/HADOOP-17287) | Support new Instance by non default constructor by ReflectionUtils | Major | . | Baolong Mao | Baolong Mao |
| [YARN-10451](https://issues.apache.org/jira/browse/YARN-10451) | RM (v1) UI NodesPage can NPE when yarn.io/gpu resource type is defined. | Major | . | Eric Payne | Eric Payne |
| [YARN-9667](https://issues.apache.org/jira/browse/YARN-9667) | Container-executor.c duplicates messages to stdout | Major | nodemanager, yarn | Adam Antal | Peter Bacsko |
| [MAPREDUCE-7301](https://issues.apache.org/jira/browse/MAPREDUCE-7301) | Expose Mini MR Cluster attribute for testing | Minor | test | Swaroopa Kadam | Swaroopa Kadam |
| [HDFS-15567](https://issues.apache.org/jira/browse/HDFS-15567) | [SBN Read] HDFS should expose msync() API to allow downstream applications call it explicitly. | Major | ha, hdfs-client | Konstantin Shvachko | Konstantin Shvachko |
| [YARN-10450](https://issues.apache.org/jira/browse/YARN-10450) | Add cpu and memory utilization per node and cluster-wide metrics | Minor | yarn | Jim Brennan | Jim Brennan |
| [YARN-10475](https://issues.apache.org/jira/browse/YARN-10475) | Scale RM-NM heartbeat interval based on node utilization | Minor | yarn | Jim Brennan | Jim Brennan |
| [HDFS-15665](https://issues.apache.org/jira/browse/HDFS-15665) | Balancer logging improvement | Major | balancer & mover | Konstantin Shvachko | Konstantin Shvachko |
| [HADOOP-17342](https://issues.apache.org/jira/browse/HADOOP-17342) | Creating a token identifier should not do kerberos name resolution | Major | common | Jim Brennan | Jim Brennan |
| [YARN-10479](https://issues.apache.org/jira/browse/YARN-10479) | RMProxy should retry on SocketTimeout Exceptions | Major | yarn | Jim Brennan | Jim Brennan |
| [HDFS-15623](https://issues.apache.org/jira/browse/HDFS-15623) | Respect configured values of rpc.engine | Major | hdfs | Hector Sandoval Chaverri | Hector Sandoval Chaverri |
| [HDFS-14395](https://issues.apache.org/jira/browse/HDFS-14395) | Remove WARN Logging From Interrupts in DataStreamer | Minor | hdfs-client | David Mollitor | David Mollitor |
| [HADOOP-17367](https://issues.apache.org/jira/browse/HADOOP-17367) | Add InetAddress api to ProxyUsers.authorize | Major | performance, security | Ahmed Hussein | Ahmed Hussein |
| [MAPREDUCE-7304](https://issues.apache.org/jira/browse/MAPREDUCE-7304) | Enhance the map-reduce Job end notifier to be able to notify the given URL via a custom class | Major | mrv2 | Daniel Fritsi | Zoltán Erdmann |
| [MAPREDUCE-7309](https://issues.apache.org/jira/browse/MAPREDUCE-7309) | Improve performance of reading resource request for mapper/reducers from config | Major | applicationmaster | Wangda Tan | Peter Bacsko |
| [HADOOP-17389](https://issues.apache.org/jira/browse/HADOOP-17389) | KMS should log full UGI principal | Major | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15717](https://issues.apache.org/jira/browse/HDFS-15717) | Improve fsck logging | Major | logging, namenode | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15751](https://issues.apache.org/jira/browse/HDFS-15751) | Add documentation for msync() API to filesystem.md | Major | documentation | Konstantin Shvachko | Konstantin Shvachko |
### BUG FIXES:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-15418](https://issues.apache.org/jira/browse/HADOOP-15418) | Hadoop KMSAuthenticationFilter needs to use getPropsByPrefix instead of iterator to avoid ConcurrentModificationException | Major | common | Suma Shivaprasad | Suma Shivaprasad |
| [HDFS-14004](https://issues.apache.org/jira/browse/HDFS-14004) | TestLeaseRecovery2#testCloseWhileRecoverLease fails intermittently in trunk | Major | . | Ayush Saxena | Ayush Saxena |
| [HDFS-13959](https://issues.apache.org/jira/browse/HDFS-13959) | TestUpgradeDomainBlockPlacementPolicy is flaky | Major | . | Ayush Saxena | Ayush Saxena |
| [YARN-8948](https://issues.apache.org/jira/browse/YARN-8948) | PlacementRule interface should be for all YarnSchedulers | Major | . | Bibin Chundatt | Bibin Chundatt |
| [HADOOP-16013](https://issues.apache.org/jira/browse/HADOOP-16013) | DecayRpcScheduler decay thread should run as a daemon | Major | ipc | Erik Krogen | Erik Krogen |
| [HDFS-14175](https://issues.apache.org/jira/browse/HDFS-14175) | EC: Native XOR decoder should reset the output buffer before using it. | Major | ec, hdfs | Surendra Singh Lilhore | Ayush Saxena |
| [HDFS-14202](https://issues.apache.org/jira/browse/HDFS-14202) | "dfs.disk.balancer.max.disk.throughputInMBperSec" property is not working as per set value. | Major | diskbalancer | Ranith Sardar | Ranith Sardar |
| [HADOOP-16127](https://issues.apache.org/jira/browse/HADOOP-16127) | In ipc.Client, put a new connection could happen after stop | Major | ipc | Tsz-wo Sze | Tsz-wo Sze |
| [YARN-4901](https://issues.apache.org/jira/browse/YARN-4901) | QueueMetrics needs to be cleared before MockRM is initialized | Major | scheduler | Daniel Templeton | Peter Bacsko |
| [HADOOP-16161](https://issues.apache.org/jira/browse/HADOOP-16161) | NetworkTopology#getWeightUsingNetworkLocation return unexpected result | Major | net | Xiaoqiao He | Xiaoqiao He |
| [HDFS-14434](https://issues.apache.org/jira/browse/HDFS-14434) | webhdfs that connect secure hdfs should not use user.name parameter | Minor | webhdfs | KWON BYUNGCHANG | KWON BYUNGCHANG |
| [HDFS-14527](https://issues.apache.org/jira/browse/HDFS-14527) | Stop all DataNodes may result in NN terminate | Major | namenode | Xiaoqiao He | Xiaoqiao He |
| [HDFS-14494](https://issues.apache.org/jira/browse/HDFS-14494) | Move Server logging of StatedId inside receiveRequestState() | Major | . | Konstantin Shvachko | Shweta |
| [HDFS-14599](https://issues.apache.org/jira/browse/HDFS-14599) | HDFS-12487 breaks test TestDiskBalancer.testDiskBalancerWithFedClusterWithOneNameServiceEmpty | Major | diskbalancer | Wei-Chiu Chuang | Xiaoqiao He |
| [HDFS-14618](https://issues.apache.org/jira/browse/HDFS-14618) | Incorrect synchronization of ArrayList field (ArrayList is thread-unsafe). | Critical | . | Paul Ward | Paul Ward |
| [HDFS-14610](https://issues.apache.org/jira/browse/HDFS-14610) | HashMap is not thread safe. Field storageMap is typically synchronized by storageMap. However, in one place, field storageMap is not protected with synchronized. | Critical | . | Paul Ward | Paul Ward |
| [HDFS-14499](https://issues.apache.org/jira/browse/HDFS-14499) | Misleading REM\_QUOTA value with snapshot and trash feature enabled for a directory | Major | snapshots | Shashikant Banerjee | Shashikant Banerjee |
| [HADOOP-16451](https://issues.apache.org/jira/browse/HADOOP-16451) | Update jackson-databind to 2.9.9.1 | Major | . | Wei-Chiu Chuang | Siyao Meng |
| [HDFS-14647](https://issues.apache.org/jira/browse/HDFS-14647) | NPE during secure namenode startup | Major | hdfs | Fengnan Li | Fengnan Li |
| [HADOOP-16461](https://issues.apache.org/jira/browse/HADOOP-16461) | Regression: FileSystem cache lock parses XML within the lock | Major | fs | Gopal Vijayaraghavan | Gopal Vijayaraghavan |
| [HDFS-14660](https://issues.apache.org/jira/browse/HDFS-14660) | [SBN Read] ObserverNameNode should throw StandbyException for requests not from ObserverProxyProvider | Major | . | Chao Sun | Chao Sun |
| [HADOOP-16460](https://issues.apache.org/jira/browse/HADOOP-16460) | ABFS: fix for Sever Name Indication (SNI) | Major | fs/azure | Thomas Marqardt | Sneha Vijayarajan |
| [HDFS-14569](https://issues.apache.org/jira/browse/HDFS-14569) | Result of crypto -listZones is not formatted properly | Major | . | Hemanth Boyina | Hemanth Boyina |
| [HADOOP-12282](https://issues.apache.org/jira/browse/HADOOP-12282) | Connection thread's name should be updated after address changing is detected | Major | ipc | zhouyingchao | Lisheng Sun |
| [HDFS-14686](https://issues.apache.org/jira/browse/HDFS-14686) | HttpFS: HttpFSFileSystem#getErasureCodingPolicy always returns null | Major | httpfs | Siyao Meng | Siyao Meng |
| [HADOOP-15865](https://issues.apache.org/jira/browse/HADOOP-15865) | ConcurrentModificationException in Configuration.overlay() method | Major | . | Oleksandr Shevchenko | Oleksandr Shevchenko |
| [HADOOP-16487](https://issues.apache.org/jira/browse/HADOOP-16487) | Update jackson-databind to 2.9.9.2 | Critical | . | Siyao Meng | Siyao Meng |
| [HDFS-14759](https://issues.apache.org/jira/browse/HDFS-14759) | HDFS cat logs an info message | Major | . | Eric Badger | Eric Badger |
| [HADOOP-16533](https://issues.apache.org/jira/browse/HADOOP-16533) | Update jackson-databind to 2.9.9.3 | Major | . | Akira Ajisaka | Akira Ajisaka |
| [HDFS-14699](https://issues.apache.org/jira/browse/HDFS-14699) | Erasure Coding: Storage not considered in live replica when replication streams hard limit reached to threshold | Critical | ec | Zhao Yi Ming | Zhao Yi Ming |
| [YARN-9833](https://issues.apache.org/jira/browse/YARN-9833) | Race condition when DirectoryCollection.checkDirs() runs during container launch | Major | . | Peter Bacsko | Peter Bacsko |
| [YARN-9837](https://issues.apache.org/jira/browse/YARN-9837) | YARN Service fails to fetch status for Stopped apps with bigger spec files | Major | yarn-native-services | Tarun Parimi | Tarun Parimi |
| [YARN-2255](https://issues.apache.org/jira/browse/YARN-2255) | YARN Audit logging not added to log4j.properties | Major | . | Varun Saxena | Aihua Xu |
| [HDFS-14836](https://issues.apache.org/jira/browse/HDFS-14836) | FileIoProvider should not increase FileIoErrors metric in datanode volume metric | Minor | . | Aiphago | Aiphago |
| [HADOOP-16582](https://issues.apache.org/jira/browse/HADOOP-16582) | LocalFileSystem's mkdirs() does not work as expected under viewfs. | Major | . | Kihwal Lee | Kihwal Lee |
| [HADOOP-16581](https://issues.apache.org/jira/browse/HADOOP-16581) | ValueQueue does not trigger an async refill when number of values falls below watermark | Major | common, kms | Yuval Degani | Yuval Degani |
| [HDFS-14853](https://issues.apache.org/jira/browse/HDFS-14853) | NPE in DFSNetworkTopology#chooseRandomWithStorageType() when the excludedNode is not present | Major | . | Ranith Sardar | Ranith Sardar |
| [HDFS-13660](https://issues.apache.org/jira/browse/HDFS-13660) | DistCp job fails when new data is appended in the file while the distCp copy job is running | Critical | distcp | Mukund Thakur | Mukund Thakur |
| [HDFS-14808](https://issues.apache.org/jira/browse/HDFS-14808) | EC: Improper size values for corrupt ec block in LOG | Major | ec | Harshakiran Reddy | Ayush Saxena |
| [HDFS-14849](https://issues.apache.org/jira/browse/HDFS-14849) | Erasure Coding: the internal block is replicated many times when datanode is decommissioning | Major | ec, erasure-coding | HuangTao | HuangTao |
| [YARN-9858](https://issues.apache.org/jira/browse/YARN-9858) | Optimize RMContext getExclusiveEnforcedPartitions | Major | . | Jonathan Hung | Jonathan Hung |
| [HDFS-14492](https://issues.apache.org/jira/browse/HDFS-14492) | Snapshot memory leak | Major | snapshots | Wei-Chiu Chuang | Wei-Chiu Chuang |
| [HDFS-14418](https://issues.apache.org/jira/browse/HDFS-14418) | Remove redundant super user priveledge checks from namenode. | Major | . | Ayush Saxena | Ayush Saxena |
| [HADOOP-16619](https://issues.apache.org/jira/browse/HADOOP-16619) | Upgrade jackson and jackson-databind to 2.9.10 | Major | . | Siyao Meng | Siyao Meng |
| [HDFS-14637](https://issues.apache.org/jira/browse/HDFS-14637) | Namenode may not replicate blocks to meet the policy after enabling upgradeDomain | Major | namenode | Stephen O'Donnell | Stephen O'Donnell |
| [HDFS-14879](https://issues.apache.org/jira/browse/HDFS-14879) | Header was wrong in Snapshot web UI | Major | . | Hemanth Boyina | Hemanth Boyina |
| [HDFS-14655](https://issues.apache.org/jira/browse/HDFS-14655) | [SBN Read] Namenode crashes if one of The JN is down | Critical | . | Harshakiran Reddy | Ayush Saxena |
| [HDFS-14859](https://issues.apache.org/jira/browse/HDFS-14859) | Prevent unnecessary evaluation of costly operation getNumLiveDataNodes when dfs.namenode.safemode.min.datanodes is not zero | Major | hdfs | Srinivasu Majeti | Srinivasu Majeti |
| [YARN-6715](https://issues.apache.org/jira/browse/YARN-6715) | Fix documentation about NodeHealthScriptRunner | Major | documentation, nodemanager | Peter Bacsko | Peter Bacsko |
| [YARN-9552](https://issues.apache.org/jira/browse/YARN-9552) | FairScheduler: NODE\_UPDATE can cause NoSuchElementException | Major | fairscheduler | Peter Bacsko | Peter Bacsko |
| [HDFS-14754](https://issues.apache.org/jira/browse/HDFS-14754) | Erasure Coding : The number of Under-Replicated Blocks never reduced | Critical | ec | Hemanth Boyina | Hemanth Boyina |
| [HDFS-14245](https://issues.apache.org/jira/browse/HDFS-14245) | Class cast error in GetGroups with ObserverReadProxyProvider | Major | . | Shen Yinjie | Erik Krogen |
| [HDFS-14373](https://issues.apache.org/jira/browse/HDFS-14373) | EC : Decoding is failing when block group last incomplete cell fall in to AlignedStripe | Critical | ec, hdfs-client | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [HDFS-14509](https://issues.apache.org/jira/browse/HDFS-14509) | DN throws InvalidToken due to inequality of password when upgrade NN 2.x to 3.x | Blocker | . | Yuxuan Wang | Yuxuan Wang |
| [HDFS-14886](https://issues.apache.org/jira/browse/HDFS-14886) | In NameNode Web UI's Startup Progress page, Loading edits always shows 0 sec | Major | . | Hemanth Boyina | Hemanth Boyina |
| [YARN-8453](https://issues.apache.org/jira/browse/YARN-8453) | Additional Unit tests to verify queue limit and max-limit with multiple resource types | Major | capacity scheduler | Sunil G | Adam Antal |
| [HDFS-14890](https://issues.apache.org/jira/browse/HDFS-14890) | Setting permissions on name directory fails on non posix compliant filesystems | Blocker | . | hirik | Siddharth Wagle |
| [HADOOP-16580](https://issues.apache.org/jira/browse/HADOOP-16580) | Disable retry of FailoverOnNetworkExceptionRetry in case of AccessControlException | Major | common | Adam Antal | Adam Antal |
| [HDFS-14909](https://issues.apache.org/jira/browse/HDFS-14909) | DFSNetworkTopology#chooseRandomWithStorageType() should not decrease storage count for excluded node which is already part of excluded scope | Major | namenode | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [HADOOP-16662](https://issues.apache.org/jira/browse/HADOOP-16662) | Remove unnecessary InnerNode check in NetworkTopology#add() | Minor | . | Lisheng Sun | Lisheng Sun |
| [HDFS-14847](https://issues.apache.org/jira/browse/HDFS-14847) | Erasure Coding: Blocks are over-replicated while EC decommissioning | Critical | ec | Hui Fei | Hui Fei |
| [HDFS-14913](https://issues.apache.org/jira/browse/HDFS-14913) | Correct the value of available count in DFSNetworkTopology#chooseRandomWithStorageType() | Major | . | Ayush Saxena | Ayush Saxena |
| [YARN-9915](https://issues.apache.org/jira/browse/YARN-9915) | Fix FindBug issue in QueueMetrics | Minor | . | Prabhu Joseph | Prabhu Joseph |
| [HDFS-12749](https://issues.apache.org/jira/browse/HDFS-12749) | DN may not send block report to NN after NN restart | Major | datanode | TanYuxin | Xiaoqiao He |
| [HDFS-13901](https://issues.apache.org/jira/browse/HDFS-13901) | INode access time is ignored because of race between open and rename | Major | . | Jinglun | Jinglun |
| [HDFS-14910](https://issues.apache.org/jira/browse/HDFS-14910) | Rename Snapshot with Pre Descendants Fail With IllegalArgumentException. | Blocker | . | Íñigo Goiri | Wei-Chiu Chuang |
| [HDFS-14308](https://issues.apache.org/jira/browse/HDFS-14308) | DFSStripedInputStream curStripeBuf is not freed by unbuffer() | Major | ec | Joe McDonnell | Zhao Yi Ming |
| [HDFS-14931](https://issues.apache.org/jira/browse/HDFS-14931) | hdfs crypto commands limit column width | Major | . | Eric Badger | Eric Badger |
| [HADOOP-16669](https://issues.apache.org/jira/browse/HADOOP-16669) | TestRawLocalFileSystemContract.testPermission fails if no native library | Minor | common, test | Steve Loughran | Steve Loughran |
| [HDFS-14920](https://issues.apache.org/jira/browse/HDFS-14920) | Erasure Coding: Decommission may hang If one or more datanodes are out of service during decommission | Major | ec | Hui Fei | Hui Fei |
| [HDFS-13736](https://issues.apache.org/jira/browse/HDFS-13736) | BlockPlacementPolicyDefault can not choose favored nodes when 'dfs.namenode.block-placement-policy.default.prefer-local-node' set to false | Major | . | hu xiaodong | hu xiaodong |
| [HDFS-14925](https://issues.apache.org/jira/browse/HDFS-14925) | rename operation should check nest snapshot | Major | namenode | Junwang Zhao | Junwang Zhao |
| [YARN-9949](https://issues.apache.org/jira/browse/YARN-9949) | Add missing queue configs for root queue in RMWebService#CapacitySchedulerInfo | Minor | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [HDFS-14945](https://issues.apache.org/jira/browse/HDFS-14945) | Revise PacketResponder's log. | Minor | datanode | Xudong Cao | Xudong Cao |
| [HDFS-14946](https://issues.apache.org/jira/browse/HDFS-14946) | Erasure Coding: Block recovery failed during decommissioning | Major | . | Hui Fei | Hui Fei |
| [HDFS-14384](https://issues.apache.org/jira/browse/HDFS-14384) | When lastLocatedBlock token expire, it will take 1~3s second to refetch it. | Major | hdfs-client | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [HDFS-14806](https://issues.apache.org/jira/browse/HDFS-14806) | Bootstrap standby may fail if used in-progress tailing | Major | namenode | Chen Liang | Chen Liang |
| [HDFS-14941](https://issues.apache.org/jira/browse/HDFS-14941) | Potential editlog race condition can cause corrupted file | Major | namenode | Chen Liang | Chen Liang |
| [HDFS-14958](https://issues.apache.org/jira/browse/HDFS-14958) | TestBalancerWithNodeGroup is not using NetworkTopologyWithNodeGroup | Minor | hdfs | Jim Brennan | Jim Brennan |
| [HDFS-14720](https://issues.apache.org/jira/browse/HDFS-14720) | DataNode shouldn't report block as bad block if the block length is Long.MAX\_VALUE. | Major | datanode | Surendra Singh Lilhore | Hemanth Boyina |
| [HADOOP-16676](https://issues.apache.org/jira/browse/HADOOP-16676) | Backport HADOOP-16152 to branch-3.2 | Major | common | DW | Siyao Meng |
| [HADOOP-16677](https://issues.apache.org/jira/browse/HADOOP-16677) | Recalculate the remaining timeout millis correctly while throwing an InterupptedException in SocketIOWithTimeout. | Minor | common | Xudong Cao | Xudong Cao |
| [HDFS-14884](https://issues.apache.org/jira/browse/HDFS-14884) | Add sanity check that zone key equals feinfo key while setting Xattrs | Major | encryption, hdfs | Mukul Kumar Singh | Mukul Kumar Singh |
| [HADOOP-15097](https://issues.apache.org/jira/browse/HADOOP-15097) | AbstractContractDeleteTest::testDeleteNonEmptyDirRecursive with misleading path | Minor | fs, test | zhoutai.zt | Xieming Li |
| [HADOOP-16710](https://issues.apache.org/jira/browse/HADOOP-16710) | testing\_azure.md documentation is misleading | Major | fs/azure, test | Andras Bokor | Andras Bokor |
| [YARN-9984](https://issues.apache.org/jira/browse/YARN-9984) | FSPreemptionThread can cause NullPointerException while app is unregistered with containers running on a node | Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [YARN-9983](https://issues.apache.org/jira/browse/YARN-9983) | Typo in YARN Service overview documentation | Trivial | documentation | Denes Gerencser | Denes Gerencser |
| [HADOOP-16719](https://issues.apache.org/jira/browse/HADOOP-16719) | Remove the disallowed element config within maven-checkstyle-plugin | Major | . | Wanqiang Ji | Wanqiang Ji |
| [HADOOP-16700](https://issues.apache.org/jira/browse/HADOOP-16700) | RpcQueueTime may be negative when the response has to be sent later | Minor | . | xuzq | xuzq |
| [HADOOP-15686](https://issues.apache.org/jira/browse/HADOOP-15686) | Supress bogus AbstractWadlGeneratorGrammarGenerator in KMS stderr | Major | kms | Wei-Chiu Chuang | Wei-Chiu Chuang |
| [HDFS-14940](https://issues.apache.org/jira/browse/HDFS-14940) | HDFS Balancer : Do not allow to set balancer maximum network bandwidth more than 1TB | Minor | balancer & mover | Souryakanta Dwivedy | Hemanth Boyina |
| [YARN-9838](https://issues.apache.org/jira/browse/YARN-9838) | Fix resource inconsistency for queues when moving app with reserved container to another queue | Critical | capacity scheduler | jiulongzhu | jiulongzhu |
| [YARN-9968](https://issues.apache.org/jira/browse/YARN-9968) | Public Localizer is exiting in NodeManager due to NullPointerException | Major | nodemanager | Tarun Parimi | Tarun Parimi |
| [YARN-9011](https://issues.apache.org/jira/browse/YARN-9011) | Race condition during decommissioning | Major | nodemanager | Peter Bacsko | Peter Bacsko |
| [HDFS-14973](https://issues.apache.org/jira/browse/HDFS-14973) | Balancer getBlocks RPC dispersal does not function properly | Major | balancer & mover | Erik Krogen | Erik Krogen |
| [HADOOP-16685](https://issues.apache.org/jira/browse/HADOOP-16685) | FileSystem#listStatusIterator does not check if given path exists | Major | fs | Sahil Takiar | Sahil Takiar |
| [MAPREDUCE-7240](https://issues.apache.org/jira/browse/MAPREDUCE-7240) | Exception ' Invalid event: TA\_TOO\_MANY\_FETCH\_FAILURE at SUCCESS\_FINISHING\_CONTAINER' cause job error | Critical | . | luhuachao | luhuachao |
| [MAPREDUCE-7249](https://issues.apache.org/jira/browse/MAPREDUCE-7249) | Invalid event TA\_TOO\_MANY\_FETCH\_FAILURE at SUCCESS\_CONTAINER\_CLEANUP causes job failure | Critical | applicationmaster, mrv2 | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [YARN-9993](https://issues.apache.org/jira/browse/YARN-9993) | Remove incorrectly committed files from YARN-9011 | Major | yarn | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [HDFS-15010](https://issues.apache.org/jira/browse/HDFS-15010) | BlockPoolSlice#addReplicaThreadPool static pool should be initialized by static method | Major | datanode | Surendra Singh Lilhore | Surendra Singh Lilhore |
| [HADOOP-16744](https://issues.apache.org/jira/browse/HADOOP-16744) | Fix building instruction to enable zstd | Minor | documentation | Masatake Iwasaki | Masatake Iwasaki |
| [YARN-9985](https://issues.apache.org/jira/browse/YARN-9985) | Unsupported "transitionToObserver" option displaying for rmadmin command | Minor | RM, yarn | Souryakanta Dwivedy | Ayush Saxena |
| [HADOOP-16754](https://issues.apache.org/jira/browse/HADOOP-16754) | Fix docker failed to build yetus/hadoop | Blocker | build | Kevin Su | Kevin Su |
| [HDFS-15032](https://issues.apache.org/jira/browse/HDFS-15032) | Balancer crashes when it fails to contact an unavailable NN via ObserverReadProxyProvider | Major | balancer & mover | Erik Krogen | Erik Krogen |
| [HDFS-15036](https://issues.apache.org/jira/browse/HDFS-15036) | Active NameNode should not silently fail the image transfer | Major | namenode | Konstantin Shvachko | Chen Liang |
| [HDFS-14519](https://issues.apache.org/jira/browse/HDFS-14519) | NameQuota is not update after concat operation, so namequota is wrong | Major | . | Ranith Sardar | Ranith Sardar |
| [YARN-10055](https://issues.apache.org/jira/browse/YARN-10055) | bower install fails | Blocker | build, yarn-ui-v2 | Akira Ajisaka | Akira Ajisaka |
| [HDFS-15076](https://issues.apache.org/jira/browse/HDFS-15076) | Fix tests that hold FSDirectory lock, without holding FSNamesystem lock. | Major | test | Konstantin Shvachko | Konstantin Shvachko |
| [HDFS-15073](https://issues.apache.org/jira/browse/HDFS-15073) | Replace curator-shaded guava import with the standard one | Minor | hdfs-client | Akira Ajisaka | Chandra Sanivarapu |
| [HADOOP-16042](https://issues.apache.org/jira/browse/HADOOP-16042) | Update the link to HadoopJavaVersion | Minor | documentation | Akira Ajisaka | Chandra Sanivarapu |
| [HDFS-14934](https://issues.apache.org/jira/browse/HDFS-14934) | [SBN Read] Standby NN throws many InterruptedExceptions when dfs.ha.tail-edits.period is 0 | Major | . | Takanobu Asanuma | Ayush Saxena |
| [YARN-10053](https://issues.apache.org/jira/browse/YARN-10053) | Placement rules do not use correct group service init | Major | yarn | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| [HDFS-15068](https://issues.apache.org/jira/browse/HDFS-15068) | DataNode could meet deadlock if invoke refreshVolumes when register | Major | datanode | Xiaoqiao He | Aiphago |
| [MAPREDUCE-7255](https://issues.apache.org/jira/browse/MAPREDUCE-7255) | Fix typo in MapReduce documentaion example | Trivial | documentation | Sergey Pogorelov | Sergey Pogorelov |
| [HDFS-15072](https://issues.apache.org/jira/browse/HDFS-15072) | HDFS MiniCluster fails to start when run in directory path with a % | Minor | . | Geoffrey Jacoby | Masatake Iwasaki |
| [HDFS-15077](https://issues.apache.org/jira/browse/HDFS-15077) | Fix intermittent failure of TestDFSClientRetries#testLeaseRenewSocketTimeout | Minor | test | Masatake Iwasaki | Masatake Iwasaki |
| [HDFS-15080](https://issues.apache.org/jira/browse/HDFS-15080) | Fix the issue in reading persistent memory cached data with an offset | Major | caching, datanode | Feilong He | Feilong He |
| [YARN-7387](https://issues.apache.org/jira/browse/YARN-7387) | org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestIncreaseAllocationExpirer fails intermittently | Major | . | Miklos Szegedi | Jim Brennan |
| [YARN-8672](https://issues.apache.org/jira/browse/YARN-8672) | TestContainerManager#testLocalingResourceWhileContainerRunning occasionally times out | Major | nodemanager | Jason Darrell Lowe | Chandni Singh |
| [HDFS-14957](https://issues.apache.org/jira/browse/HDFS-14957) | INodeReference Space Consumed was not same in QuotaUsage and ContentSummary | Major | namenode | Hemanth Boyina | Hemanth Boyina |
| [MAPREDUCE-7252](https://issues.apache.org/jira/browse/MAPREDUCE-7252) | Handling 0 progress in SimpleExponential task runtime estimator | Minor | . | Ahmed Hussein | Ahmed Hussein |
| [HADOOP-16749](https://issues.apache.org/jira/browse/HADOOP-16749) | Configuration parsing of CDATA values are blank | Major | conf | Jonathan Turner Eagles | Daryn Sharp |
| [HDFS-15095](https://issues.apache.org/jira/browse/HDFS-15095) | Fix accidental comment in flaky test TestDecommissioningStatus | Major | hdfs | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15099](https://issues.apache.org/jira/browse/HDFS-15099) | [SBN Read] checkOperation(WRITE) should throw ObserverRetryOnActiveException on ObserverNode | Major | namenode | Konstantin Shvachko | Chen Liang |
| [HDFS-14578](https://issues.apache.org/jira/browse/HDFS-14578) | AvailableSpaceBlockPlacementPolicy always prefers local node | Major | block placement | Wei-Chiu Chuang | Ayush Saxena |
| [HADOOP-16683](https://issues.apache.org/jira/browse/HADOOP-16683) | Disable retry of FailoverOnNetworkExceptionRetry in case of wrapped AccessControlException | Major | common | Adam Antal | Adam Antal |
| [MAPREDUCE-7256](https://issues.apache.org/jira/browse/MAPREDUCE-7256) | Fix javadoc error in SimpleExponentialSmoothing | Minor | documentation | Masatake Iwasaki | Masatake Iwasaki |
| [YARN-8373](https://issues.apache.org/jira/browse/YARN-8373) | RM Received RMFatalEvent of type CRITICAL\_THREAD\_CRASH | Major | fairscheduler, resourcemanager | Girish Bhat | Wilfred Spiegelenburg |
| [MAPREDUCE-7247](https://issues.apache.org/jira/browse/MAPREDUCE-7247) | Modify HistoryServerRest.html content,change The job attempt id‘s datatype from string to int | Major | documentation | zhaoshengjie | zhaoshengjie |
| [YARN-9970](https://issues.apache.org/jira/browse/YARN-9970) | Refactor TestUserGroupMappingPlacementRule#verifyQueueMapping | Major | . | Manikandan R | Manikandan R |
| [YARN-8148](https://issues.apache.org/jira/browse/YARN-8148) | Update decimal values for queue capacities shown on queue status CLI | Major | client | Prabhu Joseph | Prabhu Joseph |
| [HADOOP-16808](https://issues.apache.org/jira/browse/HADOOP-16808) | Use forkCount and reuseForks parameters instead of forkMode in the config of maven surefire plugin | Minor | build | Akira Ajisaka | Xieming Li |
| [HADOOP-16793](https://issues.apache.org/jira/browse/HADOOP-16793) | Remove WARN log when ipc connection interrupted in Client#handleSaslConnectionFailure() | Minor | . | Lisheng Sun | Lisheng Sun |
| [YARN-9462](https://issues.apache.org/jira/browse/YARN-9462) | TestResourceTrackerService.testNodeRemovalGracefully fails sporadically | Minor | resourcemanager, test | Prabhu Joseph | Prabhu Joseph |
| [YARN-9790](https://issues.apache.org/jira/browse/YARN-9790) | Failed to set default-application-lifetime if maximum-application-lifetime is less than or equal to zero | Major | . | kyungwan nam | kyungwan nam |
| [HDFS-14993](https://issues.apache.org/jira/browse/HDFS-14993) | checkDiskError doesn't work during datanode startup | Major | datanode | Yang Yun | Yang Yun |
| [HDFS-13179](https://issues.apache.org/jira/browse/HDFS-13179) | TestLazyPersistReplicaRecovery#testDnRestartWithSavedReplicas fails intermittently | Critical | fs | Gabor Bota | Ahmed Hussein |
| [MAPREDUCE-7259](https://issues.apache.org/jira/browse/MAPREDUCE-7259) | testSpeculateSuccessfulWithUpdateEvents fails Intermittently | Minor | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15146](https://issues.apache.org/jira/browse/HDFS-15146) | TestBalancerRPCDelay.testBalancerRPCDelay fails intermittently | Minor | . | Ahmed Hussein | Ahmed Hussein |
| [MAPREDUCE-7079](https://issues.apache.org/jira/browse/MAPREDUCE-7079) | JobHistory#ServiceStop implementation is incorrect | Major | . | Jason Darrell Lowe | Ahmed Hussein |
| [HDFS-15118](https://issues.apache.org/jira/browse/HDFS-15118) | [SBN Read] Slow clients when Observer reads are enabled but there are no Observers on the cluster. | Major | hdfs-client | Konstantin Shvachko | Chen Liang |
| [HDFS-7175](https://issues.apache.org/jira/browse/HDFS-7175) | Client-side SocketTimeoutException during Fsck | Major | namenode | Carl Steinbach | Stephen O'Donnell |
| [HDFS-15148](https://issues.apache.org/jira/browse/HDFS-15148) | dfs.namenode.send.qop.enabled should not apply to primary NN port | Major | . | Chen Liang | Chen Liang |
| [HADOOP-16410](https://issues.apache.org/jira/browse/HADOOP-16410) | Hadoop 3.2 azure jars incompatible with alpine 3.9 | Minor | fs/azure | Jose Luis Pedrosa | |
| [HDFS-15115](https://issues.apache.org/jira/browse/HDFS-15115) | Namenode crash caused by NPE in BlockPlacementPolicyDefault when dynamically change logger to debug | Major | . | wangzhixiang | wangzhixiang |
| [HDFS-15158](https://issues.apache.org/jira/browse/HDFS-15158) | The number of failed volumes mismatch with volumeFailures of Datanode metrics | Minor | datanode | Yang Yun | Yang Yun |
| [HADOOP-16849](https://issues.apache.org/jira/browse/HADOOP-16849) | start-build-env.sh behaves incorrectly when username is numeric only | Minor | build | Jihyun Cho | Jihyun Cho |
| [HDFS-15161](https://issues.apache.org/jira/browse/HDFS-15161) | When evictableMmapped or evictable size is zero, do not throw NoSuchElementException in ShortCircuitCache#close() | Major | . | Lisheng Sun | Lisheng Sun |
| [HDFS-15164](https://issues.apache.org/jira/browse/HDFS-15164) | Fix TestDelegationTokensWithHA | Major | . | Ayush Saxena | Ayush Saxena |
| [HADOOP-16868](https://issues.apache.org/jira/browse/HADOOP-16868) | ipc.Server readAndProcess threw NullPointerException | Major | rpc-server | Tsz-wo Sze | Tsz-wo Sze |
| [HADOOP-16869](https://issues.apache.org/jira/browse/HADOOP-16869) | Upgrade findbugs-maven-plugin to 3.0.5 to fix mvn findbugs:findbugs failure | Major | build | Akira Ajisaka | Akira Ajisaka |
| [HDFS-15052](https://issues.apache.org/jira/browse/HDFS-15052) | WebHDFS getTrashRoot leads to OOM due to FileSystem object creation | Major | webhdfs | Wei-Chiu Chuang | Masatake Iwasaki |
| [HDFS-15185](https://issues.apache.org/jira/browse/HDFS-15185) | StartupProgress reports edits segments until the entire startup completes | Major | namenode | Konstantin Shvachko | Konstantin Shvachko |
| [HDFS-15166](https://issues.apache.org/jira/browse/HDFS-15166) | Remove redundant field fStream in ByteStringLog | Major | . | Konstantin Shvachko | Xieming Li |
| [YARN-10143](https://issues.apache.org/jira/browse/YARN-10143) | YARN-10101 broke Yarn logs CLI | Blocker | yarn | Adam Antal | Adam Antal |
| [HADOOP-16841](https://issues.apache.org/jira/browse/HADOOP-16841) | The description of hadoop.http.authentication.signature.secret.file contains outdated information | Minor | documentation | Akira Ajisaka | Xieming Li |
| [YARN-10156](https://issues.apache.org/jira/browse/YARN-10156) | Fix typo 'complaint' which means quite different in Federation.md | Minor | documentation, federation | Sungpeo Kook | Sungpeo Kook |
| [HDFS-15147](https://issues.apache.org/jira/browse/HDFS-15147) | LazyPersistTestCase wait logic is error-prone | Minor | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-14668](https://issues.apache.org/jira/browse/HDFS-14668) | Support Fuse with Users from multiple Security Realms | Critical | fuse-dfs | Sailesh Patel | István Fajth |
| [HDFS-15111](https://issues.apache.org/jira/browse/HDFS-15111) | stopStandbyServices() should log which service state it is transitioning from. | Major | hdfs, logging | Konstantin Shvachko | Xieming Li |
| [HDFS-15199](https://issues.apache.org/jira/browse/HDFS-15199) | NPE in BlockSender | Major | . | Ayush Saxena | Ayush Saxena |
| [HADOOP-16891](https://issues.apache.org/jira/browse/HADOOP-16891) | Upgrade jackson-databind to 2.9.10.3 | Blocker | . | Siyao Meng | Siyao Meng |
| [HDFS-15204](https://issues.apache.org/jira/browse/HDFS-15204) | TestRetryCacheWithHA testRemoveCacheDescriptor fails intermittently | Major | hdfs | Ahmed Hussein | Ahmed Hussein |
| [HADOOP-16840](https://issues.apache.org/jira/browse/HADOOP-16840) | AliyunOSS: getFileStatus throws FileNotFoundException in versioning bucket | Major | fs/oss | wujinhu | wujinhu |
| [YARN-9419](https://issues.apache.org/jira/browse/YARN-9419) | Log a warning if GPU isolation is enabled but LinuxContainerExecutor is disabled | Major | . | Szilard Nemeth | Andras Gyori |
| [YARN-9427](https://issues.apache.org/jira/browse/YARN-9427) | TestContainerSchedulerQueuing.testKillOnlyRequiredOpportunisticContainers fails sporadically | Major | scheduler, test | Prabhu Joseph | Ahmed Hussein |
| [HDFS-15135](https://issues.apache.org/jira/browse/HDFS-15135) | EC : ArrayIndexOutOfBoundsException in BlockRecoveryWorker#RecoveryTaskStriped. | Major | erasure-coding | Surendra Singh Lilhore | Ravuri Sushma sree |
| [HDFS-14442](https://issues.apache.org/jira/browse/HDFS-14442) | Disagreement between HAUtil.getAddressOfActive and RpcInvocationHandler.getConnectionId | Major | . | Erik Krogen | Ravuri Sushma sree |
| [HDFS-15216](https://issues.apache.org/jira/browse/HDFS-15216) | Wrong Use Case of -showprogress in fsck | Major | . | Ravuri Sushma sree | Ravuri Sushma sree |
| [HDFS-15211](https://issues.apache.org/jira/browse/HDFS-15211) | EC: File write hangs during close in case of Exception during updatePipeline | Critical | . | Ayush Saxena | Ayush Saxena |
| [HDFS-15208](https://issues.apache.org/jira/browse/HDFS-15208) | Suppress bogus AbstractWadlGeneratorGrammarGenerator in KMS stderr in hdfs | Trivial | . | Wei-Chiu Chuang | Wei-Chiu Chuang |
| [HDFS-15223](https://issues.apache.org/jira/browse/HDFS-15223) | FSCK fails if one namenode is not available | Major | . | Ayush Saxena | Ayush Saxena |
| [HDFS-15232](https://issues.apache.org/jira/browse/HDFS-15232) | Fix libhdfspp test failures with GCC 7 | Major | native, test | Akira Ajisaka | Akira Ajisaka |
| [HDFS-15219](https://issues.apache.org/jira/browse/HDFS-15219) | DFS Client will stuck when ResponseProcessor.run throw Error | Major | hdfs-client | zhengchenyu | zhengchenyu |
| [HDFS-15191](https://issues.apache.org/jira/browse/HDFS-15191) | EOF when reading legacy buffer in BlockTokenIdentifier | Major | hdfs | Steven Rand | Steven Rand |
| [YARN-10202](https://issues.apache.org/jira/browse/YARN-10202) | Fix documentation about NodeAttributes. | Minor | documentation | Sen Zhao | Sen Zhao |
| [HADOOP-16949](https://issues.apache.org/jira/browse/HADOOP-16949) | pylint fails in the build environment | Critical | build | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-14836](https://issues.apache.org/jira/browse/HADOOP-14836) | Upgrade maven-clean-plugin to 3.1.0 | Major | build | Allen Wittenauer | Akira Ajisaka |
| [YARN-10207](https://issues.apache.org/jira/browse/YARN-10207) | CLOSE\_WAIT socket connection leaks during rendering of (corrupted) aggregated logs on the JobHistoryServer Web UI | Major | yarn | Siddharth Ahuja | Siddharth Ahuja |
| [HDFS-12862](https://issues.apache.org/jira/browse/HDFS-12862) | CacheDirective becomes invalid when NN restart or failover | Major | caching, hdfs | Wang XL | Wang XL |
| [MAPREDUCE-7272](https://issues.apache.org/jira/browse/MAPREDUCE-7272) | TaskAttemptListenerImpl excessive log messages | Major | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15283](https://issues.apache.org/jira/browse/HDFS-15283) | Cache pool MAXTTL is not persisted and restored on cluster restart | Major | namenode | Stephen O'Donnell | Stephen O'Donnell |
| [HADOOP-16944](https://issues.apache.org/jira/browse/HADOOP-16944) | Use Yetus 0.12.0 in GitHub PR | Major | build | Akira Ajisaka | Akira Ajisaka |
| [HDFS-15276](https://issues.apache.org/jira/browse/HDFS-15276) | Concat on INodeRefernce fails with illegal state exception | Critical | . | Hemanth Boyina | Hemanth Boyina |
| [YARN-10223](https://issues.apache.org/jira/browse/YARN-10223) | Duplicate jersey-test-framework-core dependency in yarn-server-common | Minor | build | Akira Ajisaka | Akira Ajisaka |
| [HDFS-15281](https://issues.apache.org/jira/browse/HDFS-15281) | ZKFC ignores dfs.namenode.rpc-bind-host and uses dfs.namenode.rpc-address to bind to host address | Major | ha, namenode | Dhiraj Hegde | Dhiraj Hegde |
| [HDFS-15297](https://issues.apache.org/jira/browse/HDFS-15297) | TestNNHandlesBlockReportPerStorage::blockReport\_02 fails intermittently in trunk | Major | datanode, test | Mingliang Liu | Ayush Saxena |
| [HADOOP-17014](https://issues.apache.org/jira/browse/HADOOP-17014) | Upgrade jackson-databind to 2.9.10.4 | Blocker | . | Siyao Meng | Siyao Meng |
| [YARN-9848](https://issues.apache.org/jira/browse/YARN-9848) | revert YARN-4946 | Blocker | log-aggregation, resourcemanager | Steven Rand | Steven Rand |
| [HDFS-15286](https://issues.apache.org/jira/browse/HDFS-15286) | Concat on a same files deleting the file | Critical | . | Hemanth Boyina | Hemanth Boyina |
| [YARN-10256](https://issues.apache.org/jira/browse/YARN-10256) | Refactor TestContainerSchedulerQueuing.testContainerUpdateExecTypeGuaranteedToOpportunistic | Major | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15270](https://issues.apache.org/jira/browse/HDFS-15270) | Account for \*env == NULL in hdfsThreadDestructor | Major | . | Babneet Singh | Babneet Singh |
| [YARN-8959](https://issues.apache.org/jira/browse/YARN-8959) | TestContainerResizing fails randomly | Minor | . | Bibin Chundatt | Ahmed Hussein |
| [HDFS-15323](https://issues.apache.org/jira/browse/HDFS-15323) | StandbyNode fails transition to active due to insufficient transaction tailing | Major | namenode, qjm | Konstantin Shvachko | Konstantin Shvachko |
| [HADOOP-17025](https://issues.apache.org/jira/browse/HADOOP-17025) | Fix invalid metastore configuration in S3GuardTool tests | Minor | fs/s3, test | Masatake Iwasaki | Masatake Iwasaki |
| [HDFS-15339](https://issues.apache.org/jira/browse/HDFS-15339) | TestHDFSCLI fails for user names with the dot/dash character | Major | test | Yan Xiaole | Yan Xiaole |
| [HDFS-15250](https://issues.apache.org/jira/browse/HDFS-15250) | Setting \`dfs.client.use.datanode.hostname\` to true can crash the system because of unhandled UnresolvedAddressException | Major | . | Ctest | Ctest |
| [HDFS-14367](https://issues.apache.org/jira/browse/HDFS-14367) | EC: Parameter maxPoolSize in striped reconstruct thread pool isn't affecting number of threads | Major | ec | Guo Lei | Guo Lei |
| [HADOOP-15565](https://issues.apache.org/jira/browse/HADOOP-15565) | ViewFileSystem.close doesn't close child filesystems and causes FileSystem objects leak. | Major | . | Jinglun | Jinglun |
| [YARN-9444](https://issues.apache.org/jira/browse/YARN-9444) | YARN API ResourceUtils's getRequestedResourcesFromConfig doesn't recognize yarn.io/gpu as a valid resource | Minor | api | Gergely Pollak | Gergely Pollak |
| [HADOOP-17044](https://issues.apache.org/jira/browse/HADOOP-17044) | Revert "HADOOP-8143. Change distcp to have -pb on by default" | Major | tools/distcp | Steve Loughran | Steve Loughran |
| [HDFS-15293](https://issues.apache.org/jira/browse/HDFS-15293) | Relax the condition for accepting a fsimage when receiving a checkpoint | Critical | namenode | Chen Liang | Chen Liang |
| [HADOOP-17024](https://issues.apache.org/jira/browse/HADOOP-17024) | ListStatus on ViewFS root (ls "/") should list the linkFallBack root (configured target root). | Major | fs, viewfs | Uma Maheswara Rao G | Abhishek Das |
| [HADOOP-17040](https://issues.apache.org/jira/browse/HADOOP-17040) | Fix intermittent failure of ITestBlockingThreadPoolExecutorService | Minor | fs/s3, test | Masatake Iwasaki | Masatake Iwasaki |
| [HDFS-15363](https://issues.apache.org/jira/browse/HDFS-15363) | BlockPlacementPolicyWithNodeGroup should validate if it is initialized by NetworkTopologyWithNodeGroup | Major | . | Hemanth Boyina | Hemanth Boyina |
| [MAPREDUCE-7278](https://issues.apache.org/jira/browse/MAPREDUCE-7278) | Speculative execution behavior is observed even when mapreduce.map.speculative and mapreduce.reduce.speculative are false | Major | task | Tarun Parimi | Tarun Parimi |
| [HADOOP-7002](https://issues.apache.org/jira/browse/HADOOP-7002) | Wrong description of copyFromLocal and copyToLocal in documentation | Minor | . | Jingguo Yao | Andras Bokor |
| [HADOOP-17052](https://issues.apache.org/jira/browse/HADOOP-17052) | NetUtils.connect() throws unchecked exception (UnresolvedAddressException) causing clients to abort | Major | net | Dhiraj Hegde | Dhiraj Hegde |
| [HADOOP-17062](https://issues.apache.org/jira/browse/HADOOP-17062) | Fix shelldocs path in Jenkinsfile | Major | build | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-17056](https://issues.apache.org/jira/browse/HADOOP-17056) | shelldoc fails in hadoop-common | Major | build | Akira Ajisaka | Akira Ajisaka |
| [YARN-10286](https://issues.apache.org/jira/browse/YARN-10286) | PendingContainers bugs in the scheduler outputs | Critical | . | Adam Antal | Andras Gyori |
| [HDFS-15396](https://issues.apache.org/jira/browse/HDFS-15396) | Fix TestViewFileSystemOverloadSchemeHdfsFileSystemContract#testListStatusRootDir | Major | . | Ayush Saxena | Ayush Saxena |
| [HDFS-15386](https://issues.apache.org/jira/browse/HDFS-15386) | ReplicaNotFoundException keeps happening in DN after removing multiple DN's data directories | Major | . | Toshihiro Suzuki | Toshihiro Suzuki |
| [YARN-10300](https://issues.apache.org/jira/browse/YARN-10300) | appMasterHost not set in RM ApplicationSummary when AM fails before first heartbeat | Major | . | Eric Badger | Eric Badger |
| [HADOOP-17059](https://issues.apache.org/jira/browse/HADOOP-17059) | ArrayIndexOfboundsException in ViewFileSystem#listStatus | Major | viewfs | Hemanth Boyina | Hemanth Boyina |
| [YARN-10296](https://issues.apache.org/jira/browse/YARN-10296) | Make ContainerPBImpl#getId/setId synchronized | Minor | . | Benjamin Teke | Benjamin Teke |
| [YARN-10295](https://issues.apache.org/jira/browse/YARN-10295) | CapacityScheduler NPE can cause apps to get stuck without resources | Major | capacityscheduler | Benjamin Teke | Benjamin Teke |
| [HADOOP-17060](https://issues.apache.org/jira/browse/HADOOP-17060) | listStatus and getFileStatus behave inconsistent in the case of ViewFs implementation for isDirectory | Major | viewfs | Srinivasu Majeti | Uma Maheswara Rao G |
| [YARN-10312](https://issues.apache.org/jira/browse/YARN-10312) | Add support for yarn logs -logFile to retain backward compatibility | Major | client | Jim Brennan | Jim Brennan |
| [HDFS-15403](https://issues.apache.org/jira/browse/HDFS-15403) | NPE in FileIoProvider#transferToSocketFully | Major | . | Hemanth Boyina | Hemanth Boyina |
| [HADOOP-17029](https://issues.apache.org/jira/browse/HADOOP-17029) | ViewFS does not return correct user/group and ACL | Major | fs, viewfs | Abhishek Das | Abhishek Das |
| [HDFS-15421](https://issues.apache.org/jira/browse/HDFS-15421) | IBR leak causes standby NN to be stuck in safe mode | Blocker | namenode | Kihwal Lee | Akira Ajisaka |
| [YARN-9903](https://issues.apache.org/jira/browse/YARN-9903) | Support reservations continue looking for Node Labels | Major | . | Tarun Parimi | Jim Brennan |
| [HADOOP-17032](https://issues.apache.org/jira/browse/HADOOP-17032) | Handle an internal dir in viewfs having multiple children mount points pointing to different filesystems | Major | fs, viewfs | Abhishek Das | Abhishek Das |
| [HDFS-15446](https://issues.apache.org/jira/browse/HDFS-15446) | CreateSnapshotOp fails during edit log loading for /.reserved/raw/path with error java.io.FileNotFoundException: Directory does not exist: /.reserved/raw/path | Major | hdfs | Srinivasu Majeti | Stephen O'Donnell |
| [HADOOP-17081](https://issues.apache.org/jira/browse/HADOOP-17081) | MetricsSystem doesn't start the sink adapters on restart | Minor | metrics | Madhusoodan | Madhusoodan |
| [HDFS-15451](https://issues.apache.org/jira/browse/HDFS-15451) | Restarting name node stuck in safe mode when using provided storage | Major | namenode | shanyu zhao | shanyu zhao |
| [HADOOP-17120](https://issues.apache.org/jira/browse/HADOOP-17120) | Fix failure of docker image creation due to pip2 install error | Major | . | Masatake Iwasaki | Masatake Iwasaki |
| [YARN-10347](https://issues.apache.org/jira/browse/YARN-10347) | Fix double locking in CapacityScheduler#reinitialize in branch-3.1 | Critical | capacity scheduler | Masatake Iwasaki | Masatake Iwasaki |
| [YARN-10348](https://issues.apache.org/jira/browse/YARN-10348) | Allow RM to always cancel tokens after app completes | Major | yarn | Jim Brennan | Jim Brennan |
| [MAPREDUCE-7284](https://issues.apache.org/jira/browse/MAPREDUCE-7284) | TestCombineFileInputFormat#testMissingBlocks fails | Major | test | Akira Ajisaka | Akira Ajisaka |
| [HDFS-14498](https://issues.apache.org/jira/browse/HDFS-14498) | LeaseManager can loop forever on the file for which create has failed | Major | namenode | Sergey Shelukhin | Stephen O'Donnell |
| [HADOOP-17130](https://issues.apache.org/jira/browse/HADOOP-17130) | Configuration.getValByRegex() shouldn't update the results while fetching. | Major | common | Mukund Thakur | Mukund Thakur |
| [HADOOP-17119](https://issues.apache.org/jira/browse/HADOOP-17119) | Jetty upgrade to 9.4.x causes MR app fail with IOException | Major | . | Bilwa S T | Bilwa S T |
| [YARN-4771](https://issues.apache.org/jira/browse/YARN-4771) | Some containers can be skipped during log aggregation after NM restart | Major | nodemanager | Jason Darrell Lowe | Jim Brennan |
| [MAPREDUCE-7051](https://issues.apache.org/jira/browse/MAPREDUCE-7051) | Fix typo in MultipleOutputFormat | Trivial | . | ywheel | ywheel |
| [HDFS-15313](https://issues.apache.org/jira/browse/HDFS-15313) | Ensure inodes in active filesystem are not deleted during snapshot delete | Major | snapshots | Shashikant Banerjee | Shashikant Banerjee |
| [HDFS-14950](https://issues.apache.org/jira/browse/HDFS-14950) | missing libhdfspp libs in dist-package | Major | build, libhdfs++ | Yuan Zhou | Yuan Zhou |
| [HADOOP-17184](https://issues.apache.org/jira/browse/HADOOP-17184) | Add --mvn-custom-repos parameter to yetus calls | Major | build | Mingliang Liu | Mingliang Liu |
| [HDFS-15499](https://issues.apache.org/jira/browse/HDFS-15499) | Clean up httpfs/pom.xml to remove aws-java-sdk-s3 exclusion | Major | httpfs | Mingliang Liu | Mingliang Liu |
| [HADOOP-17164](https://issues.apache.org/jira/browse/HADOOP-17164) | UGI loginUserFromKeytab doesn't set the last login time | Major | security | Sandeep Guggilam | Sandeep Guggilam |
| [YARN-4575](https://issues.apache.org/jira/browse/YARN-4575) | ApplicationResourceUsageReport should return ALL reserved resource | Major | . | Bibin Chundatt | Bibin Chundatt |
| [HADOOP-17196](https://issues.apache.org/jira/browse/HADOOP-17196) | Fix C/C++ standard warnings | Major | build | Gautham Banasandra | Gautham Banasandra |
| [HADOOP-17204](https://issues.apache.org/jira/browse/HADOOP-17204) | Fix typo in Hadoop KMS document | Trivial | documentation, kms | Akira Ajisaka | Xieming Li |
| [HADOOP-17209](https://issues.apache.org/jira/browse/HADOOP-17209) | Erasure Coding: Native library memory leak | Major | native | Sean Chow | Sean Chow |
| [HADOOP-16925](https://issues.apache.org/jira/browse/HADOOP-16925) | MetricsConfig incorrectly loads the configuration whose value is String list in the properties file | Major | metrics | Jiayi Liu | Jiayi Liu |
| [HDFS-14852](https://issues.apache.org/jira/browse/HDFS-14852) | Removing from LowRedundancyBlocks does not remove the block from all queues | Major | namenode | Hui Fei | Hui Fei |
| [HDFS-15290](https://issues.apache.org/jira/browse/HDFS-15290) | NPE in HttpServer during NameNode startup | Major | namenode | Konstantin Shvachko | Simbarashe Dzinamarira |
| [YARN-10430](https://issues.apache.org/jira/browse/YARN-10430) | Log improvements in NodeStatusUpdaterImpl | Minor | nodemanager | Bilwa S T | Bilwa S T |
| [MAPREDUCE-7294](https://issues.apache.org/jira/browse/MAPREDUCE-7294) | Only application master should upload resource to Yarn Shared Cache | Major | mrv2 | zhenzhao wang | zhenzhao wang |
| [MAPREDUCE-7289](https://issues.apache.org/jira/browse/MAPREDUCE-7289) | Fix wrong comment in LongLong.java | Trivial | documentation, examples | Akira Ajisaka | Wanqiang Ji |
| [YARN-9809](https://issues.apache.org/jira/browse/YARN-9809) | NMs should supply a health status when registering with RM | Major | . | Eric Badger | Eric Badger |
| [YARN-10393](https://issues.apache.org/jira/browse/YARN-10393) | MR job live lock caused by completed state container leak in heartbeat between node manager and RM | Major | nodemanager, yarn | zhenzhao wang | Jim Brennan |
| [YARN-10455](https://issues.apache.org/jira/browse/YARN-10455) | TestNMProxy.testNMProxyRPCRetry is not consistent | Major | . | Ahmed Hussein | Ahmed Hussein |
| [HADOOP-17223](https://issues.apache.org/jira/browse/HADOOP-17223) | update org.apache.httpcomponents:httpclient to 4.5.13 and httpcore to 4.4.13 | Blocker | . | Pranav Bheda | Pranav Bheda |
| [HDFS-15628](https://issues.apache.org/jira/browse/HDFS-15628) | HttpFS server throws NPE if a file is a symlink | Major | fs, httpfs | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15627](https://issues.apache.org/jira/browse/HDFS-15627) | Audit log deletes before collecting blocks | Major | logging, namenode | Ahmed Hussein | Ahmed Hussein |
| [HADOOP-17309](https://issues.apache.org/jira/browse/HADOOP-17309) | Javadoc warnings and errors are ignored in the precommit jobs | Major | build, documentation | Akira Ajisaka | Akira Ajisaka |
| [HDFS-15639](https://issues.apache.org/jira/browse/HDFS-15639) | [JDK 11] Fix Javadoc errors in hadoop-hdfs-client | Major | . | Takanobu Asanuma | Takanobu Asanuma |
| [HDFS-15618](https://issues.apache.org/jira/browse/HDFS-15618) | Improve datanode shutdown latency | Major | datanode | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15622](https://issues.apache.org/jira/browse/HDFS-15622) | Deleted blocks linger in the replications queue | Major | hdfs | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15641](https://issues.apache.org/jira/browse/HDFS-15641) | DataNode could meet deadlock if invoke refreshNameNode | Critical | . | Hongbing Wang | Hongbing Wang |
| [HDFS-15644](https://issues.apache.org/jira/browse/HDFS-15644) | Failed volumes can cause DNs to stop block reporting | Major | block placement, datanode | Ahmed Hussein | Ahmed Hussein |
| [YARN-10467](https://issues.apache.org/jira/browse/YARN-10467) | ContainerIdPBImpl objects can be leaked in RMNodeImpl.completedContainers | Major | resourcemanager | Haibo Chen | Haibo Chen |
| [HADOOP-17329](https://issues.apache.org/jira/browse/HADOOP-17329) | mvn site commands fails due to MetricsSystemImpl changes | Major | . | Xiaoqiao He | Xiaoqiao He |
| [YARN-10472](https://issues.apache.org/jira/browse/YARN-10472) | Backport YARN-10314 to branch-3.2 | Blocker | yarn | Siyao Meng | Siyao Meng |
| [HADOOP-17340](https://issues.apache.org/jira/browse/HADOOP-17340) | TestLdapGroupsMapping failing -string mismatch in exception validation | Major | test | Steve Loughran | Steve Loughran |
| [HADOOP-17352](https://issues.apache.org/jira/browse/HADOOP-17352) | Update PATCH\_NAMING\_RULE in the personality file | Minor | build | Akira Ajisaka | Akira Ajisaka |
| [HADOOP-17096](https://issues.apache.org/jira/browse/HADOOP-17096) | ZStandardCompressor throws java.lang.InternalError: Error (generic) | Major | io | Stephen Jung (Stripe) | Stephen Jung (Stripe) |
| [HADOOP-17358](https://issues.apache.org/jira/browse/HADOOP-17358) | Improve excessive reloading of Configurations | Major | conf | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15538](https://issues.apache.org/jira/browse/HDFS-15538) | Fix the documentation for dfs.namenode.replication.max-streams in hdfs-default.xml | Major | . | Xieming Li | Xieming Li |
| [HADOOP-17362](https://issues.apache.org/jira/browse/HADOOP-17362) | Doing hadoop ls on Har file triggers too many RPC calls | Major | fs | Ahmed Hussein | Ahmed Hussein |
| [YARN-10485](https://issues.apache.org/jira/browse/YARN-10485) | TimelineConnector swallows InterruptedException | Major | . | Ahmed Hussein | Ahmed Hussein |
| [HADOOP-17360](https://issues.apache.org/jira/browse/HADOOP-17360) | Log the remote address for authentication success | Minor | ipc | Ahmed Hussein | Ahmed Hussein |
| [YARN-10396](https://issues.apache.org/jira/browse/YARN-10396) | Max applications calculation per queue disregards queue level settings in absolute mode | Major | capacity scheduler | Benjamin Teke | Benjamin Teke |
| [HADOOP-17346](https://issues.apache.org/jira/browse/HADOOP-17346) | Fair call queue is defeated by abusive service principals | Major | common, ipc | Ahmed Hussein | Ahmed Hussein |
| [YARN-10470](https://issues.apache.org/jira/browse/YARN-10470) | When building new web ui with root user, the bower install should support it. | Major | build, yarn-ui-v2 | zhuqi | zhuqi |
| [HADOOP-16080](https://issues.apache.org/jira/browse/HADOOP-16080) | hadoop-aws does not work with hadoop-client-api | Major | fs/s3 | Keith Turner | Chao Sun |
| [HDFS-15707](https://issues.apache.org/jira/browse/HDFS-15707) | NNTop counts don't add up as expected | Major | hdfs, metrics, namenode | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15709](https://issues.apache.org/jira/browse/HDFS-15709) | EC: Socket file descriptor leak in StripedBlockChecksumReconstructor | Major | datanode, ec, erasure-coding | Yushi Hayasaka | Yushi Hayasaka |
| [HDFS-15240](https://issues.apache.org/jira/browse/HDFS-15240) | Erasure Coding: dirty buffer causes reconstruction block error | Blocker | datanode, erasure-coding | HuangTao | HuangTao |
### TESTS:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [YARN-10072](https://issues.apache.org/jira/browse/YARN-10072) | TestCSAllocateCustomResource failures | Major | yarn | Jim Brennan | Jim Brennan |
| [YARN-10161](https://issues.apache.org/jira/browse/YARN-10161) | TestRouterWebServicesREST is corrupting STDOUT | Minor | yarn | Jim Brennan | Jim Brennan |
| [HADOOP-14206](https://issues.apache.org/jira/browse/HADOOP-14206) | TestSFTPFileSystem#testFileExists failure: Invalid encoding for signature | Major | fs, test | John Zhuge | Jim Brennan |
| [MAPREDUCE-7288](https://issues.apache.org/jira/browse/MAPREDUCE-7288) | Fix TestLongLong#testRightShift | Minor | . | Wanqiang Ji | Wanqiang Ji |
| [HDFS-15514](https://issues.apache.org/jira/browse/HDFS-15514) | Remove useless dfs.webhdfs.enabled | Minor | test | Hui Fei | Hui Fei |
| [HADOOP-17205](https://issues.apache.org/jira/browse/HADOOP-17205) | Move personality file from Yetus to Hadoop repository | Major | test, yetus | Chao Sun | Chao Sun |
### SUB-TASKS:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-15775](https://issues.apache.org/jira/browse/HADOOP-15775) | [JDK9] Add missing javax.activation-api dependency | Critical | test | Akira Ajisaka | Akira Ajisaka |
| [HDFS-14096](https://issues.apache.org/jira/browse/HDFS-14096) | [SPS] : Add Support for Storage Policy Satisfier in ViewFs | Major | federation | Ayush Saxena | Ayush Saxena |
| [HADOOP-15787](https://issues.apache.org/jira/browse/HADOOP-15787) | [JDK11] TestIPC.testRTEDuringConnectionSetup fails | Major | . | Akira Ajisaka | Zsolt Venczel |
| [HDFS-14262](https://issues.apache.org/jira/browse/HDFS-14262) | [SBN read] Unclear Log.WARN message in GlobalStateIdContext | Major | hdfs | Shweta | Shweta |
| [YARN-7243](https://issues.apache.org/jira/browse/YARN-7243) | Moving logging APIs over to slf4j in hadoop-yarn-server-resourcemanager | Major | . | Yeliang Cang | Prabhu Joseph |
| [HDFS-13404](https://issues.apache.org/jira/browse/HDFS-13404) | RBF: TestRouterWebHDFSContractAppend.testRenameFileBeingAppended fails | Major | test | Takanobu Asanuma | Takanobu Asanuma |
| [HADOOP-16117](https://issues.apache.org/jira/browse/HADOOP-16117) | Update AWS SDK to 1.11.563 | Major | build, fs/s3 | Steve Loughran | Steve Loughran |
| [HDFS-14590](https://issues.apache.org/jira/browse/HDFS-14590) | [SBN Read] Add the document link to the top page | Major | documentation | Takanobu Asanuma | Takanobu Asanuma |
| [YARN-9791](https://issues.apache.org/jira/browse/YARN-9791) | Queue Mutation API does not allow to remove a config | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [HDFS-14822](https://issues.apache.org/jira/browse/HDFS-14822) | [SBN read] Revisit GlobalStateIdContext locking when getting server state id | Major | hdfs | Chen Liang | Chen Liang |
| [HDFS-14785](https://issues.apache.org/jira/browse/HDFS-14785) | [SBN read] Change client logging to be less aggressive | Major | hdfs | Chen Liang | Chen Liang |
| [YARN-9864](https://issues.apache.org/jira/browse/YARN-9864) | Format CS Configuration present in Configuration Store | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [YARN-9801](https://issues.apache.org/jira/browse/YARN-9801) | SchedConfCli does not work with https mode | Major | . | Prabhu Joseph | Prabhu Joseph |
| [HDFS-14858](https://issues.apache.org/jira/browse/HDFS-14858) | [SBN read] Allow configurably enable/disable AlignmentContext on NameNode | Major | hdfs | Chen Liang | Chen Liang |
| [HDFS-12979](https://issues.apache.org/jira/browse/HDFS-12979) | StandbyNode should upload FsImage to ObserverNode after checkpointing. | Major | hdfs | Konstantin Shvachko | Chen Liang |
| [YARN-9873](https://issues.apache.org/jira/browse/YARN-9873) | Mutation API Config Change need to update Version Number | Major | . | Prabhu Joseph | Prabhu Joseph |
| [HDFS-14162](https://issues.apache.org/jira/browse/HDFS-14162) | Balancer should work with ObserverNode | Major | . | Konstantin Shvachko | Erik Krogen |
| [YARN-9773](https://issues.apache.org/jira/browse/YARN-9773) | Add QueueMetrics for Custom Resources | Major | . | Manikandan R | Manikandan R |
| [HADOOP-16598](https://issues.apache.org/jira/browse/HADOOP-16598) | Backport "HADOOP-16558 [COMMON+HDFS] use protobuf-maven-plugin to generate protobuf classes" to all active branches | Major | common | Duo Zhang | Duo Zhang |
| [YARN-9950](https://issues.apache.org/jira/browse/YARN-9950) | Unset Ordering Policy of Leaf/Parent queue converted from Parent/Leaf queue respectively | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [YARN-9900](https://issues.apache.org/jira/browse/YARN-9900) | Revert to previous state when Invalid Config is applied and Refresh Support in SchedulerConfig Format | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [HADOOP-16610](https://issues.apache.org/jira/browse/HADOOP-16610) | Upgrade to yetus 0.11.1 and use emoji vote on github pre commit | Major | build | Duo Zhang | Duo Zhang |
| [YARN-9909](https://issues.apache.org/jira/browse/YARN-9909) | Offline format of YarnConfigurationStore | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [YARN-9836](https://issues.apache.org/jira/browse/YARN-9836) | General usability improvements in showSimulationTrace.html | Minor | scheduler-load-simulator | Adam Antal | Adam Antal |
| [HADOOP-16612](https://issues.apache.org/jira/browse/HADOOP-16612) | Track Azure Blob File System client-perceived latency | Major | fs/azure, hdfs-client | Jeetesh Mangwani | Jeetesh Mangwani |
| [HADOOP-16758](https://issues.apache.org/jira/browse/HADOOP-16758) | Refine testing.md to tell user better how to use auth-keys.xml | Minor | fs/s3 | Mingliang Liu | Mingliang Liu |
| [HADOOP-16609](https://issues.apache.org/jira/browse/HADOOP-16609) | Add Jenkinsfile for all active branches | Major | build | Duo Zhang | Akira Ajisaka |
| [HADOOP-16785](https://issues.apache.org/jira/browse/HADOOP-16785) | Improve wasb and abfs resilience on double close() calls | Major | fs/azure | Steve Loughran | Steve Loughran |
| [YARN-10026](https://issues.apache.org/jira/browse/YARN-10026) | Pull out common code pieces from ATS v1.5 and v2 | Major | ATSv2, yarn | Adam Antal | Adam Antal |
| [YARN-10028](https://issues.apache.org/jira/browse/YARN-10028) | Integrate the new abstract log servlet to the JobHistory server | Major | yarn | Adam Antal | Adam Antal |
| [YARN-10083](https://issues.apache.org/jira/browse/YARN-10083) | Provide utility to ask whether an application is in final status | Minor | . | Adam Antal | Adam Antal |
| [YARN-10109](https://issues.apache.org/jira/browse/YARN-10109) | Allow stop and convert from leaf to parent queue in a single Mutation API call | Major | capacity scheduler | Prabhu Joseph | Prabhu Joseph |
| [YARN-10101](https://issues.apache.org/jira/browse/YARN-10101) | Support listing of aggregated logs for containers belonging to an application attempt | Major | log-aggregation, yarn | Adam Antal | Adam Antal |
| [YARN-10022](https://issues.apache.org/jira/browse/YARN-10022) | Create RM Rest API to validate a CapacityScheduler Configuration | Major | . | Kinga Marton | Kinga Marton |
| [HDFS-15173](https://issues.apache.org/jira/browse/HDFS-15173) | RBF: Delete repeated configuration 'dfs.federation.router.metrics.enable' | Minor | documentation, rbf | panlijie | panlijie |
| [YARN-10139](https://issues.apache.org/jira/browse/YARN-10139) | ValidateAndGetSchedulerConfiguration API fails when cluster max allocation \> default 8GB | Major | . | Prabhu Joseph | Prabhu Joseph |
| [HDFS-14731](https://issues.apache.org/jira/browse/HDFS-14731) | [FGL] Remove redundant locking on NameNode. | Major | namenode | Konstantin Shvachko | Konstantin Shvachko |
| [YARN-10194](https://issues.apache.org/jira/browse/YARN-10194) | YARN RMWebServices /scheduler-conf/validate leaks ZK Connections | Blocker | capacityscheduler | Akhil PB | Prabhu Joseph |
| [HDFS-14353](https://issues.apache.org/jira/browse/HDFS-14353) | Erasure Coding: metrics xmitsInProgress become to negative. | Major | datanode, erasure-coding | Baolong Mao | Baolong Mao |
| [HDFS-15305](https://issues.apache.org/jira/browse/HDFS-15305) | Extend ViewFS and provide ViewFSOverloadScheme implementation with scheme configurable. | Major | fs, hadoop-client, hdfs-client, viewfs | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15306](https://issues.apache.org/jira/browse/HDFS-15306) | Make mount-table to read from central place ( Let's say from HDFS) | Major | configuration, hadoop-client | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HADOOP-16756](https://issues.apache.org/jira/browse/HADOOP-16756) | distcp -update to S3A; abfs, etc always overwrites due to block size mismatch | Major | fs/s3, tools/distcp | Daisuke Kobayashi | Steve Loughran |
| [HDFS-15322](https://issues.apache.org/jira/browse/HDFS-15322) | Make NflyFS to work when ViewFsOverloadScheme's scheme and target uris schemes are same. | Major | fs, nflyFs, viewfs, viewfsOverloadScheme | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15321](https://issues.apache.org/jira/browse/HDFS-15321) | Make DFSAdmin tool to work with ViewFSOverloadScheme | Major | dfsadmin, fs, viewfs | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15330](https://issues.apache.org/jira/browse/HDFS-15330) | Document the ViewFSOverloadScheme details in ViewFS guide | Major | viewfs, viewfsOverloadScheme | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15389](https://issues.apache.org/jira/browse/HDFS-15389) | DFSAdmin should close filesystem and dfsadmin -setBalancerBandwidth should work with ViewFSOverloadScheme | Major | dfsadmin, viewfsOverloadScheme | Ayush Saxena | Ayush Saxena |
| [HDFS-15394](https://issues.apache.org/jira/browse/HDFS-15394) | Add all available fs.viewfs.overload.scheme.target.\<scheme\>.impl classes in core-default.xml bydefault. | Major | configuration, viewfs, viewfsOverloadScheme | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15387](https://issues.apache.org/jira/browse/HDFS-15387) | FSUsage$DF should consider ViewFSOverloadScheme in processPath | Minor | viewfs | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15418](https://issues.apache.org/jira/browse/HDFS-15418) | ViewFileSystemOverloadScheme should represent mount links as non symlinks | Major | . | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15427](https://issues.apache.org/jira/browse/HDFS-15427) | Merged ListStatus with Fallback target filesystem and InternalDirViewFS. | Major | viewfs | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15429](https://issues.apache.org/jira/browse/HDFS-15429) | mkdirs should work when parent dir is internalDir and fallback configured. | Major | . | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15436](https://issues.apache.org/jira/browse/HDFS-15436) | Default mount table name used by ViewFileSystem should be configurable | Major | viewfs, viewfsOverloadScheme | Virajith Jalaparti | Virajith Jalaparti |
| [HDFS-15450](https://issues.apache.org/jira/browse/HDFS-15450) | Fix NN trash emptier to work if ViewFSOveroadScheme enabled | Major | namenode, viewfsOverloadScheme | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HDFS-15462](https://issues.apache.org/jira/browse/HDFS-15462) | Add fs.viewfs.overload.scheme.target.ofs.impl to core-default.xml | Major | configuration, viewfs, viewfsOverloadScheme | Siyao Meng | Siyao Meng |
| [HDFS-15464](https://issues.apache.org/jira/browse/HDFS-15464) | ViewFsOverloadScheme should work when -fs option pointing to remote cluster without mount links | Major | viewfsOverloadScheme | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HADOOP-17101](https://issues.apache.org/jira/browse/HADOOP-17101) | Replace Guava Function with Java8+ Function | Major | . | Ahmed Hussein | Ahmed Hussein |
| [HADOOP-17099](https://issues.apache.org/jira/browse/HADOOP-17099) | Replace Guava Predicate with Java8+ Predicate | Minor | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15478](https://issues.apache.org/jira/browse/HDFS-15478) | When Empty mount points, we are assigning fallback link to self. But it should not use full URI for target fs. | Major | . | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HADOOP-17100](https://issues.apache.org/jira/browse/HADOOP-17100) | Replace Guava Supplier with Java8+ Supplier in Hadoop | Major | . | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15515](https://issues.apache.org/jira/browse/HDFS-15515) | mkdirs on fallback should throw IOE out instead of suppressing and returning false | Major | . | Uma Maheswara Rao G | Uma Maheswara Rao G |
| [HADOOP-17199](https://issues.apache.org/jira/browse/HADOOP-17199) | Backport HADOOP-13230 list/getFileStatus changes for preserved directory markers | Major | fs/s3 | Steve Loughran | Steve Loughran |
| [HDFS-8631](https://issues.apache.org/jira/browse/HDFS-8631) | WebHDFS : Support setQuota | Major | . | nijel | Chao Sun |
| [YARN-10332](https://issues.apache.org/jira/browse/YARN-10332) | RESOURCE\_UPDATE event was repeatedly registered in DECOMMISSIONING state | Minor | resourcemanager | yehuanhuan | yehuanhuan |
| [HDFS-15459](https://issues.apache.org/jira/browse/HDFS-15459) | TestBlockTokenWithDFSStriped fails intermittently | Major | hdfs | Ahmed Hussein | Ahmed Hussein |
| [HDFS-15461](https://issues.apache.org/jira/browse/HDFS-15461) | TestDFSClientRetries#testGetFileChecksum fails intermittently | Major | dfsclient, test | Ahmed Hussein | Ahmed Hussein |
| [HDFS-9776](https://issues.apache.org/jira/browse/HDFS-9776) | TestHAAppend#testMultipleAppendsDuringCatchupTailing is flaky | Major | . | Vinayakumar B | Ahmed Hussein |
| [HADOOP-17330](https://issues.apache.org/jira/browse/HADOOP-17330) | Backport HADOOP-16005-"NativeAzureFileSystem does not support setXAttr" to branch-3.2 | Major | fs/azure | Sally Zuo | Sally Zuo |
| [HDFS-15643](https://issues.apache.org/jira/browse/HDFS-15643) | EC: Fix checksum computation in case of native encoders | Blocker | . | Ahmed Hussein | Ayush Saxena |
| [HADOOP-17343](https://issues.apache.org/jira/browse/HADOOP-17343) | Upgrade aws-java-sdk to 1.11.901 | Minor | build, fs/s3 | Dongjoon Hyun | Steve Loughran |
| [HADOOP-17325](https://issues.apache.org/jira/browse/HADOOP-17325) | WASB: Test failures | Major | fs/azure, test | Sneha Vijayarajan | Steve Loughran |
| [HDFS-15708](https://issues.apache.org/jira/browse/HDFS-15708) | TestURLConnectionFactory fails by NoClassDefFoundError in branch-3.3 and branch-3.2 | Blocker | test | Akira Ajisaka | Chao Sun |
### OTHER:
| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HDFS-14394](https://issues.apache.org/jira/browse/HDFS-14394) | Add -std=c99 / -std=gnu99 to libhdfs compile flags | Major | hdfs-client, libhdfs, native | Sahil Takiar | Sahil Takiar |
| [HADOOP-16365](https://issues.apache.org/jira/browse/HADOOP-16365) | Upgrade jackson-databind to 2.9.9 | Major | build | Shweta | Shweta |
| [HADOOP-16491](https://issues.apache.org/jira/browse/HADOOP-16491) | Upgrade jetty version to 9.3.27 | Major | . | Hrishikesh Gadre | Hrishikesh Gadre |
| [HADOOP-16542](https://issues.apache.org/jira/browse/HADOOP-16542) | Update commons-beanutils version to 1.9.4 | Major | . | Wei-Chiu Chuang | Kevin Su |
| [YARN-9730](https://issues.apache.org/jira/browse/YARN-9730) | Support forcing configured partitions to be exclusive based on app node label | Major | . | Jonathan Hung | Jonathan Hung |
| [HADOOP-16675](https://issues.apache.org/jira/browse/HADOOP-16675) | Upgrade jackson-databind to 2.9.10.1 | Blocker | security | Wei-Chiu Chuang | Lisheng Sun |
| [HDFS-14959](https://issues.apache.org/jira/browse/HDFS-14959) | [SBNN read] access time should be turned off | Major | documentation | Wei-Chiu Chuang | Chao Sun |
| [HADOOP-16784](https://issues.apache.org/jira/browse/HADOOP-16784) | Update the year to 2020 | Major | . | Ayush Saxena | Ayush Saxena |
| [HADOOP-16803](https://issues.apache.org/jira/browse/HADOOP-16803) | Upgrade jackson-databind to 2.9.10.2 | Blocker | security | Akira Ajisaka | Masatake Iwasaki |
| [HADOOP-16871](https://issues.apache.org/jira/browse/HADOOP-16871) | Upgrade Netty version to 4.1.45.Final to handle CVE-2019-20444,CVE-2019-16869 | Major | . | Aray Chenchu Sukesh | Aray Chenchu Sukesh |
| [HADOOP-16647](https://issues.apache.org/jira/browse/HADOOP-16647) | Support OpenSSL 1.1.1 LTS | Critical | security | Wei-Chiu Chuang | Rakesh Radhakrishnan |
| [HADOOP-16982](https://issues.apache.org/jira/browse/HADOOP-16982) | Update Netty to 4.1.48.Final | Blocker | . | Wei-Chiu Chuang | Lisheng Sun |
| [HADOOP-16990](https://issues.apache.org/jira/browse/HADOOP-16990) | Update Mockserver | Major | . | Wei-Chiu Chuang | Attila Doroszlai |
| [YARN-10540](https://issues.apache.org/jira/browse/YARN-10540) | Node page is broken in YARN UI1 and UI2 including RMWebService api for nodes | Critical | webapp | Sunil G | Jim Brennan |
| [HADOOP-17445](https://issues.apache.org/jira/browse/HADOOP-17445) | Update the year to 2021 | Major | . | Xiaoqiao He | Xiaoqiao He |

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# Apache Hadoop 3.2.2 Release Notes
These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
---
* [HADOOP-16460](https://issues.apache.org/jira/browse/HADOOP-16460) | *Major* | **ABFS: fix for Sever Name Indication (SNI)**
ABFS: Bug fix to support Server Name Indication (SNI).
---
* [HDFS-14890](https://issues.apache.org/jira/browse/HDFS-14890) | *Blocker* | **Setting permissions on name directory fails on non posix compliant filesystems**
- Fixed namenode/journal startup on Windows.
---
* [HDFS-14905](https://issues.apache.org/jira/browse/HDFS-14905) | *Major* | **Backport HDFS persistent memory read cache support to branch-3.2**
Non-volatile storage class memory (SCM, also known as persistent memory) is supported in HDFS cache. To enable SCM cache, user just needs to configure SCM volume for property “dfs.datanode.cache.pmem.dirs” in hdfs-site.xml. And all HDFS cache directives keep unchanged. There are two implementations for HDFS SCM Cache, one is pure java code implementation and the other is native PMDK based implementation. The latter implementation can bring user better performance gain in cache write and cache read. If PMDK native libs could be loaded, it will use PMDK based implementation otherwise it will fallback to java code implementation. To enable PMDK based implementation, user should install PMDK library by referring to the official site http://pmem.io/. Then, build Hadoop with PMDK support by referring to "PMDK library build options" section in \`BUILDING.txt\` in the source code. If multiple SCM volumes are configured, a round-robin policy is used to select an available volume for caching a block. Consistent with DRAM cache, SCM cache also has no cache eviction mechanism. When DataNode receives a data read request from a client, if the corresponding block is cached into SCM, DataNode will instantiate an InputStream with the block location path on SCM (pure java implementation) or cache address on SCM (PMDK based implementation). Once the InputStream is created, DataNode will send the cached data to the client. Please refer "Centralized Cache Management" guide for more details.
---
* [HDFS-12943](https://issues.apache.org/jira/browse/HDFS-12943) | *Major* | **Consistent Reads from Standby Node**
Observer is a new type of a NameNode in addition to Active and Standby Nodes in HA settings. An Observer Node maintains a replica of the namespace same as a Standby Node. It additionally allows execution of clients read requests.
To ensure read-after-write consistency within a single client, a state ID is introduced in RPC headers. The Observer responds to the client request only after its own state has caught up with the client’s state ID, which it previously received from the Active NameNode.
Clients can explicitly invoke a new client protocol call msync(), which ensures that subsequent reads by this client from an Observer are consistent.
A new client-side ObserverReadProxyProvider is introduced to provide automatic switching between Active and Observer NameNodes for submitting respectively write and read requests.
---
* [HADOOP-16771](https://issues.apache.org/jira/browse/HADOOP-16771) | *Major* | **Update checkstyle to 8.26 and maven-checkstyle-plugin to 3.1.0**
Updated checkstyle to 8.26 and updated maven-checkstyle-plugin to 3.1.0.
---
* [HDFS-15281](https://issues.apache.org/jira/browse/HDFS-15281) | *Major* | **ZKFC ignores dfs.namenode.rpc-bind-host and uses dfs.namenode.rpc-address to bind to host address**
ZKFC binds host address to "dfs.namenode.servicerpc-bind-host", if configured. Otherwise, it binds to "dfs.namenode.rpc-bind-host". If neither of those is configured, ZKFC binds itself to NameNode RPC server address (effectively "dfs.namenode.rpc-address").
---
* [HADOOP-17024](https://issues.apache.org/jira/browse/HADOOP-17024) | *Major* | **ListStatus on ViewFS root (ls "/") should list the linkFallBack root (configured target root).**
ViewFS#listStatus on root("/") considers listing from fallbackLink if available. If the same directory name is present in configured mount path as well as in fallback link, then only the configured mount path will be listed in the returned result.
---
* [YARN-9809](https://issues.apache.org/jira/browse/YARN-9809) | *Major* | **NMs should supply a health status when registering with RM**
Improved node registration with node health status.

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<activeByDefault>false</activeByDefault>
</activation>
<properties>
<jdiff.stable.api>3.2.1</jdiff.stable.api>
<jdiff.stable.api>3.2.2</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 -->

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