| HDFS-12857 | StoragePolicyAdmin should support schema based path | Major | namenode | Surendra Singh Lilhore | Surendra Singh Lilhore | 
| YARN-7835 | [Atsv2] Race condition in NM while publishing events if second attempt is launched on the same node | Critical | . | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-7773 | YARN Federation used Mysql as state store throw exception, Unknown column ‘homeSubCluster’ in ‘field list’ | Blocker | federation | Yiran Wu | Yiran Wu | 
| HDFS-13636 | Cross-Site Scripting vulnerability in HttpServer2 | Major | . | Haibo Yan | Haibo Yan | 
| HDFS-13339 | Volume reference can’t be released and may lead to deadlock when DataXceiver does a check volume | Critical | datanode | liaoyuxiangqin | Zsolt Venczel | 
| YARN-8382 | cgroup file leak in NM | Major | nodemanager | Hu Ziqian | Hu Ziqian | 
| HDFS-13545 | “guarded” is misspelled as “gaurded” in FSPermissionChecker.java | Trivial | documentation | Jianchao Jia | Jianchao Jia | 
| MAPREDUCE-7103 | Fix TestHistoryViewerPrinter on windows due to a mismatch line separator | Minor | . | Giovanni Matteo Fumarola | Giovanni Matteo Fumarola | 
| HADOOP-15217 | FsUrlConnection does not handle paths with spaces | Major | fs | Joseph Fourny | Zsolt Venczel | 
| HDFS-12950 | [oiv] ls will fail in  secure cluster | Major | . | Brahma Reddy Battula | Wei-Chiu Chuang | 
| YARN-8359 | Exclude containermanager.linux test classes on Windows | Major | . | Giovanni Matteo Fumarola | Jason Lowe | 
| HDFS-13664 | Refactor ConfiguredFailoverProxyProvider to make inheritance easier | Minor | hdfs-client | Chao Sun | Chao Sun | 
| HDFS-12670 | can’t renew HDFS tokens with only the hdfs client jar | Critical | . | Thomas Graves | Arpit Agarwal | 
| HDFS-13667 | Typo: Marking all “datandoes” as stale | Trivial | namenode | Wei-Chiu Chuang | Nanda kumar | 
| YARN-8405 | RM zk-state-store.parent-path ACLs has been changed since HADOOP-14773 | Major | . | Rohith Sharma K S | Íñigo Goiri | 
| YARN-8404 | Timeline event publish need to be async to avoid Dispatcher thread leak in case ATS is down | Blocker | . | Rohith Sharma K S | Rohith Sharma K S | 
| HDFS-13673 | TestNameNodeMetrics fails on Windows | Minor | test | Zuoming Zhang | Zuoming Zhang | 
| HDFS-13676 | TestEditLogRace fails on Windows | Minor | test | Zuoming Zhang | Zuoming Zhang | 
| HDFS-13174 | hdfs mover -p /path times out after 20 min | Major | balancer & mover | Istvan Fajth | Istvan Fajth | 
| HADOOP-15523 | Shell command timeout given is in seconds whereas it is taken as millisec while scheduling | Major | . | Bilwa S T | Bilwa S T | 
| HDFS-13682 | Cannot create encryption zone after KMS auth token expires | Critical | encryption, kms, namenode | Xiao Chen | Xiao Chen | 
| YARN-8444 | NodeResourceMonitor crashes on bad swapFree value | Major | . | Jim Brennan | Jim Brennan | 
| YARN-8443 | Total #VCores in cluster metrics is wrong when CapacityScheduler reserved some containers | Major | webapp | Tao Yang | Tao Yang | 
| YARN-8457 | Compilation is broken with -Pyarn-ui | Major | webapp | Sunil Govindan | Sunil Govindan | 
| YARN-8401 | [UI2] new ui is not accessible with out internet connection | Blocker | . | Bibin A Chundatt | Bibin A Chundatt | 
| YARN-8451 | Multiple NM heartbeat thread created when a slow NM resync with RM | Major | nodemanager | Botong Huang | Botong Huang | 
| HADOOP-15548 | Randomize local dirs | Minor | . | Jim Brennan | Jim Brennan | 
| HDFS-13702 | Remove HTrace hooks from DFSClient to reduce CPU usage | Major | performance | Todd Lipcon | Todd Lipcon | 
| HDFS-13635 | Incorrect message when block is not found | Major | datanode | Wei-Chiu Chuang | Gabor Bota | 
| HADOOP-15571 | Multiple FileContexts created with the same configuration object should be allowed to have different umask | Critical | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli | 
| HDFS-13121 | NPE when request file descriptors when SC read | Minor | hdfs-client | Gang Xie | Zsolt Venczel | 
| YARN-6265 | yarn.resourcemanager.fail-fast is used inconsistently | Major | resourcemanager | Daniel Templeton | Yuanbo Liu | 
| YARN-8473 | Containers being launched as app tears down can leave containers in NEW state | Major | nodemanager | Jason Lowe | Jason Lowe | 
| HDFS-13723 | Occasional “Should be different group” error in TestRefreshUserMappings#testGroupMappingRefresh | Major | security, test | Siyao Meng | Siyao Meng | 
| HDFS-12837 | Intermittent failure in TestReencryptionWithKMS | Major | encryption, test | Surendra Singh Lilhore | Xiao Chen | 
| HDFS-13729 | Fix broken links to RBF documentation | Minor | documentation | jwhitter | Gabor Bota | 
| YARN-8515 | container-executor can crash with SIGPIPE after nodemanager restart | Major | . | Jim Brennan | Jim Brennan | 
| YARN-8421 | when moving app, activeUsers is increased, even though app does not have outstanding request | Major | . | kyungwan nam |  | 
| HDFS-13524 | Occasional “All datanodes are bad” error in TestLargeBlock#testLargeBlockSize | Major | . | Wei-Chiu Chuang | Siyao Meng | 
| HADOOP-15610 | Hadoop Docker Image Pip Install Fails | Critical | . | Jack Bearden | Jack Bearden | 
| HADOOP-15614 | TestGroupsCaching.testExceptionOnBackgroundRefreshHandled reliably fails | Major | . | Kihwal Lee | Weiwei Yang | 
| YARN-8548 | AllocationRespose proto setNMToken initBuilder not done | Major | . | Bibin A Chundatt | Bilwa S T | 
| YARN-7748 | TestContainerResizing.testIncreaseContainerUnreservedWhenApplicationCompleted fails due to multiple container fail events | Major | capacityscheduler | Haibo Chen | Weiwei Yang | 
| YARN-8577 | Fix the broken anchor in SLS site-doc | Minor | documentation | Weiwei Yang | Weiwei Yang | 
| YARN-4606 | CapacityScheduler: applications could get starved because computation of #activeUsers considers pending apps | Critical | capacity scheduler, capacityscheduler | Karam Singh | Manikandan R | 
| HDFS-13765 | Fix javadoc for FSDirMkdirOp#createParentDirectories | Minor | documentation | Lokesh Jain | Lokesh Jain | 
| YARN-8434 | Update federation documentation of Nodemanager configurations | Minor | . | Bibin A Chundatt | Bibin A Chundatt | 
| YARN-8558 | NM recovery level db not cleaned up properly on container finish | Critical | . | Bibin A Chundatt | Bibin A Chundatt | 
| HADOOP-15637 | LocalFs#listLocatedStatus does not filter out hidden .crc files | Minor | fs | Erik Krogen | Erik Krogen | 
| YARN-8397 | Potential thread leak in ActivitiesManager | Major | . | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-6966 | NodeManager metrics may return wrong negative values when NM restart | Major | . | Yang Wang | Szilard Nemeth | 
| HDFS-13786 | EC: Display erasure coding policy for sub-directories is not working | Major | erasure-coding | Souryakanta Dwivedy | Ayush Saxena | 
| YARN-8331 | Race condition in NM container launched after done | Major | . | Yang Wang | Pradeep Ambati | 
| HADOOP-15638 | KMS Accept Queue Size default changed from 500 to 128 in Hadoop 3.x | Major | kms | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| HDFS-13738 | fsck -list-corruptfileblocks has infinite loop if user is not privileged. | Major | tools | Wei-Chiu Chuang | Yuen-Kuei Hsueh | 
| HDFS-13758 | DatanodeManager should throw exception if it has BlockRecoveryCommand but the block is not under construction | Major | namenode | Wei-Chiu Chuang | chencan | 
| YARN-8614 | Fix few annotation typos in YarnConfiguration | Trivial | . | Sen Zhao | Sen Zhao | 
| HDFS-13746 | Still occasional “Should be different group” failure in TestRefreshUserMappings#testGroupMappingRefresh | Major | . | Siyao Meng | Siyao Meng | 
| HDFS-10240 | Race between close/recoverLease leads to missing block | Major | . | zhouyingchao | Jinglun | 
| YARN-8612 | Fix NM Collector Service Port issue in YarnConfiguration | Major | ATSv2 | Prabha Manepalli | Prabha Manepalli | 
| HDFS-13747 | Statistic for list_located_status is incremented incorrectly by listStatusIterator | Minor | hdfs-client | Todd Lipcon | Antal Mihalyi | 
| HADOOP-15674 | Test failure TestSSLHttpServer.testExcludedCiphers with TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 cipher suite | Major | common | Gabor Bota | Szilard Nemeth | 
| YARN-8640 | Restore previous state in container-executor after failure | Major | . | Jim Brennan | Jim Brennan | 
| YARN-8679 | [ATSv2] If HBase cluster is down for long time, high chances that NM ContainerManager dispatcher get blocked | Major | . | Rohith Sharma K S | Wangda Tan | 
| HADOOP-14314 | The OpenSolaris taxonomy link is dead in InterfaceClassification.md | Major | documentation | Daniel Templeton | Rui Gao | 
| YARN-8649 | NPE in localizer hearbeat processing if a container is killed while localizing | Major | . | lujie | lujie | 
| YARN-8719 | Typo correction for yarn configuration in OpportunisticContainers(federation) docs | Major | documentation, federation | Y. SREENIVASULU REDDY | Y. SREENIVASULU REDDY | 
| HDFS-13731 | ReencryptionUpdater fails with ConcurrentModificationException during processCheckpoints | Major | encryption | Xiao Chen | Zsolt Venczel | 
| HADOOP-15705 | Typo in the definition of “stable” in the interface classification | Minor | . | Daniel Templeton | Daniel Templeton | 
| HDFS-13863 | FsDatasetImpl should log DiskOutOfSpaceException | Major | hdfs | Fei Hui | Fei Hui | 
| HADOOP-15698 | KMS log4j is not initialized properly at startup | Major | kms | Kitti Nanasi | Kitti Nanasi | 
| HADOOP-15706 | Typo in compatibility doc: SHOUD -> SHOULD | Trivial | . | Daniel Templeton | Laszlo Kollar | 
| HDFS-13027 | Handle possible NPEs due to deleted blocks in race condition | Major | namenode | Vinayakumar B | Vinayakumar B |