| YARN-8040 | [UI2] New YARN UI webapp does not respect current pathname for REST api | Major | yarn-ui-v2 | Sunil Govindan | Sunil Govindan | 
| HADOOP-15062 | TestCryptoStreamsWithOpensslAesCtrCryptoCodec fails on Debian 9 | Major | . | Miklos Szegedi | Miklos Szegedi | 
| HDFS-11043 | TestWebHdfsTimeouts fails | Major | webhdfs | Andrew Wang | Chao Sun | 
| HADOOP-15331 | Fix a race condition causing parsing error of java.io.BufferedInputStream in class org.apache.hadoop.conf.Configuration | Major | common | Miklos Szegedi | Miklos Szegedi | 
| HDFS-11900 | Hedged reads thread pool creation not synchronized | Major | hdfs-client | John Zhuge | John Zhuge | 
| YARN-8032 | Yarn service should expose failuresValidityInterval to users and use it for launching containers | Major | . | Chandni Singh | Chandni Singh | 
| YARN-8043 | Add the exception message for failed launches running under LCE | Major | . | Shane Kumpf | Shane Kumpf | 
| YARN-7734 | YARN-5418 breaks TestContainerLogsPage.testContainerLogPageAccess | Major | . | Miklos Szegedi | Tao Yang | 
| HDFS-13087 | Snapshotted encryption zone information should be immutable | Major | encryption | LiXin Ge | LiXin Ge | 
| HADOOP-12862 | LDAP Group Mapping over SSL can not specify trust store | Major | . | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| HADOOP-15317 | Improve NetworkTopology chooseRandom’s loop | Major | . | Xiao Chen | Xiao Chen | 
| HADOOP-15355 | TestCommonConfigurationFields is broken by HADOOP-15312 | Major | test | Konstantin Shvachko | LiXin Ge | 
| YARN-7764 | Findbugs warning: Resource#getResources may expose internal representation | Major | api | Weiwei Yang | Weiwei Yang | 
| YARN-8106 | Update LogAggregationIndexedFileController to use readFull instead read to avoid IOException while loading log meta | Critical | log-aggregation | Prabhu Joseph | Prabhu Joseph | 
| YARN-8115 | [UI2] URL data like nodeHTTPAddress must be encoded in UI before using to access NM | Major | yarn-ui-v2 | Sunil Govindan | Sreenath Somarajapuram | 
| HDFS-13350 | Negative legacy block ID will confuse Erasure Coding to be considered as striped block | Major | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu | 
| YARN-8119 | [UI2] Timeline Server address’ url scheme should be removed while accessing via KNOX | Major | yarn-ui-v2 | Sunil Govindan | Sunil Govindan | 
| YARN-8083 | [UI2] All YARN related configurations are paged together in conf page | Major | yarn-ui-v2 | Zoltan Haindrich | Gergely Novák | 
| HADOOP-15366 | Add a helper shutdown routine in HadoopExecutor to ensure clean shutdown | Minor | . | Shashikant Banerjee | Shashikant Banerjee | 
| YARN-7905 | Parent directory permission incorrect during public localization | Critical | . | Bibin A Chundatt | Bilwa S T | 
| HADOOP-15374 | Add links of the new features of 3.1.0 to the top page | Major | documentation | Takanobu Asanuma | Takanobu Asanuma | 
| YARN-7804 | Refresh action on Grid view page should not be redirected to graph view | Major | yarn-ui-v2 | Yesha Vora | Gergely Novák | 
| HDFS-13420 | License header is displayed in ArchivalStorage/MemoryStorage html pages | Minor | documentation | Akira Ajisaka | Akira Ajisaka | 
| HDFS-13328 | Abstract ReencryptionHandler recursive logic in separate class. | Major | namenode | Surendra Singh Lilhore | Surendra Singh Lilhore | 
| HADOOP-15357 | Configuration.getPropsWithPrefix no longer does variable substitution | Major | . | Jim Brennan | Jim Brennan | 
| YARN-7984 | Delete registry entries from ZK on ServiceClient stop and clean up stop/destroy behavior | Critical | yarn-native-services | Billie Rinaldi | Billie Rinaldi | 
| YARN-8133 | Doc link broken for yarn-service from overview page. | Blocker | yarn-native-services | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-8116 | Nodemanager fails with NumberFormatException: For input string: "" | Critical | . | Yesha Vora | Chandni Singh | 
| MAPREDUCE-7062 | Update mapreduce.job.tags description for making use for ATSv2 purpose. | Major | . | Charan Hebri | Charan Hebri | 
| YARN-8073 | TimelineClientImpl doesn’t honor yarn.timeline-service.versions configuration | Major | . | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-8127 | Resource leak when async scheduling is enabled | Critical | . | Weiwei Yang | Tao Yang | 
| HDFS-13427 | Fix the section titles of transparent encryption document | Minor | documentation | Akira Ajisaka | Akira Ajisaka | 
| HDFS-7101 | Potential null dereference in DFSck#doWork() | Minor | . | Ted Yu | skrho | 
| HDFS-13426 | Fix javadoc in FsDatasetAsyncDiskService#removeVolume | Minor | hdfs | Shashikant Banerjee | Shashikant Banerjee | 
| YARN-8120 | JVM can crash with SIGSEGV when exiting due to custom leveldb logger | Major | nodemanager, resourcemanager | Jason Lowe | Jason Lowe | 
| YARN-8147 | TestClientRMService#testGetApplications sporadically fails | Major | test | Jason Lowe | Jason Lowe | 
| HDFS-13436 | Fix javadoc of package-info.java | Major | documentation | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-15379 | Make IrqHandler.bind() public | Minor | util | Steve Loughran | Ajay Kumar | 
| YARN-8154 | Fix missing titles in PlacementConstraints document | Minor | documentation | Akira Ajisaka | Weiwei Yang | 
| YARN-8153 | Guaranteed containers always stay in SCHEDULED on NM after restart | Major | . | Yang Wang | Yang Wang | 
| HADOOP-14970 | MiniHadoopClusterManager doesn’t respect lack of format option | Minor | . | Erik Krogen | Erik Krogen | 
| HDFS-13438 | Fix javadoc in FsVolumeList#removeVolume | Minor | . | Shashikant Banerjee | Shashikant Banerjee | 
| YARN-8142 | yarn service application stops when AM is killed with SIGTERM | Major | yarn-native-services | Yesha Vora | Billie Rinaldi | 
| MAPREDUCE-7077 | Pipe mapreduce job fails with Permission denied for jobTokenPassword | Critical | . | Yesha Vora | Akira Ajisaka | 
| HDFS-13330 | ShortCircuitCache#fetchOrCreate never retries | Major | . | Wei-Chiu Chuang | Gabor Bota | 
| YARN-8156 | Increase the default value of yarn.timeline-service.app-collector.linger-period.ms | Major | . | Rohith Sharma K S | Charan Hebri | 
| YARN-8165 | Incorrect queue name logging in AbstractContainerAllocator | Trivial | capacityscheduler | Weiwei Yang | Weiwei Yang | 
| HDFS-12828 | OIV ReverseXML Processor fails with escaped characters | Critical | hdfs | Erik Krogen | Erik Krogen | 
| HADOOP-15391 | Add missing css file in hadoop-aws, hadoop-aliyun, hadoop-azure and hadoop-azure-datalake modules | Major | documentation | Yiqun Lin | Yiqun Lin | 
| YARN-8171 | [UI2] AM Node link from attempt page should not redirect to new tab | Major | yarn-ui-v2 | Sunil Govindan | Sunil Govindan | 
| YARN-8145 | yarn rmadmin -getGroups doesn’t return updated groups for user | Major | . | Sumana Sathish | Sunil Govindan | 
| HDFS-13463 | Fix javadoc in FsDatasetImpl#checkAndUpdate | Minor | datanode | Shashikant Banerjee | Shashikant Banerjee | 
| HDFS-13464 | Fix javadoc in FsVolumeList#handleVolumeFailures | Minor | documentation | Shashikant Banerjee | Shashikant Banerjee | 
| HADOOP-15396 | Some java source files are executable | Minor | . | Akira Ajisaka | Shashikant Banerjee | 
| YARN-6827 | [ATS1/1.5] NPE exception while publishing recovering applications into ATS during RM restart. | Major | resourcemanager | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-8182 | [UI2] Proxy- Clicking on nodes under Nodes HeatMap gives 401 error | Critical | . | Sumana Sathish | Sunil Govindan | 
| YARN-8189 | [UI2] Nodes page column headers are half truncated | Major | . | Sunil Govindan | Sunil Govindan | 
| YARN-7830 | [UI2] Post selecting grid view in Attempt page, attempt info page should also be opened with grid view | Major | yarn-ui-v2 | Yesha Vora | Gergely Novák | 
| YARN-7786 | NullPointerException while launching ApplicationMaster | Major | . | lujie | lujie | 
| HDFS-10183 | Prevent race condition during class initialization | Minor | fs | Pavel Avgustinov | Pavel Avgustinov | 
| HDFS-13388 | RequestHedgingProxyProvider calls multiple configured NNs all the time | Major | hdfs-client | Jinglun | Jinglun | 
| YARN-7956 | [UI2] Avoid duplicating Components link under Services/<ServiceName>/Components | Major | yarn-ui-v2 | Yesha Vora | Yesha Vora | 
| HDFS-13433 | webhdfs requests can be routed incorrectly in federated cluster | Critical | webhdfs | Arpit Agarwal | Arpit Agarwal | 
| HDFS-13408 | MiniDFSCluster to support being built on randomized base directory | Major | test | Xiao Liang | Xiao Liang | 
| HDFS-13356 | Balancer:Set default value of minBlockSize to 10mb | Major | balancer & mover | Bharat Viswanadham | Bharat Viswanadham | 
| HADOOP-15390 | Yarn RM logs flooded by DelegationTokenRenewer trying to renew KMS tokens | Critical | . | Xiao Chen | Xiao Chen | 
| HDFS-13336 | Test cases of TestWriteToReplica failed in windows | Major | . | Xiao Liang | Xiao Liang | 
| YARN-8196 | yarn.webapp.api-service.enable should be highlighted in the quickstart | Trivial | documentation | Davide  Vergari | Billie Rinaldi | 
| YARN-8183 | Fix ConcurrentModificationException inside RMAppAttemptMetrics#convertAtomicLongMaptoLongMap | Critical | yarn | Sumana Sathish | Suma Shivaprasad | 
| YARN-8188 | RM Nodes UI data table index for sorting column need to be corrected post Application tags display | Major | resourcemanager, webapp | Weiwei Yang | Weiwei Yang | 
| HADOOP-15411 | AuthenticationFilter should use Configuration.getPropsWithPrefix instead of iterator | Critical | . | Suma Shivaprasad | Suma Shivaprasad | 
| MAPREDUCE-7042 | Killed MR job data does not move to mapreduce.jobhistory.done-dir when ATS v2 is enabled | Major | . | Yesha Vora | Xuan Gong | 
| YARN-8205 | Application State is not updated to ATS if AM launching is delayed. | Critical | . | Sumana Sathish | Rohith Sharma K S | 
| YARN-8004 | Add unit tests for inter queue preemption for dominant resource calculator | Critical | yarn | Sumana Sathish | Zian Chen | 
| YARN-8208 | Add log statement for Docker client configuration file at INFO level | Minor | yarn-native-services | Yesha Vora | Yesha Vora | 
| YARN-8211 | Yarn registry dns log finds BufferUnderflowException on port ping | Major | yarn-native-services | Yesha Vora | Eric Yang | 
| YARN-8221 | RMWebServices also need to honor yarn.resourcemanager.display.per-user-apps | Major | webapp | Sunil Govindan | Sunil Govindan | 
| YARN-8210 | AMRMClient logging on every heartbeat to track updation of AM RM token causes too many log lines to be generated in AM logs | Major | yarn | Suma Shivaprasad | Suma Shivaprasad | 
| YARN-8005 | Add unit tests for queue priority with dominant resource calculator | Critical | . | Sumana Sathish | Zian Chen | 
| YARN-8225 | YARN precommit build failing in TestPlacementConstraintTransformations | Critical | . | Billie Rinaldi | Shane Kumpf | 
| HDFS-13509 | Bug fix for breakHardlinks() of ReplicaInfo/LocalReplica, and fix TestFileAppend failures on Windows | Major | . | Xiao Liang | Xiao Liang | 
| YARN-8187 | [UI2] Individual Node page does not contain breadcrumb trail | Critical | yarn-ui-v2 | Sumana Sathish | Zian Chen | 
| YARN-7799 | YARN Service dependency follow up work | Critical | client, resourcemanager | Gour Saha | Billie Rinaldi | 
| MAPREDUCE-7073 | Optimize TokenCache#obtainTokensForNamenodesInternal | Major | . | Bibin A Chundatt | Bibin A Chundatt | 
| HADOOP-15406 | hadoop-nfs dependencies for mockito and junit are not test scope | Major | nfs | Jason Lowe | Jason Lowe | 
| YARN-6385 | Fix checkstyle warnings in TestFileSystemApplicationHistoryStore | Minor | . | Yiqun Lin | Yiqun Lin | 
| YARN-8222 | Fix potential NPE when gets RMApp from RM context | Critical | . | Tao Yang | Tao Yang | 
| YARN-8209 | NPE in DeletionService | Critical | . | Chandni Singh | Eric Badger | 
| HDFS-13481 | TestRollingFileSystemSinkWithHdfs#testFlushThread: test failed intermittently | Major | hdfs | Gabor Bota | Gabor Bota | 
| YARN-8217 | RmAuthenticationFilterInitializer /TimelineAuthenticationFilterInitializer should use Configuration.getPropsWithPrefix instead of iterator | Major | . | Suma Shivaprasad | Suma Shivaprasad | 
| YARN-7818 | Remove privileged operation warnings during container launch for the ContainerRuntimes | Major | . | Yesha Vora | Shane Kumpf | 
| YARN-8223 | ClassNotFoundException when auxiliary service is loaded from HDFS | Blocker | . | Charan Hebri | Zian Chen | 
| YARN-8079 | Support static and archive unmodified local resources in service AM | Critical | . | Wangda Tan | Suma Shivaprasad | 
| YARN-8025 | UsersManangers#getComputedResourceLimitForActiveUsers throws NPE due to preComputedActiveUserLimit is empty | Major | yarn | Jiandan Yang | Tao Yang | 
| YARN-8251 | [UI2] Clicking on Application link at the header goes to Diagnostics Tab instead of AppAttempt Tab | Major | yarn-ui-v2 | Sumana Sathish | Yesha Vora | 
| YARN-8232 | RMContainer lost queue name when RM HA happens | Major | resourcemanager | Hu Ziqian | Hu Ziqian | 
| YARN-7894 | Improve ATS response for DS_CONTAINER when container launch fails | Major | timelineserver | Charan Hebri | Chandni Singh | 
| YARN-8264 | [UI2 GPU] GPU Info tab disappears if we click any sub link under List of Applications or List of Containers | Major | . | Sumana Sathish | Sunil Govindan | 
| HDFS-13537 | TestHdfsHelper does not generate jceks path properly for relative path in Windows | Major | . | Xiao Liang | Xiao Liang | 
| YARN-8202 | DefaultAMSProcessor should properly check units of requested custom resource types against minimum/maximum allocation | Blocker | . | Szilard Nemeth | Szilard Nemeth | 
| HADOOP-15446 | WASB: PageBlobInputStream.skip breaks HBASE replication | Major | fs/azure | Thomas Marquardt | Thomas Marquardt | 
| YARN-7003 | DRAINING state of queues is not recovered after RM restart | Major | capacityscheduler | Tao Yang | Tao Yang | 
| YARN-8244 | TestContainerSchedulerQueuing.testStartMultipleContainers failed | Major | . | Miklos Szegedi | Jim Brennan | 
| YARN-8265 | Service AM should retrieve new IP for docker container relaunched by NM | Critical | yarn-native-services | Eric Yang | Billie Rinaldi | 
| YARN-8271 | [UI2] Improve labeling of certain tables | Major | yarn-ui-v2 | Yesha Vora | Yesha Vora | 
| YARN-8288 | Fix wrong number of table columns in Resource Model doc | Major | . | Weiwei Yang | Weiwei Yang | 
| HDFS-13539 | DFSStripedInputStream NPE when reportCheckSumFailure | Major | . | Xiao Chen | Xiao Chen | 
| YARN-8266 | [UI2] Clicking on application from cluster view should redirect to application attempt page | Major | yarn-ui-v2 | Yesha Vora | Yesha Vora | 
| YARN-8166 | [UI2] Service page header links are broken | Major | yarn-ui-v2 | Yesha Vora | Yesha Vora | 
| YARN-8236 | Invalid kerberos principal file name cause NPE in native service | Critical | yarn-native-services | Sunil Govindan | Gour Saha | 
| YARN-8278 | DistributedScheduling is not working in HA | Blocker | . | Bibin A Chundatt | Bibin A Chundatt | 
| HADOOP-15442 | ITestS3AMetrics.testMetricsRegister can’t know metrics source’s name | Major | fs/s3, metrics | Sean Mackrory | Sean Mackrory | 
| YARN-8300 | Fix NPE in DefaultUpgradeComponentsFinder | Major | yarn | Suma Shivaprasad | Suma Shivaprasad | 
| HDFS-13581 | DN UI logs link is broken when https is enabled | Minor | datanode | Namit Maheshwari | Shashikant Banerjee | 
| YARN-8128 | Document better the per-node per-app file limit in YARN log aggregation | Major | . | Xuan Gong | Xuan Gong | 
| YARN-8293 | In YARN Services UI, “User Name for service” should be completely removed in secure clusters | Major | yarn-ui-v2 | Sunil Govindan | Sunil Govindan | 
| YARN-8141 | YARN Native Service: Respect YARN_CONTAINER_RUNTIME_DOCKER_LOCAL_RESOURCE_MOUNTS specified in service spec | Critical | yarn-native-services | Wangda Tan | Chandni Singh | 
| YARN-8296 | Update YarnServiceApi documentation and yarn service UI code to remove references to unique_component_support | Major | yarn-native-services, yarn-ui-v2 | Suma Shivaprasad | Suma Shivaprasad | 
| HDFS-13586 | Fsync fails on directories on Windows | Critical | datanode, hdfs | Lukas Majercak | Lukas Majercak | 
| HADOOP-15478 | WASB: hflush() and hsync() regression | Major | fs/azure | Thomas Marquardt | Thomas Marquardt | 
| YARN-8179 | Preemption does not happen due to natural_termination_factor when DRF is used | Major | . | kyungwan nam | kyungwan nam | 
| HADOOP-15450 | Avoid fsync storm triggered by DiskChecker and handle disk full situation | Blocker | . | Kihwal Lee | Arpit Agarwal | 
| YARN-8290 | SystemMetricsPublisher.appACLsUpdated should be invoked after application information is published to ATS to avoid “User is not set in the application report” Exception | Critical | . | Yesha Vora | Eric Yang | 
| YARN-8332 | Incorrect min/max allocation property name in resource types doc | Critical | documentation | Weiwei Yang | Weiwei Yang | 
| HDFS-13601 | Optimize ByteString conversions in PBHelper | Major | . | Andrew Wang | Andrew Wang | 
| HDFS-13540 | DFSStripedInputStream should only allocate new buffers when reading | Major | . | Xiao Chen | Xiao Chen | 
| YARN-8297 | Incorrect ATS Url used for Wire encrypted cluster | Blocker | yarn-ui-v2 | Yesha Vora | Sunil Govindan | 
| HDFS-13588 | Fix TestFsDatasetImpl test failures on Windows | Major | . | Xiao Liang | Xiao Liang | 
| YARN-8310 | Handle old NMTokenIdentifier, AMRMTokenIdentifier, and ContainerTokenIdentifier formats | Major | . | Robert Kanter | Robert Kanter | 
| YARN-8344 | Missing nm.stop() in TestNodeManagerResync to fix testKillContainersOnResync | Major | . | Giovanni Matteo Fumarola | Giovanni Matteo Fumarola | 
| YARN-8327 | Fix TestAggregatedLogFormat#testReadAcontainerLogs1 on Windows | Major | log-aggregation | Giovanni Matteo Fumarola | Giovanni Matteo Fumarola | 
| HDFS-13611 | Unsafe use of Text as a ConcurrentHashMap key in PBHelperClient | Major | . | Andrew Wang | Andrew Wang | 
| YARN-8316 | Diagnostic message should improve when yarn service fails to launch due to ATS unavailability | Major | yarn-native-services | Yesha Vora | Billie Rinaldi | 
| YARN-8357 | Yarn Service: NPE when service is saved first and then started. | Critical | . | Chandni Singh | Chandni Singh | 
| HDFS-13618 | Fix TestDataNodeFaultInjector test failures on Windows | Major | test | Xiao Liang | Xiao Liang | 
| HADOOP-15473 | Configure serialFilter in KeyProvider to avoid UnrecoverableKeyException caused by JDK-8189997 | Critical | kms | Gabor Bota | Gabor Bota | 
| YARN-8292 | Fix the dominant resource preemption cannot happen when some of the resource vector becomes negative | Critical | yarn | Sumana Sathish | Wangda Tan | 
| YARN-8338 | TimelineService V1.5 doesn’t come up after HADOOP-15406 | Critical | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli | 
| YARN-8339 | Service AM should localize static/archive resource types to container working directory instead of ‘resources’ | Critical | yarn-native-services | Suma Shivaprasad | Suma Shivaprasad | 
| YARN-8369 | Javadoc build failed due to “bad use of ‘>’” | Critical | build, docs | Takanobu Asanuma | Takanobu Asanuma | 
| YARN-8362 | Number of remaining retries are updated twice after a container failure in NM | Critical | . | Chandni Singh | Chandni Singh | 
| YARN-8377 | Javadoc build failed in hadoop-yarn-server-nodemanager | Critical | build, docs | Takanobu Asanuma | Takanobu Asanuma | 
| YARN-8368 | yarn app start cli should print applicationId | Critical | . | Yesha Vora | Rohith Sharma K S | 
| YARN-8350 | NPE in service AM related to placement policy | Critical | yarn-native-services | Billie Rinaldi | Gour Saha | 
| YARN-8367 | Fix NPE in SingleConstraintAppPlacementAllocator when placement constraint in SchedulingRequest is null | Major | scheduler | Gour Saha | Weiwei Yang | 
| YARN-8197 | Tracking URL in the app state does not get redirected to MR ApplicationMaster for Running applications | Critical | yarn | Sumana Sathish | Sunil Govindan | 
| YARN-8308 | Yarn service app fails due to issues with Renew Token | Major | yarn-native-services | Yesha Vora | Gour Saha | 
| HDFS-13636 | Cross-Site Scripting vulnerability in HttpServer2 | Major | . | Haibo Yan | Haibo Yan | 
| YARN-7962 | Race Condition When Stopping DelegationTokenRenewer causes RM crash during failover | Critical | resourcemanager | BELUGA BEHR | BELUGA BEHR | 
| YARN-8372 | Distributed shell app master should not release containers when shutdown if keep-container is true | Critical | distributed-shell | Charan Hebri | Suma Shivaprasad | 
| YARN-8319 | More YARN pages need to honor yarn.resourcemanager.display.per-user-apps | Major | webapp | Vinod Kumar Vavilapalli | Sunil Govindan | 
| MAPREDUCE-7097 | MapReduce JHS should honor yarn.webapp.filter-entity-list-by-user | Major | . | Vinod Kumar Vavilapalli | Sunil Govindan | 
| YARN-8276 | [UI2] After version field became mandatory, form-based submission of new YARN service doesn’t work | Critical | yarn-ui-v2 | Gergely Novák | Gergely Novák | 
| 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 | 
| YARN-8365 | Revisit the record type used by Registry DNS for upstream resolution | Major | yarn-native-services | Shane Kumpf | Shane Kumpf | 
| HDFS-13545 | “guarded” is misspelled as “gaurded” in FSPermissionChecker.java | Trivial | documentation | Jianchao Jia | Jianchao Jia | 
| YARN-8396 | Click on an individual container continuously spins and doesn’t load the page | Blocker | . | Charan Hebri | Sunil Govindan | 
| 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-8386 | App log can not be viewed from Logs tab in secure cluster | Critical | yarn-ui-v2 | Yesha Vora | Sunil Govindan | 
| 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-8413 | Flow activity page is failing with “Timeline server failed with an error” | Major | yarn-ui-v2 | Yesha Vora | Sunil Govindan | 
| YARN-8405 | RM zk-state-store.parent-path ACLs has been changed since HADOOP-14773 | Major | . | Rohith Sharma K S | Íñigo Goiri | 
| YARN-8419 | [UI2] User cannot submit a new service as submit button is always disabled | Major | . | Suma Shivaprasad | Suma Shivaprasad | 
| MAPREDUCE-7108 | TestFileOutputCommitter fails on Windows | Minor | test | Zuoming Zhang | Zuoming Zhang | 
| MAPREDUCE-7101 | Add config parameter to allow JHS to alway scan user dir irrespective of modTime | Critical | . | Wangda Tan | Thomas Marquardt | 
| HADOOP-15527 | loop until TIMEOUT before sending kill -9 | Major | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli | 
| 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 | 
| YARN-8410 | Registry DNS lookup fails to return for CNAMEs | Major | yarn-native-services | Shane Kumpf | Shane Kumpf | 
| HDFS-13675 | Speed up TestDFSAdminWithHA | Major | hdfs, namenode | Lukas Majercak | Lukas Majercak | 
| 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-8445 | YARN native service doesn’t allow service name equals to component name | Major | . | Chandni Singh | Chandni Singh | 
| YARN-8444 | NodeResourceMonitor crashes on bad swapFree value | Major | . | Jim Brennan | Jim Brennan | 
| YARN-8326 | Yarn 3.0 seems runs slower than Yarn 2.6 | Major | yarn | Hsin-Liang Huang | Shane Kumpf | 
| 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-8464 | Async scheduling thread could be interrupted when there are no NodeManagers in cluster | Blocker | capacity scheduler | Charan Hebri | Sunil Govindan | 
| YARN-8423 | GPU does not get released even though the application gets killed. | Critical | yarn | Sumana Sathish | Sunil Govindan | 
| YARN-8401 | [UI2] new ui is not accessible with out internet connection | Blocker | . | Bibin A Chundatt | Bibin A Chundatt | 
| HDFS-13705 | The native ISA-L library loading failure should be made warning rather than an error message | Minor | erasure-coding | Nilotpal Nandi | Shashikant Banerjee | 
| YARN-8409 | ActiveStandbyElectorBasedElectorService is failing with NPE | Major | . | Yesha Vora | Chandni Singh | 
| YARN-8379 | Improve balancing resources in already satisfied queues by using Capacity Scheduler preemption | Major | . | Wangda Tan | Zian Chen | 
| YARN-8455 | Add basic ACL check for all ATS v2 REST APIs | Major | . | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-8469 | [UI2] URL needs to be trimmed to handle index.html redirection while accessing via knox | Major | yarn-ui-v2 | Sunil Govindan | Sunil Govindan | 
| 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 | 
| HADOOP-15574 | Suppress build error if there are no docs after excluding private annotations | Major | . | Takanobu Asanuma | Takanobu Asanuma | 
| 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 | 
| YARN-8415 | TimelineWebServices.getEntity should throw ForbiddenException instead of 404 when ACL checks fail | Major | . | Sumana Sathish | Suma Shivaprasad | 
| HDFS-13715 | diskbalancer does not work if one of the blockpools are empty on a Federated cluster | Major | diskbalancer | Namit Maheshwari | Bharat Viswanadham | 
| YARN-8459 | Improve Capacity Scheduler logs to debug invalid states | Major | capacity scheduler | Wangda Tan | Wangda Tan | 
| 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 | 
| YARN-8512 | ATSv2 entities are not published to HBase from second attempt onwards | Major | . | Yesha Vora | Rohith Sharma K S | 
| YARN-8491 | TestServiceCLI#testEnableFastLaunch fail when umask is 077 | Major | . | K G Bakthavachalam | K G Bakthavachalam | 
| HADOOP-15541 | AWS SDK can mistake stream timeouts for EOF and throw SdkClientExceptions | Major | fs/s3 | Sean Mackrory | Sean Mackrory | 
| 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-8518 | test-container-executor test_is_empty() is broken | Major | . | Jim Brennan | Jim Brennan | 
| 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 |  | 
| YARN-8511 | When AM releases a container, RM removes allocation tags before it is released by NM | Major | capacity scheduler | Weiwei Yang | Weiwei Yang | 
| HDFS-13524 | Occasional “All datanodes are bad” error in TestLargeBlock#testLargeBlockSize | Major | . | Wei-Chiu Chuang | Siyao Meng | 
| YARN-8538 | Fix valgrind leak check on container executor | Major | . | Billie Rinaldi | Billie Rinaldi | 
| HADOOP-15610 | Hadoop Docker Image Pip Install Fails | Critical | . | Jack Bearden | Jack Bearden | 
| HADOOP-15614 | TestGroupsCaching.testExceptionOnBackgroundRefreshHandled reliably fails | Major | . | Kihwal Lee | Weiwei Yang | 
| MAPREDUCE-7118 | Distributed cache conflicts breaks backwards compatability | Blocker | mrv2 | Jason Lowe | Jason Lowe | 
| YARN-8528 | Final states in ContainerAllocation might be modified externally causing unexpected allocation results | Major | capacity scheduler | Xintong Song | Xintong Song | 
| YARN-8541 | RM startup failure on recovery after user deletion | Blocker | resourcemanager | yimeng | Bibin A Chundatt | 
| HADOOP-15593 | UserGroupInformation TGT renewer throws NPE | Blocker | security | Wei-Chiu Chuang | Gabor Bota | 
| HDFS-13765 | Fix javadoc for FSDirMkdirOp#createParentDirectories | Minor | documentation | Lokesh Jain | Lokesh Jain | 
| YARN-8508 | On NodeManager container gets cleaned up before its pid file is created | Critical | . | Sumana Sathish | Chandni Singh | 
| YARN-8434 | Update federation documentation of Nodemanager configurations | Minor | . | Bibin A Chundatt | Bibin A Chundatt | 
| YARN-8591 | [ATSv2] NPE while checking for entity acl in non-secure cluster | Major | timelinereader, timelineserver | Akhil PB | Rohith Sharma K S | 
| YARN-8558 | NM recovery level db not cleaned up properly on container finish | Critical | . | Bibin A Chundatt | Bibin A Chundatt | 
| YARN-8418 | App local logs could leaked if log aggregation fails to initialize for the app | Critical | . | Bibin A Chundatt | Bibin A Chundatt | 
| YARN-8522 | Application fails with InvalidResourceRequestException | Critical | . | Yesha Vora | Zian Chen | 
| YARN-8606 | Opportunistic scheduling does not work post RM failover | Blocker | . | Bibin A Chundatt | Bibin A Chundatt | 
| YARN-8600 | RegistryDNS hang when remote lookup does not reply | Critical | yarn | Eric Yang | Eric Yang | 
| YARN-8603 | [UI2] Latest run application should be listed first in the RM UI | Major | yarn-ui-v2 | Sumana Sathish | Akhil PB | 
| YARN-8608 | [UI2] No information available per application appAttempt about ‘Total Outstanding Resource Requests’ | Major | yarn-ui-v2 | Sumana Sathish | Akhil PB | 
| YARN-8399 | NodeManager is giving 403 GSS exception post upgrade to 3.1 in secure mode | Major | timelineservice | Sunil Govindan | Sunil Govindan | 
| HDFS-13746 | Still occasional “Should be different group” failure in TestRefreshUserMappings#testGroupMappingRefresh | Major | . | Siyao Meng | Siyao Meng | 
| HADOOP-14314 | The OpenSolaris taxonomy link is dead in InterfaceClassification.md | Major | documentation | Daniel Templeton | Rui Gao |