| HDFS-12052 | Set SWEBHDFS delegation token kind when ssl is enabled in HttpFS | Major | httpfs, webhdfs | Zoran Dimitrijevic | Zoran Dimitrijevic | 
| HDFS-12318 | Fix IOException condition for openInfo in DFSInputStream | Major | . | legend | legend | 
| HDFS-12614 | FSPermissionChecker#getINodeAttrs() throws NPE when INodeAttributesProvider configured | Major | . | Manoj Govindassamy | Manoj Govindassamy | 
| YARN-7370 | Preemption properties should be refreshable | Major | capacity scheduler, scheduler preemption | Eric Payne | Gergely Novák | 
| YARN-7428 | Add containerId to Localizer failed logs | Minor | nodemanager | Prabhu Joseph | Prabhu Joseph | 
| HDFS-12783 | [branch-2] “dfsrouter” should use hdfsScript | Major | . | Brahma Reddy Battula | Brahma Reddy Battula | 
| HDFS-12788 | Reset the upload button when file upload fails | Critical | ui, webhdfs | Brahma Reddy Battula | Brahma Reddy Battula | 
| YARN-7469 | Capacity Scheduler Intra-queue preemption: User can starve if newest app is exactly at user limit | Major | capacity scheduler, yarn | Eric Payne | Eric Payne | 
| HADOOP-14982 | Clients using FailoverOnNetworkExceptionRetry can go into a loop if they’re used without authenticating with kerberos in HA env | Major | common | Peter Bacsko | Peter Bacsko | 
| YARN-7489 | ConcurrentModificationException in RMAppImpl#getRMAppMetrics | Major | capacityscheduler | Tao Yang | Tao Yang | 
| YARN-7525 | Incorrect query parameters in cluster nodes REST API document | Minor | documentation | Tao Yang | Tao Yang | 
| HDFS-12813 | RequestHedgingProxyProvider can hide Exception thrown from the Namenode for proxy size of 1 | Major | ha | Mukul Kumar Singh | Mukul Kumar Singh | 
| HADOOP-15045 | ISA-L build options are documented in branch-2 | Major | build, documentation | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-15067 | GC time percentage reported in JvmMetrics should be a gauge, not counter | Major | . | Misha Dmitriev | Misha Dmitriev | 
| YARN-7363 | ContainerLocalizer doesn’t have a valid log4j config when using LinuxContainerExecutor | Major | nodemanager | Yufei Gu | Yufei Gu | 
| HDFS-12754 | Lease renewal can hit a deadlock | Major | . | Kuhu Shukla | Kuhu Shukla | 
| HDFS-12832 | INode.getFullPathName may throw ArrayIndexOutOfBoundsException lead to NameNode exit | Critical | namenode | DENG FEI | Konstantin Shvachko | 
| HDFS-11754 | Make FsServerDefaults cache configurable. | Minor | . | Rushabh S Shah | Mikhail Erofeev | 
| HADOOP-15042 | Azure PageBlobInputStream.skip() can return negative value when numberOfPagesRemaining is 0 | Minor | fs/azure | Rajesh Balamohan | Rajesh Balamohan | 
| HDFS-12638 | Delete copy-on-truncate block along with the original block, when deleting a file being truncated | Blocker | hdfs | Jiandan Yang | Konstantin Shvachko | 
| YARN-4813 | TestRMWebServicesDelegationTokenAuthentication.testDoAs fails intermittently | Major | resourcemanager | Daniel Templeton | Gergo Repas | 
| MAPREDUCE-5124 | AM lacks flow control for task events | Major | mr-am | Jason Lowe | Peter Bacsko | 
| YARN-7455 | quote_and_append_arg can overflow buffer | Major | nodemanager | Jason Lowe | Jim Brennan | 
| YARN-5594 | Handle old RMDelegationToken format when recovering RM | Major | resourcemanager | Tatyana But | Robert Kanter | 
| HADOOP-14985 | Remove subversion related code from VersionInfoMojo.java | Minor | build | Akira Ajisaka | Ajay Kumar | 
| HDFS-11751 | DFSZKFailoverController daemon exits with wrong status code | Major | auto-failover | Doris Gu | Bharat Viswanadham | 
| HDFS-12889 | Router UI is missing robots.txt file | Major | . | Bharat Viswanadham | Bharat Viswanadham | 
| YARN-7607 | Remove the trailing duplicated timestamp in container diagnostics message | Minor | nodemanager | Weiwei Yang | Weiwei Yang | 
| HADOOP-15080 | Aliyun OSS: update oss sdk from 2.8.1 to 2.8.3 to remove its dependency on Cat-x “json-lib” | Blocker | fs/oss | Chris Douglas | Sammi Chen | 
| YARN-7608 | Incorrect sTarget column causing DataTable warning on RM application and scheduler web page | Major | resourcemanager, webapp | Weiwei Yang | Gergely Novák | 
| HDFS-12833 | Distcp : Update the usage of delete option for dependency with update and overwrite option | Minor | distcp, hdfs | Harshakiran Reddy | usharani | 
| YARN-7647 | NM print inappropriate error log when node-labels is enabled | Minor | . | Yang Wang | Yang Wang | 
| HDFS-12907 | Allow read-only access to reserved raw for non-superusers | Major | namenode | Daryn Sharp | Rushabh S Shah | 
| HDFS-12881 | Output streams closed with IOUtils suppressing write errors | Major | . | Jason Lowe | Ajay Kumar | 
| YARN-7595 | Container launching code suppresses close exceptions after writes | Major | nodemanager | Jason Lowe | Jim Brennan | 
| HADOOP-15085 | Output streams closed with IOUtils suppressing write errors | Major | . | Jason Lowe | Jim Brennan | 
| HADOOP-15123 | KDiag tries to load krb5.conf from KRB5CCNAME instead of KRB5_CONFIG | Minor | security | Vipin Rathor | Vipin Rathor | 
| YARN-7661 | NodeManager metrics return wrong value after update node resource | Major | . | Yang Wang | Yang Wang | 
| HDFS-12347 | TestBalancerRPCDelay#testBalancerRPCDelay fails very frequently | Critical | test | Xiao Chen | Bharat Viswanadham | 
| YARN-7662 | [Atsv2] Define new set of configurations for reader and collectors to bind. | Major | . | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-7674 | Update Timeline Reader web app address in UI2 | Major | . | Rohith Sharma K S | Sunil Govindan | 
| YARN-7542 | Fix issue that causes some Running Opportunistic Containers to be recovered as PAUSED | Major | . | Arun Suresh | Sampada Dehankar | 
| HADOOP-15143 | NPE due to Invalid KerberosTicket in UGI | Major | . | Jitendra Nath Pandey | Mukul Kumar Singh | 
| YARN-7692 | Skip validating priority acls while recovering applications | Blocker | resourcemanager | Charan Hebri | Sunil Govindan | 
| MAPREDUCE-7028 | Concurrent task progress updates causing NPE in Application Master | Blocker | mr-am | Gergo Repas | Gergo Repas | 
| YARN-7619 | Max AM Resource value in Capacity Scheduler UI has to be refreshed for every user | Major | capacity scheduler, yarn | Eric Payne | Eric Payne | 
| YARN-7699 | queueUsagePercentage is coming as INF for getApp REST api call | Major | webapp | Sunil Govindan | Sunil Govindan | 
| HDFS-12985 | NameNode crashes during restart after an OpenForWrite file present in the Snapshot got deleted | Major | hdfs | Manoj Govindassamy | Manoj Govindassamy | 
| YARN-4227 | Ignore expired containers from removed nodes in FairScheduler | Critical | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg | 
| YARN-7508 | NPE in FiCaSchedulerApp when debug log enabled in async-scheduling mode | Major | capacityscheduler | Tao Yang | Tao Yang | 
| YARN-7663 | RMAppImpl:Invalid event: START at KILLED | Major | resourcemanager | lujie | lujie | 
| YARN-6948 | Invalid event: ATTEMPT_ADDED at FINAL_SAVING | Major | yarn | lujie | lujie | 
| HADOOP-15060 | TestShellBasedUnixGroupsMapping.testFiniteGroupResolutionTime flaky | Major | . | Miklos Szegedi | Miklos Szegedi | 
| YARN-7735 | Fix typo in YARN documentation | Minor | documentation | Takanobu Asanuma | Takanobu Asanuma | 
| YARN-7727 | Incorrect log levels in few logs with QueuePriorityContainerCandidateSelector | Minor | yarn | Prabhu Joseph | Prabhu Joseph | 
| HDFS-11915 | Sync rbw dir on the first hsync() to avoid file lost on power failure | Critical | . | Kanaka Kumar Avvaru | Vinayakumar B | 
| YARN-7705 | Create the container log directory with correct sticky bit in C code | Major | nodemanager | Yufei Gu | Yufei Gu | 
| HDFS-9049 | Make Datanode Netty reverse proxy port to be configurable | Major | datanode | Vinayakumar B | Vinayakumar B | 
| YARN-7758 | Add an additional check to the validity of container and application ids passed to container-executor | Major | nodemanager | Miklos Szegedi | Yufei Gu | 
| HADOOP-15150 | in FsShell, UGI params should be overidden through env vars(-D arg) | Major | . | Brahma Reddy Battula | Brahma Reddy Battula | 
| HADOOP-15181 | Typo in SecureMode.md | Trivial | documentation | Masahiro Tanaka | Masahiro Tanaka | 
| YARN-7806 | Distributed Shell should use timeline async api’s | Major | distributed-shell | Sumana Sathish | Rohith Sharma K S | 
| HADOOP-15121 | Encounter NullPointerException when using DecayRpcScheduler | Major | . | Tao Jie | Tao Jie | 
| MAPREDUCE-7015 | Possible race condition in JHS if the job is not loaded | Major | jobhistoryserver | Peter Bacsko | Peter Bacsko | 
| YARN-7737 | prelaunch.err file not found exception on container failure | Major | . | Jonathan Hung | Keqiu Hu | 
| HDFS-13063 | Fix the incorrect spelling in HDFSHighAvailabilityWithQJM.md | Trivial | documentation | Jianfei Jiang | Jianfei Jiang | 
| YARN-7102 | NM heartbeat stuck when responseId overflows MAX_INT | Critical | . | Botong Huang | Botong Huang | 
| MAPREDUCE-7041 | MR should not try to clean up at first job attempt | Major | . | Takanobu Asanuma | Gergo Repas | 
| MAPREDUCE-7020 | Task timeout in uber mode can crash AM | Major | mr-am | Akira Ajisaka | Peter Bacsko | 
| YARN-7765 | [Atsv2] GSSException: No valid credentials provided - Failed to find any Kerberos tgt thrown by Timelinev2Client & HBaseClient in NM | Blocker | . | Sumana Sathish | Rohith Sharma K S | 
| HDFS-12974 | Exception message is not printed when creating an encryption zone fails with AuthorizationException | Minor | encryption | fang zhenyi | fang zhenyi | 
| YARN-7698 | A misleading variable’s name in ApplicationAttemptEventDispatcher | Minor | resourcemanager | Jinjiang Ling | Jinjiang Ling | 
| HDFS-12528 | Add an option to not disable short-circuit reads on failures | Major | hdfs-client, performance | Andre Araujo | Xiao Chen | 
| HDFS-13100 | Handle IllegalArgumentException when GETSERVERDEFAULTS is not implemented in webhdfs. | Critical | hdfs, webhdfs | Yongjun Zhang | Yongjun Zhang | 
| YARN-7849 | TestMiniYarnClusterNodeUtilization#testUpdateNodeUtilization fails due to heartbeat sync error | Major | test | Jason Lowe | Botong Huang | 
| YARN-7801 | AmFilterInitializer should addFilter after fill all parameters | Critical | . | Sumana Sathish | Wangda Tan | 
| YARN-7890 | NPE during container relaunch | Major | . | Billie Rinaldi | Jason Lowe | 
| HDFS-13115 | In getNumUnderConstructionBlocks(), ignore the inodeIds for which the inodes have been deleted | Major | . | Yongjun Zhang | Yongjun Zhang | 
| HDFS-12935 | Get ambiguous result for DFSAdmin command in HA mode when only one namenode is up | Major | tools | Jianfei Jiang | Jianfei Jiang | 
| HDFS-13120 | Snapshot diff could be corrupted after concat | Major | namenode, snapshots | Xiaoyu Yao | Xiaoyu Yao | 
| HDFS-10453 | ReplicationMonitor thread could stuck for long time due to the race between replication and delete of same file in a large cluster. | Major | namenode | He Xiaoqiao | He Xiaoqiao | 
| HDFS-8693 | refreshNamenodes does not support adding a new standby to a running DN | Critical | datanode, ha | Jian Fang | Ajith S | 
| MAPREDUCE-7052 | TestFixedLengthInputFormat#testFormatCompressedIn is flaky | Major | client, test | Peter Bacsko | Peter Bacsko | 
| HDFS-13112 | Token expiration edits may cause log corruption or deadlock | Critical | namenode | Daryn Sharp | Daryn Sharp | 
| MAPREDUCE-7053 | Timed out tasks can fail to produce thread dump | Major | . | Jason Lowe | Jason Lowe | 
| HADOOP-15206 | BZip2 drops and duplicates records when input split size is small | Major | . | Aki Tanaka | Aki Tanaka | 
| YARN-7937 | Fix http method name in Cluster Application Timeout Update API example request | Minor | docs, documentation | Charan Hebri | Charan Hebri | 
| YARN-7947 | Capacity Scheduler intra-queue preemption can NPE for non-schedulable apps | Major | capacity scheduler, scheduler preemption | Eric Payne | Eric Payne | 
| YARN-7945 | Java Doc error in UnmanagedAMPoolManager for branch-2 | Major | . | Rohith Sharma K S | Botong Huang | 
| HADOOP-14903 | Add json-smart explicitly to pom.xml | Major | common | Ray Chiang | Ray Chiang | 
| HADOOP-15236 | Fix typo in RequestHedgingProxyProvider and RequestHedgingRMFailoverProxyProvider | Trivial | documentation | Akira Ajisaka | Gabor Bota | 
| MAPREDUCE-7027 | HadoopArchiveLogs shouldn’t delete the original logs if the HAR creation fails | Critical | mrv2 | Gergely Novák | Gergely Novák | 
| HDFS-12781 | After Datanode down, In Namenode UI Datanode tab is throwing warning message. | Major | datanode | Harshakiran Reddy | Brahma Reddy Battula | 
| HDFS-12070 | Failed block recovery leaves files open indefinitely and at risk for data loss | Major | . | Daryn Sharp | Kihwal Lee | 
| HADOOP-15251 | Backport HADOOP-13514 (surefire upgrade) to branch-2 | Major | test | Chris Douglas | Chris Douglas | 
| HDFS-13194 | CachePool permissions incorrectly checked | Major | . | Yiqun Lin | Jianfei Jiang | 
| HADOOP-15276 | branch-2 site not building after ADL troubleshooting doc added | Major | documentation | Steve Loughran | Steve Loughran | 
| 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 | 
| HADOOP-15275 | Incorrect javadoc for return type of RetryPolicy#shouldRetry | Minor | documentation | Nanda kumar | Nanda kumar | 
| YARN-7511 | NPE in ContainerLocalizer when localization failed for running container | Major | nodemanager | Tao Yang | Tao Yang | 
| MAPREDUCE-7023 | TestHadoopArchiveLogs.testCheckFilesAndSeedApps fails on rerun | Minor | test | Gergely Novák | Gergely Novák | 
| HADOOP-15283 | Upgrade from findbugs 3.0.1 to spotbugs 3.1.2 in branch-2 to fix docker image build | Major | . | Xiao Chen | Akira Ajisaka | 
| HADOOP-15286 | Remove unused imports from TestKMSWithZK.java | Minor | test | Akira Ajisaka | Ajay Kumar | 
| HDFS-13040 | Kerberized inotify client fails despite kinit properly | Major | namenode | Wei-Chiu Chuang | Xiao Chen | 
| YARN-7736 | Fix itemization in YARN federation document | Minor | documentation | Akira Ajisaka | Sen Zhao | 
| HDFS-13164 | File not closed if streamer fail with DSQuotaExceededException | Major | hdfs-client | Xiao Chen | Xiao Chen | 
| HDFS-13109 | Support fully qualified hdfs path in EZ commands | Major | hdfs | Hanisha Koneru | Hanisha Koneru | 
| MAPREDUCE-6930 | mapreduce.map.cpu.vcores and mapreduce.reduce.cpu.vcores are both present twice in mapred-default.xml | Major | mrv2 | Daniel Templeton | Sen Zhao | 
| HDFS-10618 | TestPendingReconstruction#testPendingAndInvalidate is flaky due to race condition | Major | . | Eric Badger | Eric Badger | 
| HDFS-10803 | TestBalancerWithMultipleNameNodes#testBalancing2OutOf3Blockpools fails intermittently due to no free space available | Major | . | Yiqun Lin | Yiqun Lin | 
| HDFS-12156 | TestFSImage fails without -Pnative | Major | test | Akira Ajisaka | Akira Ajisaka | 
| HDFS-13261 | Fix incorrect null value check | Minor | hdfs | Jianfei Jiang | Jianfei Jiang | 
| HDFS-12886 | Ignore minReplication for block recovery | Major | hdfs, namenode | Lukas Majercak | Lukas Majercak | 
| YARN-8039 | Clean up log dir configuration in TestLinuxContainerExecutorWithMocks.testStartLocalizer | Minor | . | Miklos Szegedi | Miklos Szegedi | 
| HDFS-13296 | GenericTestUtils generates paths with drive letter in Windows and fail webhdfs related test cases | Major | . | Xiao Liang | Xiao Liang | 
| HDFS-13268 | TestWebHdfsFileContextMainOperations fails on Windows | Major | . | Íñigo Goiri | Xiao Liang | 
| YARN-8054 | Improve robustness of the LocalDirsHandlerService MonitoringTimerTask thread | Major | . | Jonathan Eagles | Jonathan Eagles | 
| YARN-7873 | Revert YARN-6078 | Blocker | . | Billie Rinaldi | Billie Rinaldi | 
| HDFS-13195 | DataNode conf page  cannot display the current value after reconfig | Minor | datanode | maobaolong | maobaolong | 
| YARN-8063 | DistributedShellTimelinePlugin wrongly check for entityId instead of entityType | Major | . | Rohith Sharma K S | Rohith Sharma K S | 
| YARN-8068 | Application Priority field causes NPE in app timeline publish when Hadoop 2.7 based clients to 2.8+ | Blocker | yarn | Sunil Govindan | Sunil Govindan | 
| 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 | 
| HDFS-13176 | WebHdfs file path gets truncated when having semicolon (;) inside | Major | webhdfs | Zsolt Venczel | Zsolt Venczel | 
| HADOOP-15375 | Branch-2 pre-commit failed to build docker image | Major | . | Xiao Chen | Xiao Chen | 
| HADOOP-15357 | Configuration.getPropsWithPrefix no longer does variable substitution | Major | . | Jim Brennan | Jim Brennan | 
| 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-6629 | NPE occurred when container allocation proposal is applied but its resource requests are removed before | Critical | . | Tao Yang | Tao Yang | 
| HDFS-13427 | Fix the section titles of transparent encryption document | Minor | documentation | Akira Ajisaka | Akira Ajisaka | 
| YARN-7527 | Over-allocate node resource in async-scheduling mode of CapacityScheduler | Major | capacityscheduler | Tao Yang | Tao Yang | 
| HDFS-7101 | Potential null dereference in DFSck#doWork() | Minor | . | Ted Yu | skrho | 
| 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 | 
| HADOOP-14970 | MiniHadoopClusterManager doesn’t respect lack of format option | Minor | . | Erik Krogen | Erik Krogen | 
| 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 | 
| YARN-8164 | Fix a potential NPE in AbstractSchedulerPlanFollower | Major | . | lujie | lujie | 
| HDFS-12828 | OIV ReverseXML Processor fails with escaped characters | Critical | hdfs | Erik Krogen | Erik Krogen | 
| HADOOP-15180 | branch-2 : daemon processes’ sysout overwrites ‘ulimit -a’ in daemon’s out file | Minor | scripts | Ranith Sardar | Ranith Sardar | 
| 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-7786 | NullPointerException while launching ApplicationMaster | Major | . | lujie | lujie | 
| HDFS-13408 | MiniDFSCluster to support being built on randomized base directory | Major | test | Xiao Liang | Xiao Liang | 
| 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-7598 | Document how to use classpath isolation for aux-services in YARN | Major | . | Xuan Gong | Xuan Gong | 
| HADOOP-15385 | Many tests are failing in hadoop-distcp project in branch-2 | Critical | tools/distcp | Rushabh S Shah | Jason Lowe | 
| 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 | 
| MAPREDUCE-7072 | mapred job -history prints duplicate counter in human output | Major | client | Wilfred Spiegelenburg | Wilfred Spiegelenburg | 
| YARN-8221 | RMWebServices also need to honor yarn.resourcemanager.display.per-user-apps | Major | webapp | Sunil Govindan | Sunil Govindan | 
| HDFS-13509 | Bug fix for breakHardlinks() of ReplicaInfo/LocalReplica, and fix TestFileAppend failures on Windows | Major | . | Xiao Liang | Xiao Liang | 
| MAPREDUCE-7073 | Optimize TokenCache#obtainTokensForNamenodesInternal | Major | . | Bibin A Chundatt | Bibin A Chundatt | 
| YARN-8232 | RMContainer lost queue name when RM HA happens | Major | resourcemanager | Hu Ziqian | Hu Ziqian | 
| HDFS-13537 | TestHdfsHelper does not generate jceks path properly for relative path in Windows | Major | . | Xiao Liang | Xiao Liang | 
| HADOOP-15446 | WASB: PageBlobInputStream.skip breaks HBASE replication | Major | fs/azure | Thomas Marquardt | Thomas Marquardt | 
| YARN-8244 | TestContainerSchedulerQueuing.testStartMultipleContainers failed | Major | . | Miklos Szegedi | Jim Brennan | 
| HDFS-13586 | Fsync fails on directories on Windows | Critical | datanode, hdfs | Lukas Majercak | Lukas Majercak | 
| HDFS-13590 | Backport HDFS-12378 to branch-2 | Major | datanode, hdfs, test | Lukas Majercak | Lukas Majercak | 
| HADOOP-15478 | WASB: hflush() and hsync() regression | Major | fs/azure | Thomas Marquardt | Thomas Marquardt | 
| HADOOP-15450 | Avoid fsync storm triggered by DiskChecker and handle disk full situation | Blocker | . | Kihwal Lee | Arpit Agarwal | 
| HDFS-13601 | Optimize ByteString conversions in PBHelper | Major | . | Andrew Wang | Andrew Wang | 
| 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 | 
| YARN-8346 | Upgrading to 3.1 kills running containers with error “Opportunistic container queue is full” | Blocker | . | Rohith Sharma K S | Jason Lowe | 
| HDFS-13611 | Unsafe use of Text as a ConcurrentHashMap key in PBHelperClient | Major | . | Andrew Wang | Andrew Wang | 
| 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 | 
| HDFS-13626 | Fix incorrect username when deny the setOwner operation | Minor | namenode | luhuachao | Zsolt Venczel | 
| MAPREDUCE-7103 | Fix TestHistoryViewerPrinter on windows due to a mismatch line separator | Minor | . | Giovanni Matteo Fumarola | Giovanni Matteo Fumarola | 
| 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 | 
| YARN-8405 | RM zk-state-store.parent-path ACLs has been changed since HADOOP-14773 | Major | . | Rohith Sharma K S | Íñigo Goiri | 
| 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 | 
| 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-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 | 
| HADOOP-15523 | Shell command timeout given is in seconds whereas it is taken as millisec while scheduling | Major | . | Bilwa S T | Bilwa S T | 
| YARN-8444 | NodeResourceMonitor crashes on bad swapFree value | Major | . | Jim Brennan | Jim Brennan | 
| 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 | 
| YARN-8473 | Containers being launched as app tears down can leave containers in NEW state | Major | nodemanager | Jason Lowe | Jason Lowe | 
| 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 |  | 
| HADOOP-15614 | TestGroupsCaching.testExceptionOnBackgroundRefreshHandled reliably fails | Major | . | Kihwal Lee | Weiwei Yang | 
| YARN-4606 | CapacityScheduler: applications could get starved because computation of #activeUsers considers pending apps | Critical | capacity scheduler, capacityscheduler | Karam Singh | Manikandan R | 
| HADOOP-15637 | LocalFs#listLocatedStatus does not filter out hidden .crc files | Minor | fs | Erik Krogen | Erik Krogen | 
| HADOOP-15644 | Hadoop Docker Image Pip Install Fails on branch-2 | Critical | build | Haibo Chen | Haibo Chen | 
| YARN-6966 | NodeManager metrics may return wrong negative values when NM restart | Major | . | Yang Wang | Szilard Nemeth | 
| YARN-8331 | Race condition in NM container launched after done | Major | . | Yang Wang | Pradeep Ambati | 
| HDFS-13758 | DatanodeManager should throw exception if it has BlockRecoveryCommand but the block is not under construction | Major | namenode | Wei-Chiu Chuang | chencan | 
| YARN-8612 | Fix NM Collector Service Port issue in YarnConfiguration | Major | ATSv2 | Prabha Manepalli | Prabha Manepalli | 
| 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 |