| HDFS-10650 | DFSClient#mkdirs and DFSClient#primitiveMkdir should use default directory permission | Minor | . | John Zhuge | John Zhuge | 
| HADOOP-13965 | Groups should be consistent in using default group mapping class | Minor | security | Yiqun Lin | Yiqun Lin | 
| YARN-6977 | Node information is not provided for non am containers in RM logs | Major | capacity scheduler | Sumana Sathish | Suma Shivaprasad | 
| HADOOP-15261 | Upgrade commons-io from 2.4 to 2.5 | Major | minikdc | PandaMonkey | PandaMonkey | 
| 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 | 
| YARN-8222 | Fix potential NPE when gets RMApp from RM context | Critical | . | Tao Yang | Tao Yang | 
| HDFS-13174 | hdfs mover -p /path times out after 20 min | Major | balancer & mover | István Fajth | István Fajth | 
| HDFS-13723 | Occasional “Should be different group” error in TestRefreshUserMappings#testGroupMappingRefresh | Major | security, test | Siyao Meng | Siyao Meng | 
| YARN-7266 | Timeline Server event handler threads locked | Major | ATSv2, timelineserver | Venkata Puneet Ravuri | Prabhu Joseph | 
| HDFS-13677 | Dynamic refresh Disk configuration results in overwriting VolumeMap | Blocker | . | ZanderXu | ZanderXu | 
| HADOOP-16334 | Fix yetus-wrapper not working when HADOOP_YETUS_VERSION >= 0.9.0 | Major | yetus | Wanqiang Ji | Wanqiang Ji | 
| YARN-9594 | Fix missing break statement in ContainerScheduler#handle | Major | . | lujie | lujie | 
| YARN-9744 | RollingLevelDBTimelineStore.getEntityByTime fails with NPE | Major | timelineserver | Prabhu Joseph | Prabhu Joseph | 
| YARN-9785 | Fix DominantResourceCalculator when one resource is zero | Blocker | . | Bilwa S T | Bilwa S T | 
| YARN-9833 | Race condition when DirectoryCollection.checkDirs() runs during container launch | Major | . | Peter Bacsko | Peter Bacsko | 
| HDFS-14216 | NullPointerException happens in NamenodeWebHdfs | Critical | . | lujie | lujie | 
| YARN-9984 | FSPreemptionThread can cause NullPointerException while app is unregistered with containers running on a node | Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg | 
| HADOOP-16841 | The description of hadoop.http.authentication.signature.secret.file contains outdated information | Minor | documentation | Akira Ajisaka | Xieming Li | 
| HADOOP-16768 | SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data | Major | io, test | zhao bo | Akira Ajisaka | 
| HADOOP-17068 | client fails forever when namenode ipaddr changed | Major | hdfs-client | Sean Chow | Sean Chow | 
| HADOOP-17116 | Skip Retry INFO logging on first failover from a proxy | Major | ha | Hanisha Koneru | Hanisha Koneru | 
| MAPREDUCE-7294 | Only application master should upload resource to Yarn Shared Cache | Major | mrv2 | zhenzhao wang | zhenzhao wang | 
| YARN-10438 | Handle null containerId in ClientRMService#getContainerReport() | Major | resourcemanager | Raghvendra Singh | Shubham Gupta | 
| MAPREDUCE-7289 | Fix wrong comment in LongLong.java | Trivial | documentation, examples | Akira Ajisaka | Wanqiang Ji | 
| 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 | TestNMProxy.testNMProxyRPCRetry is not consistent | Major | . | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-17223 | update  org.apache.httpcomponents:httpclient to 4.5.13 and httpcore to 4.4.13 | Blocker | . | Pranav Bheda | Pranav Bheda | 
| HADOOP-17309 | Javadoc warnings and errors are ignored in the precommit jobs | Major | build, documentation | Akira Ajisaka | Akira Ajisaka | 
| MAPREDUCE-7302 | Upgrading to JUnit 4.13 causes testcase TestFetcher.testCorruptedIFile() to fail | Major | test | Peter Bacsko | Peter Bacsko | 
| HDFS-15644 | Failed volumes can cause DNs to stop block reporting | Major | block placement, datanode | Ahmed Hussein | Ahmed Hussein | 
| YARN-10467 | ContainerIdPBImpl objects can be leaked in RMNodeImpl.completedContainers | Major | resourcemanager | Haibo Chen | Haibo Chen | 
| HADOOP-17340 | TestLdapGroupsMapping failing -string mismatch in exception validation | Major | test | Steve Loughran | Steve Loughran | 
| HADOOP-17352 | Update PATCH_NAMING_RULE in the personality file | Minor | build | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-17358 | Improve excessive reloading of Configurations | Major | conf | Ahmed Hussein | Ahmed Hussein | 
| YARN-8558 | NM recovery level db not cleaned up properly on container finish | Critical | . | Bibin Chundatt | Bibin Chundatt | 
| YARN-10498 | Fix Yarn CapacityScheduler Markdown document | Trivial | documentation | zhaoshengjie | zhaoshengjie | 
| HDFS-15660 | StorageTypeProto is not compatiable between 3.x and 2.6 | Major | . | Ryan Wu | Ryan Wu | 
| HDFS-15725 | Lease Recovery never completes for a committed block which the DNs never finalize | Major | namenode | Stephen O’Donnell | Stephen O’Donnell | 
| HADOOP-17438 | Increase docker memory limit in Jenkins | Major | build, scripts, test, yetus | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-16947 | Stale record should be remove when MutableRollingAverages generating aggregate data. | Major | . | Haibin Huang | Haibin Huang | 
| HDFS-15632 | AbstractContractDeleteTest should set recursive parameter to true for recursive test cases. | Major | . | Konstantin Shvachko | Anton Kutuzov | 
| HDFS-10498 | Intermittent test failure org.apache.hadoop.hdfs.server.namenode.snapshot.TestSnapshotFileLength.testSnapshotfileLength | Major | hdfs, snapshots | Hanisha Koneru | Jim Brennan | 
| HADOOP-17495 | Backport HADOOP-16947 “Stale record should be remove when MutableRollingAverages generating aggregate data.” to branch 2.10 | Major | . | Felix N | Felix N | 
| HDFS-15801 | Backport HDFS-14582 to branch-2.10 (Failed to start DN with ArithmeticException when NULL checksum used) | Major | . | Janus Chow | Janus Chow | 
| YARN-10428 | Zombie applications in the YARN queue using FAIR + sizebasedweight | Critical | capacityscheduler | Guang Yang | Andras Gyori | 
| HDFS-15792 | ClasscastException while loading FSImage | Major | nn | Renukaprasad C | Renukaprasad C | 
| HADOOP-17516 | Upgrade ant to 1.10.9 | Major | . | Akira Ajisaka | Akira Ajisaka | 
| YARN-10500 | TestDelegationTokenRenewer fails intermittently | Major | test | Akira Ajisaka | Masatake Iwasaki | 
| MAPREDUCE-7323 | Remove job_history_summary.py | Major | . | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-17510 | Hadoop prints sensitive Cookie information. | Major | . | Renukaprasad C | Renukaprasad C | 
| HDFS-15422 | Reported IBR is partially replaced with stored info when queuing. | Critical | namenode | Kihwal Lee | Stephen O’Donnell | 
| YARN-10651 | CapacityScheduler crashed with NPE in AbstractYarnScheduler.updateNodeResource() | Major | . | Haibo Chen | Haibo Chen | 
| MAPREDUCE-7320 | ClusterMapReduceTestCase does not clean directories | Major | . | Ahmed Hussein | Ahmed Hussein | 
| HDFS-15849 | ExpiredHeartbeats metric should be of Type.COUNTER | Major | metrics | Konstantin Shvachko | Qi Zhu | 
| HADOOP-17557 | skip-dir option is not processed by Yetus | Major | build, precommit, yetus | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-17572 | [branch-2.10] Docker image build fails due to the removal of openjdk-7-jdk package | Blocker | build | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-17582 | Replace GitHub App Token with GitHub OAuth token | Major | build | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-17586 | Upgrade org.codehaus.woodstox:stax2-api to 4.2.1 | Major | . | Ayush Saxena | Ayush Saxena | 
| YARN-10588 | Percentage of queue and cluster is zero in WebUI | Major | . | Bilwa S T | Bilwa S T | 
| MAPREDUCE-7322 | revisiting TestMRIntermediateDataEncryption | Major | job submission, security, test | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-17592 | Fix the wrong CIDR range example in Proxy User documentation | Minor | documentation | Kwangsun Noh | Kwangsun Noh | 
| MAPREDUCE-7325 | Intermediate data encryption is broken in LocalJobRunner | Major | job submission, security | Ahmed Hussein | Ahmed Hussein | 
| YARN-10697 | Resources are displayed in bytes in UI for schedulers other than capacity | Major | . | Bilwa S T | Bilwa S T | 
| HADOOP-17602 | Upgrade JUnit to 4.13.1 | Major | build, security, test | Ahmed Hussein | Ahmed Hussein | 
| MAPREDUCE-7332 | Fix SpillCallBackPathsFinder to use JDK7 on branch-2.10 | Minor | job submission, security | Ahmed Hussein | Ahmed Hussein | 
| YARN-10501 | Can’t remove all node labels after add node label without nodemanager port | Critical | yarn | caozhiqiang | caozhiqiang | 
| YARN-10716 | Fix typo in ContainerRuntime | Trivial | documentation | Wanqiang Ji | xishuhai | 
| HADOOP-17603 | Upgrade tomcat-embed-core to 7.0.108 | Major | build, security | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-17601 | Upgrade Jackson databind in branch-2.10 to 2.9.10.7 | Major | . | Ahmed Hussein | Ahmed Hussein | 
| YARN-10733 | TimelineService Hbase tests are failing with timeout error on branch-2.10 | Major | test, timelineserver, yarn | Ahmed Hussein | Ahmed Hussein | 
| HDFS-15963 | Unreleased volume references cause an infinite loop | Critical | datanode | Shuyan Zhang | Shuyan Zhang | 
| YARN-10460 | Upgrading to JUnit 4.13 causes tests in TestNodeStatusUpdater to fail | Major | nodemanager, test | Peter Bacsko | Peter Bacsko | 
| YARN-10749 | Can’t remove all node labels after add node label without nodemanager port, broken by YARN-10647 | Major | . | D M Murali Krishna Reddy | D M Murali Krishna Reddy | 
| YARN-10555 | Missing access check before getAppAttempts | Critical | webapp | lujie | lujie | 
| HADOOP-17718 | Explicitly set locale in the Dockerfile | Blocker | build | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| YARN-10770 | container-executor permission is wrong in SecureContainer.md | Major | documentation | Akira Ajisaka | Siddharth Ahuja | 
| HDFS-15915 | Race condition with async edits logging due to updating txId outside of the namesystem log | Major | hdfs, namenode | Konstantin Shvachko | Konstantin Shvachko | 
| HDFS-16040 | RpcQueueTime metric counts requeued calls as unique events. | Major | hdfs | Simbarashe Dzinamarira | Simbarashe Dzinamarira | 
| HDFS-16068 | WebHdfsFileSystem has a possible connection leak in connection with HttpFS | Major | . | Takanobu Asanuma | Takanobu Asanuma | 
| HDFS-15618 | Improve datanode shutdown latency | Major | datanode | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-17769 | Upgrade JUnit to 4.13.2 | Major | . | Ahmed Hussein | Ahmed Hussein | 
| YARN-10824 | Title not set for JHS and NM webpages | Major | . | Rajshree Mishra | Bilwa S T | 
| MAPREDUCE-7353 | Mapreduce job fails when NM is stopped | Major | . | Bilwa S T | Bilwa S T | 
| HADOOP-17793 | Better token validation | Major | . | Artem Smotrakov | Artem Smotrakov | 
| HDFS-16042 | DatanodeAdminMonitor scan should be delay based | Major | datanode | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-17028 | ViewFS should initialize target filesystems lazily | Major | client-mounts, fs, viewfs | Uma Maheswara Rao G | Abhishek Das | 
| HADOOP-17370 | Upgrade commons-compress to 1.21 | Major | common | Dongjoon Hyun | Akira Ajisaka | 
| HADOOP-17886 | Upgrade ant to 1.10.11 | Major | . | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-17885 | Upgrade JSON smart to 1.3.3 on branch-2.10 | Major | . | Ahmed Hussein | Ahmed Hussein | 
| HDFS-16207 | Remove NN logs stack trace for non-existent xattr query | Major | namenode | Ahmed Hussein | Ahmed Hussein | 
| HDFS-16198 | Short circuit read leaks Slot objects when InvalidToken exception is thrown | Major | . | Eungsop Yoo | Eungsop Yoo | 
| HDFS-16233 | Do not use exception handler to implement copy-on-write for EnumCounters | Major | namenode | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| HDFS-16181 | [SBN Read] Fix metric of RpcRequestCacheMissAmount can’t display when tailEditLog form JN | Critical | . | wangzhaohui | wangzhaohui | 
| YARN-8127 | Resource leak when async scheduling is enabled | Critical | . | Weiwei Yang | Tao Yang | 
| HADOOP-17964 | Increase Java heap size for running Maven in Dockerfile of branch-2.10 | Major | build | Masatake Iwasaki | Masatake Iwasaki | 
| HADOOP-16532 | Fix TestViewFsTrash to use the correct homeDir. | Minor | test, viewfs | Steve Loughran | Xing Lin | 
| HADOOP-17965 | Fix documentation build failure using JDK 7 on branch-2.10 | Major | build | Masatake Iwasaki | Masatake Iwasaki | 
| HDFS-7612 | TestOfflineEditsViewer.testStored() uses incorrect default value for cacheDir | Major | test | Konstantin Shvachko | Michael Kuchenbecker | 
| HADOOP-17978 | Exclude ASF license check for pkg-resolver JSON | Major | build | Gautham Banasandra | Gautham Banasandra | 
| HADOOP-17880 | Build Hadoop on Centos 7 | Major | build | baizhendong |  | 
| HADOOP-17988 | Disable JIRA plugin for YETUS on Hadoop | Critical | build | Gautham Banasandra | Gautham Banasandra | 
| HDFS-16311 | Metric metadataOperationRate calculation error in DataNodeVolumeMetrics | Major | . | Tao Li | Tao Li | 
| HADOOP-17999 | No-op implementation of setWriteChecksum and setVerifyChecksum in ViewFileSystem | Major | . | Abhishek Das | Abhishek Das | 
| YARN-9063 | ATS 1.5 fails to start if RollingLevelDb files are corrupt or missing | Major | timelineserver, timelineservice | Tarun Parimi | Ashutosh Gupta | 
| HADOOP-18049 | Pin python lazy-object-proxy to 1.6.0 in Docker file as newer versions are incompatible with python2.7 | Major | build | Dhananjay Badaya | Dhananjay Badaya | 
| HADOOP-13500 | Synchronizing iteration of Configuration properties object | Major | conf | Jason Darrell Lowe | Dhananjay Badaya | 
| YARN-10178 | Global Scheduler async thread crash caused by ’Comparison method violates its general contract | Major | capacity scheduler | tuyu | Andras Gyori | 
| HDFS-16410 | Insecure Xml parsing in OfflineEditsXmlLoader | Minor | . | Ashutosh Gupta | Ashutosh Gupta | 
| HADOOP-18158 | Fix failure of create-release script due to releasedocmaker changes in branch-2.10 | Major | build | Masatake Iwasaki | Masatake Iwasaki | 
| HADOOP-18129 | Change URI[] in INodeLink to String[] to reduce memory footprint of ViewFileSystem | Major | . | Abhishek Das | Abhishek Das | 
| HDFS-16517 | In 2.10 the distance metric is wrong for non-DN machines | Major | . | Owen O’Malley | Owen O’Malley | 
| HDFS-16518 | KeyProviderCache close cached KeyProvider with Hadoop ShutdownHookManager | Major | hdfs | Lei Yang | Lei Yang | 
| HADOOP-18169 | getDelegationTokens in ViewFs should also fetch the token from the fallback FS | Major | . | Xing Lin | Xing Lin | 
| YARN-10720 | YARN WebAppProxyServlet should support connection timeout to prevent proxy server from hanging | Critical | . | Qi Zhu | Qi Zhu | 
| HDFS-11041 | Unable to unregister FsDatasetState MBean if DataNode is shutdown twice | Trivial | datanode | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| MAPREDUCE-7246 | In MapredAppMasterRest#Mapreduce_Application_Master_Info_API, the datatype of appId should be “string”. | Major | documentation | jenny | Ashutosh Gupta | 
| YARN-11126 | ZKConfigurationStore Java deserialisation vulnerability | Major | yarn | Tamas Domok | Tamas Domok | 
| YARN-11162 | Set the zk acl for nodes created by ZKConfigurationStore. | Major | resourcemanager | Owen O’Malley | Owen O’Malley |