| HADOOP-9099 | NetUtils.normalizeHostName fails on domains where UnknownHost resolves to an IP address | Minor | test | Ivan Mitic | Ivan Mitic | 
| HADOOP-10342 | Extend UserGroupInformation to return a UGI given a preauthenticated kerberos Subject | Major | security | Larry McCay | Larry McCay | 
| YARN-1718 | Fix a couple isTerminals in Fair Scheduler queue placement rules | Major | scheduler | Sandy Ryza | Sandy Ryza | 
| YARN-1736 | FS: AppSchedulable.assignContainer’s priority argument is redundant | Minor | scheduler | Sandy Ryza | Naren Koneru | 
| MAPREDUCE-5671 | NaN can be created by client and assign to Progress | Major | . | Chen He | Chen He | 
| YARN-1678 | Fair scheduler gabs incessantly about reservations | Major | scheduler | Sandy Ryza | Sandy Ryza | 
| YARN-1429 | *nix: Allow a way for users to augment classpath of YARN daemons | Trivial | client | Sandy Ryza | Jarek Jarcec Cecho | 
| MAPREDUCE-5665 | Add audience annotations to MiniMRYarnCluster and MiniMRCluster | Major | test | Sandy Ryza | Anubhav Dhoot | 
| HADOOP-10378 | Typo in help printed by hdfs dfs -help | Major | . | Mit Desai | Mit Desai | 
| YARN-1790 | Fair Scheduler UI not showing apps table | Major | . | bc Wong | bc Wong | 
| MAPREDUCE-5765 | Update hadoop-pipes examples README | Minor | pipes | Jonathan Eagles | Mit Desai | 
| HADOOP-10332 | HttpServer’s jetty audit log always logs 200 OK | Major | . | Daryn Sharp | Jonathan Eagles | 
| MAPREDUCE-5713 | InputFormat and JobConf JavaDoc Fixes | Trivial | documentation | Ben Robie | Chen He | 
| MAPREDUCE-5456 | TestFetcher.testCopyFromHostExtraBytes is missing | Minor | mrv2, test | Jason Lowe | Jason Lowe | 
| YARN-1520 | update capacity scheduler docs to include necessary parameters | Major | . | Chen He | Chen He | 
| YARN-1136 | Replace junit.framework.Assert with org.junit.Assert | Major | . | Karthik Kambatla | Chen He | 
| HDFS-6112 | NFS Gateway docs are incorrect for allowed hosts configuration | Minor | nfs | Aaron T. Myers | Aaron T. Myers | 
| HADOOP-10418 | SaslRpcClient should not assume that remote principals are in the default_realm | Major | security | Aaron T. Myers | Aaron T. Myers | 
| HDFS-3087 | Decomissioning on NN restart can complete without blocks being replicated | Critical | namenode | Kihwal Lee | Rushabh S Shah | 
| HDFS-6156 | Simplify the JMX API that provides snapshot information | Major | . | Haohui Mai | Shinichi Yamashita | 
| MAPREDUCE-5759 | Remove unnecessary conf load in Limits | Major | . | Sandy Ryza | Sandy Ryza | 
| HADOOP-10414 | Incorrect property name for RefreshUserMappingProtocol in hadoop-policy.xml | Major | conf | Joey Echeverria | Joey Echeverria | 
| HDFS-5591 | Checkpointing should use monotonic time when calculating period | Minor | namenode | Andrew Wang | Charles Lamb | 
| HADOOP-10459 | distcp V2 doesn’t preserve root dir’s attributes when -p is specified | Major | tools/distcp | Yongjun Zhang | Yongjun Zhang | 
| HDFS-6190 | minor textual fixes in DFSClient | Trivial | tools | Charles Lamb | Charles Lamb | 
| HADOOP-10462 | DF#getFilesystem is not parsing the command output | Major | . | Akira Ajisaka | Akira Ajisaka | 
| HDFS-6159 | TestBalancerWithNodeGroup.testBalancerWithNodeGroup fails if there is block missing after balancer success | Major | test | Chen He | Chen He | 
| HDFS-6181 | Fix the wrong property names in NFS user guide | Trivial | documentation, nfs | Brandon Li | Brandon Li | 
| HDFS-6180 | dead node count / listing is very broken in JMX and old GUI | Blocker | . | Travis Thompson | Haohui Mai | 
| HDFS-6143 | WebHdfsFileSystem open should throw FileNotFoundException for non-existing paths | Blocker | . | Gera Shegalov | Gera Shegalov | 
| HADOOP-10475 | ConcurrentModificationException in AbstractDelegationTokenSelector.selectToken() | Major | security | Arpit Gupta | Jing Zhao | 
| YARN-1784 | TestContainerAllocation assumes CapacityScheduler | Minor | resourcemanager | Karthik Kambatla | Robert Kanter | 
| HDFS-6160 | TestSafeMode occasionally fails | Major | test | Ted Yu | Arpit Agarwal | 
| HDFS-5669 | Storage#tryLock() should check for null before logging successfull message | Major | datanode | Vinayakumar B | Vinayakumar B | 
| HADOOP-10350 | BUILDING.txt should mention openssl dependency required for hadoop-pipes | Major | . | Vinayakumar B | Vinayakumar B | 
| HADOOP-10495 | TestFileUtil fails on Windows due to bad permission assertions. | Trivial | fs, test | Chris Nauroth | Chris Nauroth | 
| HADOOP-10496 | Metrics system FileSink can leak file descriptor. | Major | metrics | Chris Nauroth | Chris Nauroth | 
| HDFS-6238 | TestDirectoryScanner leaks file descriptors. | Minor | datanode, test | Chris Nauroth | Chris Nauroth | 
| HADOOP-10500 | TestDoAsEffectiveUser fails on JDK7 due to failure to reset proxy user configuration. | Trivial | security, test | Chris Nauroth | Chris Nauroth | 
| HDFS-6243 | HA NameNode transition to active or shutdown may leave lingering image transfer thread. | Major | ha, namenode | Chris Nauroth | Chris Nauroth | 
| HDFS-6194 | Create new tests for ByteRangeInputStream | Major | . | Haohui Mai | Akira Ajisaka | 
| MAPREDUCE-5836 | Fix typo in RandomTextWriter | Trivial | . | Akira Ajisaka | Akira Ajisaka | 
| MAPREDUCE-5775 | Remove unnecessary job.setNumReduceTasks in SleepJob.createJob | Minor | . | Liyin Liang | jhanver chand sharma | 
| HDFS-6214 | Webhdfs has poor throughput for files >2GB | Major | webhdfs | Daryn Sharp | Daryn Sharp | 
| HDFS-4909 | Avoid protocol buffer RPC namespace clashes | Blocker | datanode, journal-node, namenode | Ralph Castain | Colin P. McCabe | 
| YARN-1940 | deleteAsUser() terminates early without deleting more files on error | Major | . | Kihwal Lee | Rushabh S Shah | 
| MAPREDUCE-4937 | MR AM handles an oversized split metainfo file poorly | Major | mr-am | Jason Lowe | Eric Payne | 
| YARN-1865 | ShellScriptBuilder does not check for some error conditions | Minor | nodemanager | Remus Rusanu | Remus Rusanu | 
| HADOOP-9919 | Update hadoop-metrics2.properties examples to Yarn | Major | conf | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-10526 | Chance for Stream leakage in CompressorStream | Minor | . | SreeHari | Rushabh S Shah | 
| HDFS-6178 | Decommission on standby NN couldn’t finish | Major | namenode | Ming Ma | Ming Ma | 
| HDFS-6213 | TestDataNodeConfig failing on Jenkins runs due to DN web port in use | Minor | test | Steve Loughran | Andrew Wang | 
| HADOOP-10251 | Both NameNodes could be in STANDBY State if SNN network is unstable | Critical | ha | Vinayakumar B | Vinayakumar B | 
| HADOOP-10531 | hadoop-config.sh - bug in –hosts argument | Major | . | Sebastien Barrier | Sebastien Barrier | 
| MAPREDUCE-5846 | Rumen doesn’t understand JobQueueChangedEvent | Major | tools/rumen | Nathan Roberts | Nathan Roberts | 
| MAPREDUCE-5837 | MRAppMaster fails when checking on uber mode | Critical | . | Haohui Mai | Haohui Mai | 
| HADOOP-10540 | Datanode upgrade in Windows fails with hardlink error. | Major | tools | Huan Huang | Arpit Agarwal | 
| MAPREDUCE-5749 | TestRMContainerAllocator#testReportedAppProgress Failed | Major | . | Hong Shen | Jason Lowe | 
| HDFS-6270 | Secondary namenode status page shows transaction count in bytes | Minor | . | Benoy Antony | Benoy Antony | 
| HDFS-6288 | DFSInputStream Pread doesn’t update ReadStatistics | Minor | . | Juan Yu | Juan Yu | 
| HADOOP-10508 | RefreshCallQueue fails when authorization is enabled | Major | ipc | Chris Li | Chris Li | 
| HDFS-3828 | Block Scanner rescans blocks too frequently | Major | . | Andy Isaacson | Andy Isaacson | 
| YARN-738 | TestClientRMTokens is failing irregularly while running all yarn tests | Major | . | Omkar Vinit Joshi | Ming Ma | 
| HDFS-6216 | Issues with webhdfs and http proxies | Major | webhdfs | Daryn Sharp | Daryn Sharp | 
| HADOOP-10547 | Give SaslPropertiesResolver.getDefaultProperties() public scope | Major | security | Jason Dere | Benoy Antony | 
| HADOOP-10543 | RemoteException’s unwrapRemoteException method failed for PathIOException | Major | . | Yongjun Zhang | Yongjun Zhang | 
| HDFS-6289 | HA failover can fail if there are pending DN messages for DNs which no longer exist | Critical | ha | Aaron T. Myers | Aaron T. Myers | 
| HADOOP-10568 | Add s3 server-side encryption | Major | fs/s3 | David S. Wang | David S. Wang | 
| HDFS-6337 | Setfacl testcase is failing due to dash character in username in TestAclCLI | Major | test | Uma Maheswara Rao G | Uma Maheswara Rao G | 
| HADOOP-10541 | InputStream in MiniKdc#initKDCServer for minikdc.ldiff is not closed | Minor | test | Ted Yu | Swarnim Kulkarni | 
| HADOOP-10517 | InputStream is not closed in two methods of JarFinder | Minor | test, util | Ted Yu | Ted Yu | 
| HADOOP-10581 | TestUserGroupInformation#testGetServerSideGroups fails because groups stored in Set and ArrayList are compared | Major | . | Mit Desai | Mit Desai | 
| HADOOP-10158 | SPNEGO should work with multiple interfaces/SPNs. | Critical | . | Kihwal Lee | Daryn Sharp | 
| MAPREDUCE-5884 | History server uses short user name when canceling tokens | Major | jobhistoryserver, security | Mohammad Kamrul Islam | Mohammad Kamrul Islam | 
| YARN-2036 | Document yarn.resourcemanager.hostname in ClusterSetup | Minor | documentation | Karthik Kambatla | Ray Chiang | 
| HDFS-6294 | Use INode IDs to avoid conflicts when a file open for write is renamed | Major | namenode | Colin P. McCabe | Colin P. McCabe | 
| HDFS-6230 | Expose upgrade status through NameNode web UI | Major | namenode | Arpit Agarwal | Mit Desai | 
| HDFS-5522 | Datanode disk error check may be incorrectly skipped | Major | . | Kihwal Lee | Rushabh S Shah | 
| HDFS-6367 | EnumSetParam$Domain#parse fails for parameter containing more than one enum. | Major | webhdfs | Yi Liu | Yi Liu | 
| HADOOP-10585 | Retry polices ignore interrupted exceptions | Critical | ipc | Daryn Sharp | Daryn Sharp | 
| HDFS-6305 | WebHdfs response decoding may throw RuntimeExceptions | Critical | webhdfs | Daryn Sharp | Daryn Sharp | 
| MAPREDUCE-5814 | fat jar with *-default.xml may fail when mapreduce.job.classloader=true. | Major | mrv2 | Gera Shegalov | Gera Shegalov | 
| MAPREDUCE-5652 | NM Recovery. ShuffleHandler should handle NM restarts | Major | . | Karthik Kambatla | Jason Lowe | 
| MAPREDUCE-5888 | Failed job leaves hung AM after it unregisters | Major | mr-am | Jason Lowe | Jason Lowe | 
| HDFS-6355 | Fix divide-by-zero, improper use of wall-clock time in BlockPoolSliceScanner | Major | . | Colin P. McCabe | Colin P. McCabe | 
| YARN-1981 | Nodemanager version is not updated when a node reconnects | Major | resourcemanager | Jason Lowe | Jason Lowe | 
| HDFS-6370 | Web UI fails to display in intranet under IE | Major | datanode, journal-node, namenode | Haohui Mai | Haohui Mai | 
| HDFS-6293 | Issues with OIV processing PB-based fsimages | Blocker | . | Kihwal Lee | Kihwal Lee | 
| HDFS-6381 | Fix a typo in INodeReference.java | Trivial | documentation | Binglin Chang | Binglin Chang | 
| HADOOP-10401 | ShellBasedUnixGroupsMapping#getGroups does not always return primary group first | Major | util | Colin P. McCabe | Akira Ajisaka | 
| HDFS-6400 | Cannot execute “hdfs oiv_legacy” | Critical | tools | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-10588 | Workaround for jetty6 acceptor startup issue | Major | . | Kihwal Lee | Kihwal Lee | 
| HDFS-6345 | DFS.listCacheDirectives() should allow filtering based on cache directive ID | Major | caching | Lenni Kuff | Andrew Wang | 
| HDFS-6250 | TestBalancerWithNodeGroup.testBalancerWithRackLocality fails | Major | . | Kihwal Lee | Binglin Chang | 
| MAPREDUCE-5874 | Creating MapReduce REST API section | Major | documentation | Ravi Prakash | Tsuyoshi Ozawa | 
| HDFS-4913 | Deleting file through fuse-dfs when using trash fails requiring root permissions | Major | fuse-dfs | Stephen Chu | Colin P. McCabe | 
| HADOOP-10609 | .gitignore should ignore .orig and .rej files | Major | . | Karthik Kambatla | Karthik Kambatla | 
| HADOOP-10489 | UserGroupInformation#getTokens and UserGroupInformation#addToken can lead to ConcurrentModificationException | Major | . | Jing Zhao | Robert Kanter | 
| MAPREDUCE-5309 | 2.0.4 JobHistoryParser can’t parse certain failed job history files generated by 2.0.3 history server | Major | jobhistoryserver, mrv2 | Vrushali C | Rushabh S Shah | 
| YARN-2050 | Fix LogCLIHelpers to create the correct FileContext | Major | . | Ming Ma | Ming Ma | 
| HDFS-6421 | Fix vecsum.c compile on BSD and some other systems | Major | libhdfs | Jason Lowe | Mit Desai | 
| HDFS-6409 | Fix typo in log message about NameNode layout version upgrade. | Trivial | namenode | Chris Nauroth | Chen He | 
| HDFS-6438 | DeleteSnapshot should be a DELETE request in WebHdfs | Major | webhdfs | Jing Zhao | Jing Zhao | 
| HDFS-6423 | Diskspace quota usage should be updated when appending data to partial block | Major | namenode | Jing Zhao | Jing Zhao | 
| YARN-2073 | Fair Scheduler: Add a utilization threshold to prevent preempting resources when cluster is free | Critical | scheduler | Karthik Kambatla | Karthik Kambatla | 
| YARN-2096 | Race in TestRMRestart#testQueueMetricsOnRMRestart | Major | . | Anubhav Dhoot | Anubhav Dhoot | 
| HDFS-6443 | Fix MiniQJMHACluster related test failures | Minor | test | Zesheng Wu | Zesheng Wu | 
| HDFS-6227 | ShortCircuitCache#unref should purge ShortCircuitReplicas whose streams have been closed by java interrupts | Major | . | Jing Zhao | Colin P. McCabe | 
| HADOOP-10625 | Configuration: names should be trimmed when putting/getting to properties | Major | conf | Wangda Tan | Wangda Tan | 
| MAPREDUCE-5862 | Line records longer than 2x split size aren’t handled correctly | Critical | . | bc Wong | bc Wong | 
| YARN-596 | Use scheduling policies throughout the queue hierarchy to decide which containers to preempt | Major | scheduler | Sandy Ryza | Wei Yan | 
| MAPREDUCE-5895 | FileAlreadyExistsException was thrown : Temporary Index File can not be cleaned up because OutputStream doesn’t close properly | Major | client | Kousuke Saruta | Kousuke Saruta | 
| HADOOP-10602 | Documentation has broken “Go Back” hyperlinks. | Trivial | documentation | Chris Nauroth | Akira Ajisaka | 
| YARN-2112 | Hadoop-client is missing jackson libs due to inappropriate configs in pom.xml | Major | . | Zhijie Shen | Zhijie Shen | 
| HDFS-6461 | Use Time#monotonicNow to compute duration in DataNode#shutDown | Trivial | datanode | James Thomas | James Thomas | 
| HDFS-6462 | NFS: fsstat request fails with the secure hdfs | Major | nfs | Yesha Vora | Brandon Li | 
| HADOOP-10639 | FileBasedKeyStoresFactory initialization is not using default for SSL_REQUIRE_CLIENT_CERT_KEY | Major | security | Alejandro Abdelnur | Alejandro Abdelnur | 
| HADOOP-10638 | Updating hadoop-daemon.sh to work as expected when nfs is started as a privileged user. | Major | nfs | Manikandan Narayanaswamy | Manikandan Narayanaswamy | 
| YARN-2054 | Better defaults for YARN ZK configs for retries and retry-inteval when HA is enabled | Major | resourcemanager | Karthik Kambatla | Karthik Kambatla | 
| HDFS-6404 | HttpFS should use a 000 umask for mkdir and create operations | Major | . | Alejandro Abdelnur | Mike Yoder | 
| YARN-1868 | YARN status web ui does not show correctly in IE 11 | Major | webapp | Chuan Liu | Chuan Liu | 
| HDFS-6472 | fix typo in webapps/hdfs/explorer.js | Trivial | . | Juan Yu | Juan Yu | 
| HDFS-6056 | Clean up NFS config settings | Major | nfs | Aaron T. Myers | Brandon Li | 
| YARN-2103 | Inconsistency between viaProto flag and initial value of SerializedExceptionProto.Builder | Major | . | Binglin Chang | Binglin Chang | 
| YARN-1550 | NPE in FairSchedulerAppsBlock#render | Critical | fairscheduler | caolong | Anubhav Dhoot | 
| HADOOP-10630 | Possible race condition in RetryInvocationHandler | Major | . | Jing Zhao | Jing Zhao | 
| HDFS-6424 | blockReport doesn’t need to invalidate blocks on SBN | Major | . | Ming Ma | Ming Ma | 
| YARN-1913 | With Fair Scheduler, cluster can logjam when all resources are consumed by AMs | Major | scheduler | bc Wong | Wei Yan | 
| YARN-2119 | DEFAULT_PROXY_ADDRESS should use DEFAULT_PROXY_PORT | Major | . | Anubhav Dhoot | Anubhav Dhoot | 
| HDFS-6464 | Support multiple xattr.name parameters for WebHDFS getXAttrs. | Major | webhdfs | Yi Liu | Yi Liu | 
| MAPREDUCE-5898 | distcp to support preserving HDFS extended attributes(XAttrs) | Major | distcp | Uma Maheswara Rao G | Yi Liu | 
| HADOOP-10647 | String Format Exception in SwiftNativeFileSystemStore.java | Minor | fs/swift | Gene Kim | Gene Kim | 
| HDFS-6487 | TestStandbyCheckpoint#testSBNCheckpoints is racy | Major | . | Mit Desai | Mit Desai | 
| HDFS-6497 | Make TestAvailableSpaceVolumeChoosingPolicy deterministic | Minor | test | Colin P. McCabe | Colin P. McCabe | 
| YARN-2122 | In AllocationFileLoaderService, the reloadThread should be created in init() and started in start() | Major | scheduler | Karthik Kambatla | Robert Kanter | 
| YARN-2128 | FairScheduler: Incorrect calculation of amResource usage | Major | . | Wei Yan | Wei Yan | 
| YARN-2132 | ZKRMStateStore.ZKAction#runWithRetries doesn’t log the exception it encounters | Major | resourcemanager | Karthik Kambatla | Vamsee Yarlagadda | 
| HDFS-6500 | Snapshot shouldn’t be removed silently after renaming to an existing snapshot | Blocker | snapshots | Junping Du | Tsz Wo Nicholas Sze | 
| HDFS-6399 | Add note about setfacl in HDFS permissions guide | Minor | documentation, namenode | Charles Lamb | Chris Nauroth | 
| HADOOP-10658 | SSLFactory expects truststores being configured | Major | security | Alejandro Abdelnur | Alejandro Abdelnur | 
| HADOOP-10664 | TestNetUtils.testNormalizeHostName fails | Major | . | Chen He | Aaron T. Myers | 
| HADOOP-9555 | HA functionality that uses ZooKeeper may experience inadvertent TCP RST and miss session expiration event due to bug in client connection management | Major | ha | Chris Nauroth | Chris Nauroth | 
| MAPREDUCE-5834 | TestGridMixClasses tests timesout on branch-2 | Major | . | Mit Desai | Mit Desai | 
| HDFS-6364 | Incorrect check for unknown datanode in Balancer | Major | balancer & mover | Benoy Antony | Benoy Antony | 
| YARN-2124 | ProportionalCapacityPreemptionPolicy cannot work because it’s initialized before scheduler initialized | Critical | resourcemanager, scheduler | Wangda Tan | Wangda Tan | 
| MAPREDUCE-5920 | Add Xattr option in DistCp docs | Minor | distcp, documentation | Uma Maheswara Rao G | Yi Liu | 
| HADOOP-10656 | The password keystore file is not picked by LDAP group mapping | Major | security | Brandon Li | Brandon Li | 
| HADOOP-10622 | Shell.runCommand can deadlock | Critical | . | Jason Lowe | Gera Shegalov | 
| HDFS-6379 | HTTPFS - Implement ACLs support | Major | . | Alejandro Abdelnur | Mike Yoder | 
| YARN-2148 | TestNMClient failed due more exit code values added and passed to AM | Major | client | Wangda Tan | Wangda Tan | 
| HDFS-6471 | Make moveFromLocal CLI testcases to be non-disruptive | Major | test | Dasha Boudnik | Dasha Boudnik | 
| YARN-2075 | TestRMAdminCLI consistently fail on trunk and branch-2 | Major | . | Zhijie Shen | Kenji Kikushima | 
| HDFS-6395 | Skip checking xattr limits for non-user-visible namespaces | Major | namenode | Andrew Wang | Yi Liu | 
| HDFS-3493 | Invalidate excess corrupted blocks as long as minimum replication is satisfied | Major | namenode | J.Andreina | Juan Yu | 
| YARN-2155 | FairScheduler: Incorrect threshold check for preemption | Major | . | Wei Yan | Wei Yan | 
| HADOOP-10678 | SecurityUtil has unnecessary synchronization on collection used for only tests | Minor | security | Benoy Antony | Benoy Antony | 
| HDFS-6470 | TestBPOfferService.testBPInitErrorHandling is flaky | Major | . | Andrew Wang | Ming Ma | 
| HADOOP-10657 | Have RetryInvocationHandler log failover attempt at INFO level | Major | . | Ming Ma | Ming Ma | 
| HADOOP-10683 | Users authenticated with KERBEROS are recorded as being authenticated with SIMPLE | Major | security | Benoy Antony | Benoy Antony | 
| HDFS-6539 | test_native_mini_dfs is skipped in hadoop-hdfs/pom.xml | Major | . | Binglin Chang | Binglin Chang | 
| HDFS-6518 | TestCacheDirectives#testExceedsCapacity should take FSN read lock when accessing pendingCached list | Major | . | Yongjun Zhang | Andrew Wang | 
| HADOOP-10702 | KerberosAuthenticationHandler does not log the principal names correctly | Minor | security | Benoy Antony | Benoy Antony | 
| YARN-1885 | RM may not send the app-finished signal after RM restart to some nodes where the application ran before RM restarts | Major | . | Arpit Gupta | Wangda Tan | 
| YARN-2167 | LeveldbIterator should get closed in NMLeveldbStateStoreService#loadLocalizationState() within finally block | Major | nodemanager | Junping Du | Junping Du | 
| HADOOP-10699 | Fix build native library on mac osx | Major | . | Kirill A. Korinskiy | Binglin Chang | 
| MAPREDUCE-5924 | Windows: Sort Job failed due to ‘Invalid event: TA_COMMIT_PENDING at COMMIT_PENDING’ | Major | . | Yesha Vora | Zhijie Shen | 
| HADOOP-10590 | ServiceAuthorizationManager  is not threadsafe | Major | security | Benoy Antony | Benoy Antony | 
| HADOOP-10660 | GraphiteSink should implement Closeable | Major | . | Ted Yu | Chen He | 
| HDFS-6530 | Fix Balancer documentation | Minor | documentation | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | 
| HDFS-6552 | add DN storage to a BlockInfo will not replace the different storage from same DN | Trivial | namenode | Amir Langer | Amir Langer | 
| HDFS-6551 | Rename with OVERWRITE option may throw NPE when the target file/directory is a reference INode | Major | namenode, snapshots | Jing Zhao | Jing Zhao | 
| HDFS-6439 | NFS should not reject NFS requests to the NULL procedure whether port monitoring is enabled or not | Major | nfs | Brandon Li | Aaron T. Myers | 
| HDFS-6559 | Fix wrong option “dfsadmin -rollingUpgrade start” in the document | Minor | documentation | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-10711 | Cleanup some extra dependencies from hadoop-auth | Major | security | Robert Kanter | Robert Kanter | 
| HADOOP-10716 | Cannot use more than 1 har filesystem | Critical | conf, fs | Daryn Sharp | Rushabh S Shah | 
| HDFS-6553 | Add missing DeprecationDeltas for NFS Kerberos configurations | Major | nfs | Stephen Chu | Stephen Chu | 
| HDFS-6563 | NameNode cannot save fsimage in certain circumstances when snapshots are in use | Critical | namenode, snapshots | Aaron T. Myers | Aaron T. Myers | 
| HDFS-3848 | A Bug in recoverLeaseInternal method of FSNameSystem class | Major | namenode | Hooman Peiro Sajjad | Chen He | 
| HDFS-6549 | Add support for accessing the NFS gateway from the AIX NFS client | Major | nfs | Aaron T. Myers | Aaron T. Myers | 
| MAPREDUCE-5844 | Add a configurable delay to reducer-preemption | Major | . | Maysam Yabandeh | Maysam Yabandeh | 
| HDFS-6312 | WebHdfs HA failover is broken on secure clusters | Blocker | webhdfs | Daryn Sharp | Daryn Sharp | 
| HDFS-6535 | HDFS quota update is wrong when file is appended | Major | namenode | George Wong | George Wong | 
| HADOOP-9559 | When metrics system is restarted MBean names get incorrectly flagged as dupes | Major | metrics | Mostafa Elhemali | Mike Liddell | 
| HDFS-6222 | Remove background token renewer from webhdfs | Major | webhdfs | Daryn Sharp | Daryn Sharp | 
| YARN-2187 | FairScheduler: Disable max-AM-share check by default | Major | fairscheduler | Robert Kanter | Robert Kanter | 
| HDFS-6583 | Remove clientNode in FileUnderConstructionFeature | Minor | namenode | Haohui Mai | Haohui Mai | 
| HDFS-6587 | Bug in TestBPOfferService can cause test failure | Major | test | Zhilei Xu | Zhilei Xu | 
| YARN-2191 | Add a test to make sure NM will do application cleanup even if RM restarting happens before application completed | Major | resourcemanager | Wangda Tan | Wangda Tan | 
| YARN-2111 | In FairScheduler.attemptScheduling, we don’t count containers as assigned if they have 0 memory but non-zero cores | Major | scheduler | Sandy Ryza | Sandy Ryza | 
| YARN-2192 | TestRMHA fails when run with a mix of Schedulers | Major | . | Anubhav Dhoot | Anubhav Dhoot | 
| HADOOP-10746 | TestSocketIOWithTimeout#testSocketIOWithTimeout fails on Power PC | Major | test | Jinghui Wang | Jinghui Wang | 
| YARN-2109 | Fix TestRM to work with both schedulers | Major | scheduler | Anubhav Dhoot | Karthik Kambatla | 
| HDFS-6598 | Fix a typo in message issued from explorer.js | Trivial | webhdfs | Yongjun Zhang | Yongjun Zhang | 
| HDFS-6475 | WebHdfs clients fail without retry because incorrect handling of StandbyException | Major | ha, webhdfs | Yongjun Zhang | Yongjun Zhang | 
| HDFS-6527 | Edit log corruption due to defered INode removal | Blocker | . | Kihwal Lee | Kihwal Lee | 
| YARN-2171 | AMs block on the CapacityScheduler lock during allocate() | Critical | capacityscheduler | Jason Lowe | Jason Lowe | 
| HADOOP-9705 | FsShell cp -p does not preserve directory attibutes | Major | fs | Stephen Chu | Akira Ajisaka | 
| MAPREDUCE-5939 | StartTime showing up as the epoch time in JHS UI after upgrade | Major | . | Kihwal Lee | Chen He | 
| HDFS-6572 | Add an option to the NameNode that prints the software and on-disk image versions | Minor | namenode | Charles Lamb | Charles Lamb | 
| YARN-2163 | WebUI: Order of AppId in apps table should be consistent with ApplicationId.compareTo(). | Minor | resourcemanager, webapp | Wangda Tan | Wangda Tan | 
| HADOOP-10701 | NFS should not validate the access premission only based on the user’s primary group | Major | nfs | Premchandra Preetham Kukillaya | Harsh J | 
| YARN-2204 | TestAMRestart#testAMRestartWithExistingContainers assumes CapacityScheduler | Trivial | resourcemanager | Robert Kanter | Robert Kanter | 
| YARN-2104 | Scheduler queue filter failed to work because index of queue column changed | Major | resourcemanager, webapp | Wangda Tan | Wangda Tan | 
| HADOOP-10739 | Renaming a file into a directory containing the same filename results in a confusing I/O error | Major | fs | Jason Lowe | Chang Li | 
| YARN-2201 | TestRMWebServicesAppsModification dependent on yarn-default.xml | Major | . | Ray Chiang | Varun Vasudev | 
| HDFS-6556 | Refine XAttr permissions | Major | namenode | Yi Liu | Uma Maheswara Rao G | 
| HDFS-6601 | Issues in finalizing rolling upgrade when there is a layout version change | Blocker | . | Kihwal Lee | Kihwal Lee | 
| HDFS-6418 | Regression: DFS_NAMENODE_USER_NAME_KEY missing in trunk | Blocker | hdfs-client | Steve Loughran | Tsz Wo Nicholas Sze | 
| HADOOP-10710 | hadoop.auth cookie is not properly constructed according to RFC2109 | Major | security | Alejandro Abdelnur | Juan Yu | 
| HDFS-6591 | while loop is executed tens of thousands of times  in Hedged  Read | Major | hdfs-client | LiuLei | Liang Xie | 
| YARN-2065 | AM cannot create new containers after restart-NM token from previous attempt used | Major | . | Steve Loughran | Jian He | 
| HDFS-6612 | MiniDFSNNTopology#simpleFederatedTopology(int) always hardcode nameservice ID | Minor | . | Juan Yu | Juan Yu | 
| HDFS-6604 | The short-circuit cache doesn’t correctly time out replicas that haven’t been used in a while | Critical | hdfs-client | Giuseppe Reina | Colin P. McCabe | 
| YARN-2241 | ZKRMStateStore: On startup, show nicer messages if znodes already exist | Minor | resourcemanager | Robert Kanter | Robert Kanter | 
| YARN-2232 | ClientRMService doesn’t allow delegation token owner to cancel their own token in secure mode | Major | . | Varun Vasudev | Varun Vasudev | 
| HDFS-6610 | TestShortCircuitLocalRead tests sometimes timeout on slow machines | Minor | test | Charles Lamb | Charles Lamb | 
| HADOOP-10312 | Shell.ExitCodeException to have more useful toString | Minor | util | Steve Loughran | Steve Loughran | 
| HADOOP-10533 | S3 input stream NPEs in MapReduce job | Minor | fs/s3 | Benjamin Kim | Steve Loughran | 
| HADOOP-10419 | BufferedFSInputStream NPEs on getPos() on a closed stream | Minor | fs | Steve Loughran | Steve Loughran | 
| HDFS-6493 | Change dfs.namenode.startup.delay.block.deletion to second instead of millisecond | Trivial | . | Juan Yu | Juan Yu | 
| YARN-2250 | FairScheduler.findLowestCommonAncestorQueue returns null when queues not identical | Major | scheduler | Krisztian Horvath | Krisztian Horvath | 
| MAPREDUCE-5868 | TestPipeApplication causing nightly build to fail | Major | test | Jason Lowe | Akira Ajisaka | 
| MAPREDUCE-5517 | enabling uber mode with 0 reducer still requires mapreduce.reduce.memory.mb to be less than yarn.app.mapreduce.am.resource.mb | Minor | . | Siqi Li | Siqi Li | 
| HADOOP-10801 | Fix dead link in site.xml | Major | documentation | Akira Ajisaka | Akira Ajisaka | 
| HDFS-6618 | FSNamesystem#delete drops the FSN lock between removing INodes from the tree and deleting them from the inode map | Blocker | . | Kihwal Lee | Kihwal Lee | 
| HDFS-6622 | Rename and AddBlock may race and produce invalid edits | Blocker | . | Kihwal Lee | Kihwal Lee | 
| HDFS-6631 | TestPread#testHedgedReadLoopTooManyTimes fails intermittently. | Major | hdfs-client, test | Chris Nauroth | Liang Xie | 
| HDFS-6647 | Edit log corruption when pipeline recovery occurs for deleted file present in snapshot | Blocker | namenode, snapshots | Aaron T. Myers | Kihwal Lee | 
| HDFS-6378 | NFS registration should timeout instead of hanging when portmap/rpcbind is not available | Major | nfs | Brandon Li | Abhiraj Butala | 
| MAPREDUCE-5790 | Default map hprof profile options do not work | Blocker | . | Andrew Wang | Gera Shegalov | 
| HADOOP-10468 | TestMetricsSystemImpl.testMultiThreadedPublish fails intermediately | Blocker | . | Haohui Mai | Akira Ajisaka | 
| MAPREDUCE-5952 | LocalContainerLauncher#renameMapOutputForReduce incorrectly assumes a single dir for mapOutIndex | Blocker | mr-am, mrv2 | Gera Shegalov | Gera Shegalov | 
| HDFS-6599 | 2.4 addBlock is 10 to 20 times slower compared to 0.23 | Blocker | . | Kihwal Lee | Daryn Sharp | 
| HDFS-6632 | Reintroduce dfs.http.port / dfs.https.port in branch-2 | Major | . | Yongjun Zhang | Yongjun Zhang | 
| HDFS-6680 | BlockPlacementPolicyDefault does not choose favored nodes correctly | Major | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | 
| HDFS-6712 | Document HDFS Multihoming Settings | Major | documentation | Arpit Agarwal | Arpit Agarwal | 
| HDFS-6703 | NFS: Files can be deleted from a read-only mount | Major | nfs | Abhiraj Butala | Srikanth Upputuri | 
| HADOOP-10872 | TestPathData fails intermittently with “Mkdirs failed to create d1” | Major | fs | Yongjun Zhang | Yongjun Zhang | 
| HADOOP-10890 | TestDFVariations.testMount fails intermittently | Major | . | Yongjun Zhang | Yongjun Zhang | 
| HDFS-6422 | getfattr in CLI doesn’t throw exception or return non-0 return code when xattr doesn’t exist | Blocker | . | Charles Lamb | Charles Lamb | 
| HDFS-6723 | New NN webUI no longer displays decommissioned state for dead node | Major | . | Ming Ma | Ming Ma | 
| HDFS-6696 | Name node cannot start if the path of a file under construction contains “.snapshot” | Blocker | . | Kihwal Lee | Andrew Wang | 
| HDFS-6752 | Avoid Address bind errors in TestDatanodeConfig#testMemlockLimit | Major | test | Vinayakumar B | Vinayakumar B | 
| YARN-1726 | ResourceSchedulerWrapper broken due to AbstractYarnScheduler | Blocker | . | Wei Yan | Wei Yan | 
| MAPREDUCE-6002 | MR task should prevent report error to AM when process is shutting down | Major | task | Wangda Tan | Wangda Tan | 
| HADOOP-10686 | Writables are not always configured | Major | . | Abraham Elmahrek | Abraham Elmahrek | 
| HADOOP-10910 | Increase findbugs maxHeap size | Blocker | . | Andrew Wang | Andrew Wang | 
| HDFS-6793 | Missing changes in HftpFileSystem when Reintroduce dfs.http.port / dfs.https.port in branch-2 | Blocker | . | Juan Yu | Juan Yu | 
| HADOOP-10589 | NativeS3FileSystem throw NullPointerException when the file is empty | Major | fs/s3 | shuisheng wei | Steve Loughran | 
| HADOOP-10737 | S3n silent failure on copy, data loss on rename | Major | fs/s3 | Gian Merlino | Steve Loughran |