| HADOOP-11934 | Use of JavaKeyStoreProvider in LdapGroupsMapping causes infinite loop | Blocker | security | Mike Yoder | Larry McCay |
| HADOOP-11932 | MetricsSinkAdapter hangs when being stopped | Critical | . | Jian He | Brahma Reddy Battula |
| HADOOP-11802 | DomainSocketWatcher thread terminates sometimes after there is an I/O error during requestShortCircuitShm | Major | . | Eric Payne | Colin Patrick McCabe |
| HADOOP-11730 | Regression: s3n read failure recovery broken | Major | fs/s3 | Takenori Sato | Takenori Sato |
| HADOOP-11674 | oneByteBuf in CryptoInputStream and CryptoOutputStream should be non static | Critical | io | Sean Busbey | Sean Busbey |
| HADOOP-11604 | Prevent ConcurrentModificationException while closing domain sockets during shutdown of DomainSocketWatcher thread. | Critical | net | Liang Xie | Chris Nauroth |
| HADOOP-11491 | HarFs incorrectly declared as requiring an authority | Critical | fs | Gera Shegalov | Brahma Reddy Battula |
| HADOOP-11482 | Use correct UGI when KMSClientProvider is called by a proxy user | Major | . | Arun Suresh | Arun Suresh |
| HADOOP-11368 | Fix SSLFactory truststore reloader thread leak in KMSClientProvider | Major | kms | Arun Suresh | Arun Suresh |
| HADOOP-11350 | The size of header buffer of HttpServer is too small when HTTPS is enabled | Major | security | Benoy Antony | Benoy Antony |
| HADOOP-11343 | Overflow is not properly handled in caclulating final iv for AES CTR | Blocker | security | Jerry Chen | Jerry Chen |
| HADOOP-11333 | Fix deadlock in DomainSocketWatcher when the notification pipe is full | Major | . | zhaoyunjiong | zhaoyunjiong |
| HADOOP-11316 | “mvn package -Pdist,docs -DskipTests -Dtar” fails because of non-ascii characters | Blocker | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa |
| HADOOP-11295 | RPC Server Reader thread can't shutdown if RPCCallQueue is full | Major | . | Ming Ma | Ming Ma |
| HADOOP-11238 | Update the NameNode's Group Cache in the background when possible | Minor | . | Chris Li | Chris Li |
| HADOOP-10786 | Fix UGI#reloginFromKeytab on Java 8 | Major | security | Tobi Vollebregt | Stephen Chu |
| HADOOP-8151 | Error handling in snappy decompressor throws invalid exceptions | Major | io, native | Todd Lipcon | Matt Foley |
| HDFS-8863 | The remaining space check in BlockPlacementPolicyDefault is flawed | Critical | . | Kihwal Lee | Kihwal Lee |
| HDFS-8846 | Add a unit test for INotify functionality across a layout version upgrade | Major | namenode | Zhe Zhang | Zhe Zhang |
| HDFS-8486 | DN startup may cause severe data loss | Blocker | datanode | Daryn Sharp | Daryn Sharp |
| HDFS-8480 | Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve old edit logs instead of copying them | Critical | . | Zhe Zhang | Zhe Zhang |
| HDFS-8431 | hdfs crypto class not found in Windows | Critical | scripts | Sumana Sathish | Anu Engineer |
| HDFS-8404 | Pending block replication can get stuck using older genstamp | Major | namenode | Nathan Roberts | Nathan Roberts |
| HDFS-8270 | create() always retried with hardcoded timeout when file already exists with open lease | Major | hdfs-client | Andrey Stepachev | J.Andreina |
| HDFS-8245 | Standby namenode doesn't process DELETED_BLOCK if the add block request is in edit log. | Major | . | Rushabh S Shah | Rushabh S Shah |
| HDFS-8219 | setStoragePolicy with folder behavior is different after cluster restart | Major | . | Peter Shi | Surendra Singh Lilhore |
| HDFS-8127 | NameNode Failover during HA upgrade can cause DataNode to finalize upgrade | Blocker | ha | Jing Zhao | Jing Zhao |
| HDFS-8072 | Reserved RBW space is not released if client terminates while writing block | Major | datanode | Arpit Agarwal | Arpit Agarwal |
| HDFS-8070 | Pre-HDFS-7915 DFSClient cannot use short circuit on post-HDFS-7915 DataNode | Blocker | caching | Gopal V | Colin Patrick McCabe |
| HDFS-8046 | Allow better control of getContentSummary | Major | . | Kihwal Lee | Kihwal Lee |
| HDFS-7999 | FsDatasetImpl#createTemporary sometimes holds the FSDatasetImpl lock for a very long time | Major | . | zhouyingchao | zhouyingchao |
| HDFS-7980 | Incremental BlockReport will dramatically slow down the startup of a namenode | Major | . | Hui Zheng | Walter Su |
| HDFS-7960 | The full block report should prune zombie storages even if they're not empty | Critical | . | Lei (Eddy) Xu | Colin Patrick McCabe |
| HDFS-7930 | commitBlockSynchronization() does not remove locations | Blocker | namenode | Konstantin Shvachko | Yi Liu |
| HDFS-7929 | inotify unable fetch pre-upgrade edit log segments once upgrade starts | Major | . | Zhe Zhang | Zhe Zhang |
| HDFS-7915 | The DataNode can sometimes allocate a ShortCircuitShm slot and fail to tell the DFSClient about it because of a network error | Major | . | Colin Patrick McCabe | Colin Patrick McCabe |
| HDFS-7894 | Rolling upgrade readiness is not updated in jmx until query command is issued. | Critical | . | Kihwal Lee | Brahma Reddy Battula |
| HDFS-7885 | Datanode should not trust the generation stamp provided by client | Critical | datanode | vitthal (Suhas) Gogate | Tsz Wo Nicholas Sze |
| HDFS-7884 | NullPointerException in BlockSender | Blocker | datanode | Tsz Wo Nicholas Sze | Brahma Reddy Battula |
| HDFS-7871 | NameNodeEditLogRoller can keep printing “Swallowing exception” message | Critical | . | Jing Zhao | Jing Zhao |
| HDFS-7830 | DataNode does not release the volume lock when adding a volume fails. | Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu |
| HDFS-7788 | Post-2.6 namenode may not start up with an image containing inodes created with an old release. | Blocker | . | Kihwal Lee | Rushabh S Shah |
| HDFS-7763 | fix zkfc hung issue due to not catching exception in a corner case | Major | ha | Liang Xie | Liang Xie |
| HDFS-7742 | favoring decommissioning node for replication can cause a block to stay underreplicated for long periods | Major | namenode | Nathan Roberts | Nathan Roberts |
| HDFS-7733 | NFS: readdir/readdirplus return null directory attribute on failure | Major | nfs | Arpit Agarwal | Arpit Agarwal |
| HDFS-7714 | Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode. | Major | datanode | Chris Nauroth | Vinayakumar B |
| HDFS-7707 | Edit log corruption due to delayed block removal again | Major | namenode | Yongjun Zhang | Yongjun Zhang |
| HDFS-7610 | Fix removal of dynamically added DN volumes | Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu |
| HDFS-7609 | Avoid retry cache collision when Standby NameNode loading edits | Critical | namenode | Carrey Zhan | Ming Ma |
| HDFS-7596 | NameNode should prune dead storages from storageMap | Major | namenode | Arpit Agarwal | Arpit Agarwal |
| HDFS-7587 | Edit log corruption can happen if append fails with a quota violation | Blocker | namenode | Kihwal Lee | Jing Zhao |
| HDFS-7575 | Upgrade should generate a unique storage ID for each volume | Critical | . | Lars Francke | Arpit Agarwal |
| HDFS-7552 | change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration | Major | datanode, test | Liang Xie | Liang Xie |
| HDFS-7533 | Datanode sometimes does not shutdown on receiving upgrade shutdown command | Major | . | Kihwal Lee | Eric Payne |
| HDFS-7503 | Namenode restart after large deletions can cause slow processReport (due to logging) | Major | namenode | Arpit Agarwal | Arpit Agarwal |
| HDFS-7489 | Incorrect locking in FsVolumeList#checkDirs can hang datanodes | Critical | datanode | Noah Lorang | Noah Lorang |
| HDFS-7470 | SecondaryNameNode need twice memory when calling reloadFromImageFile | Major | namenode | zhaoyunjiong | zhaoyunjiong |
| HDFS-7443 | Datanode upgrade to BLOCKID_BASED_LAYOUT fails if duplicate block files are present in the same volume | Blocker | . | Kihwal Lee | Colin Patrick McCabe |
| HDFS-7425 | NameNode block deletion logging uses incorrect appender. | Minor | namenode | Chris Nauroth | Chris Nauroth |
| HDFS-7263 | Snapshot read can reveal future bytes for appended files. | Major | hdfs-client | Konstantin Shvachko | Tao Luo |
| HDFS-7235 | DataNode#transferBlock should report blocks that don't exist using reportBadBlock | Major | datanode, namenode | Yongjun Zhang | Yongjun Zhang |
| HDFS-7225 | Remove stale block invalidation work when DN re-registers with different UUID | Major | namenode | Zhe Zhang | Zhe Zhang |
| HDFS-7213 | processIncrementalBlockReport performance degradation | Critical | namenode | Daryn Sharp | Eric Payne |
| HDFS-7009 | Active NN and standby NN have different live nodes | Major | datanode | Ming Ma | Ming Ma |
| HDFS-4882 | Prevent the Namenode's LeaseManager from looping forever in checkLeases | Critical | hdfs-client, namenode | Zesheng Wu | Ravi Prakash |
| HDFS-3443 | Fix NPE when namenode transition to active during startup by adding checkNNStartup() in NameNodeRpcServer | Major | auto-failover, ha | suja s | Vinayakumar B |
| MAPREDUCE-6361 | NPE issue in shuffle caused by concurrent issue between copySucceeded() in one thread and copyFailed() in another thread on the same host | Critical | . | Junping Du | Junping Du |
| MAPREDUCE-6324 | Uber jobs fail to update AMRM token when it rolls over | Blocker | mr-am | Jason Lowe | Jason Lowe |
| MAPREDUCE-6303 | Read timeout when retrying a fetch error can be fatal to a reducer | Blocker | . | Jason Lowe | Jason Lowe |
| MAPREDUCE-6300 | Task list sort by task id broken | Minor | . | Siqi Li | Siqi Li |
| MAPREDUCE-6238 | MR2 can't run local jobs with -libjars command options which is a regression from MR1 | Critical | mrv2 | zhihai xu | zhihai xu |
| MAPREDUCE-6237 | Multiple mappers with DBInputFormat don't work because of reusing conections | Major | mrv2 | Kannan Rajah | Kannan Rajah |
| MAPREDUCE-6230 | MR AM does not survive RM restart if RM activated a new AMRM secret key | Blocker | mr-am | Jason Lowe | Jason Lowe |
| MAPREDUCE-6166 | Reducers do not validate checksum of map outputs when fetching directly to disk | Major | mrv2 | Eric Payne | Eric Payne |
| MAPREDUCE-5649 | Reduce cannot use more than 2G memory for the final merge | Major | mrv2 | stanley shi | Gera Shegalov |
| YARN-4047 | ClientRMService getApplications has high scheduler lock contention | Major | resourcemanager | Jason Lowe | Jason Lowe |
| YARN-3999 | RM hangs on draining events | Major | . | Jian He | Jian He |
| YARN-3990 | AsyncDispatcher may overloaded with RMAppNodeUpdateEvent when Node is connected/disconnected | Critical | resourcemanager | Rohith Sharma K S | Bibin A Chundatt |
| YARN-3850 | NM fails to read files from full disks which can lead to container logs being lost and other issues | Blocker | log-aggregation, nodemanager | Varun Saxena | Varun Saxena |
| YARN-3832 | Resource Localization fails on a cluster due to existing cache directories | Critical | nodemanager | Ranga Swamy | Brahma Reddy Battula |
| YARN-3733 | Fix DominantRC#compare() does not work as expected if cluster resource is empty | Blocker | resourcemanager | Bibin A Chundatt | Rohith Sharma K S |
| YARN-3725 | App submission via REST API is broken in secure mode due to Timeline DT service address is empty | Blocker | resourcemanager, timelineserver | Zhijie Shen | Zhijie Shen |
| YARN-3585 | NodeManager cannot exit on SHUTDOWN event triggered and NM recovery is enabled | Critical | . | Peng Zhang | Rohith Sharma K S |
| YARN-3526 | ApplicationMaster tracking URL is incorrectly redirected on a QJM cluster | Major | resourcemanager, webapp | Weiwei Yang | Weiwei Yang |
| YARN-3493 | RM fails to come up with error “Failed to load/recover state” when mem settings are changed | Critical | yarn | Sumana Sathish | Jian He |
| YARN-3464 | Race condition in LocalizerRunner kills localizer before localizing all resources | Critical | nodemanager | zhihai xu | zhihai xu |
| YARN-3393 | Getting application(s) goes wrong when app finishes before starting the attempt | Critical | timelineserver | Zhijie Shen | Zhijie Shen |
| YARN-3369 | Missing NullPointer check in AppSchedulingInfo causes RM to die | Blocker | resourcemanager | Giovanni Matteo Fumarola | Brahma Reddy Battula |
| YARN-3287 | TimelineClient kerberos authentication failure uses wrong login context. | Major | . | Jonathan Eagles | Daryn Sharp |
| YARN-3267 | Timelineserver applies the ACL rules after applying the limit on the number of records | Major | . | Prakash Ramachandran | Chang Li |
| YARN-3251 | Fix CapacityScheduler deadlock when computing absolute max avail capacity (short term fix for 2.6.1) | Blocker | . | Jason Lowe | Craig Welch |
| YARN-3242 | Asynchrony in ZK-close can lead to ZKRMStateStore watcher receiving events for old client | Critical | resourcemanager | zhihai xu | zhihai xu |
| YARN-3239 | WebAppProxy does not support a final tracking url which has query fragments and params | Major | . | Hitesh Shah | Jian He |
| YARN-3238 | Connection timeouts to nodemanagers are retried at multiple levels | Blocker | . | Jason Lowe | Jason Lowe |
| YARN-3231 | FairScheduler: Changing queueMaxRunningApps interferes with pending jobs | Critical | . | Siqi Li | Siqi Li |
| YARN-3227 | Timeline renew delegation token fails when RM user's TGT is expired | Critical | . | Jonathan Eagles | Zhijie Shen |
| YARN-3222 | RMNodeImpl#ReconnectNodeTransition should send scheduler events in sequential order | Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
| YARN-3207 | secondary filter matches entites which do not have the key being filtered for. | Major | timelineserver | Prakash Ramachandran | Zhijie Shen |
| YARN-3103 | AMRMClientImpl does not update AMRM token properly | Blocker | client | Jason Lowe | Jason Lowe |
| YARN-3094 | reset timer for liveness monitors after RM recovery | Major | resourcemanager | Jun Gong | Jun Gong |
| YARN-3055 | The token is not renewed properly if it's shared by jobs (oozie) in DelegationTokenRenewer | Blocker | security | Yi Liu | Daryn Sharp |
| YARN-3024 | LocalizerRunner should give DIE action when all resources are localized | Major | nodemanager | Chengbing Liu | Chengbing Liu |
| YARN-2997 | NM keeps sending already-sent completed containers to RM until containers are removed from context | Major | nodemanager | Chengbing Liu | Chengbing Liu |
| YARN-2992 | ZKRMStateStore crashes due to session expiry | Blocker | resourcemanager | Karthik Kambatla | Karthik Kambatla |
| YARN-2978 | ResourceManager crashes with NPE while getting queue info | Critical | . | Jason Tufo | Varun Saxena |
| YARN-2964 | RM prematurely cancels tokens for jobs that submit jobs (oozie) | Blocker | resourcemanager | Daryn Sharp | Jian He |
| YARN-2952 | Incorrect version check in RMStateStore | Major | . | Jian He | Rohith Sharma K S |
| YARN-2922 | ConcurrentModificationException in CapacityScheduler's LeafQueue | Major | capacityscheduler, resourcemanager, scheduler | Jason Tufo | Rohith Sharma K S |
| YARN-2917 | Potential deadlock in AsyncDispatcher when system.exit called in AsyncDispatcher#dispatch and AsyscDispatcher#serviceStop from shutdown hook | Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
| YARN-2910 | FSLeafQueue can throw ConcurrentModificationException | Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
| YARN-2906 | CapacitySchedulerPage shows HTML tags for a queue's Active Users | Major | capacityscheduler | Jason Lowe | Jason Lowe |
| YARN-2905 | AggregatedLogsBlock page can infinitely loop if the aggregated log file is corrupted | Blocker | . | Jason Lowe | Varun Saxena |
| YARN-2894 | When ACL's are enabled, if RM switches then application can not be viewed from web. | Major | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
| YARN-2890 | MiniYarnCluster should turn on timeline service if configured to do so | Major | . | Mit Desai | Mit Desai |
| YARN-2874 | Dead lock in “DelegationTokenRenewer” which blocks RM to execute any further apps | Blocker | resourcemanager | Naganarasimha G R | Naganarasimha G R |
| YARN-2865 | Application recovery continuously fails with “Application with id already present. Cannot duplicate” | Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
| YARN-2856 | Application recovery throw InvalidStateTransitonException: Invalid event: ATTEMPT_KILLED at ACCEPTED | Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
| YARN-2816 | NM fail to start with NPE during container recovery | Major | nodemanager | zhihai xu | zhihai xu |
| YARN-2637 | maximum-am-resource-percent could be respected for both LeafQueue/User when trying to activate applications. | Critical | resourcemanager | Wangda Tan | Craig Welch |
| YARN-2414 | RM web UI: app page will crash if app is failed before any attempt has been created | Major | webapp | Zhijie Shen | Wangda Tan |
| YARN-2340 | NPE thrown when RM restart after queue is STOPPED. There after RM can not recovery application's and remain in standby | Critical | resourcemanager, scheduler | Nishan Shetty | Rohith Sharma K S |
| YARN-2246 | Job History Link in RM UI is redirecting to the URL which contains Job Id twice | Major | webapp | Devaraj K | Devaraj K |