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