| HADOOP-12577 | Bump up commons-collections version to 3.2.2 to address a security flaw | Blocker | build, security | Wei-Chiu Chuang | Wei-Chiu Chuang |
| HADOOP-12526 | [Branch-2] there are duplicate dependency definitions in pom's | Major | build | Sangjin Lee | Sangjin Lee |
| HADOOP-12230 | hadoop-project declares duplicate, conflicting curator dependencies | Minor | build | Steve Loughran | Rakesh R |
| HADOOP-11267 | TestSecurityUtil fails when run with JDK8 because of empty principal names | Minor | security, test | Stephen Chu | Stephen Chu |
| HADOOP-10134 | [JDK8] Fix Javadoc errors caused by incorrect or illegal tags in doc comments | Minor | . | Andrew Purtell | Andrew Purtell |
| HADOOP-9242 | Duplicate surefire plugin config in hadoop-common | Major | test | Andrey Klochkov | Andrey Klochkov |
| HDFS-9470 | Encryption zone on root not loaded from fsimage after NN restart | Critical | . | Xiao Chen | Xiao Chen |
| HDFS-9431 | DistributedFileSystem#concat fails if the target path is relative. | Major | hdfs-client | Kazuho Fujii | Kazuho Fujii |
| HDFS-9289 | Make DataStreamer#block thread safe and verify genStamp in commitBlock | Critical | . | Chang Li | Chang Li |
| HDFS-9273 | ACLs on root directory may be lost after NN restart | Critical | namenode | Xiao Chen | Xiao Chen |
| HDFS-9083 | Replication violates block placement policy. | Blocker | namenode | Rushabh S Shah | Rushabh S Shah |
| HDFS-8615 | Correct HTTP method in WebHDFS document | Major | documentation | Akira AJISAKA | Brahma Reddy Battula |
| MAPREDUCE-6549 | multibyte delimiters with LineRecordReader cause duplicate records | Major | mrv1, mrv2 | Dustin Cote | Wilfred Spiegelenburg |
| MAPREDUCE-6540 | TestMRTimelineEventHandling fails | Major | test | Sangjin Lee | Sangjin Lee |
| MAPREDUCE-6528 | Memory leak for HistoryFileManager.getJobSummary() | Critical | jobhistoryserver | Junping Du | Junping Du |
| MAPREDUCE-6481 | LineRecordReader may give incomplete record and wrong position/key information for uncompressed input sometimes. | Critical | mrv2 | zhihai xu | zhihai xu |
| MAPREDUCE-6377 | JHS sorting on state column not working in webUi | Minor | jobhistoryserver | Bibin A Chundatt | zhihai xu |
| MAPREDUCE-6273 | HistoryFileManager should check whether summaryFile exists to avoid FileNotFoundException causing HistoryFileInfo into MOVE_FAILED state | Minor | jobhistoryserver | zhihai xu | zhihai xu |
| MAPREDUCE-5948 | org.apache.hadoop.mapred.LineRecordReader does not handle multibyte record delimiters well | Critical | . | Kris Geusebroek | Akira AJISAKA |
| MAPREDUCE-5883 | “Total megabyte-seconds” in job counters is slightly misleading | Minor | . | Nathan Roberts | Nathan Roberts |
| YARN-4434 | NodeManager Disk Checker parameter documentation is not correct | Minor | documentation, nodemanager | Takashi Ohnishi | Weiwei Yang |
| YARN-4424 | Fix deadlock in RMAppImpl | Blocker | . | Yesha Vora | Jian He |
| YARN-4365 | FileSystemNodeLabelStore should check for root dir existence on startup | Major | resourcemanager | Jason Lowe | Kuhu Shukla |
| YARN-4348 | ZKRMStateStore.syncInternal shouldn‘t wait for sync completion for avoiding blocking ZK’s event thread | Blocker | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa |
| YARN-4344 | NMs reconnecting with changed capabilities can lead to wrong cluster resource calculations | Critical | resourcemanager | Varun Vasudev | Varun Vasudev |
| YARN-4326 | Fix TestDistributedShell timeout as AHS in MiniYarnCluster no longer binds to default port 8188 | Major | . | MENG DING | MENG DING |
| YARN-4320 | TestJobHistoryEventHandler fails as AHS in MiniYarnCluster no longer binds to default port 8188 | Major | . | Varun Saxena | Varun Saxena |
| YARN-4312 | TestSubmitApplicationWithRMHA fails on branch-2.7 and branch-2.6 as some of the test cases time out | Major | . | Varun Saxena | Varun Saxena |
| YARN-4241 | Fix typo of property name in yarn-default.xml | Major | documentation | Anthony Rojas | Anthony Rojas |
| YARN-3925 | ContainerLogsUtils#getContainerLogFile fails to read container log files from full disks. | Critical | nodemanager | zhihai xu | zhihai xu |
| YARN-3878 | AsyncDispatcher can hang while stopping if it is configured for draining events on stop | Critical | . | Varun Saxena | Varun Saxena |
| YARN-2859 | ApplicationHistoryServer binds to default port 8188 in MiniYARNCluster | Critical | timelineserver | Hitesh Shah | Vinod Kumar Vavilapalli |