http://git-wip-us.apache.org/repos/asf/hadoop/blob/d8e6d6df/hadoop-common-project/hadoop-common/src/site/markdown/release/2.8.0/CHANGES.2.8.0.md ---------------------------------------------------------------------- diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.8.0/CHANGES.2.8.0.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.8.0/CHANGES.2.8.0.md new file mode 100644 index 0000000..7f9bff2 --- /dev/null +++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.8.0/CHANGES.2.8.0.md @@ -0,0 +1,2986 @@ + +<!--- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +--> +# "Apache Hadoop" Changelog + +## Release 2.8.0 - 2017-03-17 + +### INCOMPATIBLE CHANGES: + +| JIRA | Summary | Priority | Component | Reporter | Contributor | +|:---- |:---- | :--- |:---- |:---- |:---- | +| [YARN-3241](https://issues.apache.org/jira/browse/YARN-3241) | FairScheduler handles "invalid" queue names inconsistently | Major | fairscheduler | zhihai xu | zhihai xu | +| [HADOOP-11731](https://issues.apache.org/jira/browse/HADOOP-11731) | Rework the changelog and releasenotes | Major | documentation | Allen Wittenauer | Allen Wittenauer | +| [HADOOP-11746](https://issues.apache.org/jira/browse/HADOOP-11746) | rewrite test-patch.sh | Major | build, test | Allen Wittenauer | Allen Wittenauer | +| [HDFS-8226](https://issues.apache.org/jira/browse/HDFS-8226) | Non-HA rollback compatibility broken | Blocker | . | J.Andreina | J.Andreina | +| [HADOOP-11772](https://issues.apache.org/jira/browse/HADOOP-11772) | RPC Invoker relies on static ClientCache which has synchronized(this) blocks | Major | ipc, performance | Gopal V | Haohui Mai | +| [YARN-2336](https://issues.apache.org/jira/browse/YARN-2336) | Fair scheduler REST api returns a missing '[' bracket JSON for deep queue tree | Major | fairscheduler | Kenji Kikushima | Akira Ajisaka | +| [YARN-41](https://issues.apache.org/jira/browse/YARN-41) | The RM should handle the graceful shutdown of the NM. | Major | nodemanager, resourcemanager | Ravi Teja Ch N V | Devaraj K | +| [HDFS-6564](https://issues.apache.org/jira/browse/HDFS-6564) | Use slf4j instead of common-logging in hdfs-client | Major | build | Haohui Mai | Rakesh R | +| [MAPREDUCE-6427](https://issues.apache.org/jira/browse/MAPREDUCE-6427) | Fix typo in JobHistoryEventHandler | Minor | . | Brahma Reddy Battula | Ray Chiang | +| [HADOOP-12269](https://issues.apache.org/jira/browse/HADOOP-12269) | Update aws-sdk dependency to 1.10.6; move to aws-sdk-s3 | Major | fs/s3 | Thomas Demoor | Thomas Demoor | +| [HDFS-8900](https://issues.apache.org/jira/browse/HDFS-8900) | Compact XAttrs to optimize memory footprint. | Major | namenode | Yi Liu | Yi Liu | +| [YARN-4087](https://issues.apache.org/jira/browse/YARN-4087) | Followup fixes after YARN-2019 regarding RM behavior when state-store error occurs | Major | . | Jian He | Jian He | +| [HADOOP-12416](https://issues.apache.org/jira/browse/HADOOP-12416) | Trash messages should be handled by Logger instead of being delivered on System.out | Major | trash | Ashutosh Chauhan | Mingliang Liu | +| [HDFS-9063](https://issues.apache.org/jira/browse/HDFS-9063) | Correctly handle snapshot path for getContentSummary | Major | namenode | Jing Zhao | Jing Zhao | +| [HDFS-9433](https://issues.apache.org/jira/browse/HDFS-9433) | DFS getEZForPath API on a non-existent file should throw FileNotFoundException | Major | encryption | Rakesh R | Rakesh R | +| [HADOOP-11252](https://issues.apache.org/jira/browse/HADOOP-11252) | RPC client does not time out by default | Critical | ipc | Wilfred Spiegelenburg | Masatake Iwasaki | +| [HDFS-9047](https://issues.apache.org/jira/browse/HDFS-9047) | Retire libwebhdfs | Major | webhdfs | Allen Wittenauer | Haohui Mai | +| [HADOOP-12651](https://issues.apache.org/jira/browse/HADOOP-12651) | Replace dev-support with wrappers to Yetus | Major | scripts | Allen Wittenauer | Allen Wittenauer | +| [HADOOP-12552](https://issues.apache.org/jira/browse/HADOOP-12552) | Fix undeclared/unused dependency to httpclient | Minor | build | Masatake Iwasaki | Masatake Iwasaki | +| [HADOOP-11792](https://issues.apache.org/jira/browse/HADOOP-11792) | Remove all of the CHANGES.txt files | Major | build | Allen Wittenauer | Andrew Wang | +| [YARN-5035](https://issues.apache.org/jira/browse/YARN-5035) | FairScheduler: Adjust maxAssign dynamically when assignMultiple is turned on | Major | fairscheduler | Karthik Kambatla | Karthik Kambatla | +| [HADOOP-12892](https://issues.apache.org/jira/browse/HADOOP-12892) | fix/rewrite create-release | Blocker | build | Allen Wittenauer | Allen Wittenauer | +| [HADOOP-13139](https://issues.apache.org/jira/browse/HADOOP-13139) | Branch-2: S3a to use thread pool that blocks clients | Major | fs/s3 | Pieter Reuse | Pieter Reuse | +| [HADOOP-13382](https://issues.apache.org/jira/browse/HADOOP-13382) | remove unneeded commons-httpclient dependencies from POM files in Hadoop and sub-projects | Major | build | Matt Foley | Matt Foley | +| [HDFS-7933](https://issues.apache.org/jira/browse/HDFS-7933) | fsck should also report decommissioning replicas. | Major | namenode | Jitendra Nath Pandey | Xiaoyu Yao | +| [HADOOP-13560](https://issues.apache.org/jira/browse/HADOOP-13560) | S3ABlockOutputStream to support huge (many GB) file writes | Major | fs/s3 | Steve Loughran | Steve Loughran | +| [HDFS-11048](https://issues.apache.org/jira/browse/HDFS-11048) | Audit Log should escape control characters | Major | . | Eric Badger | Eric Badger | +| [HADOOP-13812](https://issues.apache.org/jira/browse/HADOOP-13812) | Upgrade Tomcat to 6.0.48 | Blocker | kms | John Zhuge | John Zhuge | +| [HADOOP-13929](https://issues.apache.org/jira/browse/HADOOP-13929) | ADLS connector should not check in contract-test-options.xml | Major | fs/adl, test | John Zhuge | John Zhuge | + + +### IMPORTANT ISSUES: + +| JIRA | Summary | Priority | Component | Reporter | Contributor | +|:---- |:---- | :--- |:---- |:---- |:---- | +| [YARN-4785](https://issues.apache.org/jira/browse/YARN-4785) | inconsistent value type of the "type" field for LeafQueueInfo in response of RM REST API - cluster/scheduler | Major | webapp | Jayesh | Varun Vasudev | + + +### NEW FEATURES: + +| JIRA | Summary | Priority | Component | Reporter | Contributor | +|:---- |:---- | :--- |:---- |:---- |:---- | +| [HADOOP-8934](https://issues.apache.org/jira/browse/HADOOP-8934) | Shell command ls should include sort options | Minor | fs | Jonathan Allen | Jonathan Allen | +| [HADOOP-9477](https://issues.apache.org/jira/browse/HADOOP-9477) | Add posixGroups support for LDAP groups mapping service | Major | . | Kai Zheng | Dapeng Sun | +| [HDFS-8009](https://issues.apache.org/jira/browse/HDFS-8009) | Signal congestion on the DataNode | Major | datanode | Haohui Mai | Haohui Mai | +| [YARN-2901](https://issues.apache.org/jira/browse/YARN-2901) | Add errors and warning metrics page to RM, NM web UI | Major | nodemanager, resourcemanager | Varun Vasudev | Varun Vasudev | +| [HDFS-7891](https://issues.apache.org/jira/browse/HDFS-7891) | A block placement policy with best rack failure tolerance | Minor | namenode | Walter Su | Walter Su | +| [HADOOP-11843](https://issues.apache.org/jira/browse/HADOOP-11843) | Make setting up the build environment easier | Major | build | Niels Basjes | Niels Basjes | +| [MAPREDUCE-6284](https://issues.apache.org/jira/browse/MAPREDUCE-6284) | Add Task Attempt State API to MapReduce Application Master REST API | Minor | . | Ryu Kobayashi | Ryu Kobayashi | +| [HADOOP-10971](https://issues.apache.org/jira/browse/HADOOP-10971) | Add -C flag to make `hadoop fs -ls` print filenames only | Major | fs | Ryan Williams | Kengo Seki | +| [MAPREDUCE-6364](https://issues.apache.org/jira/browse/MAPREDUCE-6364) | Add a "Kill" link to Task Attempts page | Minor | applicationmaster | Ryu Kobayashi | Ryu Kobayashi | +| [MAPREDUCE-6304](https://issues.apache.org/jira/browse/MAPREDUCE-6304) | Specifying node labels when submitting MR jobs | Major | . | Jian Fang | Naganarasimha G R | +| [HDFS-8487](https://issues.apache.org/jira/browse/HDFS-8487) | Generalize BlockInfo in preparation of merging HDFS-7285 into trunk and branch-2 | Major | namenode | Zhe Zhang | Zhe Zhang | +| [HDFS-8608](https://issues.apache.org/jira/browse/HDFS-8608) | Merge HDFS-7912 to trunk and branch-2 (track BlockInfo instead of Block in UnderReplicatedBlocks and PendingReplicationBlocks) | Major | . | Zhe Zhang | Zhe Zhang | +| [HADOOP-5732](https://issues.apache.org/jira/browse/HADOOP-5732) | Add SFTP FileSystem | Minor | fs | Ãñigo Goiri | ramtin | +| [HDFS-8622](https://issues.apache.org/jira/browse/HDFS-8622) | Implement GETCONTENTSUMMARY operation for WebImageViewer | Major | . | Jagadesh Kiran N | Jagadesh Kiran N | +| [HDFS-8155](https://issues.apache.org/jira/browse/HDFS-8155) | Support OAuth2 in WebHDFS | Major | webhdfs | Jakob Homan | Jakob Homan | +| [MAPREDUCE-6415](https://issues.apache.org/jira/browse/MAPREDUCE-6415) | Create a tool to combine aggregated logs into HAR files | Major | . | Robert Kanter | Robert Kanter | +| [HADOOP-12360](https://issues.apache.org/jira/browse/HADOOP-12360) | Create StatsD metrics2 sink | Minor | metrics | Dave Marion | Dave Marion | +| [YARN-261](https://issues.apache.org/jira/browse/YARN-261) | Ability to fail AM attempts | Major | api | Jason Lowe | Rohith Sharma K S | +| [HDFS-9184](https://issues.apache.org/jira/browse/HDFS-9184) | Logging HDFS operation's caller context into audit logs | Major | . | Mingliang Liu | Mingliang Liu | +| [HDFS-9057](https://issues.apache.org/jira/browse/HDFS-9057) | allow/disallow snapshots via webhdfs | Major | webhdfs | Allen Wittenauer | Brahma Reddy Battula | +| [YARN-4349](https://issues.apache.org/jira/browse/YARN-4349) | Support CallerContext in YARN | Major | . | Wangda Tan | Wangda Tan | +| [YARN-3623](https://issues.apache.org/jira/browse/YARN-3623) | We should have a config to indicate the Timeline Service version | Major | timelineserver | Zhijie Shen | Xuan Gong | +| [HADOOP-12657](https://issues.apache.org/jira/browse/HADOOP-12657) | Add a option to skip newline on empty files with getMerge -nl | Minor | . | Jan Filipiak | Kanaka Kumar Avvaru | +| [YARN-3458](https://issues.apache.org/jira/browse/YARN-3458) | CPU resource monitoring in Windows | Minor | nodemanager | Inigo Goiri | Inigo Goiri | +| [HADOOP-12691](https://issues.apache.org/jira/browse/HADOOP-12691) | Add CSRF Filter for REST APIs to Hadoop Common | Major | security | Larry McCay | Larry McCay | +| [HADOOP-12635](https://issues.apache.org/jira/browse/HADOOP-12635) | Adding Append API support for WASB | Major | fs/azure | Dushyanth | Dushyanth | +| [HADOOP-12426](https://issues.apache.org/jira/browse/HADOOP-12426) | Add Entry point for Kerberos health check | Minor | security | Steve Loughran | Steve Loughran | +| [HDFS-9244](https://issues.apache.org/jira/browse/HDFS-9244) | Support nested encryption zones | Major | encryption | Xiaoyu Yao | Zhe Zhang | +| [HADOOP-12548](https://issues.apache.org/jira/browse/HADOOP-12548) | Read s3a creds from a Credential Provider | Major | fs/s3 | Allen Wittenauer | Larry McCay | +| [HDFS-9711](https://issues.apache.org/jira/browse/HDFS-9711) | Integrate CSRF prevention filter in WebHDFS. | Major | datanode, namenode, webhdfs | Chris Nauroth | Chris Nauroth | +| [HDFS-9835](https://issues.apache.org/jira/browse/HDFS-9835) | OIV: add ReverseXML processor which reconstructs an fsimage from an XML file | Major | tools | Colin P. McCabe | Colin P. McCabe | +| [HDFS-9239](https://issues.apache.org/jira/browse/HDFS-9239) | DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness | Major | datanode, namenode | Chris Nauroth | Chris Nauroth | +| [HADOOP-12909](https://issues.apache.org/jira/browse/HADOOP-12909) | Change ipc.Client to support asynchronous calls | Major | ipc | Tsz Wo Nicholas Sze | Xiaobing Zhou | +| [HDFS-9945](https://issues.apache.org/jira/browse/HDFS-9945) | Datanode command for evicting writers | Major | datanode | Kihwal Lee | Kihwal Lee | +| [HADOOP-13008](https://issues.apache.org/jira/browse/HADOOP-13008) | Add XFS Filter for UIs to Hadoop Common | Major | security | Larry McCay | Larry McCay | +| [HADOOP-13065](https://issues.apache.org/jira/browse/HADOOP-13065) | Add a new interface for retrieving FS and FC Statistics | Major | fs | Ram Venkatesh | Mingliang Liu | +| [HADOOP-12723](https://issues.apache.org/jira/browse/HADOOP-12723) | S3A: Add ability to plug in any AWSCredentialsProvider | Major | fs/s3 | Steven K. Wong | Steven K. Wong | +| [HADOOP-13226](https://issues.apache.org/jira/browse/HADOOP-13226) | Support async call retry and failover | Major | io, ipc | Xiaobing Zhou | Tsz Wo Nicholas Sze | +| [HADOOP-12537](https://issues.apache.org/jira/browse/HADOOP-12537) | S3A to support Amazon STS temporary credentials | Minor | fs/s3 | Sean Mackrory | Sean Mackrory | +| [HDFS-9804](https://issues.apache.org/jira/browse/HDFS-9804) | Allow long-running Balancer to login with keytab | Major | balancer & mover, security | Xiao Chen | Xiao Chen | +| [HDFS-10918](https://issues.apache.org/jira/browse/HDFS-10918) | Add a tool to get FileEncryptionInfo from CLI | Major | encryption | Xiao Chen | Xiao Chen | +| [HADOOP-13716](https://issues.apache.org/jira/browse/HADOOP-13716) | Add LambdaTestUtils class for tests; fix eventual consistency problem in contract test setup | Major | test | Steve Loughran | Steve Loughran | +| [HADOOP-14049](https://issues.apache.org/jira/browse/HADOOP-14049) | Honour AclBit flag associated to file/folder permission for Azure datalake account | Major | fs/adl | Vishwajeet Dusane | Vishwajeet Dusane | +| [HADOOP-14048](https://issues.apache.org/jira/browse/HADOOP-14048) | REDO operation of WASB#AtomicRename should create placeholder blob for destination folder | Critical | fs/azure | NITIN VERMA | NITIN VERMA | + + +### IMPROVEMENTS: + +| JIRA | Summary | Priority | Component | Reporter | Contributor | +|:---- |:---- | :--- |:---- |:---- |:---- | +| [HDFS-2580](https://issues.apache.org/jira/browse/HDFS-2580) | NameNode#main(...) can make use of GenericOptionsParser. | Minor | namenode | Harsh J | Harsh J | +| [MAPREDUCE-5232](https://issues.apache.org/jira/browse/MAPREDUCE-5232) | log classpath and other key properties on child JVM start | Major | mrv1, mrv2 | Sangjin Lee | Sangjin Lee | +| [HADOOP-7713](https://issues.apache.org/jira/browse/HADOOP-7713) | dfs -count -q should label output column | Trivial | . | Nigel Daley | Jonathan Allen | +| [HDFS-7546](https://issues.apache.org/jira/browse/HDFS-7546) | Document, and set an accepting default for dfs.namenode.kerberos.principal.pattern | Minor | security | Harsh J | Harsh J | +| [HADOOP-11692](https://issues.apache.org/jira/browse/HADOOP-11692) | Improve authentication failure WARN message to avoid user confusion | Major | ipc | Yongjun Zhang | Yongjun Zhang | +| [HADOOP-11226](https://issues.apache.org/jira/browse/HADOOP-11226) | Add a configuration to set ipc.Client's traffic class with IPTOS\_LOWDELAY\|IPTOS\_RELIABILITY | Major | ipc | Gopal V | Gopal V | +| [HADOOP-11711](https://issues.apache.org/jira/browse/HADOOP-11711) | Provide a default value for AES/CTR/NoPadding CryptoCodec classes | Minor | . | Andrew Wang | Andrew Wang | +| [MAPREDUCE-4414](https://issues.apache.org/jira/browse/MAPREDUCE-4414) | Add main methods to JobConf and YarnConfiguration, for debug purposes | Major | client | Harsh J | Plamen Jeliazkov | +| [MAPREDUCE-6105](https://issues.apache.org/jira/browse/MAPREDUCE-6105) | Inconsistent configuration in property mapreduce.reduce.shuffle.merge.percent | Trivial | . | Dongwook Kwon | Ray Chiang | +| [HDFS-2360](https://issues.apache.org/jira/browse/HDFS-2360) | Ugly stacktrace when quota exceeds | Minor | hdfs-client | Rajit Saha | Harsh J | +| [MAPREDUCE-6100](https://issues.apache.org/jira/browse/MAPREDUCE-6100) | replace "mapreduce.job.credentials.binary" with MRJobConfig.MAPREDUCE\_JOB\_CREDENTIALS\_BINARY for better readability. | Trivial | mrv2 | zhihai xu | zhihai xu | +| [MAPREDUCE-5755](https://issues.apache.org/jira/browse/MAPREDUCE-5755) | MapTask.MapOutputBuffer#compare/swap should have @Override annotation | Trivial | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa | +| [MAPREDUCE-4653](https://issues.apache.org/jira/browse/MAPREDUCE-4653) | TestRandomAlgorithm has an unused "import" statement | Trivial | contrib/gridmix | Amir Sanjar | Amir Sanjar | +| [HADOOP-11659](https://issues.apache.org/jira/browse/HADOOP-11659) | o.a.h.fs.FileSystem.Cache#remove should use a single hash map lookup | Minor | fs | Gera Shegalov | Brahma Reddy Battula | +| [HADOOP-11709](https://issues.apache.org/jira/browse/HADOOP-11709) | Time.NANOSECONDS\_PER\_MILLISECOND - use class-level final constant instead of method variable | Trivial | . | Ajith S | Ajith S | +| [HDFS-7835](https://issues.apache.org/jira/browse/HDFS-7835) | make initial sleeptime in locateFollowingBlock configurable for DFSClient. | Major | hdfs-client | zhihai xu | zhihai xu | +| [HDFS-7829](https://issues.apache.org/jira/browse/HDFS-7829) | Code clean up for LocatedBlock | Minor | . | Jing Zhao | Takanobu Asanuma | +| [MAPREDUCE-6282](https://issues.apache.org/jira/browse/MAPREDUCE-6282) | Reuse historyFileAbsolute.getFileSystem in CompletedJob#loadFullHistoryData for code optimization. | Trivial | jobhistoryserver | zhihai xu | zhihai xu | +| [HADOOP-11447](https://issues.apache.org/jira/browse/HADOOP-11447) | Add a more meaningful toString method to SampleStat and MutableStat | Minor | metrics | Karthik Kambatla | Karthik Kambatla | +| [YARN-3350](https://issues.apache.org/jira/browse/YARN-3350) | YARN RackResolver spams logs with messages at info level | Major | . | Wilfred Spiegelenburg | Wilfred Spiegelenburg | +| [MAPREDUCE-6239](https://issues.apache.org/jira/browse/MAPREDUCE-6239) | Consolidate TestJobConf classes in hadoop-mapreduce-client-jobclient and hadoop-mapreduce-client-core | Minor | client | Varun Saxena | Varun Saxena | +| [MAPREDUCE-5190](https://issues.apache.org/jira/browse/MAPREDUCE-5190) | Unnecessary condition test in RandomSampler | Minor | mrv2 | Jingguo Yao | Jingguo Yao | +| [MAPREDUCE-6287](https://issues.apache.org/jira/browse/MAPREDUCE-6287) | Deprecated methods in org.apache.hadoop.examples.Sort | Minor | examples | Chao Zhang | Chao Zhang | +| [HADOOP-11737](https://issues.apache.org/jira/browse/HADOOP-11737) | mockito's version in hadoop-nfsâ pom.xml shouldn't be specified | Minor | nfs | Kengo Seki | Kengo Seki | +| [YARN-2868](https://issues.apache.org/jira/browse/YARN-2868) | FairScheduler: Metric for latency to allocate first container for an application | Major | . | Ray Chiang | Ray Chiang | +| [HDFS-7875](https://issues.apache.org/jira/browse/HDFS-7875) | Improve log message when wrong value configured for dfs.datanode.failed.volumes.tolerated | Trivial | datanode | nijel | nijel | +| [HDFS-7793](https://issues.apache.org/jira/browse/HDFS-7793) | Refactor DFSOutputStream separating DataStreamer out | Major | hdfs-client | Kai Zheng | Li Bo | +| [HADOOP-11741](https://issues.apache.org/jira/browse/HADOOP-11741) | Add LOG.isDebugEnabled() guard for some LOG.debug() | Major | . | Walter Su | Walter Su | +| [MAPREDUCE-579](https://issues.apache.org/jira/browse/MAPREDUCE-579) | Streaming "slowmatch" documentation | Trivial | contrib/streaming | Bo Adler | Harsh J | +| [HDFS-7928](https://issues.apache.org/jira/browse/HDFS-7928) | Scanning blocks from disk during rolling upgrade startup takes a lot of time if disks are busy | Major | datanode | Rushabh S Shah | Rushabh S Shah | +| [HADOOP-11719](https://issues.apache.org/jira/browse/HADOOP-11719) | [Fsshell] Remove bin/hadoop reference from GenericOptionsParser default help text | Minor | scripts | Brahma Reddy Battula | Brahma Reddy Battula | +| [HDFS-8004](https://issues.apache.org/jira/browse/HDFS-8004) | Use KeyProviderCryptoExtension#warmUpEncryptedKeys when creating an encryption zone | Trivial | encryption | Andrew Wang | Andrew Wang | +| [HDFS-7890](https://issues.apache.org/jira/browse/HDFS-7890) | Improve information on Top users for metrics in RollingWindowsManager and lower log level | Major | . | J.Andreina | J.Andreina | +| [HDFS-4396](https://issues.apache.org/jira/browse/HDFS-4396) | Add START\_MSG/SHUTDOWN\_MSG for ZKFC | Major | auto-failover, ha, tools | Liang Xie | Liang Xie | +| [HADOOP-11660](https://issues.apache.org/jira/browse/HADOOP-11660) | Add support for hardware crc of HDFS checksums on ARM aarch64 architecture | Minor | native | Edward Nevill | Edward Nevill | +| [HDFS-7645](https://issues.apache.org/jira/browse/HDFS-7645) | Rolling upgrade is restoring blocks from trash multiple times | Major | datanode | Nathan Roberts | Keisuke Ogiwara | +| [HDFS-3918](https://issues.apache.org/jira/browse/HDFS-3918) | EditLogTailer shouldn't log WARN when other node is in standby mode | Major | ha | Todd Lipcon | Todd Lipcon | +| [HDFS-7944](https://issues.apache.org/jira/browse/HDFS-7944) | Minor cleanup of BlockPoolManager#getAllNamenodeThreads | Minor | . | Arpit Agarwal | Arpit Agarwal | +| [YARN-3258](https://issues.apache.org/jira/browse/YARN-3258) | FairScheduler: Need to add more logging to investigate allocations | Minor | fairscheduler | Anubhav Dhoot | Anubhav Dhoot | +| [HDFS-7671](https://issues.apache.org/jira/browse/HDFS-7671) | hdfs user guide should point to the common rack awareness doc | Major | documentation | Allen Wittenauer | Kai Sasaki | +| [YARN-3412](https://issues.apache.org/jira/browse/YARN-3412) | RM tests should use MockRM where possible | Major | resourcemanager, test | Karthik Kambatla | Karthik Kambatla | +| [YARN-3428](https://issues.apache.org/jira/browse/YARN-3428) | Debug log resources to be localized for a container | Trivial | nodemanager | Karthik Kambatla | Karthik Kambatla | +| [YARN-3424](https://issues.apache.org/jira/browse/YARN-3424) | Change logs for ContainerMonitorImpl's resourse monitoring from info to debug | Major | nodemanager | Anubhav Dhoot | Anubhav Dhoot | +| [YARN-3248](https://issues.apache.org/jira/browse/YARN-3248) | Display count of nodes blacklisted by apps in the web UI | Major | capacityscheduler, resourcemanager | Varun Vasudev | Varun Vasudev | +| [HDFS-7978](https://issues.apache.org/jira/browse/HDFS-7978) | Add LOG.isDebugEnabled() guard for some LOG.debug(..) | Major | . | Walter Su | Walter Su | +| [HDFS-8008](https://issues.apache.org/jira/browse/HDFS-8008) | Support client-side back off when the datanodes are congested | Major | hdfs-client | Haohui Mai | Haohui Mai | +| [HDFS-7888](https://issues.apache.org/jira/browse/HDFS-7888) | Change DataStreamer/DFSOutputStream/DFSPacket for convenience of subclassing | Minor | hdfs-client | Li Bo | Li Bo | +| [HDFS-8035](https://issues.apache.org/jira/browse/HDFS-8035) | Move checkBlocksProperlyReplicated() in FSNamesystem to BlockManager | Minor | namenode | Haohui Mai | Haohui Mai | +| [HADOOP-9805](https://issues.apache.org/jira/browse/HADOOP-9805) | Refactor RawLocalFileSystem#rename for improved testability. | Minor | fs, test | Chris Nauroth | Jean-Pierre Matsumoto | +| [HADOOP-11785](https://issues.apache.org/jira/browse/HADOOP-11785) | Reduce number of listStatus operation in distcp buildListing() | Minor | tools/distcp | Zoran Dimitrijevic | Zoran Dimitrijevic | +| [HADOOP-11717](https://issues.apache.org/jira/browse/HADOOP-11717) | Add Redirecting WebSSO behavior with JWT Token in Hadoop Auth | Major | security | Larry McCay | Larry McCay | +| [YARN-3294](https://issues.apache.org/jira/browse/YARN-3294) | Allow dumping of Capacity Scheduler debug logs via web UI for a fixed time period | Major | capacityscheduler | Varun Vasudev | Varun Vasudev | +| [HDFS-8073](https://issues.apache.org/jira/browse/HDFS-8073) | Split BlockPlacementPolicyDefault.chooseTarget(..) so it can be easily overrided. | Trivial | namenode | Walter Su | Walter Su | +| [HDFS-8076](https://issues.apache.org/jira/browse/HDFS-8076) | Code cleanup for DFSInputStream: use offset instead of LocatedBlock when possible | Major | . | Zhe Zhang | Zhe Zhang | +| [HDFS-7979](https://issues.apache.org/jira/browse/HDFS-7979) | Initialize block report IDs with a random number | Minor | datanode | Andrew Wang | Andrew Wang | +| [HDFS-8101](https://issues.apache.org/jira/browse/HDFS-8101) | DFSClient use of non-constant DFSConfigKeys pulls in WebHDFS classes at runtime | Minor | hdfs-client | Sean Busbey | Sean Busbey | +| [YARN-3293](https://issues.apache.org/jira/browse/YARN-3293) | Track and display capacity scheduler health metrics in web UI | Major | capacityscheduler | Varun Vasudev | Varun Vasudev | +| [MAPREDUCE-6291](https://issues.apache.org/jira/browse/MAPREDUCE-6291) | Correct mapred queue usage command | Minor | client | Brahma Reddy Battula | Brahma Reddy Battula | +| [MAPREDUCE-6307](https://issues.apache.org/jira/browse/MAPREDUCE-6307) | Remove property mapreduce.tasktracker.taskmemorymanager.monitoringinterval | Minor | . | Akira Ajisaka | J.Andreina | +| [YARN-3348](https://issues.apache.org/jira/browse/YARN-3348) | Add a 'yarn top' tool to help understand cluster usage | Major | resourcemanager | Varun Vasudev | Varun Vasudev | +| [YARN-3469](https://issues.apache.org/jira/browse/YARN-3469) | ZKRMStateStore: Avoid setting watches that are not required | Minor | . | Jun Gong | Jun Gong | +| [HDFS-8117](https://issues.apache.org/jira/browse/HDFS-8117) | More accurate verification in SimulatedFSDataset: replace DEFAULT\_DATABYTE with patterned data | Major | . | Zhe Zhang | Zhe Zhang | +| [HDFS-8144](https://issues.apache.org/jira/browse/HDFS-8144) | Split TestLazyPersistFiles into multiple tests | Major | test | Arpit Agarwal | Arpit Agarwal | +| [YARN-3404](https://issues.apache.org/jira/browse/YARN-3404) | View the queue name to YARN Application page | Minor | . | Ryu Kobayashi | Ryu Kobayashi | +| [YARN-3451](https://issues.apache.org/jira/browse/YARN-3451) | Add start time and Elapsed in ApplicationAttemptReport and display the same in RMAttemptBlock WebUI | Major | api, webapp | Rohith Sharma K S | Rohith Sharma K S | +| [HDFS-7863](https://issues.apache.org/jira/browse/HDFS-7863) | Missing description of some methods and parameters in javadoc of FSDirDeleteOp | Minor | . | Yongjun Zhang | Brahma Reddy Battula | +| [HDFS-8152](https://issues.apache.org/jira/browse/HDFS-8152) | Refactoring of lazy persist storage cases | Major | test | Arpit Agarwal | Arpit Agarwal | +| [HDFS-8133](https://issues.apache.org/jira/browse/HDFS-8133) | Improve readability of deleted block check | Major | namenode | Daryn Sharp | Daryn Sharp | +| [HADOOP-11812](https://issues.apache.org/jira/browse/HADOOP-11812) | Implement listLocatedStatus for ViewFileSystem to speed up split calculation | Blocker | fs | Gera Shegalov | Gera Shegalov | +| [MAPREDUCE-6297](https://issues.apache.org/jira/browse/MAPREDUCE-6297) | Task Id of the failed task in diagnostics should link to the task page | Minor | jobhistoryserver | Siqi Li | Siqi Li | +| [HADOOP-11827](https://issues.apache.org/jira/browse/HADOOP-11827) | Speed-up distcp buildListing() using threadpool | Major | tools/distcp | Zoran Dimitrijevic | Zoran Dimitrijevic | +| [YARN-3494](https://issues.apache.org/jira/browse/YARN-3494) | Expose AM resource limit and usage in QueueMetrics | Major | . | Jian He | Rohith Sharma K S | +| [YARN-3503](https://issues.apache.org/jira/browse/YARN-3503) | Expose disk utilization percentage and bad local and log dir counts on NM via JMX | Major | nodemanager | Varun Vasudev | Varun Vasudev | +| [YARN-3410](https://issues.apache.org/jira/browse/YARN-3410) | YARN admin should be able to remove individual application records from RMStateStore | Critical | resourcemanager, yarn | Wangda Tan | Rohith Sharma K S | +| [HDFS-8215](https://issues.apache.org/jira/browse/HDFS-8215) | Refactor NamenodeFsck#check method | Minor | namenode | Takanobu Asanuma | Takanobu Asanuma | +| [YARN-3511](https://issues.apache.org/jira/browse/YARN-3511) | Add errors and warnings page to ATS | Major | timelineserver | Varun Vasudev | Varun Vasudev | +| [HDFS-8176](https://issues.apache.org/jira/browse/HDFS-8176) | Record from/to snapshots in audit log for snapshot diff report | Minor | snapshots | J.Andreina | J.Andreina | +| [YARN-3406](https://issues.apache.org/jira/browse/YARN-3406) | Display count of running containers in the RM's Web UI | Minor | . | Ryu Kobayashi | Ryu Kobayashi | +| [HADOOP-11357](https://issues.apache.org/jira/browse/HADOOP-11357) | Print information of the build enviornment in test-patch.sh | Minor | scripts | Haohui Mai | Allen Wittenauer | +| [HDFS-8204](https://issues.apache.org/jira/browse/HDFS-8204) | Mover/Balancer should not schedule two replicas to the same DN | Minor | balancer & mover | Walter Su | Walter Su | +| [HDFS-8280](https://issues.apache.org/jira/browse/HDFS-8280) | Code Cleanup in DFSInputStream | Minor | . | Jing Zhao | Jing Zhao | +| [HDFS-8283](https://issues.apache.org/jira/browse/HDFS-8283) | DataStreamer cleanup and some minor improvement | Minor | hdfs-client | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | +| [HDFS-5574](https://issues.apache.org/jira/browse/HDFS-5574) | Remove buffer copy in BlockReader.skip | Trivial | . | Binglin Chang | Binglin Chang | +| [HDFS-7770](https://issues.apache.org/jira/browse/HDFS-7770) | Need document for storage type label of data node storage locations under dfs.datanode.data.dir | Major | documentation | Xiaoyu Yao | Xiaoyu Yao | +| [HDFS-8200](https://issues.apache.org/jira/browse/HDFS-8200) | Refactor FSDirStatAndListingOp | Major | . | Haohui Mai | Haohui Mai | +| [YARN-3363](https://issues.apache.org/jira/browse/YARN-3363) | add localization and container launch time to ContainerMetrics at NM to show these timing information for each active container. | Major | nodemanager | zhihai xu | zhihai xu | +| [HDFS-7397](https://issues.apache.org/jira/browse/HDFS-7397) | Add more detail to the documentation for the conf key "dfs.client.read.shortcircuit.streams.cache.size" | Minor | hdfs-client | Tsz Wo Nicholas Sze | Brahma Reddy Battula | +| [YARN-2980](https://issues.apache.org/jira/browse/YARN-2980) | Move health check script related functionality to hadoop-common | Blocker | . | Ming Ma | Varun Saxena | +| [HADOOP-11911](https://issues.apache.org/jira/browse/HADOOP-11911) | test-patch should allow configuration of default branch | Minor | . | Sean Busbey | Sean Busbey | +| [HDFS-7758](https://issues.apache.org/jira/browse/HDFS-7758) | Retire FsDatasetSpi#getVolumes() and use FsDatasetSpi#getVolumeRefs() instead | Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HADOOP-11925](https://issues.apache.org/jira/browse/HADOOP-11925) | backport trunk's smart-apply-patch.sh to branch-2 | Major | scripts | Allen Wittenauer | Allen Wittenauer | +| [MAPREDUCE-6192](https://issues.apache.org/jira/browse/MAPREDUCE-6192) | Create unit test to automatically compare MR related classes and mapred-default.xml | Minor | . | Ray Chiang | Ray Chiang | +| [HADOOP-11813](https://issues.apache.org/jira/browse/HADOOP-11813) | releasedocmaker.py should use today's date instead of unreleased | Minor | build | Allen Wittenauer | Darrell Taylor | +| [YARN-3491](https://issues.apache.org/jira/browse/YARN-3491) | PublicLocalizer#addResource is too slow. | Critical | nodemanager | zhihai xu | zhihai xu | +| [MAPREDUCE-6279](https://issues.apache.org/jira/browse/MAPREDUCE-6279) | AM should explicity exit JVM after all services have stopped | Major | . | Jason Lowe | Eric Payne | +| [HDFS-8108](https://issues.apache.org/jira/browse/HDFS-8108) | Fsck should provide the info on mandatory option to be used along with "-blocks , -locations and -racks" | Trivial | documentation | J.Andreina | J.Andreina | +| [HDFS-8207](https://issues.apache.org/jira/browse/HDFS-8207) | Improper log message when blockreport interval compared with initial delay | Minor | . | Brahma Reddy Battula | Brahma Reddy Battula | +| [MAPREDUCE-6079](https://issues.apache.org/jira/browse/MAPREDUCE-6079) | Rename JobImpl#username to reporterUserName | Major | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa | +| [HDFS-8209](https://issues.apache.org/jira/browse/HDFS-8209) | Support different number of datanode directories in MiniDFSCluster. | Minor | test | Surendra Singh Lilhore | Surendra Singh Lilhore | +| [YARN-3169](https://issues.apache.org/jira/browse/YARN-3169) | Drop YARN's overview document | Major | documentation | Allen Wittenauer | Brahma Reddy Battula | +| [YARN-2784](https://issues.apache.org/jira/browse/YARN-2784) | Make POM project names consistent | Minor | build | Rohith Sharma K S | Rohith Sharma K S | +| [MAPREDUCE-5981](https://issues.apache.org/jira/browse/MAPREDUCE-5981) | Log levels of certain MR logs can be changed to DEBUG | Major | . | Varun Saxena | Varun Saxena | +| [HADOOP-6842](https://issues.apache.org/jira/browse/HADOOP-6842) | "hadoop fs -text" does not give a useful text representation of MapWritable objects | Major | io | Steven K. Wong | Akira Ajisaka | +| [YARN-20](https://issues.apache.org/jira/browse/YARN-20) | More information for "yarn.resourcemanager.webapp.address" in yarn-default.xml | Trivial | documentation, resourcemanager | Nemon Lou | Bartosz Åugowski | +| [HDFS-5640](https://issues.apache.org/jira/browse/HDFS-5640) | Add snapshot methods to FileContext. | Major | hdfs-client, snapshots | Chris Nauroth | Rakesh R | +| [HDFS-8284](https://issues.apache.org/jira/browse/HDFS-8284) | Update documentation about how to use HTrace with HDFS | Major | documentation | Masatake Iwasaki | Masatake Iwasaki | +| [HDFS-7433](https://issues.apache.org/jira/browse/HDFS-7433) | Optimize performance of DatanodeManager's node map | Critical | namenode | Daryn Sharp | Daryn Sharp | +| [MAPREDUCE-5248](https://issues.apache.org/jira/browse/MAPREDUCE-5248) | Let NNBenchWithoutMR specify the replication factor for its test | Minor | client, test | Erik Paulson | Erik Paulson | +| [HADOOP-9737](https://issues.apache.org/jira/browse/HADOOP-9737) | JarFinder#getJar should delete the jar file upon destruction of the JVM | Major | util | Esteban Gutierrez | Jean-Baptiste Onofré | +| [YARN-1050](https://issues.apache.org/jira/browse/YARN-1050) | Document the Fair Scheduler REST API | Major | documentation, fairscheduler | Sandy Ryza | Kenji Kikushima | +| [YARN-3271](https://issues.apache.org/jira/browse/YARN-3271) | FairScheduler: Move tests related to max-runnable-apps from TestFairScheduler to TestAppRunnability | Major | . | Karthik Kambatla | nijel | +| [YARN-2206](https://issues.apache.org/jira/browse/YARN-2206) | Update document for applications REST API response examples | Minor | documentation | Kenji Kikushima | Brahma Reddy Battula | +| [HDFS-6757](https://issues.apache.org/jira/browse/HDFS-6757) | Simplify lease manager with INodeID | Major | . | Haohui Mai | Haohui Mai | +| [HDFS-8327](https://issues.apache.org/jira/browse/HDFS-8327) | Simplify quota calculations for snapshots and truncate | Major | . | Haohui Mai | Haohui Mai | +| [YARN-1287](https://issues.apache.org/jira/browse/YARN-1287) | Consolidate MockClocks | Major | . | Sandy Ryza | Sebastian Wong | +| [HDFS-8357](https://issues.apache.org/jira/browse/HDFS-8357) | Consolidate parameters of INode.CleanSubtree() into a parameter objects. | Major | . | Haohui Mai | Li Lu | +| [HADOOP-11950](https://issues.apache.org/jira/browse/HADOOP-11950) | Add cli option to test-patch to set the project-under-test | Minor | . | Sean Busbey | Sean Busbey | +| [HADOOP-11948](https://issues.apache.org/jira/browse/HADOOP-11948) | test-patch's issue matching regex should be configurable. | Major | . | Sean Busbey | Sean Busbey | +| [MAPREDUCE-5465](https://issues.apache.org/jira/browse/MAPREDUCE-5465) | Tasks are often killed before they exit on their own | Major | mr-am, mrv2 | Radim Kolar | Ming Ma | +| [YARN-3513](https://issues.apache.org/jira/browse/YARN-3513) | Remove unused variables in ContainersMonitorImpl and add debug log for overall resource usage by all containers | Trivial | nodemanager | Naganarasimha G R | Naganarasimha G R | +| [HDFS-8255](https://issues.apache.org/jira/browse/HDFS-8255) | Rename getBlockReplication to getPreferredBlockReplication | Major | . | Zhe Zhang | Zhe Zhang | +| [YARN-3613](https://issues.apache.org/jira/browse/YARN-3613) | TestContainerManagerSecurity should init and start Yarn cluster in setup instead of individual methods | Minor | test | Karthik Kambatla | nijel | +| [HDFS-6184](https://issues.apache.org/jira/browse/HDFS-6184) | Capture NN's thread dump when it fails over | Major | namenode | Ming Ma | Ming Ma | +| [YARN-3539](https://issues.apache.org/jira/browse/YARN-3539) | Compatibility doc to state that ATS v1 is a stable REST API | Major | documentation | Steve Loughran | Steve Loughran | +| [HADOOP-9723](https://issues.apache.org/jira/browse/HADOOP-9723) | Improve error message when hadoop archive output path already exists | Trivial | . | Stephen Chu | Yongjun Zhang | +| [HADOOP-11713](https://issues.apache.org/jira/browse/HADOOP-11713) | ViewFileSystem should support snapshot methods. | Major | fs | Chris Nauroth | Rakesh R | +| [HDFS-8350](https://issues.apache.org/jira/browse/HDFS-8350) | Remove old webhdfs.xml and other outdated documentation stuff | Major | documentation | Akira Ajisaka | Brahma Reddy Battula | +| [HADOOP-11960](https://issues.apache.org/jira/browse/HADOOP-11960) | Enable Azure-Storage Client Side logging. | Major | tools | Dushyanth | Dushyanth | +| [HDFS-6888](https://issues.apache.org/jira/browse/HDFS-6888) | Allow selectively audit logging ops | Major | . | Kihwal Lee | Chen He | +| [HDFS-8397](https://issues.apache.org/jira/browse/HDFS-8397) | Refactor the error handling code in DataStreamer | Minor | hdfs-client | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | +| [HDFS-8394](https://issues.apache.org/jira/browse/HDFS-8394) | Move getAdditionalBlock() and related functionalities into a separate class | Major | . | Haohui Mai | Haohui Mai | +| [HADOOP-11939](https://issues.apache.org/jira/browse/HADOOP-11939) | Deprecate DistCpV1 and Logalyzer | Major | . | Brahma Reddy Battula | Brahma Reddy Battula | +| [HDFS-4185](https://issues.apache.org/jira/browse/HDFS-4185) | Add a metric for number of active leases | Major | namenode | Kihwal Lee | Rakesh R | +| [HADOOP-1540](https://issues.apache.org/jira/browse/HADOOP-1540) | Support file exclusion list in distcp | Minor | util | Senthil Subramanian | Rich Haase | +| [HADOOP-11103](https://issues.apache.org/jira/browse/HADOOP-11103) | Clean up RemoteException | Trivial | ipc | Sean Busbey | Sean Busbey | +| [HDFS-8131](https://issues.apache.org/jira/browse/HDFS-8131) | Implement a space balanced block placement policy | Minor | namenode | Liu Shaohui | Liu Shaohui | +| [HADOOP-11970](https://issues.apache.org/jira/browse/HADOOP-11970) | Replace uses of ThreadLocal\<Random\> with JDK7 ThreadLocalRandom | Major | . | Sean Busbey | Sean Busbey | +| [HADOOP-11995](https://issues.apache.org/jira/browse/HADOOP-11995) | Make jetty version configurable from the maven command line | Trivial | build, ld | sriharsha devineni | sriharsha devineni | +| [HDFS-4383](https://issues.apache.org/jira/browse/HDFS-4383) | Document the lease limits | Minor | . | Eli Collins | Mohammad Arshad | +| [HADOOP-10366](https://issues.apache.org/jira/browse/HADOOP-10366) | Add whitespaces between the classes for values in core-default.xml to fit better in browser | Minor | documentation | Chengwei Yang | Kanaka Kumar Avvaru | +| [HADOOP-11594](https://issues.apache.org/jira/browse/HADOOP-11594) | Improve the readability of site index of documentation | Minor | documentation | Masatake Iwasaki | Masatake Iwasaki | +| [YARN-160](https://issues.apache.org/jira/browse/YARN-160) | nodemanagers should obtain cpu/memory values from underlying OS | Major | nodemanager | Alejandro Abdelnur | Varun Vasudev | +| [HADOOP-11242](https://issues.apache.org/jira/browse/HADOOP-11242) | Record the time of calling in tracing span of IPC server | Minor | ipc | Masatake Iwasaki | Masatake Iwasaki | +| [YARN-3722](https://issues.apache.org/jira/browse/YARN-3722) | Merge multiple TestWebAppUtils into o.a.h.yarn.webapp.util.TestWebAppUtils | Minor | test | Masatake Iwasaki | Masatake Iwasaki | +| [HADOOP-11894](https://issues.apache.org/jira/browse/HADOOP-11894) | Bump the version of Apache HTrace to 3.2.0-incubating | Major | . | Masatake Iwasaki | Masatake Iwasaki | +| [YARN-3489](https://issues.apache.org/jira/browse/YARN-3489) | RMServerUtils.validateResourceRequests should only obtain queue info once | Major | resourcemanager | Jason Lowe | Varun Saxena | +| [HDFS-8443](https://issues.apache.org/jira/browse/HDFS-8443) | Document dfs.namenode.service.handler.count in hdfs-site.xml | Major | documentation | Akira Ajisaka | J.Andreina | +| [YARN-3547](https://issues.apache.org/jira/browse/YARN-3547) | FairScheduler: Apps that have no resource demand should not participate scheduling | Major | fairscheduler | Xianyin Xin | Xianyin Xin | +| [YARN-3713](https://issues.apache.org/jira/browse/YARN-3713) | Remove duplicate function call storeContainerDiagnostics in ContainerDiagnosticsUpdateTransition | Minor | nodemanager | zhihai xu | zhihai xu | +| [HADOOP-12043](https://issues.apache.org/jira/browse/HADOOP-12043) | Display warning if defaultFs is not set when running fs commands. | Minor | fs | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [YARN-3467](https://issues.apache.org/jira/browse/YARN-3467) | Expose allocatedMB, allocatedVCores, and runningContainers metrics on running Applications in RM Web UI | Minor | webapp, yarn | Anthony Rojas | Anubhav Dhoot | +| [HDFS-8490](https://issues.apache.org/jira/browse/HDFS-8490) | Typo in trace enabled log in ExceptionHandler of WebHDFS | Trivial | webhdfs | Jakob Homan | Archana T | +| [HDFS-8521](https://issues.apache.org/jira/browse/HDFS-8521) | Add @VisibleForTesting annotation to {{BlockPoolSlice#selectReplicaToDelete}} | Trivial | . | Colin P. McCabe | Colin P. McCabe | +| [MAPREDUCE-6174](https://issues.apache.org/jira/browse/MAPREDUCE-6174) | Combine common stream code into parent class for InMemoryMapOutput and OnDiskMapOutput. | Major | mrv2 | Eric Payne | Eric Payne | +| [HDFS-8532](https://issues.apache.org/jira/browse/HDFS-8532) | Make the visibility of DFSOutputStream#streamer member variable to private | Trivial | . | Rakesh R | Rakesh R | +| [HDFS-8535](https://issues.apache.org/jira/browse/HDFS-8535) | Clarify that dfs usage in dfsadmin -report output includes all block replicas. | Minor | documentation | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [MAPREDUCE-6383](https://issues.apache.org/jira/browse/MAPREDUCE-6383) | Pi job (QuasiMonteCarlo) should not try to read the results file if its job fails | Major | examples | Harsh J | Harsh J | +| [YARN-3259](https://issues.apache.org/jira/browse/YARN-3259) | FairScheduler: Trigger fairShare updates on node events | Major | fairscheduler | Anubhav Dhoot | Anubhav Dhoot | +| [HADOOP-12059](https://issues.apache.org/jira/browse/HADOOP-12059) | S3Credentials should support use of CredentialProvider | Major | fs/s3 | Sean Busbey | Sean Busbey | +| [MAPREDUCE-6354](https://issues.apache.org/jira/browse/MAPREDUCE-6354) | ShuffleHandler should be able to log shuffle connections | Major | . | Chang Li | Chang Li | +| [HADOOP-12055](https://issues.apache.org/jira/browse/HADOOP-12055) | Deprecate usage of NativeIO#link | Major | native | Andrew Wang | Andrew Wang | +| [HDFS-8432](https://issues.apache.org/jira/browse/HDFS-8432) | Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases. | Major | namenode, rolling upgrades | Chris Nauroth | Chris Nauroth | +| [HDFS-8116](https://issues.apache.org/jira/browse/HDFS-8116) | Cleanup uncessary if LOG.isDebugEnabled() from RollingWindowManager | Trivial | namenode | Xiaoyu Yao | Brahma Reddy Battula | +| [YARN-2716](https://issues.apache.org/jira/browse/YARN-2716) | Refactor ZKRMStateStore retry code with Apache Curator | Major | . | Jian He | Karthik Kambatla | +| [HDFS-8553](https://issues.apache.org/jira/browse/HDFS-8553) | Document hdfs class path options | Major | documentation | Xiaoyu Yao | Brahma Reddy Battula | +| [YARN-3786](https://issues.apache.org/jira/browse/YARN-3786) | Document yarn class path options | Major | documentation | Brahma Reddy Battula | Brahma Reddy Battula | +| [MAPREDUCE-6392](https://issues.apache.org/jira/browse/MAPREDUCE-6392) | Document mapred class path options | Major | documentation | Brahma Reddy Battula | Brahma Reddy Battula | +| [HDFS-8549](https://issues.apache.org/jira/browse/HDFS-8549) | Abort the balancer if an upgrade is in progress | Major | balancer & mover | Andrew Wang | Andrew Wang | +| [HDFS-8573](https://issues.apache.org/jira/browse/HDFS-8573) | Move creation of restartMeta file logic from BlockReceiver to ReplicaInPipeline | Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HADOOP-11971](https://issues.apache.org/jira/browse/HADOOP-11971) | Move test utilities for tracing from hadoop-hdfs to hadoop-common | Minor | tracing | Masatake Iwasaki | Masatake Iwasaki | +| [HDFS-8361](https://issues.apache.org/jira/browse/HDFS-8361) | Choose SSD over DISK in block placement | Major | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | +| [YARN-3789](https://issues.apache.org/jira/browse/YARN-3789) | Improve logs for LeafQueue#activateApplications() | Minor | resourcemanager | Bibin A Chundatt | Bibin A Chundatt | +| [HDFS-8606](https://issues.apache.org/jira/browse/HDFS-8606) | Cleanup DFSOutputStream by removing unwanted changes | Minor | hdfs-client | Rakesh R | Rakesh R | +| [YARN-3148](https://issues.apache.org/jira/browse/YARN-3148) | Allow CORS related headers to passthrough in WebAppProxyServlet | Major | . | Prakash Ramachandran | Varun Saxena | +| [HDFS-8589](https://issues.apache.org/jira/browse/HDFS-8589) | Fix unused imports in BPServiceActor and BlockReportLeaseManager | Trivial | . | Colin P. McCabe | Colin P. McCabe | +| [HADOOP-7139](https://issues.apache.org/jira/browse/HADOOP-7139) | Allow appending to existing SequenceFiles | Major | io | Stephen Rose | Kanaka Kumar Avvaru | +| [HDFS-8605](https://issues.apache.org/jira/browse/HDFS-8605) | Merge Refactor of DFSOutputStream from HDFS-7285 branch | Major | . | Vinayakumar B | Vinayakumar B | +| [MAPREDUCE-6395](https://issues.apache.org/jira/browse/MAPREDUCE-6395) | Improve the commit failure messages in MRAppMaster recovery | Major | applicationmaster | Gera Shegalov | Brahma Reddy Battula | +| [HDFS-8582](https://issues.apache.org/jira/browse/HDFS-8582) | Support getting a list of reconfigurable config properties and do not generate spurious reconfig warnings | Minor | datanode, hdfs-client | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [MAPREDUCE-6316](https://issues.apache.org/jira/browse/MAPREDUCE-6316) | Task Attempt List entries should link to the task overview | Major | . | Siqi Li | Siqi Li | +| [MAPREDUCE-6305](https://issues.apache.org/jira/browse/MAPREDUCE-6305) | AM/Task log page should be able to link back to the job | Major | . | Siqi Li | Siqi Li | +| [YARN-3834](https://issues.apache.org/jira/browse/YARN-3834) | Scrub debug logging of tokens during resource localization. | Major | nodemanager | Chris Nauroth | Chris Nauroth | +| [MAPREDUCE-6408](https://issues.apache.org/jira/browse/MAPREDUCE-6408) | Queue name and user name should be printed on the job page | Major | applicationmaster | Siqi Li | Siqi Li | +| [HDFS-8639](https://issues.apache.org/jira/browse/HDFS-8639) | Option for HTTP port of NameNode by MiniDFSClusterManager | Minor | test | Kai Sasaki | Kai Sasaki | +| [YARN-3360](https://issues.apache.org/jira/browse/YARN-3360) | Add JMX metrics to TimelineDataManager | Major | timelineserver | Jason Lowe | Jason Lowe | +| [HADOOP-12049](https://issues.apache.org/jira/browse/HADOOP-12049) | Control http authentication cookie persistence via configuration | Major | security | Benoy Antony | Huizhi Lu | +| [HDFS-8462](https://issues.apache.org/jira/browse/HDFS-8462) | Implement GETXATTRS and LISTXATTRS operations for WebImageViewer | Major | . | Akira Ajisaka | Jagadesh Kiran N | +| [HDFS-8640](https://issues.apache.org/jira/browse/HDFS-8640) | Make reserved RBW space visible through JMX | Major | . | Kanaka Kumar Avvaru | Kanaka Kumar Avvaru | +| [HDFS-8546](https://issues.apache.org/jira/browse/HDFS-8546) | Use try with resources in DataStorage and Storage | Minor | datanode | Andrew Wang | Andrew Wang | +| [HADOOP-11807](https://issues.apache.org/jira/browse/HADOOP-11807) | add a lint mode to releasedocmaker | Minor | build, documentation, yetus | Allen Wittenauer | ramtin | +| [HDFS-8653](https://issues.apache.org/jira/browse/HDFS-8653) | Code cleanup for DatanodeManager, DatanodeDescriptor and DatanodeStorageInfo | Major | . | Zhe Zhang | Zhe Zhang | +| [HDFS-8659](https://issues.apache.org/jira/browse/HDFS-8659) | Block scanner INFO message is spamming logs | Major | datanode | Yongjun Zhang | Yongjun Zhang | +| [MAPREDUCE-6384](https://issues.apache.org/jira/browse/MAPREDUCE-6384) | Add the last reporting reducer info for too many fetch failure diagnostics | Major | . | Chang Li | Chang Li | +| [HADOOP-12158](https://issues.apache.org/jira/browse/HADOOP-12158) | Improve error message in TestCryptoStreamsWithOpensslAesCtrCryptoCodec when OpenSSL is not installed | Trivial | test | Andrew Wang | Andrew Wang | +| [HADOOP-12172](https://issues.apache.org/jira/browse/HADOOP-12172) | FsShell mkdir -p makes an unnecessary check for the existence of the parent. | Minor | fs | Chris Nauroth | Chris Nauroth | +| [HDFS-8703](https://issues.apache.org/jira/browse/HDFS-8703) | Merge refactor of DFSInputStream from ErasureCoding branch | Major | . | Vinayakumar B | Vinayakumar B | +| [HDFS-8709](https://issues.apache.org/jira/browse/HDFS-8709) | Clarify automatic sync in FSEditLog#logEdit | Minor | . | Andrew Wang | Andrew Wang | +| [HADOOP-12045](https://issues.apache.org/jira/browse/HADOOP-12045) | Enable LocalFileSystem#setTimes to change atime | Minor | fs | Kazuho Fujii | Kazuho Fujii | +| [HADOOP-12185](https://issues.apache.org/jira/browse/HADOOP-12185) | NetworkTopology is not efficient adding/getting/removing nodes | Major | . | Inigo Goiri | Inigo Goiri | +| [HADOOP-12135](https://issues.apache.org/jira/browse/HADOOP-12135) | cleanup releasedocmaker | Major | yetus | Allen Wittenauer | Allen Wittenauer | +| [HADOOP-12195](https://issues.apache.org/jira/browse/HADOOP-12195) | Add annotation to package-info.java file to workaround MCOMPILER-205 | Trivial | . | Andrew Wang | Andrew Wang | +| [HADOOP-12193](https://issues.apache.org/jira/browse/HADOOP-12193) | Rename Touchz.java to Touch.java | Trivial | . | Andrew Wang | Andrew Wang | +| [HDFS-8711](https://issues.apache.org/jira/browse/HDFS-8711) | setSpaceQuota command should print the available storage type when input storage type is wrong | Major | hdfs-client | Surendra Singh Lilhore | Surendra Singh Lilhore | +| [HDFS-8712](https://issues.apache.org/jira/browse/HDFS-8712) | Remove "public" and "abstract" modifiers in FsVolumeSpi and FsDatasetSpi | Trivial | . | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HADOOP-12194](https://issues.apache.org/jira/browse/HADOOP-12194) | Support for incremental generation in the protoc plugin | Major | . | Andrew Wang | Andrew Wang | +| [HADOOP-12180](https://issues.apache.org/jira/browse/HADOOP-12180) | Move ResourceCalculatorPlugin from YARN to Common | Major | util | Chris Douglas | Chris Douglas | +| [HADOOP-12210](https://issues.apache.org/jira/browse/HADOOP-12210) | Collect network usage on the node | Major | . | Robert Grandl | Robert Grandl | +| [YARN-3069](https://issues.apache.org/jira/browse/YARN-3069) | Document missing properties in yarn-default.xml | Major | documentation | Ray Chiang | Ray Chiang | +| [YARN-3381](https://issues.apache.org/jira/browse/YARN-3381) | Fix typo InvalidStateTransitonException | Minor | api | Xiaoshuang LU | Brahma Reddy Battula | +| [HADOOP-12211](https://issues.apache.org/jira/browse/HADOOP-12211) | Collect disks usages on the node | Major | . | Robert Grandl | Robert Grandl | +| [HDFS-8722](https://issues.apache.org/jira/browse/HDFS-8722) | Optimize datanode writes for small writes and flushes | Critical | . | Kihwal Lee | Kihwal Lee | +| [HADOOP-12232](https://issues.apache.org/jira/browse/HADOOP-12232) | Upgrade Tomcat dependency to 6.0.44. | Major | build | Chris Nauroth | Chris Nauroth | +| [YARN-3170](https://issues.apache.org/jira/browse/YARN-3170) | YARN architecture document needs updating | Major | documentation | Allen Wittenauer | Brahma Reddy Battula | +| [MAPREDUCE-5762](https://issues.apache.org/jira/browse/MAPREDUCE-5762) | Port MAPREDUCE-3223 and MAPREDUCE-4695 (Remove MRv1 config from mapred-default.xml) to branch-2 | Minor | documentation | Akira Ajisaka | Akira Ajisaka | +| [YARN-3174](https://issues.apache.org/jira/browse/YARN-3174) | Consolidate the NodeManager and NodeManagerRestart documentation into one | Major | documentation | Allen Wittenauer | Masatake Iwasaki | +| [HDFS-7314](https://issues.apache.org/jira/browse/HDFS-7314) | When the DFSClient lease cannot be renewed, abort open-for-write files rather than the entire DFSClient | Major | . | Ming Ma | Ming Ma | +| [HADOOP-11893](https://issues.apache.org/jira/browse/HADOOP-11893) | Mark org.apache.hadoop.security.token.Token as @InterfaceAudience.Public | Major | security | Steve Loughran | Brahma Reddy Battula | +| [HADOOP-12081](https://issues.apache.org/jira/browse/HADOOP-12081) | Fix UserGroupInformation.java to support 64-bit zLinux | Major | security | Adam Roberts | Akira Ajisaka | +| [HADOOP-12214](https://issues.apache.org/jira/browse/HADOOP-12214) | Parse 'HadoopArchive' commandline using cli Options. | Minor | . | Vinayakumar B | Vinayakumar B | +| [YARN-2921](https://issues.apache.org/jira/browse/YARN-2921) | Fix MockRM/MockAM#waitForState sleep too long | Major | test | Karthik Kambatla | Tsuyoshi Ozawa | +| [HADOOP-12161](https://issues.apache.org/jira/browse/HADOOP-12161) | Add getStoragePolicy API to the FileSystem interface | Major | fs | Arpit Agarwal | Brahma Reddy Battula | +| [HADOOP-12189](https://issues.apache.org/jira/browse/HADOOP-12189) | Improve CallQueueManager#swapQueue to make queue elements drop nearly impossible. | Major | ipc, test | zhihai xu | zhihai xu | +| [HADOOP-12009](https://issues.apache.org/jira/browse/HADOOP-12009) | Clarify FileSystem.listStatus() sorting order & fix FileSystemContractBaseTest:testListStatus | Minor | documentation, fs, test | Jakob Homan | J.Andreina | +| [HADOOP-12259](https://issues.apache.org/jira/browse/HADOOP-12259) | Utility to Dynamic port allocation | Major | test, util | Brahma Reddy Battula | Brahma Reddy Battula | +| [HDFS-8735](https://issues.apache.org/jira/browse/HDFS-8735) | Inotify : All events classes should implement toString() API. | Major | hdfs-client | Surendra Singh Lilhore | Surendra Singh Lilhore | +| [HDFS-7858](https://issues.apache.org/jira/browse/HDFS-7858) | Improve HA Namenode Failover detection on the client | Major | hdfs-client | Arun Suresh | Arun Suresh | +| [HDFS-8180](https://issues.apache.org/jira/browse/HDFS-8180) | AbstractFileSystem Implementation for WebHdfs | Major | webhdfs | Santhosh G Nayak | Santhosh G Nayak | +| [HDFS-8811](https://issues.apache.org/jira/browse/HDFS-8811) | Move BlockStoragePolicy name's constants from HdfsServerConstants.java to HdfsConstants.java | Major | . | Vinayakumar B | Vinayakumar B | +| [HDFS-8822](https://issues.apache.org/jira/browse/HDFS-8822) | Add SSD storagepolicy tests in TestBlockStoragePolicy#testDefaultPolicies | Major | . | Vinayakumar B | Vinayakumar B | +| [YARN-3950](https://issues.apache.org/jira/browse/YARN-3950) | Add unique YARN\_SHELL\_ID environment variable to DistributedShell | Major | applications/distributed-shell | Robert Kanter | Robert Kanter | +| [YARN-2768](https://issues.apache.org/jira/browse/YARN-2768) | Avoid cloning Resource in FSAppAttempt#updateDemand | Minor | fairscheduler | Hong Zhiguo | Hong Zhiguo | +| [HDFS-8816](https://issues.apache.org/jira/browse/HDFS-8816) | Improve visualization for the Datanode tab in the NN UI | Major | . | Haohui Mai | Haohui Mai | +| [HDFS-8821](https://issues.apache.org/jira/browse/HDFS-8821) | Explain message "Operation category X is not supported in state standby" | Minor | . | Gautam Gopalakrishnan | Gautam Gopalakrishnan | +| [HADOOP-12271](https://issues.apache.org/jira/browse/HADOOP-12271) | Hadoop Jar Error Should Be More Explanatory | Minor | . | Jesse Anderson | Josh Elser | +| [HADOOP-12183](https://issues.apache.org/jira/browse/HADOOP-12183) | Annotate the HTrace span created by FsShell with the command-line arguments passed by the user | Minor | tracing | Masatake Iwasaki | Masatake Iwasaki | +| [YARN-3978](https://issues.apache.org/jira/browse/YARN-3978) | Configurably turn off the saving of container info in Generic AHS | Major | timelineserver, yarn | Eric Payne | Eric Payne | +| [YARN-3965](https://issues.apache.org/jira/browse/YARN-3965) | Add startup timestamp to nodemanager UI | Minor | nodemanager | Hong Zhiguo | Hong Zhiguo | +| [HADOOP-12280](https://issues.apache.org/jira/browse/HADOOP-12280) | Skip unit tests based on maven profile rather than NativeCodeLoader.isNativeCodeLoaded | Minor | test | Masatake Iwasaki | Masatake Iwasaki | +| [HDFS-8815](https://issues.apache.org/jira/browse/HDFS-8815) | DFS getStoragePolicy implementation using single RPC call | Major | hdfs-client | Arpit Agarwal | Surendra Singh Lilhore | +| [YARN-3961](https://issues.apache.org/jira/browse/YARN-3961) | Expose pending, running and reserved containers of a queue in REST api and yarn top | Major | capacityscheduler, fairscheduler, webapp | Anubhav Dhoot | Anubhav Dhoot | +| [YARN-4019](https://issues.apache.org/jira/browse/YARN-4019) | Add JvmPauseMonitor to ResourceManager and NodeManager | Major | nodemanager, resourcemanager | Robert Kanter | Robert Kanter | +| [MAPREDUCE-6443](https://issues.apache.org/jira/browse/MAPREDUCE-6443) | Add JvmPauseMonitor to Job History Server | Major | jobhistoryserver | Robert Kanter | Robert Kanter | +| [HDFS-8887](https://issues.apache.org/jira/browse/HDFS-8887) | Expose storage type and storage ID in BlockLocation | Major | . | Andrew Wang | Andrew Wang | +| [HADOOP-12318](https://issues.apache.org/jira/browse/HADOOP-12318) | Expose underlying LDAP exceptions in SaslPlainServer | Minor | security | Mike Yoder | Mike Yoder | +| [HADOOP-12295](https://issues.apache.org/jira/browse/HADOOP-12295) | Improve NetworkTopology#InnerNode#remove logic | Major | . | Yi Liu | Yi Liu | +| [HDFS-7649](https://issues.apache.org/jira/browse/HDFS-7649) | Multihoming docs should emphasize using hostnames in configurations | Major | documentation | Arpit Agarwal | Brahma Reddy Battula | +| [YARN-4055](https://issues.apache.org/jira/browse/YARN-4055) | Report node resource utilization in heartbeat | Major | nodemanager | Inigo Goiri | Inigo Goiri | +| [HDFS-8713](https://issues.apache.org/jira/browse/HDFS-8713) | Convert DatanodeDescriptor to use SLF4J logging | Trivial | . | Andrew Wang | Andrew Wang | +| [HDFS-8883](https://issues.apache.org/jira/browse/HDFS-8883) | NameNode Metrics : Add FSNameSystem lock Queue Length | Major | namenode | Anu Engineer | Anu Engineer | +| [HDFS-6407](https://issues.apache.org/jira/browse/HDFS-6407) | Add sorting and pagination in the datanode tab of the NN Web UI | Critical | namenode | Nathan Roberts | Haohui Mai | +| [HDFS-8880](https://issues.apache.org/jira/browse/HDFS-8880) | NameNode metrics logging | Major | namenode | Arpit Agarwal | Arpit Agarwal | +| [YARN-4057](https://issues.apache.org/jira/browse/YARN-4057) | If ContainersMonitor is not enabled, only print related log info one time | Minor | nodemanager | Jun Gong | Jun Gong | +| [HADOOP-12050](https://issues.apache.org/jira/browse/HADOOP-12050) | Enable MaxInactiveInterval for hadoop http auth token | Major | security | Benoy Antony | Huizhi Lu | +| [HDFS-8435](https://issues.apache.org/jira/browse/HDFS-8435) | Support CreateFlag in WebHdfs | Major | webhdfs | Vinoth Sathappan | Jakob Homan | +| [HDFS-8911](https://issues.apache.org/jira/browse/HDFS-8911) | NameNode Metric : Add Editlog counters as a JMX metric | Major | namenode | Anu Engineer | Anu Engineer | +| [HDFS-8917](https://issues.apache.org/jira/browse/HDFS-8917) | Cleanup BlockInfoUnderConstruction from comments and tests | Minor | namenode | Zhe Zhang | Zhe Zhang | +| [HDFS-8884](https://issues.apache.org/jira/browse/HDFS-8884) | Fail-fast check in BlockPlacementPolicyDefault#chooseTarget | Major | . | Yi Liu | Yi Liu | +| [HDFS-8828](https://issues.apache.org/jira/browse/HDFS-8828) | Utilize Snapshot diff report to build diff copy list in distcp | Major | distcp, snapshots | Yufei Gu | Yufei Gu | +| [HDFS-8924](https://issues.apache.org/jira/browse/HDFS-8924) | Add pluggable interface for reading replicas in DFSClient | Major | hdfs-client | Colin P. McCabe | Colin P. McCabe | +| [HDFS-8928](https://issues.apache.org/jira/browse/HDFS-8928) | Improvements for BlockUnderConstructionFeature: ReplicaUnderConstruction as a separate class and replicas as an array | Minor | namenode | Zhe Zhang | Jing Zhao | +| [HDFS-2390](https://issues.apache.org/jira/browse/HDFS-2390) | dfsadmin -setBalancerBandwidth doesnot validate -ve value | Minor | balancer & mover | Rajit Saha | Gautam Gopalakrishnan | +| [HDFS-8865](https://issues.apache.org/jira/browse/HDFS-8865) | Improve quota initialization performance | Major | . | Kihwal Lee | Kihwal Lee | +| [HDFS-8983](https://issues.apache.org/jira/browse/HDFS-8983) | NameNode support for protected directories | Major | namenode | Arpit Agarwal | Arpit Agarwal | +| [HDFS-8946](https://issues.apache.org/jira/browse/HDFS-8946) | Improve choosing datanode storage for block placement | Major | namenode | Yi Liu | Yi Liu | +| [HDFS-8965](https://issues.apache.org/jira/browse/HDFS-8965) | Harden edit log reading code against out of memory errors | Major | . | Colin P. McCabe | Colin P. McCabe | +| [HADOOP-12368](https://issues.apache.org/jira/browse/HADOOP-12368) | Mark ViewFileSystemBaseTest and ViewFsBaseTest as abstract | Trivial | . | Andrew Wang | Andrew Wang | +| [HADOOP-12367](https://issues.apache.org/jira/browse/HADOOP-12367) | Move TestFileUtil's test resources to resources folder | Minor | . | Andrew Wang | Andrew Wang | +| [HADOOP-12369](https://issues.apache.org/jira/browse/HADOOP-12369) | Point hadoop-project/pom.xml java.security.krb5.conf within target folder | Minor | . | Andrew Wang | Andrew Wang | +| [HDFS-328](https://issues.apache.org/jira/browse/HDFS-328) | Improve fs -setrep error message for invalid replication factors | Major | namenode | Tsz Wo Nicholas Sze | Daniel Templeton | +| [HADOOP-5323](https://issues.apache.org/jira/browse/HADOOP-5323) | Trash documentation should describe its directory structure and configurations | Minor | documentation | Suman Sehgal | Weiwei Yang | +| [HDFS-9021](https://issues.apache.org/jira/browse/HDFS-9021) | Use a yellow elephant rather than a blue one in diagram | Minor | . | Andrew Wang | Andrew Wang | +| [HADOOP-12358](https://issues.apache.org/jira/browse/HADOOP-12358) | Add -safely flag to rm to prompt when deleting many files | Major | fs | Xiaoyu Yao | Xiaoyu Yao | +| [YARN-4024](https://issues.apache.org/jira/browse/YARN-4024) | YARN RM should avoid unnecessary resolving IP when NMs doing heartbeat | Major | resourcemanager | Wangda Tan | Hong Zhiguo | +| [HADOOP-12384](https://issues.apache.org/jira/browse/HADOOP-12384) | Add "-direct" flag option for fs copy so that user can choose not to create ".\_COPYING\_" file | Major | fs | Chen He | J.Andreina | +| [HDFS-9019](https://issues.apache.org/jira/browse/HDFS-9019) | Adding informative message to sticky bit permission denied exception | Minor | security | Thejas M Nair | Xiaoyu Yao | +| [HDFS-8384](https://issues.apache.org/jira/browse/HDFS-8384) | Allow NN to startup if there are files having a lease but are not under construction | Minor | namenode | Tsz Wo Nicholas Sze | Jing Zhao | +| [HDFS-8929](https://issues.apache.org/jira/browse/HDFS-8929) | Add a metric to expose the timestamp of the last journal | Major | journal-node | Akira Ajisaka | Surendra Singh Lilhore | +| [HDFS-7116](https://issues.apache.org/jira/browse/HDFS-7116) | Add a command to get the balancer bandwidth | Major | balancer & mover | Akira Ajisaka | Rakesh R | +| [YARN-4086](https://issues.apache.org/jira/browse/YARN-4086) | Allow Aggregated Log readers to handle HAR files | Major | . | Robert Kanter | Robert Kanter | +| [HDFS-8974](https://issues.apache.org/jira/browse/HDFS-8974) | Convert docs in xdoc format to markdown | Minor | documentation | Masatake Iwasaki | Masatake Iwasaki | +| [YARN-4145](https://issues.apache.org/jira/browse/YARN-4145) | Make RMHATestBase abstract so its not run when running all tests under that namespace | Minor | . | Anubhav Dhoot | Anubhav Dhoot | +| [HADOOP-12324](https://issues.apache.org/jira/browse/HADOOP-12324) | Better exception reporting in SaslPlainServer | Minor | security | Mike Yoder | Mike Yoder | +| [YARN-2005](https://issues.apache.org/jira/browse/YARN-2005) | Blacklisting support for scheduling AMs | Major | resourcemanager | Jason Lowe | Anubhav Dhoot | +| [HDFS-8829](https://issues.apache.org/jira/browse/HDFS-8829) | Make SO\_RCVBUF and SO\_SNDBUF size configurable for DataTransferProtocol sockets and allow configuring auto-tuning | Major | datanode | He Tianyi | He Tianyi | +| [HDFS-9065](https://issues.apache.org/jira/browse/HDFS-9065) | Include commas on # of files, blocks, total filesystem objects in NN Web UI | Minor | namenode | Daniel Templeton | Daniel Templeton | +| [HADOOP-12413](https://issues.apache.org/jira/browse/HADOOP-12413) | AccessControlList should avoid calling getGroupNames in isUserInList with empty groups. | Major | security | zhihai xu | zhihai xu | +| [HDFS-8953](https://issues.apache.org/jira/browse/HDFS-8953) | DataNode Metrics logging | Major | . | Kanaka Kumar Avvaru | Kanaka Kumar Avvaru | +| [YARN-4158](https://issues.apache.org/jira/browse/YARN-4158) | Remove duplicate close for LogWriter in AppLogAggregatorImpl#uploadLogsForContainers | Minor | nodemanager | zhihai xu | zhihai xu | +| [YARN-4149](https://issues.apache.org/jira/browse/YARN-4149) | yarn logs -am should provide an option to fetch all the log files | Major | client, nodemanager | Varun Vasudev | Varun Vasudev | +| [HDFS-9082](https://issues.apache.org/jira/browse/HDFS-9082) | Change the log level in WebHdfsFileSystem.initialize() from INFO to DEBUG | Minor | webhdfs | Santhosh G Nayak | Santhosh G Nayak | +| [YARN-4135](https://issues.apache.org/jira/browse/YARN-4135) | Improve the assertion message in MockRM while failing after waiting for the state. | Trivial | . | nijel | nijel | +| [MAPREDUCE-6478](https://issues.apache.org/jira/browse/MAPREDUCE-6478) | Add an option to skip cleanupJob stage or ignore cleanup failure during commitJob(). | Major | . | Junping Du | Junping Du | +| [HADOOP-12404](https://issues.apache.org/jira/browse/HADOOP-12404) | Disable caching for JarURLConnection to avoid sharing JarFile with other users when loading resource from URL in Configuration class. | Minor | conf | zhihai xu | zhihai xu | +| [HADOOP-12428](https://issues.apache.org/jira/browse/HADOOP-12428) | Fix inconsistency between log-level guards and statements | Minor | . | Jackie Chang | Jagadesh Kiran N | +| [YARN-4095](https://issues.apache.org/jira/browse/YARN-4095) | Avoid sharing AllocatorPerContext object in LocalDirAllocator between ShuffleHandler and LocalDirsHandlerService. | Major | nodemanager | zhihai xu | zhihai xu | +| [HDFS-5795](https://issues.apache.org/jira/browse/HDFS-5795) | RemoteBlockReader2#checkSuccess() shoud print error status | Trivial | . | Brandon Li | Xiao Chen | +| [HDFS-9112](https://issues.apache.org/jira/browse/HDFS-9112) | Improve error message for Haadmin when multiple name service IDs are configured | Major | tools | Anu Engineer | Anu Engineer | +| [HDFS-9132](https://issues.apache.org/jira/browse/HDFS-9132) | Pass genstamp to ReplicaAccessorBuilder | Major | hdfs-client | Colin P. McCabe | Colin P. McCabe | +| [HDFS-8873](https://issues.apache.org/jira/browse/HDFS-8873) | Allow the directoryScanner to be rate-limited | Major | datanode | Nathan Roberts | Daniel Templeton | +| [HADOOP-12442](https://issues.apache.org/jira/browse/HADOOP-12442) | Display help if the command option to "hdfs dfs " is not valid | Minor | . | nijel | nijel | +| [HADOOP-11984](https://issues.apache.org/jira/browse/HADOOP-11984) | Enable parallel JUnit tests in pre-commit. | Major | build, scripts, test | Chris Nauroth | Chris Nauroth | +| [MAPREDUCE-6471](https://issues.apache.org/jira/browse/MAPREDUCE-6471) | Document distcp incremental copy | Major | distcp | Arpit Agarwal | Neelesh Srinivas Salian | +| [HDFS-9148](https://issues.apache.org/jira/browse/HDFS-9148) | Incorrect assert message in TestWriteToReplica#testWriteToTemporary | Trivial | test | Tony Wu | Tony Wu | +| [HDFS-8859](https://issues.apache.org/jira/browse/HDFS-8859) | Improve DataNode ReplicaMap memory footprint to save about 45% | Major | datanode | Yi Liu | Yi Liu | +| [HDFS-8696](https://issues.apache.org/jira/browse/HDFS-8696) | Make the lower and higher watermark in the DN Netty server configurable | Major | webhdfs | Xiaobing Zhou | Xiaobing Zhou | +| [YARN-3727](https://issues.apache.org/jira/browse/YARN-3727) | For better error recovery, check if the directory exists before using it for localization. | Major | nodemanager | zhihai xu | zhihai xu | +| [HDFS-9175](https://issues.apache.org/jira/browse/HDFS-9175) | Change scope of 'AccessTokenProvider.getAccessToken()' and 'CredentialBasedAccessTokenProvider.getCredential()' abstract methods to public | Major | webhdfs | Santhosh G Nayak | Santhosh G Nayak | +| [HADOOP-12458](https://issues.apache.org/jira/browse/HADOOP-12458) | Retries is typoed to spell Retires in parts of hadoop-yarn and hadoop-common | Minor | documentation | Neelesh Srinivas Salian | Neelesh Srinivas Salian | +| [HDFS-9151](https://issues.apache.org/jira/browse/HDFS-9151) | Mover should print the exit status/reason on console like balancer tool. | Minor | balancer & mover | Archana T | Surendra Singh Lilhore | +| [HADOOP-12350](https://issues.apache.org/jira/browse/HADOOP-12350) | WASB Logging: Improve WASB Logging around deletes, reads and writes | Major | tools | Dushyanth | Dushyanth | +| [HADOOP-12284](https://issues.apache.org/jira/browse/HADOOP-12284) | UserGroupInformation doAs can throw misleading exception | Trivial | security | Aaron Dossett | Aaron Dossett | +| [YARN-4228](https://issues.apache.org/jira/browse/YARN-4228) | FileSystemRMStateStore use IOUtils#close instead of fs#close | Minor | . | Bibin A Chundatt | Bibin A Chundatt | +| [YARN-3943](https://issues.apache.org/jira/browse/YARN-3943) | Use separate threshold configurations for disk-full detection and disk-not-full detection. | Critical | nodemanager | zhihai xu | zhihai xu | +| [MAPREDUCE-6479](https://issues.apache.org/jira/browse/MAPREDUCE-6479) | Add missing mapred job command options in mapreduce document | Major | documentation | nijel | nijel | +| [HADOOP-11104](https://issues.apache.org/jira/browse/HADOOP-11104) | org.apache.hadoop.metrics2.lib.MetricsRegistry needs numerical parameter checking | Minor | . | Ray Chiang | Ray Chiang | +| [HDFS-9181](https://issues.apache.org/jira/browse/HDFS-9181) | Better handling of exceptions thrown during upgrade shutdown | Minor | . | Wei-Chiu Chuang | Wei-Chiu Chuang | +| [HDFS-9110](https://issues.apache.org/jira/browse/HDFS-9110) | Use Files.walkFileTree in NNUpgradeUtil#doPreUpgrade for better efficiency | Minor | . | Charlie Helin | Charlie Helin | +| [HDFS-9221](https://issues.apache.org/jira/browse/HDFS-9221) | HdfsServerConstants#ReplicaState#getState should avoid calling values() since it creates a temporary array | Major | performance | Staffan Friberg | Staffan Friberg | +| [HDFS-8988](https://issues.apache.org/jira/browse/HDFS-8988) | Use LightWeightHashSet instead of LightWeightLinkedSet in BlockManager#excessReplicateMap | Major | . | Yi Liu | Yi Liu | +| [HDFS-9139](https://issues.apache.org/jira/browse/HDFS-9139) | Enable parallel JUnit tests for HDFS Pre-commit | Major | test | Vinayakumar B | Vinayakumar B | +| [HDFS-9145](https://issues.apache.org/jira/browse/HDFS-9145) | Tracking methods that hold FSNamesytemLock for too long | Major | namenode | Jing Zhao | Mingliang Liu | +| [HADOOP-10775](https://issues.apache.org/jira/browse/HADOOP-10775) | Shell operations to fail with meaningful errors on windows if winutils.exe not found | Minor | util | Steve Loughran | Steve Loughran | +| [YARN-4253](https://issues.apache.org/jira/browse/YARN-4253) | Standardize on using PrivilegedOperationExecutor for all invocations of container-executor in LinuxContainerExecutor | Major | . | Sidharta Seethana | Sidharta Seethana | +| [YARN-4252](https://issues.apache.org/jira/browse/YARN-4252) | Log container-executor invocation details when exit code is non-zero | Minor | nodemanager | Sidharta Seethana | Sidharta Seethana | +| [HDFS-9238](https://issues.apache.org/jira/browse/HDFS-9238) | Update TestFileCreation#testLeaseExpireHardLimit() to avoid using DataNodeTestUtils#getFile() | Trivial | test | Tony Wu | Tony Wu | +| [HDFS-9188](https://issues.apache.org/jira/browse/HDFS-9188) | Make block corruption related tests FsDataset-agnostic. | Major | test | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HDFS-9205](https://issues.apache.org/jira/browse/HDFS-9205) | Do not schedule corrupt blocks for replication | Minor | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | +| [HADOOP-12481](https://issues.apache.org/jira/browse/HADOOP-12481) | JWTRedirectAuthenticationHandler doesn't Retain Original Query String | Major | security | Larry McCay | Larry McCay | +| [HDFS-9257](https://issues.apache.org/jira/browse/HDFS-9257) | improve error message for "Absolute path required" in INode.java to contain the rejected path | Trivial | namenode | Marcell Szabo | Marcell Szabo | +| [HDFS-9253](https://issues.apache.org/jira/browse/HDFS-9253) | Refactor tests of libhdfs into a directory | Major | . | Haohui Mai | Haohui Mai | +| [HADOOP-12450](https://issues.apache.org/jira/browse/HADOOP-12450) | UserGroupInformation should not log at WARN level if no groups are found | Minor | security | Elliott Clark | Elliott Clark | +| [HADOOP-12460](https://issues.apache.org/jira/browse/HADOOP-12460) | Add overwrite option for 'get' shell command | Major | . | Keegan Witt | Jagadesh Kiran N | +| [HDFS-9250](https://issues.apache.org/jira/browse/HDFS-9250) | Add Precondition check to LocatedBlock#addCachedLoc | Major | namenode | Xiao Chen | Xiao Chen | +| [HDFS-9251](https://issues.apache.org/jira/browse/HDFS-9251) | Refactor TestWriteToReplica and TestFsDatasetImpl to avoid explicitly creating Files in tests code. | Major | test | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [MAPREDUCE-6489](https://issues.apache.org/jira/browse/MAPREDUCE-6489) | Fail fast rogue tasks that write too much to local disk | Major | task | Maysam Yabandeh | Maysam Yabandeh | +| [HDFS-8647](https://issues.apache.org/jira/browse/HDFS-8647) | Abstract BlockManager's rack policy into BlockPlacementPolicy | Major | . | Ming Ma | Brahma Reddy Battula | +| [HDFS-7087](https://issues.apache.org/jira/browse/HDFS-7087) | Ability to list /.reserved | Major | . | Andrew Wang | Xiao Chen | +| [HDFS-9280](https://issues.apache.org/jira/browse/HDFS-9280) | Document NFS gateway export point parameter | Trivial | documentation | Zhe Zhang | Xiao Chen | +| [HADOOP-12334](https://issues.apache.org/jira/browse/HADOOP-12334) | Change Mode Of Copy Operation of HBase WAL Archiving to bypass Azure Storage Throttling after retries | Major | tools | Gaurav Kanade | Gaurav Kanade | +| [HADOOP-7266](https://issues.apache.org/jira/browse/HADOOP-7266) | Deprecate metrics v1 | Blocker | metrics | Luke Lu | Akira Ajisaka | +| [YARN-2913](https://issues.apache.org/jira/browse/YARN-2913) | Fair scheduler should have ability to set MaxResourceDefault for each queue | Major | . | Siqi Li | Siqi Li | +| [HDFS-9264](https://issues.apache.org/jira/browse/HDFS-9264) | Minor cleanup of operations on FsVolumeList#volumes | Minor | . | Walter Su | Walter Su | +| [HDFS-8808](https://issues.apache.org/jira/browse/HDFS-8808) | dfs.image.transfer.bandwidthPerSec should not apply to -bootstrapStandby | Major | . | Gautam Gopalakrishnan | Zhe Zhang | +| [HDFS-9297](https://issues.apache.org/jira/browse/HDFS-9297) | Update TestBlockMissingException to use corruptBlockOnDataNodesByDeletingBlockFile() | Trivial | test | Tony Wu | Tony Wu | +| [HDFS-4015](https://issues.apache.org/jira/browse/HDFS-4015) | Safemode should count and report orphaned blocks | Major | namenode | Todd Lipcon | Anu Engineer | +| [YARN-3528](https://issues.apache.org/jira/browse/YARN-3528) | Tests with 12345 as hard-coded port break jenkins | Blocker | . | Steve Loughran | Brahma Reddy Battula | +| [YARN-4285](https://issues.apache.org/jira/browse/YARN-4285) | Display resource usage as percentage of queue and cluster in the RM UI | Major | resourcemanager | Varun Vasudev | Varun Vasudev | +| [HDFS-7284](https://issues.apache.org/jira/browse/HDFS-7284) | Add more debug info to BlockInfoUnderConstruction#setGenerationStampAndVerifyReplicas | Major | namenode | Hu Liu, | Wei-Chiu Chuang | +| [HADOOP-12472](https://issues.apache.org/jira/browse/HADOOP-12472) | Make GenericTestUtils.assertExceptionContains robust | Minor | test | Steve Loughran | Steve Loughran | +| [HDFS-9291](https://issues.apache.org/jira/browse/HDFS-9291) | Fix TestInterDatanodeProtocol to be FsDataset-agnostic. | Minor | test | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HDFS-8945](https://issues.apache.org/jira/browse/HDFS-8945) | Update the description about replica placement in HDFS Architecture documentation | Minor | documentation | Masatake Iwasaki | Masatake Iwasaki | +| [HDFS-9292](https://issues.apache.org/jira/browse/HDFS-9292) | Make TestFileConcorruption independent to underlying FsDataset Implementation. | Minor | . | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HDFS-9259](https://issues.apache.org/jira/browse/HDFS-9259) | Make SO\_SNDBUF size configurable at DFSClient side for hdfs write scenario | Major | . | Ming Ma | Mingliang Liu | +| [HDFS-9299](https://issues.apache.org/jira/browse/HDFS-9299) | Give ReplicationMonitor a readable thread name | Trivial | namenode | Staffan Friberg | Staffan Friberg | +| [HDFS-9307](https://issues.apache.org/jira/browse/HDFS-9307) | fuseConnect should be private to fuse\_connect.c | Trivial | fuse-dfs | Colin P. McCabe | Mingliang Liu | +| [HADOOP-12520](https://issues.apache.org/jira/browse/HADOOP-12520) | Use XInclude in hadoop-azure test configuration to isolate Azure Storage account keys for service integration tests. | Major | fs/azure, test | Chris Nauroth | Chris Nauroth | +| [HDFS-9311](https://issues.apache.org/jira/browse/HDFS-9311) | Support optional offload of NameNode HA service health checks to a separate RPC server. | Major | ha, namenode | Chris Nauroth | Chris Nauroth | +| [HDFS-9255](https://issues.apache.org/jira/browse/HDFS-9255) | Consolidate block recovery related implementation into a single class | Minor | datanode | Walter Su | Walter Su | +| [YARN-2573](https://issues.apache.org/jira/browse/YARN-2573) | Integrate ReservationSystem with the RM failover mechanism | Major | capacityscheduler, fairscheduler, resourcemanager | Subru Krishnan | Subru Krishnan | +| [HDFS-6200](https://issues.apache.org/jira/browse/HDFS-6200) | Create a separate jar for hdfs-client | Major | build | Haohui Mai | Haohui Mai | +| [HDFS-8545](https://issues.apache.org/jira/browse/HDFS-8545) | Refactor FS#getUsed() to use ContentSummary and add an API to fetch the total file length from a specific path | Minor | . | J.Andreina | J.Andreina | +| [HDFS-9229](https://issues.apache.org/jira/browse/HDFS-9229) | Expose size of NameNode directory as a metric | Minor | namenode | Zhe Zhang | Surendra Singh Lilhore | +| [YARN-4310](https://issues.apache.org/jira/browse/YARN-4310) | FairScheduler: Log skipping reservation messages at DEBUG level | Minor | fairscheduler | Arun Suresh | Arun Suresh | +| [HDFS-9312](https://issues.apache.org/jira/browse/HDFS-9312) | Fix TestReplication to be FsDataset-agnostic. | Minor | . | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HDFS-9308](https://issues.apache.org/jira/browse/HDFS-9308) | Add truncateMeta() and deleteMeta() to MiniDFSCluster | Minor | test | Tony Wu | Tony Wu | +| [HDFS-9331](https://issues.apache.org/jira/browse/HDFS-9331) | Modify TestNameNodeMXBean#testNameNodeMXBeanInfo() to account for filesystem entirely allocated for DFS use | Trivial | test | Tony Wu | Tony Wu | +| [HDFS-9363](https://issues.apache.org/jira/browse/HDFS-9363) | Add fetchReplica() to FsDatasetTestUtils to return FsDataset-agnostic Replica. | Minor | test | Tony Wu | Tony Wu | +| [HDFS-9282](https://issues.apache.org/jira/browse/HDFS-9282) | Make data directory count and storage raw capacity related tests FsDataset-agnostic | Minor | test | Tony Wu | Tony Wu | +| [HADOOP-12344](https://issues.apache.org/jira/browse/HADOOP-12344) | Improve validateSocketPathSecurity0 error message | Trivial | net | Casey Brotherton | Casey Brotherton | +| [HDFS-9398](https://issues.apache.org/jira/browse/HDFS-9398) | Make ByteArraryManager log message in one-line format | Minor | hdfs-client | Mingliang Liu | Mingliang Liu | +| [HDFS-9234](https://issues.apache.org/jira/browse/HDFS-9234) | WebHdfs : getContentSummary() should give quota for storage types | Major | webhdfs | Surendra Singh Lilhore | Surendra Singh Lilhore | +| [HDFS-9369](https://issues.apache.org/jira/browse/HDFS-9369) | Use ctest to run tests for hadoop-hdfs-native-client | Minor | . | Haohui Mai | Haohui Mai | +| [HADOOP-12562](https://issues.apache.org/jira/browse/HADOOP-12562) | Make hadoop dockerfile usable by Yetus | Major | build | Allen Wittenauer | Allen Wittenauer | +| [YARN-4287](https://issues.apache.org/jira/browse/YARN-4287) | Capacity Scheduler: Rack Locality improvement | Major | capacityscheduler | Nathan Roberts | Nathan Roberts | +| [MAPREDUCE-5485](https://issues.apache.org/jira/browse/MAPREDUCE-5485) | Allow repeating job commit by extending OutputCommitter API | Critical | . | Nemon Lou | Junping Du | +| [MAPREDUCE-6499](https://issues.apache.org/jira/browse/MAPREDUCE-6499) | Add elapsed time for retired job in JobHistoryServer WebUI | Major | webapps | Yiqun Lin | Yiqun Lin | +| [HDFS-9252](https://issues.apache.org/jira/browse/HDFS-9252) | Change TestFileTruncate to use FsDatasetTestUtils to get block file size and genstamp. | Major | . | Lei (Eddy) Xu | Lei (Eddy) Xu | +| [HADOOP-12568](https://issues.apache.org/jira/browse/HADOOP-12568) | Update core-default.xml to describe posixGroups support | Minor | documentation | Wei-Chiu Chuang | Wei-Chiu Chuang | +| [YARN-4279](https://issues.apache.org/jira/browse/YARN-4279) | Mark ApplicationId and ApplicationAttemptId static methods as @Public, @Unstable | Minor | client | Steve Loughran | Steve Loughran | +| [HADOOP-12575](https://issues.apache.org/jira/browse/HADOOP-12575) | Add build instruction for docker toolbox instead of boot2docker | Trivial | documentation | Kai Sasaki | Kai Sasaki | +| [HDFS-8056](https://issues.apache.org/jira/browse/HDFS-8056) | Decommissioned dead nodes should continue to be counted as dead after NN restart | Major | . | Ming Ma | Ming Ma | +| [HADOOP-11901](https://issues.apache.org/jira/browse/HADOOP-11901) | BytesWritable fails to support 2G chunks due to integer overflow | Major | . | Reynold Xin | Reynold Xin | +| [HDFS-9439](https://issues.apache.org/jira/browse/HDFS-9439) | Include status of closeAck into exception message in DataNode#run | Trivial | . | Xiao Chen | Xiao Chen | +| [HDFS-9402](https://issues.apache.org/jira/browse/HDFS-9402) | Switch DataNode.LOG to use slf4j | Minor | . | Walter Su | Walter Su | +| [HDFS-3302](https://issues.apache.org/jira/browse/HDFS-3302) | Review and improve HDFS trash documentation | Major | documentation | Harsh J | | +| [HADOOP-10035](https://issues.apache.org/jira/browse/HADOOP-10035) | Cleanup TestFilterFileSystem | Major | . | Suresh Srinivas | Suresh Srinivas | +| [HADOOP-10555](https://issues.apache.org/jira/browse/HADOOP-10555) | Add offset support to MurmurHash | Trivial | . | Sergey Shelukhin | Sergey Shelukhin | +| [HADOOP-10068](https://issues.apache.org/jira/browse/HADOOP-10068) | Improve log4j regex in testFindContainingJar | Trivial | . | Robert Rati | Robert Rati | +| [HDFS-9024](https://issues.apache.org/jira/browse/HDFS-9024) | Deprecate the TotalFiles metric | Major | . | Akira Ajisaka | Akira Ajisaka | +| [HDFS-7988](https://issues.apache.org/jira/browse/HDFS-7988) | Replace usage of ExactSizeInputStream with LimitInputStream. | Minor | . | Chris Nauroth | Walter Su | +| [HDFS-9314](https://issues.apache.org/jira/browse/HDFS-9314) | Improve BlockPlacementPolicyDefault's picking of excess replicas | Major | . | Ming Ma | Xiao Chen | +| [MAPREDUCE-5870](https://issues.apache.org/jira/browse/MAPREDUCE-5870) | Support for passing Job priority through Application Submission Context in Mapreduce Side | Major | client | Sunil G | Sunil G | +| [HDFS-9434](https://issues.apache.org/jira/browse/HDFS-9434) | Recommission a datanode with 500k blocks may pause NN for 30 seconds | Major | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | +| [YARN-4132](https://issues.apache.org/jira/browse/YARN-4132) | Separate configs for nodemanager to resourcemanager connection timeout and retries | Major | nodemanager | Chang Li | Chang Li | +| [HDFS-8512](https://issues.apache.org/jira/browse/HDFS-8512) | WebHDFS : GETFILESTATUS should return LocatedBlock with storage type info | Major | webhdfs | Sumana Sathish | Xiaoyu Yao | +| [HADOOP-12600](https://issues.apache.org/jira/browse/HADOOP-12600) | FileContext and AbstractFileSystem should be annotated as a Stable interface. | Blocker | fs | Chris Nauroth | Chris Nauroth | +| [HDFS-9269](https://issues.apache.org/jira/browse/HDFS-9269) | Update the documentation and wrapper for fuse-dfs | Minor | fuse-dfs | Wei-Chiu Chuang | Wei-Chiu Chuang | +| [HDFS-9485](https://issues.apache.org/jira/browse/HDFS-9485) | Make BlockManager#removeFromExcessReplicateMap accept BlockInfo instead of Block | Minor | namenode | Mingliang Liu | Mingliang Liu | +| [HDFS-9490](https://issues.apache.org/jira/browse/HDFS-9490) | MiniDFSCluster should change block generation stamp via FsDatasetTestUtils | Minor | test | Tony Wu | Tony Wu | +| [HDFS-8831](https://issues.apache.org/jira/browse/HDFS-8831) | Trash Support for deletion in HDFS encryption zone | Major | encryption | Xiaoyu Yao | Xiaoyu Yao | +| [HDFS-9474](https://issues.apache.org/jira/browse/HDFS-9474) | TestPipelinesFailover should not fail when printing debug message | Major | . | Yongjun Zhang | John Zhuge | +| [YARN-3456](https://issues.apache.org/jira/browse/YARN-3456) | Improve handling of incomplete TimelineEntities | Minor | timelineserver | Steve Loughran | Varun Saxena | +| [HDFS-9527](https://issues.apache.org/jira/browse/HDFS-9527) | The return type of FSNamesystem.getBlockCollection should be changed to INodeFile | Minor | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze | +| [HDFS-9472](https://issues.apache.org/jira/browse/HDFS-9472) | concat() API does not give proper exception messages on ./reserved relative path | Major | namenode | Rakesh R | Rakesh R | +| [HDFS-9532](https://issues.apache.org/jira/browse/HDFS-9532) | Detailed exception info is lost in reportTo method of ErrorReportAction and ReportBadBlockAction |
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