##### General

- Overview
- Single Node Setup
- Cluster Setup
- Commands Reference
- FileSystem Shell
- Compatibility Specification
- Downstream Developer's Guide
- Admin Compatibility Guide
- Interface Classification
- FileSystem Specification

##### Common

- CLI Mini Cluster
- Native Libraries
- Proxy User
- Rack Awareness
- Secure Mode
- Service Level Authorization
- HTTP Authentication
- Credential Provider API
- Hadoop KMS
- Tracing
- Unix Shell Guide

##### HDFS

- Architecture
- User Guide
- Commands Reference
- NameNode HA With QJM
- NameNode HA With NFS
- Observer NameNode
- Federation
- ViewFs
- ViewFsOverloadScheme
- Snapshots
- Edits Viewer
- Image Viewer
- Permissions and HDFS
- Quotas and HDFS
- libhdfs (C API)
- WebHDFS (REST API)
- HttpFS
- Short Circuit Local Reads
- Centralized Cache Management
- NFS Gateway
- Rolling Upgrade
- Extended Attributes
- Transparent Encryption
- Multihoming
- Storage Policies
- Memory Storage Support
- Synthetic Load Generator
- Erasure Coding
- Disk Balancer
- Upgrade Domain
- DataNode Admin
- Router Federation
- Provided Storage

##### MapReduce

- Tutorial
- Commands Reference
- Compatibility with 1.x
- Encrypted Shuffle
- Pluggable Shuffle/Sort
- Distributed Cache Deploy
- Support for YARN Shared Cache

##### MapReduce REST APIs

- MR Application Master
- MR History Server

##### YARN

- Architecture
- Commands Reference
- Capacity Scheduler
- Fair Scheduler
- ResourceManager Restart
- ResourceManager HA
- Resource Model
- Node Labels
- Node Attributes
- Web Application Proxy
- Timeline Server
- Timeline Service V.2
- Writing YARN Applications
- YARN Application Security
- NodeManager
- Running Applications in Docker Containers
- Using CGroups
- Secure Containers
- Registry
- Reservation System
- Graceful Decommission
- Opportunistic Containers
- YARN Federation
- Shared Cache
- Using GPU
- Using FPGA
- Placement Constraints
- YARN UI2

##### YARN REST APIs

- Introduction
- Resource Manager
- Node Manager
- Timeline Server
- Timeline Service V.2

##### YARN Service

- Overview
- QuickStart
- Concepts
- Yarn Service API
- Service Discovery
- System Services

##### Submarine

- Index
- QuickStart
- Examples

##### Hadoop Compatible File Systems

- Aliyun OSS
- Amazon S3
- Azure Blob Storage
- Azure Data Lake Storage
- OpenStack Swift

##### Auth

- Overview
- Examples
- Configuration
- Building

##### Tools

- Hadoop Streaming
- Hadoop Archives
- Hadoop Archive Logs
- DistCp
- GridMix
- Rumen
- Resource Estimator Service
- Scheduler Load Simulator
- Hadoop Benchmarking

##### Reference

- Changelog and Release Notes
- Java API docs
- Unix Shell API
- Metrics

##### Configuration

- core-default.xml
- hdfs-default.xml
- hdfs-rbf-default.xml
- mapred-default.xml
- yarn-default.xml
- kms-default.xml
- httpfs-default.xml
- Deprecated Properties

# Apache Hadoop Changelog

## Release 2.1.1-beta - 2013-09-16

### INCOMPATIBLE CHANGES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-707 | Add user info in the YARN ClientToken | Blocker | . | Bikas Saha | Jason Lowe
YARN-1170 | yarn proto definitions should specify package as ‘hadoop.yarn’ | Blocker | . | Arun C Murthy | Binglin Chang
HADOOP-9944 | RpcRequestHeaderProto defines callId as uint32 while ipc.Client.CONNECTION_CONTEXT_CALL_ID is signed (-3) | Blocker | . | Arun C Murthy | Arun C Murthy

### NEW FEATURES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-9789 | Support server advertised kerberos principals | Critical | ipc, security | Daryn Sharp | Daryn Sharp
HDFS-5076 | Add MXBean methods to query NN’s transaction information and JournalNode’s journal status | Minor | . | Jing Zhao | Jing Zhao
HDFS-5118 | Provide testing support for DFSClient to drop RPC responses | Major | . | Jing Zhao | Jing Zhao

### IMPROVEMENTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-8814 | Inefficient comparison with the empty string. Use isEmpty() instead | Minor | conf, fs, fs/s3, ha, io, metrics, performance, record, security, util | Brandon Li | Brandon Li
MAPREDUCE-1981 | Improve getSplits performance by using listLocatedStatus | Major | job submission | Hairong Kuang | Hairong Kuang
HADOOP-9803 | Add generic type parameter to RetryInvocationHandler | Minor | ipc | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
YARN-758 | Augment MockNM to use multiple cores | Minor | . | Bikas Saha | Karthik Kambatla
MAPREDUCE-5367 | Local jobs all use same local working directory | Major | . | Sandy Ryza | Sandy Ryza
HDFS-5061 | Make FSNameSystem#auditLoggers an unmodifiable list | Major | namenode | Arpit Agarwal | Arpit Agarwal
HDFS-4905 | Add appendToFile command to “hdfs dfs” | Minor | tools | Arpit Agarwal | Arpit Agarwal
HADOOP-9821 | ClientId should have getMsb/getLsb methods | Minor | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa
HDFS-4926 | namenode webserver’s page has a tooltip that is inconsistent with the datanode HTML link | Trivial | namenode | Joseph Lorenzini | Vivek Ganesan
HADOOP-9833 | move slf4j to version 1.7.5 | Minor | build | Steve Loughran | Kousuke Saruta
HADOOP-9831 | Make checknative shell command accessible on Windows. | Minor | bin | Chris Nauroth | Chris Nauroth
YARN-589 | Expose a REST API for monitoring the fair scheduler | Major | scheduler | Sandy Ryza | Sandy Ryza
HADOOP-9672 | Upgrade Avro dependency to 1.7.4 | Major | . | Sandy Ryza | Sandy Ryza
HADOOP-9802 | Support Snappy codec on Windows. | Major | io | Chris Nauroth | Chris Nauroth
HADOOP-9446 | Support Kerberos HTTP SPNEGO authentication for non-SUN JDK | Major | security | Yu Gao | Yu Gao
HADOOP-9879 | Move the version info of zookeeper dependencies to hadoop-project/pom | Minor | build | Karthik Kambatla | Karthik Kambatla
HADOOP-9686 | Easy access to final parameters in Configuration | Major | conf | Jason Lowe | Jason Lowe
HADOOP-9886 | Turn warning message in RetryInvocationHandler to debug | Minor | . | Arpit Gupta | Arpit Gupta
HDFS-5045 | Add more unit tests for retry cache to cover all AtMostOnce methods | Minor | . | Jing Zhao | Jing Zhao
MAPREDUCE-5478 | TeraInputFormat unnecessarily defines its own FileSplit subclass | Minor | examples | Sandy Ryza | Sandy Ryza
YARN-1074 | Clean up YARN CLI app list to show only running apps. | Major | client | Tassapol Athiapinya | Xuan Gong
HDFS-3245 | Add metrics and web UI for cluster version summary | Major | namenode | Todd Lipcon | Ravi Prakash
HDFS-5128 | Allow multiple net interfaces to be used with HA namenode RPC server | Critical | . | Kihwal Lee | Kihwal Lee
YARN-1081 | Minor improvement to output header for $ yarn node -list | Minor | client | Tassapol Athiapinya | Akira Ajisaka
YARN-1080 | Improve help message for $ yarn logs | Major | client | Tassapol Athiapinya | Xuan Gong
YARN-1117 | Improve help message for $ yarn applications and $yarn node | Major | client | Tassapol Athiapinya | Xuan Gong
HADOOP-9918 | Add addIfService() to CompositeService | Minor | . | Karthik Kambatla | Karthik Kambatla
YARN-696 | Enable multiple states to to be specified in Resource Manager apps REST call | Major | resourcemanager | Trevor Lorimer | Trevor Lorimer
YARN-910 | Allow auxiliary services to listen for container starts and completions | Major | nodemanager | Sandy Ryza | Alejandro Abdelnur
HADOOP-9945 | HAServiceState should have a state for stopped services | Minor | ha | Karthik Kambatla | Karthik Kambatla
YARN-1137 | Add support whitelist for system users to Yarn container-executor.c | Major | nodemanager | Alejandro Abdelnur | Roman Shaposhnik
HADOOP-9962 | in order to avoid dependency divergence within Hadoop itself lets enable DependencyConvergence | Major | build | Roman Shaposhnik | Roman Shaposhnik
MAPREDUCE-5379 | Include token tracking ids in jobconf | Major | job submission, security | Sandy Ryza | Karthik Kambatla
HADOOP-9669 | Reduce the number of byte array creations and copies in XDR data manipulation | Major | nfs | Tsz Wo Nicholas Sze | Haohui Mai
HDFS-4513 | Clarify WebHDFS REST API that all JSON respsonses may contain additional properties | Minor | documentation, webhdfs | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze

### BUG FIXES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
MAPREDUCE-3193 | FileInputFormat doesn’t read files recursively in the input path dir | Major | mrv1, mrv2 | Ramgopal N | Devaraj K
MAPREDUCE-5358 | MRAppMaster throws invalid transitions for JobImpl | Major | mr-am | Devaraj K | Devaraj K
HADOOP-9435 | Support building the JNI code against the IBM JVM | Major | build | Tian Hong Wang | Tian Hong Wang
MAPREDUCE-5317 | Stale files left behind for failed jobs | Major | mrv2 | Ravi Prakash | Ravi Prakash
MAPREDUCE-5251 | Reducer should not implicate map attempt if it has insufficient space to fetch map output | Major | mrv2 | Jason Lowe | Ashwin Shankar
HADOOP-9768 | chown and chgrp reject users and groups with spaces on platforms where spaces are otherwise acceptable | Major | fs | Chris Nauroth | Chris Nauroth
MAPREDUCE-5385 | JobContext cache files api are broken | Blocker | . | Omkar Vinit Joshi | Omkar Vinit Joshi
YARN-948 | RM should validate the release container list before actually releasing them | Major | . | Omkar Vinit Joshi | Omkar Vinit Joshi
YARN-966 | The thread of ContainerLaunch#call will fail without any signal if getLocalizedResources() is called when the container is not at LOCALIZED | Major | . | Zhijie Shen | Zhijie Shen
HDFS-5043 | For HdfsFileStatus, set default value of childrenNum to -1 instead of 0 to avoid confusing applications | Major | . | Brandon Li | Brandon Li
HADOOP-9806 | PortmapInterface should check if the procedure is out-of-range | Major | nfs | Brandon Li | Brandon Li
MAPREDUCE-5428 | HistoryFileManager doesn’t stop threads when service is stopped | Major | jobhistoryserver, mrv2 | Jason Lowe | Karthik Kambatla
HADOOP-9801 | Configuration#writeXml uses platform defaulting encoding, which may mishandle multi-byte characters. | Major | conf | Chris Nauroth | Chris Nauroth
YARN-903 | DistributedShell throwing Errors in logs after successfull completion | Major | applications/distributed-shell | Abhishek Kapoor | Omkar Vinit Joshi
HDFS-5028 | LeaseRenewer throw java.util.ConcurrentModificationException when timeout | Major | . | yunjiong zhao | yunjiong zhao
MAPREDUCE-5440 | TestCopyCommitter Fails on JDK7 | Major | mrv2 | Robert Parker | Robert Parker
MAPREDUCE-5446 | TestJobHistoryEvents and TestJobHistoryParsing have race conditions | Major | mrv2, test | Jason Lowe | Jason Lowe
MAPREDUCE-5425 | Junit in TestJobHistoryServer failing in jdk 7 | Major | jobhistoryserver | Ashwin Shankar | Robert Parker
HDFS-5047 | Supress logging of full stack trace of quota and lease exceptions | Major | namenode | Kihwal Lee | Robert Parker
HADOOP-9315 | Port HADOOP-9249 hadoop-maven-plugins Clover fix to branch-2 to fix build failures | Major | build | Dennis Y | Chris Nauroth
HDFS-4993 | fsck can fail if a file is renamed or deleted | Major | . | Kihwal Lee | Robert Parker
HADOOP-9757 | Har metadata cache can grow without limit | Major | fs | Jason Lowe | Cristina L. Abad
HADOOP-9858 | Remove unused private RawLocalFileSystem#execCommand method from branch-2. | Trivial | fs | Chris Nauroth | Chris Nauroth
HADOOP-9857 | Tests block and sometimes timeout on Windows due to invalid entropy source. | Major | build, test | Chris Nauroth | Chris Nauroth
MAPREDUCE-5454 | TestDFSIO fails intermittently on JDK7 | Major | test | Karthik Kambatla | Karthik Kambatla
HDFS-5091 | Support for spnego keytab separate from the JournalNode keytab for secure HA | Minor | . | Jing Zhao | Jing Zhao
YARN-337 | RM handles killed application tracking URL poorly | Major | resourcemanager | Jason Lowe | Jason Lowe
HADOOP-9381 | Document dfs cp -f option | Trivial | . | Keegan Witt | Keegan Witt
HDFS-5055 | nn fails to download checkpointed image from snn in some setups | Blocker | namenode | Allen Wittenauer | Vinayakumar B
HDFS-4898 | BlockPlacementPolicyWithNodeGroup.chooseRemoteRack() fails to properly fallback to local rack | Minor | namenode | Eric Sirianni | Tsz Wo Nicholas Sze
HDFS-4632 | globStatus using backslash for escaping does not work on Windows | Major | test | Chris Nauroth | Chuan Liu
HDFS-5080 | BootstrapStandby not working with QJM when the existing NN is active | Major | ha, qjm | Jing Zhao | Jing Zhao
HADOOP-9868 | Server must not advertise kerberos realm | Blocker | ipc | Daryn Sharp | Daryn Sharp
HDFS-5099 | Namenode#copyEditLogSegmentsToSharedDir should close EditLogInputStreams upon finishing | Major | namenode | Chuan Liu | Chuan Liu
HDFS-5100 | TestNamenodeRetryCache fails on Windows due to incorrect cleanup | Minor | test | Chuan Liu | Chuan Liu
HDFS-5103 | TestDirectoryScanner fails on Windows | Minor | test | Chuan Liu | Chuan Liu
HDFS-5102 | Snapshot names should not be allowed to contain slash characters | Major | snapshots | Aaron T. Myers | Jing Zhao
HADOOP-9880 | SASL changes from HADOOP-9421 breaks Secure HA NN | Blocker | . | Kihwal Lee | Daryn Sharp
HDFS-5106 | TestDatanodeBlockScanner fails on Windows due to incorrect path format | Minor | test | Chuan Liu | Chuan Liu
YARN-107 | ClientRMService.forceKillApplication() should handle the non-RUNNING applications properly | Major | resourcemanager | Devaraj K | Xuan Gong
HDFS-5105 | TestFsck fails on Windows | Minor | . | Chuan Liu | Chuan Liu
YARN-643 | WHY appToken is removed both in BaseFinalTransition and AMUnregisteredTransition AND clientToken is removed in FinalTransition and not BaseFinalTransition | Major | . | Jian He | Xuan Gong
YARN-1006 | Nodes list web page on the RM web UI is broken | Major | . | Jian He | Xuan Gong
MAPREDUCE-5001 | LocalJobRunner has race condition resulting in job failures | Major | . | Brock Noland | Sandy Ryza
HDFS-5111 | Remove duplicated error message for snapshot commands when processing invalid arguments | Minor | snapshots | Jing Zhao | Jing Zhao
HDFS-4594 | WebHDFS open sets Content-Length header to what is specified by length parameter rather than how much data is actually returned. | Minor | webhdfs | Arpit Gupta | Chris Nauroth
YARN-881 | Priority#compareTo method seems to be wrong. | Major | . | Jian He | Jian He
YARN-1082 | Secure RM with recovery enabled and rm state store on hdfs fails with gss exception | Blocker | resourcemanager | Arpit Gupta | Vinod Kumar Vavilapalli
MAPREDUCE-5468 | AM recovery does not work for map only jobs | Blocker | . | Yesha Vora | Vinod Kumar Vavilapalli
HDFS-5124 | DelegationTokenSecretManager#retrievePassword can cause deadlock in NameNode | Blocker | namenode | Deepesh Khandelwal | Daryn Sharp
HADOOP-9899 | Remove the debug message added by HADOOP-8855 | Minor | security | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
MAPREDUCE-5470 | LocalJobRunner does not work on Windows. | Major | . | Chris Nauroth | Sandy Ryza
YARN-1094 | RM restart throws Null pointer Exception in Secure Env | Blocker | . | Yesha Vora | Vinod Kumar Vavilapalli
YARN-1008 | MiniYARNCluster with multiple nodemanagers, all nodes have same key for allocations | Major | nodemanager | Alejandro Abdelnur | Alejandro Abdelnur
YARN-1093 | Corrections to Fair Scheduler documentation | Major | documentation | Wing Yew Poon |
YARN-942 | In Fair Scheduler documentation, inconsistency on which properties have prefix | Major | scheduler | Sandy Ryza | Akira Ajisaka
HDFS-5132 | Deadlock in NameNode between SafeModeMonitor#run and DatanodeManager#handleHeartbeat | Blocker | namenode | Arpit Gupta | Kihwal Lee
YARN-1083 | ResourceManager should fail when yarn.nm.liveness-monitor.expiry-interval-ms is set less than heartbeat interval | Major | resourcemanager | Yesha Vora | Zhijie Shen
YARN-602 | NodeManager should mandatorily set some Environment variables into every containers that it launches | Major | . | Xuan Gong | Kenji Kikushima
YARN-994 | HeartBeat thread in AMRMClientAsync does not handle runtime exception correctly | Major | . | Xuan Gong | Xuan Gong
HADOOP-9910 | proxy server start and stop documentation wrong | Minor | . | André Kelpe |
HADOOP-9906 | Move HAZKUtil to o.a.h.util.ZKUtil and make inner-classes public | Minor | ha | Karthik Kambatla | Karthik Kambatla
YARN-1101 | Active nodes can be decremented below 0 | Major | resourcemanager | Robert Parker | Robert Parker
MAPREDUCE-5483 | revert MAPREDUCE-5357 | Major | distcp | Alejandro Abdelnur | Robert Kanter
HADOOP-9774 | RawLocalFileSystem.listStatus() return absolute paths when input path is relative on Windows | Major | fs | shanyu zhao | shanyu zhao
HDFS-5140 | Too many safemode monitor threads being created in the standby namenode causing it to fail with out of memory error | Blocker | ha | Arpit Gupta | Jing Zhao
YARN-981 | YARN/MR2/Job-history /logs link does not have correct content | Major | . | Xuan Gong | Jian He
YARN-1120 | Make ApplicationConstants.Environment.USER definition OS neutral | Minor | . | Chuan Liu | Chuan Liu
YARN-1077 | TestContainerLaunch fails on Windows | Minor | . | Chuan Liu | Chuan Liu
HDFS-5150 | Allow per NN SPN for internal SPNEGO. | Blocker | . | Kihwal Lee | Kihwal Lee
YARN-1124 | By default yarn application -list should display all the applications in a state other than FINISHED / FAILED | Blocker | . | Omkar Vinit Joshi | Xuan Gong
HADOOP-9924 | FileUtil.createJarWithClassPath() does not generate relative classpath correctly | Major | fs | shanyu zhao | shanyu zhao
HADOOP-9916 | Race condition in ipc.Client causes TestIPC timeout | Minor | . | Binglin Chang | Binglin Chang
HADOOP-9932 | Improper synchronization in RetryCache | Blocker | . | Kihwal Lee | Kihwal Lee
MAPREDUCE-5475 | MRClientService does not verify ACLs properly | Blocker | mr-am, mrv2 | Jason Lowe | Jason Lowe
HDFS-5159 | Secondary NameNode fails to checkpoint if error occurs downloading edits on first checkpoint | Major | namenode | Aaron T. Myers | Aaron T. Myers
YARN-957 | Capacity Scheduler tries to reserve the memory more than what node manager reports. | Blocker | . | Omkar Vinit Joshi | Omkar Vinit Joshi
YARN-1107 | Job submitted with Delegation token in secured environment causes RM to fail during RM restart | Blocker | resourcemanager | Arpit Gupta | Omkar Vinit Joshi
MAPREDUCE-5414 | TestTaskAttempt fails jdk7 with NullPointerException | Major | test | Nemon Lou | Nemon Lou
YARN-1144 | Unmanaged AMs registering a tracking URI should not be proxy-fied | Critical | resourcemanager | Alejandro Abdelnur | Alejandro Abdelnur
YARN-1152 | Invalid key to HMAC computation error when getting application report for completed app attempt | Blocker | resourcemanager | Jason Lowe | Jason Lowe
MAPREDUCE-5020 | Compile failure with JDK8 | Major | client | Trevor Robinson | Trevor Robinson
YARN-1025 | ResourceManager and NodeManager do not load native libraries on Windows. | Major | nodemanager, resourcemanager | Chris Nauroth | Chris Nauroth
MAPREDUCE-5497 | ‘5s sleep’ in MRAppMaster.shutDownJob is only needed before stopping ClientService | Major | . | Jian He | Jian He
HDFS-4680 | Audit logging of delegation tokens for MR tracing | Major | namenode, security | Andrew Wang | Andrew Wang
YARN-1176 | RM web services ClusterMetricsInfo total nodes doesn’t include unhealthy nodes | Critical | resourcemanager | Thomas Graves | Jonathan Eagles
MAPREDUCE-5164 | command “mapred job” and “mapred queue” omit HADOOP_CLIENT_OPTS | Major | . | Nemon Lou | Nemon Lou
YARN-1078 | TestNodeManagerResync, TestNodeManagerShutdown, and TestNodeStatusUpdater fail on Windows | Minor | . | Chuan Liu | Chuan Liu
HADOOP-9958 | Add old constructor back to DelegationTokenInformation to unbreak downstream builds | Major | . | Andrew Wang | Andrew Wang
HDFS-5192 | NameNode may fail to start when dfs.client.test.drop.namenode.response.number is set | Minor | . | Jing Zhao | Jing Zhao
YARN-1194 | TestContainerLogsPage fails with native builds | Minor | nodemanager | Roman Shaposhnik | Roman Shaposhnik
HADOOP-9960 | Upgrade Jersey version to 1.9 | Blocker | . | Brock Noland | Karthik Kambatla
YARN-1189 | NMTokenSecretManagerInNM is not being told when applications have finished | Blocker | . | Jason Lowe | Omkar Vinit Joshi
HADOOP-9557 | hadoop-client excludes commons-httpclient | Major | build | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-9961 | versions of a few transitive dependencies diverged between hadoop subprojects | Minor | build | Roman Shaposhnik | Roman Shaposhnik
MAPREDUCE-5493 | In-memory map outputs can be leaked after shuffle completes | Blocker | mrv2 | Jason Lowe | Jason Lowe
HDFS-5219 | Add configuration keys for retry policy in WebHDFSFileSystem | Major | webhdfs | Haohui Mai | Haohui Mai
HDFS-5231 | Fix broken links in the document of HDFS Federation | Minor | . | Haohui Mai | Haohui Mai
HADOOP-9977 | Hadoop services won’t start with different keypass and keystorepass when https is enabled | Major | security | Yesha Vora | Chris Nauroth
HDFS-2994 | If lease soft limit is recovered successfully the append can fail | Major | . | Todd Lipcon | Tao Luo
HDFS-5077 | NPE in FSNamesystem.commitBlockSynchronization() | Major | namenode | Konstantin Shvachko | Plamen Jeliazkov

### SUB-TASKS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HDFS-4962 | Use enum for nfs constants | Minor | nfs | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
YARN-502 | RM crash with NPE on NODE_REMOVED event with FairScheduler | Major | . | Lohit Vijayarenu | Mayank Bansal
YARN-573 | Shared data structures in Public Localizer and Private Localizer are not Thread safe. | Critical | . | Omkar Vinit Joshi | Omkar Vinit Joshi
YARN-906 | Cancelling ContainerLaunch#call at KILLING causes that the container cannot be completed | Major | . | Zhijie Shen | Zhijie Shen
HDFS-5071 | Change hdfs-nfs parent project to hadoop-project | Major | nfs | Kihwal Lee | Brandon Li
HDFS-4763 | Add script changes/utility for starting NFS gateway | Major | nfs | Brandon Li | Brandon Li
MAPREDUCE-5462 | In map-side sort, swap entire meta entries instead of indexes for better cache performance | Major | performance, task | Sandy Ryza | Sandy Ryza
HDFS-5104 | Support dotdot name in NFS LOOKUP operation | Major | nfs | Brandon Li | Brandon Li
HDFS-5107 | Fix array copy error in Readdir and Readdirplus responses | Major | nfs | Brandon Li | Brandon Li
HDFS-5110 | Change FSDataOutputStream to HdfsDataOutputStream for opened streams to fix type cast error | Major | nfs | Brandon Li | Brandon Li
HDFS-5069 | Include hadoop-nfs and hadoop-hdfs-nfs into hadoop dist for NFS deployment | Major | nfs | Brandon Li | Brandon Li
MAPREDUCE-5466 | Historyserver does not refresh the result of restarted jobs after RM restart | Blocker | . | Yesha Vora | Jian He
MAPREDUCE-5476 | Job can fail when RM restarts after staging dir is cleaned but before MR successfully unregister with RM | Blocker | . | Jian He | Jian He
HDFS-4947 | Add NFS server export table to control export by hostname or IP range | Major | nfs | Brandon Li | Jing Zhao
YARN-1085 | Yarn and MRv2 should do HTTP client authentication in kerberos setup. | Blocker | nodemanager, resourcemanager | Jaimin Jetly | Omkar Vinit Joshi
HDFS-5078 | Support file append in NFSv3 gateway to enable data streaming to HDFS | Major | nfs | Brandon Li | Brandon Li
MAPREDUCE-5441 | JobClient exit whenever RM issue Reboot command to 1st attempt App Master. | Major | applicationmaster, client | Rohith Sharma K S | Jian He
YARN-771 | AMRMClient support for resource blacklisting | Major | . | Bikas Saha | Junping Du
HDFS-5136 | MNT EXPORT should give the full group list which can mount the exports | Major | nfs | Brandon Li | Brandon Li
YARN-1049 | ContainerExistStatus should define a status for preempted containers | Blocker | api | Alejandro Abdelnur | Alejandro Abdelnur
YARN-292 | ResourceManager throws ArrayIndexOutOfBoundsException while handling CONTAINER_ALLOCATED for application attempt | Major | resourcemanager | Devaraj K | Zhijie Shen
HDFS-5085 | Refactor o.a.h.nfs to support different types of authentications | Major | nfs | Brandon Li | Jing Zhao
HDFS-5067 | Support symlink operations | Major | nfs | Brandon Li | Brandon Li
HDFS-5199 | Add more debug trace for NFS READ and WRITE | Trivial | nfs | Brandon Li | Brandon Li
YARN-1116 | Populate AMRMTokens back to AMRMTokenSecretManager after RM restarts | Major | resourcemanager | Jian He | Jian He
YARN-540 | Race condition causing RM to potentially relaunch already unregistered AMs on RM restart | Major | resourcemanager | Jian He | Jian He
YARN-1184 | ClassCastException is thrown during preemption When a huge job is submitted to a queue B whose resources is used by a job in queueA | Major | capacityscheduler, resourcemanager | J.Andreina | Chris Douglas
HDFS-5212 | Refactor RpcMessage and NFS3Response to support different types of authentication information | Major | nfs | Jing Zhao | Jing Zhao
HDFS-5234 | Move RpcFrameDecoder out of the public API | Minor | nfs | Haohui Mai | Haohui Mai
HDFS-4971 | Move IO operations out of locking in OpenFileCtx | Major | nfs | Jing Zhao | Jing Zhao
HDFS-5249 | Fix dumper thread which may die silently | Major | nfs | Brandon Li | Brandon Li

### OTHER:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-1034 | Remove “experimental” in the Fair Scheduler documentation | Trivial | documentation, scheduler | Sandy Ryza | Karthik Kambatla
YARN-1001 | YARN should provide per application-type and state statistics | Blocker | api | Srimanth Gunturi | Zhijie Shen