##### 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 0.23.3 - 2012-09-20

### INCOMPATIBLE CHANGES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
MAPREDUCE-4072 | User set java.library.path seems to overwrite default creating problems native lib loading | Major | mrv2 | Anupam Seth | Anupam Seth
MAPREDUCE-3812 | Lower default allocation sizes, fix allocation configurations and document them | Major | mrv2, performance | Vinod Kumar Vavilapalli | Harsh J
HDFS-3318 | Hftp hangs on transfers >2GB | Blocker | hdfs-client | Daryn Sharp | Daryn Sharp
MAPREDUCE-4311 | Capacity scheduler.xml does not accept decimal values for capacity and maximum-capacity settings | Major | capacity-sched, mrv2 | Thomas Graves | Karthik Kambatla
HADOOP-8551 | fs -mkdir creates parent directories without the -p option | Major | fs | Robert Joseph Evans | John George

### NEW FEATURES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HDFS-2978 | The NameNode should expose name dir statuses via JMX | Major | namenode | Aaron T. Myers | Aaron T. Myers
MAPREDUCE-3773 | Add queue metrics with buckets for job run times | Major | jobtracker | Owen O’Malley | Owen O’Malley

### IMPROVEMENTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HDFS-208 | name node should warn if only one dir is listed in dfs.name.dir | Minor | namenode | Allen Wittenauer | Uma Maheswara Rao G
MAPREDUCE-3935 | Annotate Counters.Counter and Counters.Group as @Public | Major | client | Tom White | Tom White
HADOOP-8141 | Add method to init krb5 cipher suites | Trivial | security | Todd Lipcon | Todd Lipcon
HADOOP-8242 | AbstractDelegationTokenIdentifier: add getter methods for owner and realuser | Minor | . | Colin P. McCabe | Colin P. McCabe
MAPREDUCE-4059 | The history server should have a separate pluggable storage/query interface | Major | mrv2 | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4017 | Add jobname to jobsummary log | Trivial | jobhistoryserver, jobtracker | Koji Noguchi | Thomas Graves
HADOOP-7510 | Tokens should use original hostname provided instead of ip | Major | security | Daryn Sharp | Daryn Sharp
HADOOP-8286 | Simplify getting a socket address from conf | Major | conf | Daryn Sharp | Daryn Sharp
MAPREDUCE-4151 | RM scheduler web page should filter apps to those that are relevant to scheduling | Major | mrv2, webapps | Jason Lowe | Jason Lowe
HDFS-2652 | Port token service changes from 205 | Major | . | Daryn Sharp | Daryn Sharp
MAPREDUCE-4190 | Improve web UI for task attempts userlog link | Major | mrv2, webapps | Thomas Graves | Thomas Graves
MAPREDUCE-4079 | Allow MR AppMaster to limit ephemeral port range. | Blocker | mr-am, mrv2 | Robert Joseph Evans | Robert Joseph Evans
HADOOP-8227 | Allow RPC to limit ephemeral port range. | Blocker | . | Robert Joseph Evans | Robert Joseph Evans
HADOOP-8335 | Improve Configuration’s address handling | Major | util | Daryn Sharp | Daryn Sharp
MAPREDUCE-4210 | Expose listener address for WebApp | Major | webapps | Daryn Sharp | Daryn Sharp
MAPREDUCE-4205 | retrofit all JVM shutdown hooks to use ShutdownHookManager | Major | mrv2 | Alejandro Abdelnur | Alejandro Abdelnur
MAPREDUCE-3850 | Avoid redundant calls for tokens in TokenCache | Major | security | Daryn Sharp | Daryn Sharp
HADOOP-8373 | Port RPC.getServerAddress to 0.23 | Major | ipc | Daryn Sharp | Daryn Sharp
MAPREDUCE-3659 | Host-based token support | Major | security | Daryn Sharp | Daryn Sharp
MAPREDUCE-4301 | Dedupe some strings in MRAM for memory savings | Major | applicationmaster | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-3842 | stop webpages from automatic refreshing | Critical | mrv2, webapps | Alejandro Abdelnur | Thomas Graves
MAPREDUCE-3871 | Allow symlinking in LocalJobRunner DistributedCache | Major | distributed-cache | Tom White | Tom White
HADOOP-8535 | Cut hadoop build times in half (upgrade maven-compiler-plugin to 2.5.1) | Major | build | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-3907 | Document entries mapred-default.xml for the jobhistory server. | Minor | documentation | Eugene Koontz | Eugene Koontz
MAPREDUCE-3906 | Fix inconsistency in documentation regarding mapreduce.jobhistory.principal | Trivial | documentation | Eugene Koontz | Eugene Koontz
HADOOP-8525 | Provide Improved Traceability for Configuration | Trivial | . | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4283 | Display tail of aggregated logs by default | Major | jobhistoryserver, mrv2 | Jason Lowe | Jason Lowe
HADOOP-8635 | Cannot cancel paths registered deleteOnExit | Critical | fs | Daryn Sharp | Daryn Sharp
MAPREDUCE-4375 | Show Configuration Tracability in MR UI | Major | applicationmaster | Robert Joseph Evans | Robert Joseph Evans
HADOOP-8700 | Move the checksum type constants to an enum | Minor | util | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HDFS-2421 | Improve the concurrency of SerialNumberMap in NameNode | Major | namenode | Hairong Kuang | Jing Zhao
HADOOP-8240 | Allow users to specify a checksum type on create() | Major | fs | Kihwal Lee | Kihwal Lee
HADOOP-8239 | Extend MD5MD5CRC32FileChecksum to show the actual checksum type being used | Major | fs | Kihwal Lee | Kihwal Lee
MAPREDUCE-4614 | Simplify debugging a job’s tokens | Major | client, task | Daryn Sharp | Daryn Sharp

### BUG FIXES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-7621 | alfredo config should be in a file not readable by users | Critical | security | Alejandro Abdelnur | Aaron T. Myers
HDFS-2285 | BackupNode should reject requests trying to modify namespace | Major | namenode | Konstantin Shvachko | Konstantin Shvachko
HADOOP-8104 | Inconsistent Jackson versions | Major | . | Colin P. McCabe | Alejandro Abdelnur
MAPREDUCE-3728 | ShuffleHandler can’t access results when configured in a secure mode | Critical | mrv2, nodemanager | Roman Shaposhnik | Ding Yuan
HDFS-3037 | TestMulitipleNNDataBlockScanner#testBlockScannerAfterRestart is racy | Minor | test | Aaron T. Myers | Aaron T. Myers
MAPREDUCE-3348 | mapred job -status fails to give info even if the job is present in History | Major | mrv2 | Devaraj K | Devaraj K
HADOOP-8167 | Configuration deprecation logic breaks backwards compatibility | Blocker | conf | Alejandro Abdelnur | Alejandro Abdelnur
HDFS-3067 | NPE in DFSInputStream.readBuffer if read is repeated on corrupted block | Major | hdfs-client | Henry Robinson | Henry Robinson
MAPREDUCE-4010 | TestWritableJobConf fails on trunk | Critical | mrv2 | Jason Lowe | Alejandro Abdelnur
HADOOP-8197 | Configuration logs WARNs on every use of a deprecated key | Critical | conf | Alejandro Abdelnur | Alejandro Abdelnur
MAPREDUCE-3992 | Reduce fetcher doesn’t verify HTTP status code of response | Major | mrv1 | Todd Lipcon | Todd Lipcon
MAPREDUCE-4082 | hadoop-mapreduce-client-app’s mrapp-generated-classpath file should not be in the module JAR | Critical | build | Alejandro Abdelnur | Alejandro Abdelnur
MAPREDUCE-4091 | tools testcases failing because of MAPREDUCE-4082 | Critical | build, test | Alejandro Abdelnur | Alejandro Abdelnur
MAPREDUCE-4092 | commitJob Exception does not fail job (regression in 0.23 vs 0.20) | Blocker | mrv2 | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-4089 | Hung Tasks never time out. | Blocker | mrv2 | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4024 | RM webservices can’t query on finalStatus | Major | mrv2 | Thomas Graves | Thomas Graves
MAPREDUCE-4060 | Multiple SLF4J binding warning | Major | build | Jason Lowe | Jason Lowe
MAPREDUCE-4012 | Hadoop Job setup error leaves no useful info to users (when LinuxTaskController is used) | Minor | . | Koji Noguchi | Thomas Graves
MAPREDUCE-4062 | AM Launcher thread can hang forever | Major | mrv2 | Thomas Graves | Thomas Graves
MAPREDUCE-3988 | mapreduce.job.local.dir doesn’t point to a single directory on a node. | Major | mrv2 | Vinod Kumar Vavilapalli | Eric Payne
HDFS-3166 | Hftp connections do not have a timeout | Critical | hdfs-client | Daryn Sharp | Daryn Sharp
MAPREDUCE-3999 | Tracking link gives an error if the AppMaster hasn’t started yet | Major | mrv2, webapps | Ravi Prakash | Ravi Prakash
HDFS-3176 | JsonUtil should not parse the MD5MD5CRC32FileChecksum bytes on its own. | Major | hdfs-client | Kihwal Lee | Kihwal Lee
MAPREDUCE-4020 | Web services returns incorrect JSON for deep queue tree | Major | mrv2, webapps | Jason Lowe | Anupam Seth
MAPREDUCE-3672 | Killed maps shouldn’t be counted towards JobCounter.NUM_FAILED_MAPS | Major | mr-am, mrv2 | Vinod Kumar Vavilapalli | Anupam Seth
MAPREDUCE-3682 | Tracker URL says AM tasks run on localhost | Major | mrv2 | David Capwell | Ravi Prakash
MAPREDUCE-3082 | archive command take wrong path for input file with current directory | Major | harchive | Rajit Saha | John George
MAPREDUCE-3650 | testGetTokensForHftpFS() fails | Blocker | mrv2 | Thomas Graves | Ravi Prakash
HADOOP-8088 | User-group mapping cache incorrectly does negative caching on transient failures | Major | security | Kihwal Lee | Kihwal Lee
HADOOP-8179 | risk of NPE in CopyCommands processArguments() | Minor | fs | Steve Loughran | Daryn Sharp
MAPREDUCE-4097 | tools testcases fail because missing mrapp-generated-classpath file in classpath | Major | build | Alejandro Abdelnur | Roman Shaposhnik
HADOOP-8180 | Remove hsqldb since its not needed from pom.xml | Major | . | Ravi Prakash | Ravi Prakash
HADOOP-6963 | Fix FileUtil.getDU. It should not include the size of the directory or follow symbolic links | Critical | fs | Owen O’Malley | Ravi Prakash
MAPREDUCE-3621 | TestDBJob and TestDataDrivenDBInputFormat ant tests fail | Major | mrv2 | Thomas Graves | Ravi Prakash
MAPREDUCE-4073 | CS assigns multiple off-switch containers when using multi-level-queues | Critical | mrv2, scheduler | Siddharth Seth | Siddharth Seth
HDFS-3136 | Multiple SLF4J binding warning | Major | build | Jason Lowe | Jason Lowe
HADOOP-8014 | ViewFileSystem does not correctly implement getDefaultBlockSize, getDefaultReplication, getContentSummary | Major | fs | Daryn Sharp | John George
MAPREDUCE-4117 | mapred job -status throws NullPointerException | Critical | client, mrv2 | Devaraj K | Devaraj K
MAPREDUCE-4040 | History links should use hostname rather than IP address. | Minor | jobhistoryserver, mrv2 | Bhallamudi Venkata Siva Kamesh | Bhallamudi Venkata Siva Kamesh
MAPREDUCE-4099 | ApplicationMaster may fail to remove staging directory | Critical | mrv2 | Jason Lowe | Jason Lowe
MAPREDUCE-3932 | MR tasks failing and crashing the AM when available-resources/headRoom becomes zero | Critical | mr-am, mrv2 | Vinod Kumar Vavilapalli | Robert Joseph Evans
MAPREDUCE-4140 | mapreduce classes incorrectly importing “clover.org.apache.*” classes | Major | client, mrv2 | Patrick Hunt | Patrick Hunt
HADOOP-8144 | pseudoSortByDistance in NetworkTopology doesn’t work properly if no local node and first node is local rack node | Minor | io | Junping Du | Junping Du
MAPREDUCE-4050 | Invalid node link | Major | mrv2 | Bhallamudi Venkata Siva Kamesh | Bhallamudi Venkata Siva Kamesh
MAPREDUCE-4128 | AM Recovery expects all attempts of a completed task to also be completed. | Major | mrv2 | Bikas Saha | Bikas Saha
HADOOP-8005 | Multiple SLF4J binding message in .out file for all daemons | Major | scripts | Joe Crobak | Jason Lowe
MAPREDUCE-4144 | ResourceManager NPE while handling NODE_UPDATE | Critical | mrv2 | Jason Lowe | Jason Lowe
MAPREDUCE-4156 | ant build fails compiling JobInProgress | Major | build | Thomas Graves | Thomas Graves
MAPREDUCE-4160 | some mrv1 ant tests fail with timeout - due to 4156 | Major | test | Thomas Graves | Thomas Graves
MAPREDUCE-4139 | Potential ResourceManager deadlock when SchedulerEventDispatcher is stopped | Major | mrv2 | Jason Lowe | Jason Lowe
MAPREDUCE-4074 | Client continuously retries to RM When RM goes down before launching Application Master | Major | . | Devaraj K | xieguiming
HADOOP-8288 | Remove references of mapred.child.ulimit etc. since they are not being used any more | Major | . | Ravi Prakash | Ravi Prakash
MAPREDUCE-4159 | Job is running in Uber mode after setting “mapreduce.job.ubertask.maxreduces” to zero | Major | mrv2 | Nishan Shetty | Devaraj K
MAPREDUCE-4165 | Committing is misspelled as commiting in task logs | Trivial | mrv2 | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-4129 | Lots of unneeded counters log messages | Major | mrv2 | Ahmed Radwan | Ahmed Radwan
MAPREDUCE-3947 | yarn.app.mapreduce.am.resource.mb not documented | Minor | . | Todd Lipcon | Devaraj K
HDFS-3308 | hftp/webhdfs can’t get tokens if authority has no port | Critical | webhdfs | Daryn Sharp | Daryn Sharp
MAPREDUCE-4133 | MR over viewfs is broken | Major | . | John George | John George
HDFS-3312 | Hftp selects wrong token service | Blocker | hdfs-client | Daryn Sharp | Daryn Sharp
HDFS-3321 | Error message for insufficient data nodes to come out of safemode is wrong. | Major | . | Ravi Prakash | Ravi Prakash
MAPREDUCE-4194 | ConcurrentModificationError in DirectoryCollection | Major | mrv2 | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-4169 | Container Logs appear in unsorted order | Minor | mrv2 | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-4189 | TestContainerManagerSecurity is failing | Critical | mrv2 | Devaraj K | Devaraj K
HADOOP-8305 | distcp over viewfs is broken | Major | viewfs | John George | John George
HDFS-3334 | ByteRangeInputStream leaks streams | Major | hdfs-client | Daryn Sharp | Daryn Sharp
HDFS-3331 | setBalancerBandwidth do not checkSuperuserPrivilege | Major | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
MAPREDUCE-4209 | junit dependency in hadoop-mapreduce-client is missing scope test | Major | build | Radim Kolar |
MAPREDUCE-4206 | Sorting by Last Health-Update on the RM nodes page sorts does not work correctly | Minor | mrv2 | Jonathan Eagles | Jonathan Eagles
HADOOP-8334 | HttpServer sometimes returns incorrect port | Major | . | Daryn Sharp | Daryn Sharp
HADOOP-8325 | Add a ShutdownHookManager to be used by different components instead of the JVM shutdownhook | Critical | fs | Alejandro Abdelnur | Alejandro Abdelnur
HADOOP-8330 | TestSequenceFile.testCreateUsesFsArg() is broken | Minor | test | John George | John George
MAPREDUCE-4211 | Error conditions (missing appid, appid not found) are masked in the RM app page | Minor | mrv2 | Jonathan Eagles | Jonathan Eagles
HADOOP-8317 | Update maven-assembly-plugin to 2.3 - fix build on FreeBSD | Major | build | Radim Kolar |
HADOOP-8172 | Configuration no longer sets all keys in a deprecated key list. | Critical | conf | Robert Joseph Evans | Anupam Seth
HADOOP-8342 | HDFS command fails with exception following merge of HADOOP-8325 | Major | fs | Randy Clayton | Alejandro Abdelnur
HDFS-3359 | DFSClient.close should close cached sockets | Critical | hdfs-client | Todd Lipcon | Todd Lipcon
MAPREDUCE-4048 | NullPointerException exception while accessing the Application Master UI | Major | mrv2 | Devaraj K | Devaraj K
HADOOP-8327 | distcpv2 and distcpv1 jars should not coexist | Major | . | Dave Thompson | Dave Thompson
HADOOP-8328 | Duplicate FileSystem Statistics object for ‘file’ scheme | Major | fs | Tom White | Tom White
MAPREDUCE-4220 | RM apps page starttime/endtime sorts are incorrect | Minor | mrv2 | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-4226 | ConcurrentModificationException in FileSystemCounterGroup | Major | mrv2 | Tom White | Tom White
HADOOP-8341 | Fix or filter findbugs issues in hadoop-tools | Major | . | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4215 | RM app page shows 500 error on appid parse error | Major | mrv2 | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-4237 | TestNodeStatusUpdater can fail if localhost has a domain associated with it | Major | . | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4233 | NPE can happen in RMNMNodeInfo. | Critical | . | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4238 | mavenize data_join | Critical | mrv2 | Thomas Graves | Thomas Graves
HADOOP-8393 | hadoop-config.sh missing variable exports, causes Yarn jobs to fail with ClassNotFoundException MRAppMaster | Major | scripts | Patrick Hunt | Patrick Hunt
MAPREDUCE-4250 | hadoop-config.sh missing variable exports, causes Yarn jobs to fail with ClassNotFoundException MRAppMaster | Major | nodemanager | Patrick Hunt | Patrick Hunt
MAPREDUCE-4102 | job counters not available in Jobhistory webui for killed jobs | Major | webapps | Thomas Graves | Bhallamudi Venkata Siva Kamesh
MAPREDUCE-4264 | Got ClassCastException when using mapreduce.history.server.delegationtoken.required=true | Blocker | mrv2 | Thomas Graves | Thomas Graves
MAPREDUCE-3543 | Mavenize Gridmix. | Critical | mrv2 | Mahadev konar | Thomas Graves
MAPREDUCE-4197 | Include the hsqldb jar in the hadoop-mapreduce tar file | Major | . | Ravi Prakash | Ravi Prakash
MAPREDUCE-4269 | documentation: Gridmix has javadoc warnings in StressJobFactory | Major | mrv2 | Jonathan Eagles | Jonathan Eagles
MAPREDUCE-3870 | Invalid App Metrics | Major | mrv2 | Bhallamudi Venkata Siva Kamesh | Bhallamudi Venkata Siva Kamesh
MAPREDUCE-4152 | map task left hanging after AM dies trying to connect to RM | Major | mrv2 | Thomas Graves | Thomas Graves
MAPREDUCE-4297 | Usersmap file in gridmix should not fail on empty lines | Major | contrib/gridmix | Ravi Prakash | Ravi Prakash
HDFS-3486 | offlineimageviewer can’t read fsimage files that contain persistent delegation tokens | Minor | security, tools | Colin P. McCabe | Colin P. McCabe
MAPREDUCE-4302 | NM goes down if error encountered during log aggregation | Critical | nodemanager | Daryn Sharp | Daryn Sharp
HDFS-3442 | Incorrect count for Missing Replicas in FSCK report | Minor | . | suja s | Andrew Wang
MAPREDUCE-4307 | TeraInputFormat calls FileSystem.getDefaultBlockSize() without a Path - Failure when using ViewFileSystem | Major | mrv2 | Ahmed Radwan | Ahmed Radwan
HADOOP-8450 | Remove src/test/system | Trivial | test | Colin P. McCabe | Eli Collins
MAPREDUCE-3350 | Per-app RM page should have the list of application-attempts like on the app JHS page | Critical | mrv2, webapps | Vinod Kumar Vavilapalli | Jonathan Eagles
MAPREDUCE-3927 | Shuffle hang when set map.failures.percent | Critical | mrv2 | MengWang | Bhallamudi Venkata Siva Kamesh
HADOOP-8501 | Gridmix fails to compile on OpenJDK7u4 | Major | benchmarks | Radim Kolar | Radim Kolar
HADOOP-8495 | Update Netty to avoid leaking file descriptors during shuffle | Critical | build | Jason Lowe | Jason Lowe
MAPREDUCE-4341 | add types to capacity scheduler properties documentation | Major | capacity-sched, mrv2 | Thomas Graves | Karthik Kambatla
MAPREDUCE-4267 | mavenize pipes | Critical | mrv2 | Thomas Graves | Thomas Graves
MAPREDUCE-4270 | data_join test classes are in the wrong packge | Major | mrv2 | Brock Noland | Thomas Graves
MAPREDUCE-3889 | job client tries to use /tasklog interface, but that doesn’t exist anymore | Critical | mrv2 | Thomas Graves | Devaraj K
MAPREDUCE-4320 | gridmix mainClass wrong in pom.xml | Major | contrib/gridmix | Thomas Graves | Thomas Graves
MAPREDUCE-4295 | RM crashes due to DNS issue | Critical | mrv2, resourcemanager | Thomas Graves | Thomas Graves
MAPREDUCE-4031 | Node Manager hangs on shut down | Critical | mrv2, nodemanager | Devaraj K | Devaraj K
MAPREDUCE-4361 | Fix detailed metrics for protobuf-based RPC on 0.23 | Major | mrv2 | Jason Lowe | Jason Lowe
MAPREDUCE-4290 | JobStatus.getState() API is giving ambiguous values | Major | mrv2 | Nishan Shetty | Devaraj K
MAPREDUCE-2289 | Permissions race can make getStagingDir fail on local filesystem | Major | job submission | Todd Lipcon | Ahmed Radwan
HADOOP-8129 | ViewFileSystemTestSetup setupForViewFileSystem is erring when the user’s home directory is somewhere other than /home (eg. /User) etc. | Major | fs, test | Ravi Prakash | Ahmed Radwan
MAPREDUCE-4228 | mapreduce.job.reduce.slowstart.completedmaps is not working properly to delay the scheduling of the reduce tasks | Major | applicationmaster, mrv2 | Jason Lowe | Jason Lowe
MAPREDUCE-4372 | Deadlock in Resource Manager between SchedulerEventDispatcher.EventProcessor and Shutdown hook manager | Major | mrv2, resourcemanager | Devaraj K | Devaraj K
MAPREDUCE-4376 | TestClusterMRNotification times out | Major | mrv2, test | Jason Lowe | Kihwal Lee
HADOOP-8110 | TestViewFsTrash occasionally fails | Major | fs | Tsz Wo Nicholas Sze | Jason Lowe
HDFS-3581 | FSPermissionChecker#checkPermission sticky bit check missing range check | Major | namenode | Eli Collins | Eli Collins
MAPREDUCE-4392 | Counters.makeCompactString() changed behavior from 0.20 | Major | mrv2 | Jason Lowe | Jason Lowe
MAPREDUCE-4384 | Race conditions in IndexCache | Major | nodemanager | Kihwal Lee | Kihwal Lee
MAPREDUCE-4387 | RM gets fatal error and exits during TestRM | Major | resourcemanager | Kihwal Lee | Kihwal Lee
MAPREDUCE-4379 | Node Manager throws java.lang.OutOfMemoryError: Java heap space due to org.apache.hadoop.fs.LocalDirAllocator.contexts | Blocker | mrv2, nodemanager | Devaraj K | Devaraj K
HDFS-3591 | Backport HDFS-3357 to branch-0.23 | Major | . | Robert Joseph Evans | Robert Joseph Evans
HDFS-3603 | Decouple TestHDFSTrash from TestTrash | Major | test | Jason Lowe | Jason Lowe
MAPREDUCE-4402 | TestFileInputFormat fails intermittently | Major | test | Jason Lowe | Jason Lowe
MAPREDUCE-4300 | OOM in AM can turn it into a zombie. | Major | applicationmaster | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4252 | MR2 job never completes with 1 pending task | Major | mrv2 | Tom White | Tom White
HADOOP-8573 | Configuration tries to read from an inputstream resource multiple times. | Major | conf | Robert Joseph Evans | Robert Joseph Evans
HADOOP-8587 | HarFileSystem access of harMetaCache isn’t threadsafe | Minor | fs | Eli Collins | Eli Collins
MAPREDUCE-4419 | ./mapred queue -info <queuename> -showJobs displays all the jobs irrespective of <queuename> | Major | mrv2 | Nishan Shetty | Devaraj K
MAPREDUCE-4299 | Terasort hangs with MR2 FifoScheduler | Major | mrv2 | Tom White | Tom White
HADOOP-8543 | Invalid pom.xml files on 0.23 branch | Major | build | Radim Kolar | Radim Kolar
MAPREDUCE-4395 | Possible NPE at ClientDistributedCacheManager#determineTimestamps | Critical | distributed-cache, job submission, mrv2 | Bhallamudi Venkata Siva Kamesh | Bhallamudi Venkata Siva Kamesh
HDFS-3622 | Backport HDFS-3541 to branch-0.23 | Major | . | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4437 | Race in MR ApplicationMaster can cause reducers to never be scheduled | Critical | applicationmaster, mrv2 | Jason Lowe | Jason Lowe
HADOOP-8599 | Non empty response from FileSystem.getFileBlockLocations when asking for data beyond the end of file | Major | fs | Andrey Klochkov | Andrey Klochkov
MAPREDUCE-4449 | Incorrect MR_HISTORY_STORAGE property name in JHAdminConfig | Major | mrv2 | Ahmed Radwan | Ahmed Radwan
MAPREDUCE-4448 | Nodemanager crashes upon application cleanup if aggregation failed to start | Critical | mrv2, nodemanager | Jason Lowe | Jason Lowe
HDFS-3646 | LeaseRenewer can hold reference to inactive DFSClient instances forever | Critical | hdfs-client | Kihwal Lee | Kihwal Lee
HDFS-3577 | WebHdfsFileSystem can not read files larger than 24KB | Blocker | webhdfs | Alejandro Abdelnur | Tsz Wo Nicholas Sze
HDFS-3597 | SNN can fail to start on upgrade | Minor | namenode | Andy Isaacson | Andy Isaacson
HDFS-3688 | Namenode loses datanode hostname if datanode re-registers | Major | datanode | Jason Lowe | Jason Lowe
MAPREDUCE-3893 | allow capacity scheduler configs maximum-applications and maximum-am-resource-percent configurable on a per queue basis | Critical | mrv2 | Thomas Graves | Thomas Graves
HADOOP-8606 | FileSystem.get may return the wrong filesystem | Major | fs | Daryn Sharp | Daryn Sharp
MAPREDUCE-4467 | IndexCache failures due to missing synchronization | Critical | nodemanager | Andrey Klochkov | Kihwal Lee
MAPREDUCE-4423 | Potential infinite fetching of map output | Critical | mrv2 | Robert Joseph Evans | Robert Joseph Evans
HDFS-3696 | Create files with WebHdfsFileSystem goes OOM when file size is big | Critical | webhdfs | Kihwal Lee | Tsz Wo Nicholas Sze
HADOOP-8613 | AbstractDelegationTokenIdentifier#getUser() should set token auth type | Critical | . | Daryn Sharp | Daryn Sharp
HADOOP-8627 | FS deleteOnExit may delete the wrong path | Critical | fs | Daryn Sharp | Daryn Sharp
HADOOP-8634 | Ensure FileSystem#close doesn’t squawk for deleteOnExit paths | Critical | fs | Daryn Sharp | Daryn Sharp
HADOOP-8550 | hadoop fs -touchz automatically created parent directories | Major | fs | Robert Joseph Evans | John George
MAPREDUCE-4456 | LocalDistributedCacheManager can get an ArrayIndexOutOfBounds when creating symlinks | Major | mrv2 | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4496 | AM logs link is missing user name | Major | applicationmaster, mrv2 | Jason Lowe | Jason Lowe
HADOOP-8637 | FilterFileSystem#setWriteChecksum is broken | Critical | fs | Daryn Sharp | Daryn Sharp
MAPREDUCE-4493 | Distibuted Cache Compatability Issues | Critical | mrv2 | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4492 | Configuring total queue capacity between 100.5 and 99.5 at perticular level is sucessfull | Minor | mrv2 | Nishan Shetty | Mayank Bansal
HADOOP-8370 | Native build failure: javah: class file for org.apache.hadoop.classification.InterfaceAudience not found | Major | native | Trevor Robinson | Trevor Robinson
MAPREDUCE-4457 | mr job invalid transition TA_TOO_MANY_FETCH_FAILURE at FAILED | Critical | mrv2 | Thomas Graves | Robert Joseph Evans
MAPREDUCE-4444 | nodemanager fails to start when one of the local-dirs is bad | Blocker | nodemanager | Nathan Roberts | Jason Lowe
HADOOP-8633 | Interrupted FsShell copies may leave tmp files | Critical | fs | Daryn Sharp | Daryn Sharp
MAPREDUCE-4504 | SortValidator writes to wrong directory | Major | mrv2 | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-3782 | teragen terasort jobs fail when using webhdfs:// | Critical | mrv2 | Arpit Gupta | Jason Lowe
YARN-14 | Symlinks to peer distributed cache files no longer work | Major | nodemanager | Jason Lowe | Jason Lowe
MAPREDUCE-4053 | Counters group names deprecation is wrong, iterating over group names deprecated names don’t show up | Major | mrv2 | Alejandro Abdelnur | Robert Joseph Evans
HDFS-3718 | Datanode won’t shutdown because of runaway DataBlockScanner thread | Critical | datanode | Kihwal Lee | Kihwal Lee
HDFS-3794 | WebHDFS Open used with Offset returns the original (and incorrect) Content Length in the HTTP Header. | Major | webhdfs | Ravi Prakash | Ravi Prakash
HADOOP-8703 | distcpV2: turn CRC checking off for 0 byte size | Major | . | Dave Thompson | Dave Thompson
MAPREDUCE-4562 | Support for “FileSystemCounter” legacy counter group name for compatibility reasons is creating incorrect counter name | Major | . | Jarek Jarcec Cecho | Jarek Jarcec Cecho
HADOOP-8390 | TestFileSystemCanonicalization fails with JDK7 | Major | test | Trevor Robinson | Trevor Robinson
HDFS-3788 | distcp can’t copy large files using webhdfs due to missing Content-Length header | Critical | webhdfs | Eli Collins | Tsz Wo Nicholas Sze
HADOOP-8692 | TestLocalDirAllocator fails intermittently with JDK7 | Major | test | Trevor Robinson | Trevor Robinson
HADOOP-8693 | TestSecurityUtil fails intermittently with JDK7 | Major | test | Trevor Robinson | Trevor Robinson
HADOOP-8697 | TestWritableName fails intermittently with JDK7 | Major | test | Trevor Robinson | Trevor Robinson
YARN-25 | remove old aggregated logs | Major | . | Thomas Graves | Robert Joseph Evans
HADOOP-8695 | TestPathData fails intermittently with JDK7 | Major | test | Trevor Robinson | Trevor Robinson
HADOOP-7967 | Need generalized multi-token filesystem support | Critical | fs, security | Daryn Sharp | Daryn Sharp
YARN-27 | Failed refreshQueues due to misconfiguration prevents further refreshing of queues | Major | . | Ramya Sunil | Arun C Murthy
YARN-58 | NM leaks filesystems | Critical | nodemanager | Daryn Sharp | Jason Lowe
HADOOP-8611 | Allow fall-back to the shell-based implementation when JNI-based users-group mapping fails | Major | security | Kihwal Lee | Robert Parker
MAPREDUCE-3506 | Calling getPriority on JobInfo after parsing a history log with JobHistoryParser throws a NullPointerException | Minor | client, mrv2 | Ratandeep Ratti | Jason Lowe
MAPREDUCE-4570 | ProcfsBasedProcessTree#constructProcessInfo() prints a warning if procfsDir/<pid>/stat is not found. | Minor | mrv2 | Ahmed Radwan | Ahmed Radwan
MAPREDUCE-4068 | Jars in lib subdirectory of the submittable JAR are not added to the classpath | Blocker | mrv2 | Ahmed Radwan | Robert Kanter
HDFS-3841 | Port HDFS-3835 to branch-0.23 | Major | . | Robert Joseph Evans | Robert Joseph Evans
HADOOP-8225 | DistCp fails when invoked by Oozie | Blocker | security | Mithun Radhakrishnan | Daryn Sharp
MAPREDUCE-2374 | “Text File Busy” errors launching MR tasks | Major | . | Todd Lipcon | Andy Isaacson
HADOOP-8709 | globStatus changed behavior from 0.20/1.x | Critical | fs | Jason Lowe | Jason Lowe
HADOOP-8725 | MR is broken when security is off | Blocker | security | Daryn Sharp | Daryn Sharp
HDFS-3177 | Allow DFSClient to find out and use the CRC type being used for a file. | Major | datanode, hdfs-client | Kihwal Lee | Kihwal Lee
HADOOP-8060 | Add a capability to discover and set checksum types per file. | Major | fs, util | Kihwal Lee | Kihwal Lee
YARN-31 | TestDelegationTokenRenewer fails on jdk7 | Major | . | Thomas Graves | Thomas Graves
MAPREDUCE-4600 | TestTokenCache.java from MRV1 no longer compiles | Critical | . | Robert Joseph Evans | Daryn Sharp
HADOOP-8614 | IOUtils#skipFully hangs forever on EOF | Minor | . | Colin P. McCabe | Colin P. McCabe
HDFS-3861 | Deadlock in DFSClient | Blocker | hdfs-client | Kihwal Lee | Kihwal Lee
HADOOP-8726 | The Secrets in Credentials are not available to MR tasks | Major | security | Benoy Antony | Daryn Sharp
MAPREDUCE-4569 | TestHsWebServicesJobsQuery fails on jdk7 | Major | . | Thomas Graves | Thomas Graves
YARN-63 | RMNodeImpl is missing valid transitions from the UNHEALTHY state | Major | resourcemanager | Jason Lowe | Jason Lowe
HADOOP-8727 | Gracefully deprecate dfs.umaskmode in 2.x onwards | Major | conf | Harsh J | Harsh J
YARN-66 | aggregated logs permissions not set properly | Critical | nodemanager | Thomas Graves | Thomas Graves
MAPREDUCE-4612 | job summary file permissions not set when its created | Critical | . | Thomas Graves | Thomas Graves
MAPREDUCE-4611 | MR AM dies badly when Node is decomissioned | Critical | . | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4604 | In mapred-default, mapreduce.map.maxattempts & mapreduce.reduce.maxattempts defaults are set to 4 as well as mapreduce.job.maxtaskfailures.per.tracker. | Critical | mrv2 | Ravi Prakash | Ravi Prakash
HDFS-3873 | Hftp assumes security is disabled if token fetch fails | Major | hdfs-client | Daryn Sharp | Daryn Sharp
HDFS-3852 | TestHftpDelegationToken is broken after HADOOP-8225 | Major | hdfs-client, security | Aaron T. Myers | Daryn Sharp
YARN-68 | NodeManager will refuse to shutdown indefinitely due to container log aggregation | Major | nodemanager | patrick white | Daryn Sharp
YARN-87 | NM ResourceLocalizationService does not set permissions of local cache directories | Critical | nodemanager | Jason Lowe | Jason Lowe
HDFS-3890 | filecontext mkdirs doesn’t apply umask as expected | Critical | . | Thomas Graves | Thomas Graves
MAPREDUCE-4633 | history server doesn’t set permissions on all subdirs | Critical | jobhistoryserver | Thomas Graves | oss.wakayama
MAPREDUCE-4641 | Exception in commitJob marks job as successful in job history | Major | mrv2 | Jason Lowe | Jason Lowe

### TESTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HDFS-2505 | Add a test to verify getFileChecksum works with ViewFS | Minor | test | Ravi Prakash | Ravi Prakash
MAPREDUCE-3983 | TestTTResourceReporting can fail, and should just be deleted | Major | mrv1 | Robert Joseph Evans | Ravi Prakash
HADOOP-8283 | Allow tests to control token service value | Major | test | Daryn Sharp | Daryn Sharp
HDFS-3258 | Test for HADOOP-8144 (pseudoSortByDistance in NetworkTopology for first rack local node) | Major | test | Eli Collins | Junping Du
MAPREDUCE-4212 | TestJobClientGetJob sometimes fails | Major | test | Daryn Sharp | Daryn Sharp

### SUB-TASKS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HDFS-3168 | Clean up FSNamesystem and BlockManager | Major | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
MAPREDUCE-3942 | Randomize master key generation for ApplicationTokenSecretManager and roll it every so often | Major | mrv2, security | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli
MAPREDUCE-3972 | Locking and exception issues in JobHistory Server. | Major | mrv2 | Robert Joseph Evans | Robert Joseph Evans
MAPREDUCE-4161 | create sockets consistently | Major | client, mrv2 | Daryn Sharp | Daryn Sharp
MAPREDUCE-3613 | web service calls header contains 2 content types | Critical | mrv2 | Thomas Graves | Thomas Graves
MAPREDUCE-4163 | consistently set the bind address | Major | mrv2 | Daryn Sharp | Daryn Sharp
MAPREDUCE-4162 | Correctly set token service | Major | client, mrv2 | Daryn Sharp | Daryn Sharp
MAPREDUCE-3940 | ContainerTokens should have an expiry interval | Major | mrv2, security | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli
YARN-39 | RM-NM secret-keys should be randomly generated and rolled every so often | Critical | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli
YARN-60 | NMs rejects all container tokens after secret key rolls | Blocker | nodemanager | Daryn Sharp | Vinod Kumar Vavilapalli

### OTHER:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
MAPREDUCE-4051 | Remove the empty hadoop-mapreduce-project/assembly/all.xml file | Major | . | Ravi Prakash | Ravi Prakash
MAPREDUCE-4134 | Remove references of mapred.child.ulimit etc. since they are not being used any more | Major | mrv2 | Ravi Prakash | Ravi Prakash
YARN-1 | Move YARN out of hadoop-mapreduce | Major | . | Arun C Murthy | Arun C Murthy