##### 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 0.18.0 - 2008-08-22

### INCOMPATIBLE CHANGES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-2585 | Automatic namespace recovery from the secondary image. | Major | . | Konstantin Shvachko | Konstantin Shvachko
HADOOP-2703 | New files under lease (before close) still shows up as MISSING files/blocks in fsck | Minor | . | Koji Noguchi | Lohit Vijayarenu
HADOOP-2865 | FsShell.ls() should print file attributes first then the path name. | Major | . | Konstantin Shvachko | Edward J. Yoon
HADOOP-3283 | Need a mechanism for data nodes to update generation stamps. | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-2797 | Withdraw CRC upgrade from HDFS | Critical | . | Robert Chansler | Raghu Angadi
HADOOP-544 | Replace the job, tip and task ids with objects. | Major | . | Owen O’Malley | Enis Soztutar
HADOOP-2188 | RPC should send a ping rather than use client timeouts | Major | ipc | Owen O’Malley | Hairong Kuang
HADOOP-2181 | Input Split details for maps should be logged | Minor | . | Lohit Vijayarenu | Amareshwari Sriramadasu
HADOOP-3317 | add default port for hdfs namenode | Minor | . | Doug Cutting | Doug Cutting
HADOOP-3226 | Run combiner when merging spills from map output | Major | . | Chris Douglas | Chris Douglas
HADOOP-3329 | DatanodeDescriptor objects stored in FSImage may be out dated. | Major | . | Tsz Wo Nicholas Sze | dhruba borthakur
HADOOP-2065 | Replication policy for corrupted block | Major | . | Koji Noguchi | Lohit Vijayarenu
HADOOP-1702 | Reduce buffer copies when data is written to DFS | Major | . | Raghu Angadi | Raghu Angadi
HADOOP-2656 | Support for upgrading existing cluster to facilitate appends to HDFS files | Major | . | dhruba borthakur | dhruba borthakur
HADOOP-3390 | Remove deprecated ClientProtocol.abandonFileInProgress() | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3405 | Make mapred internal classes package-local | Major | . | Enis Soztutar | Enis Soztutar
HADOOP-3035 | Data nodes should inform the name-node about block crc errors. | Major | . | Konstantin Shvachko | Lohit Vijayarenu
HADOOP-3265 | Remove deprecated API getFileCacheHints | Major | fs | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3310 | Lease recovery for append | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3417 | JobClient should not have a static configuration for cli parsing | Major | . | Owen O’Malley | Amareshwari Sriramadasu
HADOOP-2909 | Improve IPC idle connection management | Major | ipc | Hairong Kuang | Hairong Kuang
HADOOP-3486 | Change default for initial block report to 0 sec and document it in hadoop-defaults.xml | Major | . | Sanjay Radia | Sanjay Radia
HADOOP-3459 | Change dfs -ls listing to closely match format on Linux | Major | . | Mukund Madhugiri | Mukund Madhugiri
HADOOP-3113 | DFSOututStream.flush() should flush data to real block file on DataNode. | Major | . | dhruba borthakur | dhruba borthakur
HADOOP-3452 | fsck exit code would be better if non-zero when FS corrupt | Minor | . | Pete Wyckoff | Lohit Vijayarenu
HADOOP-3095 | Validating input paths and creating splits is slow on S3 | Major | fs, fs/s3 | Tom White | Tom White
HADOOP-3483 | [HOD] Improvements with cluster directory handling | Major | contrib/hod | Hemanth Yamijala | Hemanth Yamijala
HADOOP-3184 | HOD gracefully exclude “bad” nodes during ring formation | Major | contrib/hod | Marco Nicosia | Hemanth Yamijala
HADOOP-3193 | Discovery of corrupt block reported in name node log | Minor | . | Robert Chansler | Chris Douglas
HADOOP-3512 | Split map/reduce tools into separate jars | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-3379 | Document the “stream.non.zero.exit.status.is.failure” knob for streaming | Blocker | documentation | Arun C Murthy | Amareshwari Sriramadasu
HADOOP-3569 | KFS input stream read() returns 4 bytes instead of 1 | Minor | . | Sriram Rao | Sriram Rao
HADOOP-3598 | Map-Reduce framework needlessly creates temporary _${taskid} directories for Maps | Blocker | . | Arun C Murthy | Arun C Murthy
HADOOP-3610 | [HOD] HOD does not automatically create a cluster directory for the script option | Blocker | contrib/hod | Hemanth Yamijala | Vinod Kumar Vavilapalli
HADOOP-3665 | WritableComparator newKey() fails for NullWritable | Minor | io | Lukas Vlcek | Chris Douglas
HADOOP-3683 | Hadoop dfs metric FilesListed shows number of files listed instead of operations | Major | metrics | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3703 | [HOD] logcondense needs to use the new pattern of output in hadoop dfs -lsr | Blocker | contrib/hod | Hemanth Yamijala | Vinod Kumar Vavilapalli
HADOOP-3808 | [HOD] Include job tracker RPC in notes attribute after job submission | Blocker | contrib/hod | Hemanth Yamijala | Hemanth Yamijala
HADOOP-3837 | hadop streaming does not use progress reporting to detect hung tasks | Major | . | dhruba borthakur | dhruba borthakur

### NEW FEATURES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-3074 | URLStreamHandler for the DFS | Major | util | Christophe Taton | Christophe Taton
HADOOP-3061 | Writable for single byte and double | Major | io | Andrzej Bialecki | Andrzej Bialecki
HADOOP-3221 | Need a “LineBasedTextInputFormat” | Major | . | Milind Bhandarkar | Amareshwari Sriramadasu
HADOOP-3336 | Direct a subset of namenode RPC events for audit logging | Major | . | Chris Douglas | Chris Douglas
HADOOP-1915 | adding counters methods using String (as opposed to Enum) | Minor | . | Alejandro Abdelnur | Tom White
HADOOP-3246 | FTP client over HDFS | Major | util | Ankur | Ankur
HADOOP-3250 | Extend FileSystem API to allow appending to files | Major | fs | dhruba borthakur | Tsz Wo Nicholas Sze
HADOOP-1328 | Hadoop Streaming needs to provide a way for the stream plugin to update global counters | Major | . | Runping Qi | Tom White
HADOOP-3187 | Quotas for name space management | Major | . | Robert Chansler | Hairong Kuang
HADOOP-3307 | Archives in Hadoop. | Major | fs | Mahadev konar | Mahadev konar
HADOOP-3460 | SequenceFileAsBinaryOutputFormat | Minor | . | Koji Noguchi | Koji Noguchi
HADOOP-3230 | Add command line access to named counters | Major | scripts | Tom White | Tom White
HADOOP-930 | Add support for reading regular (non-block-based) files from S3 in S3FileSystem | Major | fs | Tom White | Tom White
HADOOP-3022 | Fast Cluster Restart | Major | . | Robert Chansler | Konstantin Shvachko
HADOOP-3502 | Quota API needs documentation in Forrest | Major | . | Hairong Kuang | Hairong Kuang
HADOOP-3188 | compaction utility for directories | Major | . | Robert Chansler | Robert Chansler

### IMPROVEMENTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-3254 | FSNamesystem.gotHeartbeat(…, Object[] xferResults, Object[] deleteList) should not use Object[] as pass-by-reference parameters | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3274 | The default constructor of BytesWritable should not create a 100-byte array. | Minor | io | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-2910 | Throttle IPC Client/Server during bursts of requests or server slowdown | Major | ipc | Hairong Kuang | Hairong Kuang
HADOOP-3270 | Constant DatanodeCommand should be stored in static fianl immutable variables. | Minor | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3164 | Use FileChannel.transferTo() when data is read from DataNode. | Major | . | Raghu Angadi | Raghu Angadi
HADOOP-3295 | Allow TextOutputFormat to use configurable separators | Minor | io | Zheng Shao | Zheng Shao
HADOOP-3308 | Improve QuickSort by excluding values eq the pivot from the partition | Major | . | Chris Douglas | Chris Douglas
HADOOP-2857 | libhdfs: no way to set JVM args other than classpath | Minor | . | Craig Macdonald | Craig Macdonald
HADOOP-2461 | Configuration should trim property names and accept decimal, hexadecimal, and octal numbers | Minor | conf | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-2799 | Replace org.apache.hadoop.io.Closeable with java.io.Closeable | Minor | io | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3345 | Enhance the hudson-test-patch target | Minor | build | Nigel Daley | Nigel Daley
HADOOP-3144 | better fault tolerance for corrupted text files | Major | . | Joydeep Sen Sarma | Zheng Shao
HADOOP-3334 | Move lease handling codes out from FSNamesystem | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-2019 | DistributedFileCache should support .tgz files in addition to jars and zip files | Major | . | Owen O’Malley | Amareshwari Sriramadasu
HADOOP-3058 | Hadoop DFS to report more replication metrics | Minor | metrics | Marco Nicosia | Lohit Vijayarenu
HADOOP-3297 | The way in which ReduceTask/TaskTracker gets completion events during shuffle can be improved | Major | . | Devaraj Das | Devaraj Das
HADOOP-3364 | Faster image and log edits loading. | Major | . | Konstantin Shvachko | Konstantin Shvachko
HADOOP-3369 | Fast block processing during name-node startup. | Major | . | Konstantin Shvachko | Konstantin Shvachko
HADOOP-2154 | Non-interleaved checksums would optimize block transfers. | Major | . | Konstantin Shvachko | Raghu Angadi
HADOOP-3332 | improving the logging during shuffling | Blocker | . | Runping Qi | Devaraj Das
HADOOP-3355 | Configuration should accept decimal and hexadecimal values | Major | conf | Amareshwari Sriramadasu | Amareshwari Sriramadasu
HADOOP-3350 | distcp should permit users to limit the number of maps | Major | . | Chris Douglas | Chris Douglas
HADOOP-3013 | fsck to show (checksum) corrupted files | Major | . | Koji Noguchi | Lohit Vijayarenu
HADOOP-3377 | Use StringUtils#replaceAll instead of | Trivial | . | Brice Arnould | Brice Arnould
HADOOP-2661 | Replicator log should include block id | Minor | . | Raghu Angadi | Raghu Angadi
HADOOP-3398 | ReduceTask::closestPowerOf2 is inefficient | Trivial | . | Chris Douglas | Chris Douglas
HADOOP-2867 | Add a task’s cwd to it’s LD_LIBRARY_PATH | Major | . | Arun C Murthy | Amareshwari Sriramadasu
HADOOP-3400 | Facilitate creation of temporary files in HDFS | Major | . | dhruba borthakur | dhruba borthakur
HADOOP-4 | tool to mount dfs on linux | Major | . | John Xing | Pete Wyckoff
HADOOP-3434 | Retain cause of bind failure in Server.bind | Major | . | Steve Loughran | Steve Loughran
HADOOP-3429 | Increase the buffersize for the streaming parent java process’s streams | Major | . | Devaraj Das | Amareshwari Sriramadasu
HADOOP-3448 | Add some more hints of the problem when datanode and namenode don’t match | Minor | . | Steve Loughran | Steve Loughran
HADOOP-3177 | Expose DFSOutputStream.fsync API though the FileSystem interface | Major | . | dhruba borthakur | Tsz Wo Nicholas Sze
HADOOP-3464 | [HOD] HOD can improve error messages by reporting failures on compute nodes back to hod client | Major | contrib/hod | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli
HADOOP-3455 | IPC.Client synchronisation looks weak | Major | ipc | Steve Loughran | Hairong Kuang
HADOOP-3501 | deprecate InMemoryFileSystem | Major | fs | Doug Cutting | Doug Cutting
HADOOP-3366 | Shuffle/Merge improvements | Major | . | Arun C Murthy | Arun C Murthy
HADOOP-3492 | add forrest documentation for user archives | Blocker | . | Mahadev konar | Mahadev konar
HADOOP-3467 | The javadoc for FileSystem.deleteOnExit should have more description | Blocker | documentation | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3096 | Improve documentation about the Task Execution Environment in the Map-Reduce tutorial | Blocker | documentation | Arun C Murthy | Amareshwari Sriramadasu
HADOOP-3406 | Document controls for profiling maps & reduces | Blocker | documentation | Arun C Murthy | Amareshwari Sriramadasu
HADOOP-3277 | hod should better errors message when deallocate is fired on non allocated directory. | Minor | contrib/hod | Karam Singh |
HADOOP-2762 | Better documentation of controls for memory limits on hadoop daemons and Map-Reduce tasks | Blocker | documentation, scripts | Arun C Murthy | Amareshwari Sriramadasu
HADOOP-3535 | IOUtils.close needs better documentation | Blocker | io | Owen O’Malley | Owen O’Malley
HADOOP-3599 | The new setCombineOnceOnly shouldn’t take a JobConf, since it is a method on JobConf | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-3547 | Improve documentation about distributing native libraries via DistributedCache | Blocker | documentation | Arun C Murthy | Amareshwari Sriramadasu
HADOOP-3532 | Create build targets to create api change reports using jdiff | Major | build | Owen O’Malley | Owen O’Malley
HADOOP-3572 | setQuotas usage interface has some minor bugs. | Minor | . | Mahadev konar | Hairong Kuang
HADOOP-2987 | Keep two generations of fsimage | Major | . | Robert Chansler | Konstantin Shvachko

### BUG FIXES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-2905 | fsck -move triggers NPE in namenode | Major | . | Michael Bieniosek | Lohit Vijayarenu
HADOOP-2928 | Remove deprecated methods getContentLength() in ClientProtocol, NameNode, FileSystem, DistributedFileSystem and DFSClient | Blocker | . | Tsz Wo Nicholas Sze | Lohit Vijayarenu
HADOOP-3176 | Change lease record when a open-for-write-file gets renamed | Major | . | dhruba borthakur | dhruba borthakur
HADOOP-3130 | Shuffling takes too long to get the last map output. | Major | . | Runping Qi | Amar Kamat
HADOOP-3160 | remove exists() from ClientProtocol and NameNode | Major | . | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3269 | NameNode doesn’t startup when restarted after running an MR job | Blocker | . | Devaraj Das | Tsz Wo Nicholas Sze
HADOOP-3282 | TestCheckpoint occasionally fails because of the port issues. | Major | test | Konstantin Shvachko | Konstantin Shvachko
HADOOP-3272 | Reduce redundant copy of Block object in BlocksMap.map hash map | Major | . | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3268 | TestUrlStreamHandler.testFileUrls fails on Windows | Major | test | Nigel Daley | Christophe Taton
HADOOP-3127 | rm /user/<username>/.Trash/____ only moves it back to .Trash | Minor | fs | Koji Noguchi | Brice Arnould
HADOOP-3300 | FindBugs warnings in NetworkTopology | Major | . | Tom White | Tom White
HADOOP-2793 | Links for worst performing shuffle tasks are broken in Analyze Job. | Minor | . | Amar Kamat | Amareshwari Sriramadasu
HADOOP-3313 | RPC::Invoker makes unnecessary calls to System.currentTimeMillis | Minor | . | Chris Douglas | Chris Douglas
HADOOP-3318 | Hadoop streaming doesn’t recognize “Darwin” as an OS but Soylatte (OpenJDK port to Mac) reports that rather than “Mac OS X” | Major | . | Sam Pullara | Sam Pullara
HADOOP-3301 | Misleading error message when S3 URI contains hostname containing an underscore | Major | fs/s3 | Tom White | Tom White
HADOOP-3109 | RPC should accepted connections even when rpc queue is full (ie undo part of HADOOP-2910) | Blocker | . | Sanjay Radia | Hairong Kuang
HADOOP-3338 | trunk doesn’t compile after HADOOP-544 was committed | Blocker | . | Nigel Daley | Christophe Taton
HADOOP-3337 | Name-node fails to start because DatanodeInfo format changed. | Blocker | . | Konstantin Shvachko | Tsz Wo Nicholas Sze
HADOOP-3101 | ‘bin/hadoop job’ should display the help and silently exit | Minor | . | Amar Kamat | Edward J. Yoon
HADOOP-3119 | Text.getBytes() | Trivial | . | Andrew Gudkov | Tim Nelson
HADOOP-2294 | In hdfs.h , the comment says you release the result of a hdfsListDirectory with a freehdfsFileInfo, but should say hdfsFreeFileInfo | Trivial | . | Dick King | Craig Macdonald
HADOOP-3335 | ‘make clean’ in src/c++/libhdfs does ‘rm -rf /*’ | Critical | build | Doug Cutting | Doug Cutting
HADOOP-2930 | make {start,stop}-balancer.sh work even if hadoop-daemon.sh isn’t in the PATH | Trivial | scripts | Spiros Papadimitriou | Spiros Papadimitriou
HADOOP-3085 | pushMetric() method of various metric util classes should catch exceptions | Major | metrics | Runping Qi | Chris Douglas
HADOOP-3248 | Improve Namenode startup performance | Major | . | girish vaitheeswaran | dhruba borthakur
HADOOP-3299 | org.apache.hadoop.mapred.join.CompositeInputFormat does not initialize TextInput format files with the configuration resulting in an NullPointerException | Major | io | Jason | Chris Douglas
HADOOP-3309 | Unit test fails on Windows: org.apache.hadoop.mapred.TestMiniMRDFSSort.unknown | Major | . | Mukund Madhugiri | Lohit Vijayarenu
HADOOP-3348 | TestUrlStreamHandler hangs on LINUX | Major | fs | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3371 | MBeanUtil dumps stacktrace from registerMBean | Minor | metrics | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3349 | FSNamesystem.changeLease(src, dst) incorrectly updates the paths inside a lease | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3365 | SequenceFile.Sorter.MergeQueue.next does an unnecessary copy of the key | Major | io | Arun C Murthy | Devaraj Das
HADOOP-3203 | TaskTracker::localizeJob doesn’t provide the correct size to LocalDirAllocator | Major | . | Chris Douglas | Amareshwari Sriramadasu
HADOOP-3388 | TestDatanodeBlockScanner failed while trying to corrupt replicas | Major | test | dhruba borthakur | dhruba borthakur
HADOOP-3393 | TestHDFSServerPorts fails on LINUX (NFS mounted directory) and on WINDOWS | Major | . | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3391 | HADOOP-3248 introduced a findbugs warning. | Minor | . | Raghu Angadi | Raghu Angadi
HADOOP-3399 | Debug log not removed in ipc client | Trivial | ipc | Raghu Angadi | Raghu Angadi
HADOOP-3339 | DFS Write pipeline does not detect defective datanode correctly if it times out. | Major | . | Raghu Angadi | Raghu Angadi
HADOOP-3396 | Unit test TestDatanodeBlockScanner fails on Windows | Critical | . | Mukund Madhugiri | Lohit Vijayarenu
HADOOP-3409 | NameNode should save the root inode into fsimage | Major | . | Hairong Kuang | Hairong Kuang
HADOOP-3296 | Some levels are skipped while creating the task cache in JobInProgress | Major | . | Amar Kamat | Amar Kamat
HADOOP-3375 | Lease paths are sometimes not removed from LeaseManager.sortedLeasesByPath | Blocker | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3424 | the value returned from getPartition should be checked to make sure it is in the range 0..#reduces-1 | Major | . | Owen O’Malley | Chris Douglas
HADOOP-3408 | Change FSNamesytem status metrics to IntValue | Major | metrics | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3381 | INode interlinks can multiply effect of memory leaks | Major | . | Raghu Angadi | Raghu Angadi
HADOOP-3403 | Job tracker’s ExpireTackers thread gets NullPointerException if a tasktracker is lost. | Blocker | . | Amareshwari Sriramadasu | Arun C Murthy
HADOOP-1318 | Do not fail completed maps on lost tasktrackers if ‘-reducer NONE’ is specified | Minor | . | Arun C Murthy | Amareshwari Sriramadasu
HADOOP-3351 | Fix history viewer | Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu
HADOOP-3419 | TestFsck fails once in a while on WINDOWS/LINUX | Major | . | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3259 | Configuration.substituteVars() needs to handle security exceptions | Trivial | conf | Steve Loughran | Edward J. Yoon
HADOOP-3232 | Datanodes time out | Critical | . | Johan Oskarsson | Johan Oskarsson
HADOOP-3451 | test-libhdfs fails on Linux | Blocker | test | Mukund Madhugiri | Lohit Vijayarenu
HADOOP-3401 | Update FileBench to use the “work” directory for SequenceFileOutputFormat | Major | test | Chris Douglas | Chris Douglas
HADOOP-3468 | Compile error: FTPFileSystem.java:26: cannot access org.apache.commons.net.ftp.FTP | Blocker | fs | Tsz Wo Nicholas Sze | Ankur
HADOOP-2669 | DFS client lost lease during writing into DFS files | Major | . | Runping Qi | dhruba borthakur
HADOOP-3410 | KFS implementation needs to return file modification time | Minor | . | Sriram Rao | Sriram Rao
HADOOP-3340 | hadoop dfs metrics shows 0 | Major | metrics | Eric Yang | Lohit Vijayarenu
HADOOP-3435 | test-patch fail if sh != bash | Major | . | Brice Arnould | Brice Arnould
HADOOP-3471 | TestIndexedSort sometimes fails | Major | test | Chris Douglas | Chris Douglas
HADOOP-3443 | map outputs should not be renamed between partitions | Critical | . | Owen O’Malley | Owen O’Malley
HADOOP-3454 | Text.find incorrectly searches beyond the end of the buffer | Major | . | Chad Whipkey | Chad Whipkey
HADOOP-3376 | [HOD] HOD should have a way to detect and deal with clusters that violate/exceed resource manager limits | Major | contrib/hod | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli
HADOOP-2132 | Killing successfully completed jobs moves them to failed | Critical | . | Srikanth Kakani | Jothi Padmanabhan
HADOOP-2961 | [HOD] Hod expects port info though external host is not mentioned. | Minor | contrib/hod | Hemanth Yamijala | Vinod Kumar Vavilapalli
HADOOP-3151 | Hod should have better error messages. | Major | contrib/hod | Arkady Borkovsky | Vinod Kumar Vavilapalli
HADOOP-3476 | Code cleanup needed in fuse-dfs | Major | . | Tsz Wo Nicholas Sze | Pete Wyckoff
HADOOP-2095 | Reducer failed due to Out ofMemory | Major | . | Runping Qi | Arun C Murthy
HADOOP-2427 | Cleanup of mapred.local.dir after maptask is complete | Major | . | Lohit Vijayarenu | Amareshwari Sriramadasu
HADOOP-2565 | DFSPath cache of FileStatus can become stale | Major | . | Doug Cutting | Tsz Wo Nicholas Sze
HADOOP-3326 | ReduceTask should not sleep for 200 ms while waiting for merge to finish | Major | . | Owen O’Malley | Sharad Agarwal
HADOOP-3493 | TestStreamingFailure fails. | Major | . | Amareshwari Sriramadasu | Lohit Vijayarenu
HADOOP-236 | job tracker should refuse connection from a task tracker with a different version number | Major | . | Hairong Kuang | Sharad Agarwal
HADOOP-3453 | ipc.Client.close() throws NullPointerException | Major | ipc | Tsz Wo Nicholas Sze | Hairong Kuang
HADOOP-3427 | In ReduceTask::fetchOutputs, wait for result can be improved slightly | Major | . | Devaraj Das | Devaraj Das
HADOOP-3240 | TestJobShell should not create files in the current directory | Blocker | test | Tsz Wo Nicholas Sze | Mahadev konar
HADOOP-3496 | TestHarFileSystem.testArchives fails | Blocker | fs | Amareshwari Sriramadasu | Tom White
HADOOP-2393 | TaskTracker locks up removing job files within a synchronized method | Critical | . | Joydeep Sen Sarma | Amareshwari Sriramadasu
HADOOP-3135 | if the ‘mapred.system.dir’ in the client jobconf is different from the JobTracker’s value job submission fails | Critical | . | Alejandro Abdelnur | Subru Krishnan
HADOOP-3503 | Race condition when client and namenode start block recovery simultaneously | Major | . | dhruba borthakur | dhruba borthakur
HADOOP-3440 | TaskRunner creates a symlink with name ‘null’ if a file is added to DistributedCache without fragment | Minor | . | Abhijit Bagri | Devaraj Das
HADOOP-3413 | SequenceFile.Reader doesn’t use the Serialization framework | Critical | io | Arun C Murthy | Tom White
HADOOP-3463 | hadoop scripts don’t change directory to hadoop_home | Critical | scripts | Owen O’Malley | Owen O’Malley
HADOOP-3491 | Name-node shutdown causes InterruptedException in ResolutionMonitor | Major | . | Konstantin Shvachko | Lohit Vijayarenu
HADOOP-3509 | FSNamesystem.close() throws NullPointerException | Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3489 | NPE in SafeModeMonitor | Major | . | Konstantin Shvachko | Lohit Vijayarenu
HADOOP-3511 | Namenode should not restore the root’s quota if the quota was not in the image | Blocker | . | Hairong Kuang | Hairong Kuang
HADOOP-3516 | TestHarFileSystem.testArchives fails with NullPointerException | Blocker | test | Nigel Daley | Subru Krishnan
HADOOP-3513 | Improve NNThroughputBenchmark log messages. | Major | test | Konstantin Shvachko | Konstantin Shvachko
HADOOP-3519 | NPE in DFS FileSystem rename | Blocker | . | Tom White | Hairong Kuang
HADOOP-3528 | Metrics FilesCreated and files_deleted metrics do not match. | Blocker | metrics | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3418 | NameNode does not restart if parent directory of a “FileUnderConstruction” is deleted. | Blocker | . | Raghu Angadi | Tsz Wo Nicholas Sze
HADOOP-3542 | Hadoop archives should not create _logs file in the final archive directory. | Blocker | . | Mahadev konar | Mahadev konar
HADOOP-3544 | The command “archive” is missing in the example in docs/hadoop_archives.html (and pdf) | Blocker | documentation | Jothi Padmanabhan | Jothi Padmanabhan
HADOOP-3523 | [HOD] If a job does not exist in Torque’s list of jobs, HOD allocate on previously allocated directory fails. | Blocker | contrib/hod | Hemanth Yamijala | Hemanth Yamijala
HADOOP-3517 | The last InMemory merge may be missed | Blocker | . | Devaraj Das | Arun C Murthy
HADOOP-3548 | The tools.jar is not included in the distribution | Blocker | build | Owen O’Malley | Owen O’Malley
HADOOP-3363 | HDFS throws a InconsistentFSStateException when the name node starts up on a directory that isnt formatted | Blocker | . | Steve Loughran | Konstantin Shvachko
HADOOP-3560 | Archvies sometimes create empty part files. | Blocker | . | Mahadev konar | Mahadev konar
HADOOP-3545 | archive is failing with “Illegal Capacity” error | Blocker | . | Jothi Padmanabhan | Mahadev konar
HADOOP-3561 | With trash enabled, ‘hadoop fs -rmr .’ still fully deletes the working dir | Blocker | . | Chris Douglas | Chris Douglas
HADOOP-3531 | Hod does not report job tracker failure on hod client side when job tracker fails to come up | Blocker | contrib/hod | Karam Singh | Hemanth Yamijala
HADOOP-3575 | clover target broken after src restructuring | Minor | build | Nigel Daley | Nigel Daley
HADOOP-3539 | Cygwin: cygpath displays an error message in running bin/hadoop script | Blocker | scripts | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3564 | Sometime after successful hod allocation datanode fails to come up with java.net.BindException for dfs.datanode.ipc.address | Blocker | contrib/hod | Karam Singh | Vinod Kumar Vavilapalli
HADOOP-3520 | Generation stamp upgrade fails TestDFSUpgradeFromImage | Blocker | . | Konstantin Shvachko | dhruba borthakur
HADOOP-3586 | keep combiner backward compatible with earlier versions of hadoop | Blocker | . | Olga Natkovich | Chris Douglas
HADOOP-3533 | The api to JobTracker and TaskTracker have changed incompatibly | Blocker | . | Owen O’Malley | Owen O’Malley
HADOOP-3593 | Update MapRed tutorial | Blocker | documentation | Devaraj Das | Devaraj Das
HADOOP-3580 | Using a har file as input for the Sort example fails | Blocker | . | Jothi Padmanabhan | Mahadev konar
HADOOP-3333 | job failing because of reassigning same tasktracker to failing tasks | Blocker | . | Christian Kunz | Jothi Padmanabhan
HADOOP-3534 | The namenode ignores ioexceptions in close | Blocker | . | Owen O’Malley | Tsz Wo Nicholas Sze
HADOOP-3546 | TaskTracker re-initialization gets stuck in cleaning up | Blocker | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu
HADOOP-3320 | NPE in NetworkTopology.getDistance() | Blocker | . | Konstantin Shvachko | Hairong Kuang
HADOOP-3576 | hadoop dfs -mv throws NullPointerException | Blocker | . | Lohit Vijayarenu | Tsz Wo Nicholas Sze
HADOOP-3076 | [HOD] If a cluster directory is specified as a relative path, an existing script.exitcode file will not be deleted. | Blocker | contrib/hod | Hemanth Yamijala | Vinod Kumar Vavilapalli
HADOOP-3590 | Null pointer exception in JobTracker when the task tracker is not yet resolved | Blocker | . | Amar Kamat | Amar Kamat
HADOOP-3606 | Update streaming documentation | Blocker | documentation | Amareshwari Sriramadasu | Amareshwari Sriramadasu
HADOOP-3505 | omissions in HOD documentation | Blocker | contrib/hod, documentation | Ari Rabkin | Vinod Kumar Vavilapalli
HADOOP-3603 | Setting spill threshold to 100% fails to detect spill for records | Blocker | . | Chris Douglas | Chris Douglas
HADOOP-3615 | DatanodeProtocol.versionID should be 16L | Blocker | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3537 | Datanode not starting up with java.lang.StringIndexOutOfBoundsException in NetworkTopology.remove | Blocker | . | Koji Noguchi | Hairong Kuang
HADOOP-3487 | Balancer should not allocate a thread per block move | Blocker | . | Hairong Kuang | Hairong Kuang
HADOOP-3571 | ArrayIndexOutOfBoundsException in BlocksMap$BlockInfo.setPrevious | Blocker | . | Tsz Wo Nicholas Sze | Konstantin Shvachko
HADOOP-3559 | test-libhdfs fails on linux | Blocker | . | Mukund Madhugiri | Lohit Vijayarenu
HADOOP-3480 | Need to update Eclipse template to reflect current trunk | Blocker | build | Tsz Wo Nicholas Sze | Brice Arnould
HADOOP-3645 | MetricsTimeVaryingRate returns wrong value for metric_avg_time | Blocker | metrics | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3552 | forrest doc for hadoop commands | Blocker | documentation | Sharad Agarwal | Sharad Agarwal
HADOOP-3588 | Bug report for archives | Blocker | . | Hairong Kuang | Mahadev konar
HADOOP-3635 | Uncaught exception in DataBlockScanner | Blocker | . | Koji Noguchi | Tsz Wo Nicholas Sze
HADOOP-3639 | Exception when closing DFSClient while multiple files are open | Blocker | . | Benjamin Gufler | Benjamin Gufler
HADOOP-3649 | ArrayIndexOutOfBounds in FSNamesystem.getBlockLocationsInternal | Blocker | . | Arun C Murthy | Lohit Vijayarenu
HADOOP-3604 | Reduce stuck at shuffling phase | Blocker | . | Runping Qi | Arun C Murthy
HADOOP-3668 | Clean up HOD documentation | Blocker | contrib/hod | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli
HADOOP-3597 | SortValidator always uses the default file system irrespective of the actual input | Major | test | Jothi Padmanabhan | Jothi Padmanabhan
HADOOP-3688 | Fix up HDFS docs | Blocker | . | Robert Chansler | Robert Chansler
HADOOP-3693 | Fix documentation for Archives, distcp and native libraries | Blocker | documentation | Amareshwari Sriramadasu | Amareshwari Sriramadasu
HADOOP-3653 | test-patch target not working on hudson.zones.apache.org due to HADOOP-3480 | Blocker | . | Nigel Daley | Brice Arnould
HADOOP-3692 | Fix documentation for Cluster setup and Quick start guides | Blocker | documentation | Amareshwari Sriramadasu | Amareshwari Sriramadasu
HADOOP-3691 | Fix mapred docs | Blocker | documentation | Amareshwari Sriramadasu | Jothi Padmanabhan
HADOOP-3673 | Deadlock in Datanode RPC servers | Blocker | . | dhruba borthakur | Tsz Wo Nicholas Sze
HADOOP-3630 | CompositeRecordReader: key and values can be in uninitialized state if files being joined have no records | Major | . | Jingkei Ly | Chris Douglas
HADOOP-3706 | CompositeInputFormat: Unable to wrap custom InputFormats | Major | . | Jingkei Ly | Jingkei Ly
HADOOP-3718 | KFS: write(int v) API writes out an integer rather than a byte | Minor | . | Sriram Rao | Sriram Rao
HADOOP-3647 | Corner-case in IFile leads to failed tasks | Blocker | . | Arun C Murthy | Arun C Murthy
HADOOP-3716 | KFS listStatus() returns NULL on empty directories | Minor | . | Sriram Rao | Sriram Rao
HADOOP-3752 | Audit logging fails to record rename | Blocker | . | Chris Douglas | Chris Douglas
HADOOP-3737 | CompressedWritable throws OutOfMemoryError | Major | io | Grant Glouser | Grant Glouser
HADOOP-3670 | JobTracker running out of heap space | Blocker | . | Christian Kunz | Amareshwari Sriramadasu
HADOOP-3755 | the gridmix scripts do not work with hod 0.4 | Major | . | Runping Qi | Runping Qi
HADOOP-3677 | Problems with generation stamp upgrade | Blocker | . | Konstantin Shvachko | Raghu Angadi
HADOOP-3743 | -libjars, -files and -archives options do not work with 0.18 | Blocker | . | Mahadev konar | Amareshwari Sriramadasu
HADOOP-3774 | Typos in shell output | Blocker | fs | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3798 | compile-core-test fails to compile | Blocker | build | Mukund Madhugiri | Mukund Madhugiri
HADOOP-3762 | Task tracker died due to OOM | Blocker | . | Runping Qi | Doug Cutting
HADOOP-3794 | KFS implementation needs to return directory modification time | Minor | . | Sriram Rao | Sriram Rao
HADOOP-3806 | Remove debug message from Quicksort | Trivial | . | Chris Douglas |
HADOOP-3776 | NPE in NameNode with unknown blocks | Blocker | . | Raghu Angadi | Raghu Angadi
HADOOP-3521 | Hadoop mapreduce task metrics, unable to send metrics data. | Blocker | . | Eric Yang | Arun C Murthy
HADOOP-3724 | Namenode does not start due to exception throw while saving Image | Blocker | . | Lohit Vijayarenu | dhruba borthakur
HADOOP-3827 | Jobs with empty map-outputs and intermediate compression fail | Blocker | . | Arun C Murthy | Arun C Murthy
HADOOP-3855 | Fix import of MiniDFSCluster in TestCompressedEmptyMapOutputs.java | Blocker | test | Arun C Murthy | Arun C Murthy
HADOOP-3865 | SecondaryNameNode runs out of memory | Blocker | . | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3884 | eclipse plugin build is broken with current eclipse versions | Blocker | contrib/eclipse-plugin | Doug Cutting | Doug Cutting
HADOOP-3897 | SecondaryNameNode fails with NullPointerException | Major | . | Lohit Vijayarenu | Lohit Vijayarenu
HADOOP-3901 | CLASSPATH in bin/hadoop script is set incorrectly for cygwin | Blocker | scripts | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze
HADOOP-3947 | TaskTrackers fail to connect back upon a re-init action | Blocker | . | Amar Kamat | Amareshwari Sriramadasu

### TESTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-3100 | Develop tests to test the DFS command line interface | Major | test | Mukund Madhugiri | Mukund Madhugiri

### OTHER:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-2984 | Distcp should have forrest documentation | Blocker | util | Owen O’Malley | Chris Douglas
HADOOP-3541 | Namespace recovery from the secondary image should be documented. | Blocker | documentation | Konstantin Shvachko | Konstantin Shvachko
HADOOP-2632 | Discussion of fsck operation in the permissions regime | Major | . | Robert Chansler | Robert Chansler