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-
-<!---
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
--->
-# Apache Hadoop Changelog
-
-## Release 0.20.0 - 2009-04-22
-
-### INCOMPATIBLE CHANGES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-4210](https://issues.apache.org/jira/browse/HADOOP-4210) | Findbugs 
warnings are printed related to equals implementation of several classes |  
Major | . | Suresh Srinivas | Suresh Srinivas |
-| [HADOOP-4253](https://issues.apache.org/jira/browse/HADOOP-4253) | Fix 
warnings generated by FindBugs |  Major | conf, fs, record | Suresh Srinivas | 
Suresh Srinivas |
-| [HADOOP-4572](https://issues.apache.org/jira/browse/HADOOP-4572) | INode and 
its sub-classes should be package private |  Major | . | Tsz Wo Nicholas Sze | 
Tsz Wo Nicholas Sze |
-| [HADOOP-4618](https://issues.apache.org/jira/browse/HADOOP-4618) | Move http 
server from FSNamesystem into NameNode. |  Major | . | Konstantin Shvachko | 
Konstantin Shvachko |
-| [HADOOP-4567](https://issues.apache.org/jira/browse/HADOOP-4567) | 
GetFileBlockLocations should return the NetworkTopology information of the 
machines that hosts those blocks |  Major | . | dhruba borthakur | dhruba 
borthakur |
-| [HADOOP-4435](https://issues.apache.org/jira/browse/HADOOP-4435) | The 
JobTracker should display the amount of heap memory used |  Minor | . | dhruba 
borthakur | dhruba borthakur |
-| [HADOOP-3923](https://issues.apache.org/jira/browse/HADOOP-3923) | Deprecate 
org.apache.hadoop.mapred.StatusHttpServer |  Minor | . | Tsz Wo Nicholas Sze | 
Tsz Wo Nicholas Sze |
-| [HADOOP-4188](https://issues.apache.org/jira/browse/HADOOP-4188) | Remove 
Task's dependency on concrete file systems |  Major | . | Tom White | Sharad 
Agarwal |
-| [HADOOP-1650](https://issues.apache.org/jira/browse/HADOOP-1650) | Upgrade 
Jetty to 6.x |  Major | . | Devaraj Das | Chris Douglas |
-| [HADOOP-3986](https://issues.apache.org/jira/browse/HADOOP-3986) | JobClient 
should not have a static configuration |  Major | . | Amareshwari Sriramadasu | 
Amareshwari Sriramadasu |
-| [HADOOP-4422](https://issues.apache.org/jira/browse/HADOOP-4422) | S3 file 
systems should not create bucket |  Major | fs/s3 | David Phillips | David 
Phillips |
-| [HADOOP-3422](https://issues.apache.org/jira/browse/HADOOP-3422) | Ganglia 
counter metrics are all reported with the metric name "value", so the counter 
values can not be seen |  Major | metrics | Jason | stack |
-| [HADOOP-4035](https://issues.apache.org/jira/browse/HADOOP-4035) | Modify 
the capacity scheduler (HADOOP-3445) to schedule tasks based on memory 
requirements and task trackers free memory |  Blocker | . | Hemanth Yamijala | 
Vinod Kumar Vavilapalli |
-| [HADOOP-3750](https://issues.apache.org/jira/browse/HADOOP-3750) | Fix and 
enforce module dependencies |  Major | . | Tom White | Sharad Agarwal |
-| [HADOOP-3497](https://issues.apache.org/jira/browse/HADOOP-3497) | File 
globbing with a PathFilter is too restrictive |  Major | fs | Tom White | Tom 
White |
-| [HADOOP-4576](https://issues.apache.org/jira/browse/HADOOP-4576) | Modify 
pending tasks count in the UI to pending jobs count in the UI |  Major | . | 
Hemanth Yamijala | Sreekanth Ramakrishnan |
-| [HADOOP-4445](https://issues.apache.org/jira/browse/HADOOP-4445) | Wrong 
number of running map/reduce tasks are displayed in queue information. |  Major 
| . | Karam Singh | Sreekanth Ramakrishnan |
-| [HADOOP-4029](https://issues.apache.org/jira/browse/HADOOP-4029) | NameNode 
should report status and performance for each replica of image and log |  Major 
| . | Robert Chansler | Boris Shkolnik |
-| [HADOOP-4826](https://issues.apache.org/jira/browse/HADOOP-4826) | Admin 
command saveNamespace. |  Major | . | Konstantin Shvachko | Konstantin Shvachko 
|
-| [HADOOP-4631](https://issues.apache.org/jira/browse/HADOOP-4631) | Split the 
default configurations into 3 parts |  Major | conf | Owen O'Malley | Sharad 
Agarwal |
-| [HADOOP-3344](https://issues.apache.org/jira/browse/HADOOP-3344) | libhdfs: 
always builds 32bit, even when x86\_64 Java used |  Major | build | Craig 
Macdonald | Giridharan Kesavan |
-| [HADOOP-4789](https://issues.apache.org/jira/browse/HADOOP-4789) | Change 
fair scheduler to share between pools by default, not between invidual jobs |  
Minor | . | Matei Zaharia | Matei Zaharia |
-| [HADOOP-4970](https://issues.apache.org/jira/browse/HADOOP-4970) | Use the 
full path when move files to .Trash/Current |  Major | . | Prasad Chakka | 
Prasad Chakka |
-| [HADOOP-4103](https://issues.apache.org/jira/browse/HADOOP-4103) | Alert for 
missing blocks |  Major | . | Christian Kunz | Raghu Angadi |
-| [HADOOP-4783](https://issues.apache.org/jira/browse/HADOOP-4783) | History 
files are given world readable permissions. |  Blocker | . | Hemanth Yamijala | 
Amareshwari Sriramadasu |
-| [HADOOP-5531](https://issues.apache.org/jira/browse/HADOOP-5531) | Remove 
Chukwa on branch-0.20 |  Blocker | . | Nigel Daley | Nigel Daley |
-
-
-### NEW FEATURES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-4284](https://issues.apache.org/jira/browse/HADOOP-4284) | Support 
for user configurable global filters on HttpServer |  Major | security | Kan 
Zhang | Kan Zhang |
-| [HADOOP-4575](https://issues.apache.org/jira/browse/HADOOP-4575) | An 
independent HTTPS proxy for HDFS |  Major | security | Kan Zhang | Kan Zhang |
-| [HADOOP-4622](https://issues.apache.org/jira/browse/HADOOP-4622) | 
Explicitly specify interpretor for non-native binaries |  Minor | . | Fredrik 
Hedberg | Fredrik Hedberg |
-| [HADOOP-4661](https://issues.apache.org/jira/browse/HADOOP-4661) | distch: a 
tool for distributed ch{mod,own} |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo 
Nicholas Sze |
-| [HADOOP-4179](https://issues.apache.org/jira/browse/HADOOP-4179) | 
Hadoop-Vaidya : Rule based performance diagnostic tool for Map/Reduce jobs |  
Major | . | Suhas Gogate | Suhas Gogate |
-| [HADOOP-4348](https://issues.apache.org/jira/browse/HADOOP-4348) | Adding 
service-level authorization to Hadoop |  Major | security | Kan Zhang | Arun C 
Murthy |
-| [HADOOP-4937](https://issues.apache.org/jira/browse/HADOOP-4937) | [HOD] 
Include ringmaster RPC port information in the notes attribute |  Major | 
contrib/hod | Hemanth Yamijala | Peeyush Bishnoi |
-| [HADOOP-4804](https://issues.apache.org/jira/browse/HADOOP-4804) | Create 
Forrest documentation for the fair scheduler |  Minor | . | Matei Zaharia | 
Sreekanth Ramakrishnan |
-
-
-### IMPROVEMENTS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-4234](https://issues.apache.org/jira/browse/HADOOP-4234) | KFS: 
Allow KFS layer to interface with multiple KFS namenodes |  Minor | fs | Sriram 
Rao | Sriram Rao |
-| [HADOOP-4244](https://issues.apache.org/jira/browse/HADOOP-4244) | In "ant 
test-patch", runContribTestOnEclipseFiles should not be run on Hudson only |  
Major | build, test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-3180](https://issues.apache.org/jira/browse/HADOOP-3180) | add name 
of faulty class to WritableName.getClass IOException upon 
ClassNotFoundException |  Trivial | io | Pete Wyckoff | Pete Wyckoff |
-| [HADOOP-4178](https://issues.apache.org/jira/browse/HADOOP-4178) | The 
capacity scheduler's defaults for queues should be configurable. |  Blocker | . 
| Owen O'Malley | Sreekanth Ramakrishnan |
-| [HADOOP-4226](https://issues.apache.org/jira/browse/HADOOP-4226) | 
LineReader::readLine cleanup |  Minor | . | Yuri Pradkin | Yuri Pradkin |
-| [HADOOP-4440](https://issues.apache.org/jira/browse/HADOOP-4440) | 
TestJobInProgressListener should also test for jobs killed in queued state |  
Minor | test | Amar Kamat | Amar Kamat |
-| [HADOOP-4276](https://issues.apache.org/jira/browse/HADOOP-4276) | The 
mapred.\*ID classes are inefficient for hashCode and serialization |  Major | . 
| Owen O'Malley | Owen O'Malley |
-| [HADOOP-4485](https://issues.apache.org/jira/browse/HADOOP-4485) | ant 
compile-native shorthand |  Trivial | build | Enis Soztutar | Enis Soztutar |
-| [HADOOP-4454](https://issues.apache.org/jira/browse/HADOOP-4454) | Support 
comments in 'slaves'  file |  Minor | conf, scripts | Rama, Ramasamy | Rama, 
Ramasamy |
-| [HADOOP-3461](https://issues.apache.org/jira/browse/HADOOP-3461) | Remove 
dfs.StringBytesWritbale |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas 
Sze |
-| [HADOOP-4437](https://issues.apache.org/jira/browse/HADOOP-4437) | Use qMC 
sequence to improve the accuracy of PiEstimator |  Minor | . | Tsz Wo Nicholas 
Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-4599](https://issues.apache.org/jira/browse/HADOOP-4599) | BlocksMap 
and BlockInfo should be package private. |  Major | . | Konstantin Shvachko | 
Konstantin Shvachko |
-| [HADOOP-4453](https://issues.apache.org/jira/browse/HADOOP-4453) | Improve 
ssl handling for distcp |  Major | . | Chris Douglas | Kan Zhang |
-| [HADOOP-4126](https://issues.apache.org/jira/browse/HADOOP-4126) | Allow 
access to HDFS web UI on EC2 |  Major | contrib/cloud | Tom White | Tom White |
-| [HADOOP-4523](https://issues.apache.org/jira/browse/HADOOP-4523) | Enhance 
how memory-intensive user tasks are handled |  Major | . | Vivek Ratan | Vinod 
Kumar Vavilapalli |
-| [HADOOP-4668](https://issues.apache.org/jira/browse/HADOOP-4668) | Improve 
JavaDoc on JobConf.setCombinerClass to better document restrictions on 
combiners |  Major | documentation | Owen O'Malley | Owen O'Malley |
-| [HADOOP-4640](https://issues.apache.org/jira/browse/HADOOP-4640) | Add 
ability to split text files compressed with lzo |  Trivial | io | Johan 
Oskarsson | Johan Oskarsson |
-| [HADOOP-4666](https://issues.apache.org/jira/browse/HADOOP-4666) | Launch 
reduces only after a few maps have run in the Fair Scheduler |  Major | . | 
Matei Zaharia | Matei Zaharia |
-| [HADOOP-4339](https://issues.apache.org/jira/browse/HADOOP-4339) | Improve 
FsShell -du/-dus and FileSystem.getContentSummary efficiency |  Major | fs | 
David Phillips | David Phillips |
-| [HADOOP-2774](https://issues.apache.org/jira/browse/HADOOP-2774) | Add 
counters to show number of key/values that have been sorted and merged in the 
maps and reduces |  Major | . | Owen O'Malley | Ravi Gummadi |
-| [HADOOP-4705](https://issues.apache.org/jira/browse/HADOOP-4705) | [HOD] 
Grant read permissions for files/directories created by hod as part of 
provisioning hadoop clusters |  Major | contrib/hod | Hemanth Yamijala | 
Peeyush Bishnoi |
-| [HADOOP-4649](https://issues.apache.org/jira/browse/HADOOP-4649) | Improve 
abstraction for spill indices |  Minor | . | Chris Douglas | Chris Douglas |
-| [HADOOP-3770](https://issues.apache.org/jira/browse/HADOOP-3770) | improve 
composition, submission and result collection of gridmix |  Major | benchmarks 
| Lingyun Yang | Runping Qi |
-| [HADOOP-4708](https://issues.apache.org/jira/browse/HADOOP-4708) | Add 
support for dfsadmin commands for test TestCLI unit test |  Major | test | 
Boris Shkolnik | Boris Shkolnik |
-| [HADOOP-4758](https://issues.apache.org/jira/browse/HADOOP-4758) | Add a 
splitter for metrics contexts |  Minor | metrics | Chris Douglas | Chris 
Douglas |
-| [HADOOP-4690](https://issues.apache.org/jira/browse/HADOOP-4690) | fuse-dfs 
- create source file/function + utils + config + main source files |  Minor | . 
| Pete Wyckoff | Pete Wyckoff |
-| [HADOOP-4747](https://issues.apache.org/jira/browse/HADOOP-4747) | Reuse 
FileStatus in FsShell where possible |  Minor | fs | David Phillips | David 
Phillips |
-| [HADOOP-4305](https://issues.apache.org/jira/browse/HADOOP-4305) | 
repeatedly blacklisted tasktrackers should get declared dead |  Major | . | 
Christian Kunz | Amareshwari Sriramadasu |
-| [HADOOP-4628](https://issues.apache.org/jira/browse/HADOOP-4628) | Move Hive 
out of Core |  Major | . | Owen O'Malley |  |
-| [HADOOP-4749](https://issues.apache.org/jira/browse/HADOOP-4749) | reducer 
should output input data size when shuffling is done |  Major | . | Zheng Shao 
| He Yongqiang |
-| [HADOOP-4837](https://issues.apache.org/jira/browse/HADOOP-4837) | Move 
HADOOP\_CONF\_DIR to chukwa-env.sh |  Major | . | Jerome Boulon | Jerome Boulon 
|
-| [HADOOP-4699](https://issues.apache.org/jira/browse/HADOOP-4699) | Change 
TaskTracker.MapOutputServlet to send only the IFile segment, validate checksum 
in Reduce |  Major | . | Chris Douglas | Chris Douglas |
-| [HADOOP-3063](https://issues.apache.org/jira/browse/HADOOP-3063) | 
BloomMapFile - fail-fast version of MapFile for sparsely populated key space |  
Major | io | Andrzej Bialecki | Andrzej Bialecki |
-| [HADOOP-1230](https://issues.apache.org/jira/browse/HADOOP-1230) | Replace 
parameters with context objects in Mapper, Reducer, Partitioner, InputFormat, 
and OutputFormat classes |  Major | . | Owen O'Malley | Owen O'Malley |
-| [HADOOP-4838](https://issues.apache.org/jira/browse/HADOOP-4838) | Cleanup 
Metrics and the MBeans |  Major | . | Sanjay Radia | Sanjay Radia |
-| [HADOOP-3136](https://issues.apache.org/jira/browse/HADOOP-3136) | Assign 
multiple tasks per TaskTracker heartbeat |  Major | . | Devaraj Das | Arun C 
Murthy |
-| [HADOOP-4545](https://issues.apache.org/jira/browse/HADOOP-4545) | Add an 
example of a secondary sort |  Major | . | Owen O'Malley | Owen O'Malley |
-| [HADOOP-4753](https://issues.apache.org/jira/browse/HADOOP-4753) | gridmix2 
code can be condensed |  Minor | benchmarks | Chris Douglas | Chris Douglas |
-| [HADOOP-4827](https://issues.apache.org/jira/browse/HADOOP-4827) | Improve 
data aggregation in database |  Major | . | Eric Yang | Eric Yang |
-| [HADOOP-4880](https://issues.apache.org/jira/browse/HADOOP-4880) | 
Improvements to TestJobTrackerRestart |  Major | test | Arun C Murthy | Amar 
Kamat |
-| [HADOOP-4909](https://issues.apache.org/jira/browse/HADOOP-4909) | Clean up 
map/reduce api to take JobContext in the static methods |  Major | . | Owen 
O'Malley | Owen O'Malley |
-| [HADOOP-4920](https://issues.apache.org/jira/browse/HADOOP-4920) | do not 
keep forrest output in subversion |  Major | documentation | Doug Cutting | 
Doug Cutting |
-| [HADOOP-4980](https://issues.apache.org/jira/browse/HADOOP-4980) | Cleanup 
the Capacity Scheduler code |  Major | . | Vivek Ratan | Vivek Ratan |
-| [HADOOP-4916](https://issues.apache.org/jira/browse/HADOOP-4916) | adjust 
build.xml to reference external properties when building the "init.d" for the 
rpm |  Major | . | Eric Yang | Eric Yang |
-| [HADOOP-4950](https://issues.apache.org/jira/browse/HADOOP-4950) | 
CompressorStream and BlockCompressorStream should be public |  Major | io | 
Owen O'Malley | Owen O'Malley |
-| [HADOOP-4843](https://issues.apache.org/jira/browse/HADOOP-4843) | Collect 
Job History log file and Job Conf file into Chukwa |  Major | . | Eric Yang | 
Eric Yang |
-| [HADOOP-5030](https://issues.apache.org/jira/browse/HADOOP-5030) | Chukwa 
RPM build improvements |  Major | . | Eric Yang | Eric Yang |
-| [HADOOP-4828](https://issues.apache.org/jira/browse/HADOOP-4828) | Update 
documentation for default configuration |  Major | documentation | Sharad 
Agarwal | Sharad Agarwal |
-| [HADOOP-5122](https://issues.apache.org/jira/browse/HADOOP-5122) | libhdfs 
test conf uses deprecated fs.default.name value |  Trivial | test | Craig 
Macdonald | Craig Macdonald |
-| [HADOOP-4565](https://issues.apache.org/jira/browse/HADOOP-4565) | 
MultiFileInputSplit can use data locality information to create splits |  Major 
| . | dhruba borthakur | dhruba borthakur |
-| [HADOOP-5275](https://issues.apache.org/jira/browse/HADOOP-5275) | ivy 
directory should be there in hadoop tar ball |  Major | build | Suman Sehgal | 
Giridharan Kesavan |
-| [HADOOP-5379](https://issues.apache.org/jira/browse/HADOOP-5379) | Throw 
exception instead of writing to System.err when there is a CRC error on 
CBZip2InputStream |  Minor | io | Rodrigo Schmidt | Rodrigo Schmidt |
-| [HADOOP-5395](https://issues.apache.org/jira/browse/HADOOP-5395) | When 
queue ACLs are enabled, the error message shown when a job is submitted to a 
non-existent queue is misleading |  Major | . | Hemanth Yamijala | rahul k 
singh |
-| [HADOOP-4664](https://issues.apache.org/jira/browse/HADOOP-4664) | 
Parallelize job initialization |  Blocker | . | Matei Zaharia | Jothi 
Padmanabhan |
-| [HADOOP-5466](https://issues.apache.org/jira/browse/HADOOP-5466) | CSS Style 
Changes for Hadoop Doc Headers and Code |  Major | documentation | Corinne 
Chandel | Corinne Chandel |
-| [HADOOP-5514](https://issues.apache.org/jira/browse/HADOOP-5514) | Add 
waiting/failed tasks to JobTracker metrics |  Major | metrics | Chris Douglas | 
Chris Douglas |
-| [HADOOP-5521](https://issues.apache.org/jira/browse/HADOOP-5521) | Remove 
dependency of testcases on RESTART\_COUNT |  Major | test | Amar Kamat | Ravi 
Gummadi |
-| [HADOOP-5468](https://issues.apache.org/jira/browse/HADOOP-5468) | Change 
Hadoop doc menu to sub-menus |  Major | documentation | Corinne Chandel | 
Corinne Chandel |
-| [HADOOP-5520](https://issues.apache.org/jira/browse/HADOOP-5520) | Typo in 
diskQuota help  documentation |  Trivial | documentation | Ravi Phulari | Ravi 
Phulari |
-| [HADOOP-5519](https://issues.apache.org/jira/browse/HADOOP-5519) | Remove 
claims from mapred-default.xml that prime numbers of tasks are helpful. |  
Major | . | Owen O'Malley | Owen O'Malley |
-| [HADOOP-4944](https://issues.apache.org/jira/browse/HADOOP-4944) | Allow 
Xinclude in hadoop config file |  Minor | conf | Rama, Ramasamy | Rama, 
Ramasamy |
-| [HADOOP-6150](https://issues.apache.org/jira/browse/HADOOP-6150) | Need to 
be able to instantiate a comparator instance from a comparator string without 
creating a TFile.Reader object |  Minor | io | Hong Tang | Hong Tang |
-| [HADOOP-466](https://issues.apache.org/jira/browse/HADOOP-466) | Startup 
scripts will not start instances of Hadoop daemons w/different configs w/o 
setting separate PID directories |  Major | conf | Vetle Roeim |  |
-
-
-### BUG FIXES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-4245](https://issues.apache.org/jira/browse/HADOOP-4245) | KFS: 
Update the kfs jar file |  Major | fs | Sriram Rao | Sriram Rao |
-| [HADOOP-4262](https://issues.apache.org/jira/browse/HADOOP-4262) | message 
generated when the client exception has a null message is not useful |  Minor | 
ipc | Steve Loughran |  |
-| [HADOOP-4204](https://issues.apache.org/jira/browse/HADOOP-4204) | Fix 
warnings generated by FindBugs |  Blocker | . | Suresh Srinivas | Suresh 
Srinivas |
-| [HADOOP-4207](https://issues.apache.org/jira/browse/HADOOP-4207) | update 
derby.jar to eliminate the one time wait of 2-3 minutes while running junit 
tests |  Minor | . | Prasad Chakka | Prasad Chakka |
-| [HADOOP-4325](https://issues.apache.org/jira/browse/HADOOP-4325) | Hadoop 
SocketInputStream.read() should return -1 in case of EOF. |  Minor | io | Raghu 
Angadi | Raghu Angadi |
-| [HADOOP-4408](https://issues.apache.org/jira/browse/HADOOP-4408) | FsAction 
operations shouldn't create new Objects |  Minor | fs | Chris Douglas | Chris 
Douglas |
-| [HADOOP-4238](https://issues.apache.org/jira/browse/HADOOP-4238) | [mapred] 
Unavailable schedulingInfo in "hadoop list [all]" output should be marked "N/A" 
|  Major | . | Vinod Kumar Vavilapalli | Sreekanth Ramakrishnan |
-| [HADOOP-3842](https://issues.apache.org/jira/browse/HADOOP-3842) | There is 
a window where the JobTracker is in the RUNNING state (i.e ready to accept 
jobs) and never executes them. |  Major | . | Amar Kamat | Hemanth Yamijala |
-| [HADOOP-4346](https://issues.apache.org/jira/browse/HADOOP-4346) | Hadoop 
triggers a "soft" fd leak. |  Major | io | Raghu Angadi | Raghu Angadi |
-| [HADOOP-4388](https://issues.apache.org/jira/browse/HADOOP-4388) | Bug in 
Datanode transferBlocks code |  Major | . | Suresh Srinivas | Suresh Srinivas |
-| [HADOOP-4587](https://issues.apache.org/jira/browse/HADOOP-4587) | typo in 
javadoc for map.input.file |  Trivial | documentation | Koji Noguchi | Koji 
Noguchi |
-| [HADOOP-4530](https://issues.apache.org/jira/browse/HADOOP-4530) | In fsck, 
HttpServletResponse sendError fails with IllegalStateException |  Major | . | 
Koji Noguchi | Hairong Kuang |
-| [HADOOP-4377](https://issues.apache.org/jira/browse/HADOOP-4377) | Race 
condition creating S3 buffer directory for NativeS3FileSystem |  Major | fs/s3 
| David Phillips | David Phillips |
-| [HADOOP-4583](https://issues.apache.org/jira/browse/HADOOP-4583) | Code 
optimization/cleanup in HDFS |  Major | . | Suresh Srinivas | Suresh Srinivas |
-| [HADOOP-4621](https://issues.apache.org/jira/browse/HADOOP-4621) | javadoc: 
warning - Multiple sources of package comments found for some packages |  Major 
| documentation | Tsz Wo Nicholas Sze | Kan Zhang |
-| [HADOOP-4571](https://issues.apache.org/jira/browse/HADOOP-4571) | chukwa 
conf files are not cleaned up |  Minor | . | Tsz Wo Nicholas Sze | Eric Yang |
-| [HADOOP-4589](https://issues.apache.org/jira/browse/HADOOP-4589) | Fix the 
PiEstimator output messages and code comments |  Minor | documentation | Tsz Wo 
Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-4650](https://issues.apache.org/jira/browse/HADOOP-4650) | 
local.cache.size is set to 10 GB, while DEFAULT\_CACHE\_SIZE is set to 1 MB |  
Trivial | filecache | Jeff Hammerbacher | Jeff Hammerbacher |
-| [HADOOP-4608](https://issues.apache.org/jira/browse/HADOOP-4608) | Examples 
-Driver does not check first argument. |  Major | . | Edward J. Yoon | Edward 
J. Yoon |
-| [HADOOP-4645](https://issues.apache.org/jira/browse/HADOOP-4645) | hdfs 
proxy doesn't package itself right. |  Major | . | Owen O'Malley | Kan Zhang |
-| [HADOOP-4606](https://issues.apache.org/jira/browse/HADOOP-4606) | There is 
a cygpath error if log directory does not exist |  Minor | scripts | Tsz Wo 
Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-4141](https://issues.apache.org/jira/browse/HADOOP-4141) | 
ScriptBasedMapping has infinite loop with invalid jobconf parameter |  Minor | 
. | Aaron Kimball | Aaron Kimball |
-| [HADOOP-3293](https://issues.apache.org/jira/browse/HADOOP-3293) | When an 
input split spans cross block boundary, the split location should be the host 
having most of bytes on it. |  Major | . | Runping Qi | Jothi Padmanabhan |
-| [HADOOP-4691](https://issues.apache.org/jira/browse/HADOOP-4691) | In the 
javadoc of IndexedSortable.compare(...), the link is wrong. |  Minor | 
documentation, util | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-4598](https://issues.apache.org/jira/browse/HADOOP-4598) | '-setrep' 
command skips under-replicated blocks |  Minor | . | Koji Noguchi | Hairong 
Kuang |
-| [HADOOP-4429](https://issues.apache.org/jira/browse/HADOOP-4429) | 
Misconfigured UNIX Groups Break Hadoop |  Minor | . | Alex Loddengaard | Alex 
Loddengaard |
-| [HADOOP-4676](https://issues.apache.org/jira/browse/HADOOP-4676) | Go back 
to Job has a wrong URL on blacklisted trackers page |  Minor | . | Amareshwari 
Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-4704](https://issues.apache.org/jira/browse/HADOOP-4704) | javadoc: 
"the the" =\> "the" |  Trivial | documentation | Tsz Wo Nicholas Sze | Tsz Wo 
Nicholas Sze |
-| [HADOOP-4513](https://issues.apache.org/jira/browse/HADOOP-4513) | Capacity 
scheduler should initialize tasks asynchronously |  Major | . | Hemanth 
Yamijala | Sreekanth Ramakrishnan |
-| [HADOOP-4677](https://issues.apache.org/jira/browse/HADOOP-4677) | 
FileSystem.getFileBlockLocations() (aka default implementation for Local 
FileSystem) incorrect. |  Major | fs | Hong Tang | Hong Tang |
-| [HADOOP-4669](https://issues.apache.org/jira/browse/HADOOP-4669) | A 
file-open sometimes may not set the access time of a file |  Major | . | dhruba 
borthakur | dhruba borthakur |
-| [HADOOP-4732](https://issues.apache.org/jira/browse/HADOOP-4732) |  
connectionTimeout and readTimeout are passed in wrong order in ReduceTask.java 
|  Minor | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-2771](https://issues.apache.org/jira/browse/HADOOP-2771) | changing 
the number of reduces dramatically changes the time of the map time |  Major | 
. | Owen O'Malley |  |
-| [HADOOP-4558](https://issues.apache.org/jira/browse/HADOOP-4558) | Scheduler 
fails to reclaim capacity if Jobs are submitted to queue one after the other |  
Major | . | Karam Singh | Amar Kamat |
-| [HADOOP-4770](https://issues.apache.org/jira/browse/HADOOP-4770) | gridmix2 
run script doesn't work on trunk |  Trivial | benchmarks | Chris Douglas | 
Chris Douglas |
-| [HADOOP-4738](https://issues.apache.org/jira/browse/HADOOP-4738) | 
saveVersion.sh could write a package-info.java that cannot be compiled when 
used with git |  Trivial | build | Hemanth Yamijala | Chris Douglas |
-| [HADOOP-4623](https://issues.apache.org/jira/browse/HADOOP-4623) | Running 
tasks are not maintained by JobInProgress if speculation is off |  Major | . | 
Amar Kamat | Amar Kamat |
-| [HADOOP-4786](https://issues.apache.org/jira/browse/HADOOP-4786) | 
TestTrackerBlacklistAcrossJobs compilation is broken |  Blocker | . | Hemanth 
Yamijala | Hemanth Yamijala |
-| [HADOOP-4785](https://issues.apache.org/jira/browse/HADOOP-4785) | avoid two 
calls to System.currentTimeMillis() in heartbeat |  Blocker | . | Amareshwari 
Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-4792](https://issues.apache.org/jira/browse/HADOOP-4792) | Chukwa 
build process generates files not tracked by svn |  Major | build | Chris 
Douglas | Chris Douglas |
-| [HADOOP-4796](https://issues.apache.org/jira/browse/HADOOP-4796) | Test 
target for chukwa build.xml needs to comply to hadoop build.xml test suites |  
Major | build | Eric Yang | Eric Yang |
-| [HADOOP-4579](https://issues.apache.org/jira/browse/HADOOP-4579) | 
StorageDirectory is not removed from the storage directories list when writing 
to an edits fails |  Major | . | Boris Shkolnik | Boris Shkolnik |
-| [HADOOP-4811](https://issues.apache.org/jira/browse/HADOOP-4811) | Import 
style sheet images for Chukwa |  Trivial | . | Eric Yang | Eric Yang |
-| [HADOOP-4805](https://issues.apache.org/jira/browse/HADOOP-4805) | Remove 
black list feature from Chukwa Agent to Chukwa Collector communication |  Major 
| . | Eric Yang | Eric Yang |
-| [HADOOP-4737](https://issues.apache.org/jira/browse/HADOOP-4737) | Job end 
notification should give status as "KILLED" when job gets killed. |  Major | . 
| Ruchir Shah | Amareshwari Sriramadasu |
-| [HADOOP-4825](https://issues.apache.org/jira/browse/HADOOP-4825) | Chukwa - 
change jps to ps for process status detection |  Major | . | Eric Yang | Eric 
Yang |
-| [HADOOP-4844](https://issues.apache.org/jira/browse/HADOOP-4844) | Document 
deprecation of o.a.h.fs.permission.AccessControlException better |  Minor | 
documentation, fs | Arun C Murthy | Arun C Murthy |
-| [HADOOP-4706](https://issues.apache.org/jira/browse/HADOOP-4706) | 
IFileOutputStream.close should call close of the underlying stream |  Minor | . 
| Jothi Padmanabhan | Jothi Padmanabhan |
-| [HADOOP-4683](https://issues.apache.org/jira/browse/HADOOP-4683) | Move the 
call to getMapCompletionEvents in ReduceTask.ReduceCopier.fetchOutputs to a 
separate thread |  Major | . | Devaraj Das | Jothi Padmanabhan |
-| [HADOOP-4855](https://issues.apache.org/jira/browse/HADOOP-4855) | Fix help 
message in MRAdmin |  Minor | fs, security | Arun C Murthy | Arun C Murthy |
-| [HADOOP-4820](https://issues.apache.org/jira/browse/HADOOP-4820) | Remove 
unused method FSNamesystem.deleteInSafeMode |  Minor | . | Suresh Srinivas | 
Suresh Srinivas |
-| [HADOOP-4698](https://issues.apache.org/jira/browse/HADOOP-4698) | 
TestMapRed fails with 64bit JDK |  Major | test | Nigel Daley | Nigel Daley |
-| [HADOOP-4860](https://issues.apache.org/jira/browse/HADOOP-4860) | File 
Tailing Adaptor test cases causes random failure |  Major | . | Eric Yang | 
Eric Yang |
-| [HADOOP-3921](https://issues.apache.org/jira/browse/HADOOP-3921) | Clover 
breaks nightly builds |  Major | build | Tom White | Tom White |
-| [HADOOP-4845](https://issues.apache.org/jira/browse/HADOOP-4845) | Shuffle 
counter issues |  Major | . | Chris Douglas | He Yongqiang |
-| [HADOOP-4879](https://issues.apache.org/jira/browse/HADOOP-4879) | 
TestJobTrackerRestart fails on trunk |  Blocker | test | Arun C Murthy | Owen 
O'Malley |
-| [HADOOP-4791](https://issues.apache.org/jira/browse/HADOOP-4791) | Improve 
rpm build process for Chukwa |  Major | . | Eric Yang | Eric Yang |
-| [HADOOP-4771](https://issues.apache.org/jira/browse/HADOOP-4771) | FSImage 
saveFSImage() will have problem. |  Major | . | Ruyue Ma | Ruyue Ma |
-| [HADOOP-4878](https://issues.apache.org/jira/browse/HADOOP-4878) | After 
introduction of ivy ant test-patch always returns -1 score |  Blocker | build | 
Sreekanth Ramakrishnan | Giridharan Kesavan |
-| [HADOOP-4874](https://issues.apache.org/jira/browse/HADOOP-4874) | Remove 
bindings to lzo |  Blocker | io | Owen O'Malley | Owen O'Malley |
-| [HADOOP-4774](https://issues.apache.org/jira/browse/HADOOP-4774) | 
CapacityScheduler should work even if capacity-scheduler.xml is not in the 
classpath i.e with the code defaults |  Major | . | Amar Kamat | Sreekanth 
Ramakrishnan |
-| [HADOOP-4876](https://issues.apache.org/jira/browse/HADOOP-4876) | Capacity 
reclaimation for queue would not work as intended |  Blocker | . | Sreekanth 
Ramakrishnan | Sreekanth Ramakrishnan |
-| [HADOOP-4782](https://issues.apache.org/jira/browse/HADOOP-4782) | [HOD] HOD 
opens up directory permissions more than required |  Blocker | contrib/hod | 
Hemanth Yamijala | Peeyush Bishnoi |
-| [HADOOP-4849](https://issues.apache.org/jira/browse/HADOOP-4849) | Document 
service level authorization - HADOOP-4348 |  Major | documentation, scripts | 
Arun C Murthy | Arun C Murthy |
-| [HADOOP-4894](https://issues.apache.org/jira/browse/HADOOP-4894) | fix 
Chukwa's jettyCollector.sh |  Minor | . | Ari Rabkin | Ari Rabkin |
-| [HADOOP-4892](https://issues.apache.org/jira/browse/HADOOP-4892) | File 
descriptor leak in Chukwa's ExecPlugin |  Major | . | Ari Rabkin | Ari Rabkin |
-| [HADOOP-4889](https://issues.apache.org/jira/browse/HADOOP-4889) | Chukwa 
RPM needs to chown user/group in build stage instead of post install stage. |  
Trivial | . | Eric Yang | Eric Yang |
-| [HADOOP-4869](https://issues.apache.org/jira/browse/HADOOP-4869) | Lost 
Trackers may not be able to join back |  Blocker | . | Devaraj Das | 
Amareshwari Sriramadasu |
-| [HADOOP-4716](https://issues.apache.org/jira/browse/HADOOP-4716) | 
testRestartWithLostTracker frequently times out |  Blocker | . | Johan 
Oskarsson | Amar Kamat |
-| [HADOOP-4854](https://issues.apache.org/jira/browse/HADOOP-4854) | Capacity 
Scheduler should read the reclaim-capacity-interval config value from its own 
config file |  Minor | . | Vivek Ratan | Sreekanth Ramakrishnan |
-| [HADOOP-4896](https://issues.apache.org/jira/browse/HADOOP-4896) | hdfs fsck 
does not load hdfs configuration. |  Blocker | . | Raghu Angadi | Raghu Angadi |
-| [HADOOP-4956](https://issues.apache.org/jira/browse/HADOOP-4956) | NPE when 
jobdetails.jsp |  Blocker | . | Devaraj Das | Devaraj Das |
-| [HADOOP-4979](https://issues.apache.org/jira/browse/HADOOP-4979) | Capacity 
Scheduler does not always return no task to a TT if a job's memry requirements 
are not met |  Major | . | Vivek Ratan | Vivek Ratan |
-| [HADOOP-4830](https://issues.apache.org/jira/browse/HADOOP-4830) | Have end 
to end tests based on MiniMRCluster to verify that queue capacities are 
honoured. |  Major | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
-| [HADOOP-4949](https://issues.apache.org/jira/browse/HADOOP-4949) | Native 
compilation is broken |  Blocker | . | Chris Douglas | Chris Douglas |
-| [HADOOP-4787](https://issues.apache.org/jira/browse/HADOOP-4787) | 
TestTrackerBlacklistAcrossJobs fails randomly |  Blocker | test | Hemanth 
Yamijala | Amareshwari Sriramadasu |
-| [HADOOP-4914](https://issues.apache.org/jira/browse/HADOOP-4914) | Support 
chkconfig for chukwa start up scripts |  Trivial | . | Eric Yang | Eric Yang |
-| [HADOOP-4884](https://issues.apache.org/jira/browse/HADOOP-4884) | Change 
Date format pattern for Time Series graph |  Trivial | . | Eric Yang | Eric 
Yang |
-| [HADOOP-4925](https://issues.apache.org/jira/browse/HADOOP-4925) | Chukwa 
HTTP connection policies are too hard to configure |  Major | . | Ari Rabkin | 
Ari Rabkin |
-| [HADOOP-4947](https://issues.apache.org/jira/browse/HADOOP-4947) | use regex 
to parse chukwa commands |  Minor | . | Ari Rabkin | Ari Rabkin |
-| [HADOOP-5026](https://issues.apache.org/jira/browse/HADOOP-5026) | Startup 
scripts should be svn-executable |  Minor | . | Andy Konwinski | Andy Konwinski 
|
-| [HADOOP-4977](https://issues.apache.org/jira/browse/HADOOP-4977) | Deadlock 
between reclaimCapacity and assignTasks |  Blocker | . | Matei Zaharia | Vivek 
Ratan |
-| [HADOOP-4988](https://issues.apache.org/jira/browse/HADOOP-4988) | An 
earlier fix, for HADOOP-4373, results in a problem with reclaiming capacity 
when one or more queues have a capacity equal to zero |  Blocker | . | Vivek 
Ratan | Vivek Ratan |
-| [HADOOP-5065](https://issues.apache.org/jira/browse/HADOOP-5065) | 
setOutputFormatClass in mapreduce.Job fails for SequenceFileOutputFormat |  
Major | . | Chris Douglas | Chris Douglas |
-| [HADOOP-4818](https://issues.apache.org/jira/browse/HADOOP-4818) | Enable 
JobTracker Instrumentation API with user job configuration |  Major | . | Eric 
Yang | Eric Yang |
-| [HADOOP-4993](https://issues.apache.org/jira/browse/HADOOP-4993) | chukwa 
agent startup should be more modular |  Major | . | Ari Rabkin | Ari Rabkin |
-| [HADOOP-5048](https://issues.apache.org/jira/browse/HADOOP-5048) | Sometimes 
job is still displayed in jobqueue\_details page for long time after job was 
killed. |  Major | . | Karam Singh | Sreekanth Ramakrishnan |
-| [HADOOP-5075](https://issues.apache.org/jira/browse/HADOOP-5075) | Potential 
infinite loop in updateMinSlots |  Blocker | . | Matei Zaharia | Matei Zaharia |
-| [HADOOP-4671](https://issues.apache.org/jira/browse/HADOOP-4671) | Make some 
"flag" booleans volatile because they are set/read in different threads |  
Minor | . | Owen O'Malley | Chris Douglas |
-| [HADOOP-4999](https://issues.apache.org/jira/browse/HADOOP-4999) | 
IndexOutOfBoundsException in FSEditLog |  Major | . | Boris Shkolnik | Boris 
Shkolnik |
-| [HADOOP-5139](https://issues.apache.org/jira/browse/HADOOP-5139) | RPC call 
throws IllegalArgumentException complaining duplicate metrics registration |  
Major | ipc | Hairong Kuang | Hairong Kuang |
-| [HADOOP-5085](https://issues.apache.org/jira/browse/HADOOP-5085) | Copying a 
file to local with Crc throws an exception |  Major | fs | Hairong Kuang | 
Hairong Kuang |
-| [HADOOP-5079](https://issues.apache.org/jira/browse/HADOOP-5079) |  
HashFunction inadvertently destroys some randomness |  Major | util | Jonathan 
Ellis | Jonathan Ellis |
-| [HADOOP-5211](https://issues.apache.org/jira/browse/HADOOP-5211) | 
TestSetupAndCleanupFailure fails with timeout |  Major | . | Enis Soztutar | 
Enis Soztutar |
-| [HADOOP-4873](https://issues.apache.org/jira/browse/HADOOP-4873) | display 
minMaps/Reduces on advanced scheduler page |  Major | . | Joydeep Sen Sarma | 
Joydeep Sen Sarma |
-| [HADOOP-4692](https://issues.apache.org/jira/browse/HADOOP-4692) |  Namenode 
in infinite loop for replicating/deleting corrupted block |  Major | . | 
Hairong Kuang | Hairong Kuang |
-| [HADOOP-5255](https://issues.apache.org/jira/browse/HADOOP-5255) | Fix for 
HADOOP-5079 HashFunction inadvertently destroys some randomness |  Minor | io | 
stack | Jonathan Ellis |
-| [HADOOP-5269](https://issues.apache.org/jira/browse/HADOOP-5269) | 
TaskTracker.runningTasks holding FAILED\_UNCLEAN and KILLED\_UNCLEAN 
taskStatuses forever in some cases. |  Blocker | . | Amareshwari Sriramadasu | 
Amareshwari Sriramadasu |
-| [HADOOP-5214](https://issues.apache.org/jira/browse/HADOOP-5214) | 
ConcurrentModificationException in FairScheduler.getTotalSlots |  Blocker | . | 
Vinod Kumar Vavilapalli | rahul k singh |
-| [HADOOP-5233](https://issues.apache.org/jira/browse/HADOOP-5233) | Reducer 
not Succeded after 100% |  Blocker | . | Amareshwari Sriramadasu | Amareshwari 
Sriramadasu |
-| [HADOOP-5247](https://issues.apache.org/jira/browse/HADOOP-5247) | NPEs in 
JobTracker and JobClient when mapred.jobtracker.completeuserjobs.maximum is set 
to zero. |  Blocker | . | Vinod Kumar Vavilapalli | Amar Kamat |
-| [HADOOP-5282](https://issues.apache.org/jira/browse/HADOOP-5282) | Running 
tasks on lost trackers are incorrectly logging the attempt and task failures |  
Blocker | . | Amar Kamat | Amar Kamat |
-| [HADOOP-4963](https://issues.apache.org/jira/browse/HADOOP-4963) | Logs 
saying org.apache.hadoop.util.DiskChecker$DiskErrorException in TaskTracker are 
not relevant |  Minor | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-5292](https://issues.apache.org/jira/browse/HADOOP-5292) | KFS: 
calling getFileBlockLocations() on 0-length file causes a NPE |  Major | . | 
Sriram Rao | Sriram Rao |
-| [HADOOP-5285](https://issues.apache.org/jira/browse/HADOOP-5285) | 
JobTracker hangs for long periods of time |  Blocker | . | Vinod Kumar 
Vavilapalli | Devaraj Das |
-| [HADOOP-5241](https://issues.apache.org/jira/browse/HADOOP-5241) | Reduce 
tasks get stuck because of over-estimated task size (regression from 0.18) |  
Blocker | . | Andy Pavlo | Sharad Agarwal |
-| [HADOOP-5142](https://issues.apache.org/jira/browse/HADOOP-5142) | 
MapWritable#putAll does not store classes |  Minor | io | Doğacan Güney |  |
-| [HADOOP-5280](https://issues.apache.org/jira/browse/HADOOP-5280) | When 
expiring a lost launched task, JT doesn't remove the attempt from the 
taskidToTIPMap. |  Blocker | . | Vinod Kumar Vavilapalli | Devaraj Das |
-| [HADOOP-5272](https://issues.apache.org/jira/browse/HADOOP-5272) | 
JobTracker does not log TIP start information after restart |  Critical | . | 
Amar Kamat | Amar Kamat |
-| [HADOOP-5154](https://issues.apache.org/jira/browse/HADOOP-5154) | 4-way 
deadlock in FairShare scheduler |  Blocker | . | Vinod Kumar Vavilapalli | 
Matei Zaharia |
-| [HADOOP-5306](https://issues.apache.org/jira/browse/HADOOP-5306) | Job 
History file can have empty string as http port after JobTracker Restart in 
case of lost TT, which can result in NumberFormatException when JT is restarted 
2nd time |  Blocker | . | Ravi Gummadi | Amar Kamat |
-| [HADOOP-5248](https://issues.apache.org/jira/browse/HADOOP-5248) | Job 
directories could remain undeleted in some scenarios after job completes. |  
Blocker | . | Hemanth Yamijala | Devaraj Das |
-| [HADOOP-5111](https://issues.apache.org/jira/browse/HADOOP-5111) | Generic 
mapreduce classes cannot be used with Job::set\* methods |  Major | . | Chris 
Douglas | Chris Douglas |
-| [HADOOP-5146](https://issues.apache.org/jira/browse/HADOOP-5146) | 
LocalDirAllocator misses files on the local filesystem |  Blocker | . | Arun C 
Murthy | Devaraj Das |
-| [HADOOP-5326](https://issues.apache.org/jira/browse/HADOOP-5326) | bzip2 
codec (CBZip2OutputStream) creates corrupted output file for some inputs |  
Major | io | Rodrigo Schmidt | Rodrigo Schmidt |
-| [HADOOP-4744](https://issues.apache.org/jira/browse/HADOOP-4744) | Wrong 
resolution of hostname and port |  Blocker | . | Amareshwari Sriramadasu | 
Jothi Padmanabhan |
-| [HADOOP-4638](https://issues.apache.org/jira/browse/HADOOP-4638) | Exception 
thrown in/from RecoveryManager.recover() should be caught and handled |  
Blocker | . | Amar Kamat | Amar Kamat |
-| [HADOOP-5274](https://issues.apache.org/jira/browse/HADOOP-5274) | gridmix2 
is not getting compiled to generate gridmix.jar |  Critical | benchmarks | 
Suman Sehgal | Chris Douglas |
-| [HADOOP-5066](https://issues.apache.org/jira/browse/HADOOP-5066) | ant 
binary should not compile docs |  Major | build | Amareshwari Sriramadasu | 
Giridharan Kesavan |
-| [HADOOP-5384](https://issues.apache.org/jira/browse/HADOOP-5384) | 
DataNodeCluster should not create blocks with generationStamp == 1 |  Blocker | 
test | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-5145](https://issues.apache.org/jira/browse/HADOOP-5145) | Balancer 
sometimes runs out of memory after days or weeks running |  Major | . | Hairong 
Kuang | Hairong Kuang |
-| [HADOOP-5338](https://issues.apache.org/jira/browse/HADOOP-5338) | Reduce 
tasks are stuck waiting for map outputs when none are in progress |  Blocker | 
. | Ramya Sunil | Amar Kamat |
-| [HADOOP-5376](https://issues.apache.org/jira/browse/HADOOP-5376) | 
JobInProgress.obtainTaskCleanupTask() throws an ArrayIndexOutOfBoundsException 
|  Blocker | . | Vinod Kumar Vavilapalli | Amareshwari Sriramadasu |
-| [HADOOP-4695](https://issues.apache.org/jira/browse/HADOOP-4695) | 
TestGlobalFilter.testServletFilter fails |  Blocker | test | Tsz Wo Nicholas 
Sze | Kan Zhang |
-| [HADOOP-5298](https://issues.apache.org/jira/browse/HADOOP-5298) | Unit test 
fails out on trunk org.apache.hadoop.http.TestServletFilter.testServletFilter | 
 Major | test | Lee Tucker | Tsz Wo Nicholas Sze |
-| [HADOOP-5432](https://issues.apache.org/jira/browse/HADOOP-5432) | 
TestHdfsProxy fails on 0.20 |  Major | . | Chris Douglas | Chris Douglas |
-| [HADOOP-5416](https://issues.apache.org/jira/browse/HADOOP-5416) | Wrong 
description of " hadoop fs -test " in FS Shell guide . |  Trivial | 
documentation | Ravi Phulari | Ravi Phulari |
-| [HADOOP-5327](https://issues.apache.org/jira/browse/HADOOP-5327) | Job files 
for a job failing because of  ACLs are not clean from the system directory |  
Blocker | . | Karam Singh | Amar Kamat |
-| [HADOOP-5440](https://issues.apache.org/jira/browse/HADOOP-5440) | 
Successful taskid are not removed from TaskMemoryManager |  Blocker | . | 
Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-5465](https://issues.apache.org/jira/browse/HADOOP-5465) | Blocks 
remain under-replicated |  Blocker | . | Hairong Kuang | Hairong Kuang |
-| [HADOOP-5490](https://issues.apache.org/jira/browse/HADOOP-5490) | 
TestParallelInitialization failed on NoSuchElementException |  Blocker | . | 
Hairong Kuang | Jothi Padmanabhan |
-| [HADOOP-5493](https://issues.apache.org/jira/browse/HADOOP-5493) | Shuffle 
copiers do not return Codecs back to the pool at the end of shuffling |  
Blocker | . | Devaraj Das | Jothi Padmanabhan |
-| [HADOOP-5505](https://issues.apache.org/jira/browse/HADOOP-5505) | 
TestMissingBlocksAlert fails on 0.20. |  Major | . | Raghu Angadi | Raghu 
Angadi |
-| [HADOOP-5414](https://issues.apache.org/jira/browse/HADOOP-5414) | IO 
exception while executing hadoop fs -touchz  fileName |  Major | fs | Ravi 
Phulari | Hairong Kuang |
-| [HADOOP-5483](https://issues.apache.org/jira/browse/HADOOP-5483) | 
Directory/file cleanup thread throws IllegalStateException |  Major | . | 
Hairong Kuang |  |
-| [HADOOP-5281](https://issues.apache.org/jira/browse/HADOOP-5281) | GzipCodec 
fails second time it is used in a process |  Blocker | . | Ben Maurer | Chris 
Douglas |
-| [HADOOP-5463](https://issues.apache.org/jira/browse/HADOOP-5463) | Balancer 
throws "Not a host:port pair" unless port is specified in fs.default.name |  
Minor | . | Stuart White | Stuart White |
-| [HADOOP-5479](https://issues.apache.org/jira/browse/HADOOP-5479) | NameNode 
should not send empty block replication request to DataNode |  Critical | . | 
Hairong Kuang | Hairong Kuang |
-| [HADOOP-5259](https://issues.apache.org/jira/browse/HADOOP-5259) | Job with 
output hdfs:/user/\<username\>/outputpath (no authority) fails with Wrong FS |  
Major | fs | Koji Noguchi | Doug Cutting |
-| [HADOOP-5499](https://issues.apache.org/jira/browse/HADOOP-5499) | 
JobTracker metrics do not match job counters |  Major | metrics | Chris Douglas 
|  |
-| [HADOOP-5516](https://issues.apache.org/jira/browse/HADOOP-5516) | 
TaskMemoryManagerThread crashes in a corner case |  Blocker | . | Vinod Kumar 
Vavilapalli | Vinod Kumar Vavilapalli |
-| [HADOOP-5382](https://issues.apache.org/jira/browse/HADOOP-5382) | The new 
map/reduce api doesn't support combiners |  Blocker | . | Owen O'Malley | Owen 
O'Malley |
-| [HADOOP-5471](https://issues.apache.org/jira/browse/HADOOP-5471) | SyncLogs 
thread in Child.java would update wrong file for a cleanup attempt, in some 
cases. |  Major | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-5522](https://issues.apache.org/jira/browse/HADOOP-5522) | Document 
job setup/cleaup tasks and task cleanup tasks in mapred tutorial |  Blocker | . 
| Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-5534](https://issues.apache.org/jira/browse/HADOOP-5534) | Deadlock 
triggered by FairScheduler scheduler's servlet due to changes from HADOOP-5214. 
|  Blocker | . | Vinod Kumar Vavilapalli | rahul k singh |
-| [HADOOP-5328](https://issues.apache.org/jira/browse/HADOOP-5328) | Renaming 
of Job histroy file is incorrect if Jobtracker is restarted multimple times |  
Major | . | Karam Singh | Amar Kamat |
-| [HADOOP-5417](https://issues.apache.org/jira/browse/HADOOP-5417) | IPC 
client drops interrupted exceptions |  Blocker | ipc | Owen O'Malley | Owen 
O'Malley |
-| [HADOOP-5320](https://issues.apache.org/jira/browse/HADOOP-5320) | 
TestMapReduceLocal is missing a close() that is causing it to fail while 
running the test on NFS |  Minor | test | Jothi Padmanabhan | Jothi Padmanabhan 
|
-| [HADOOP-5549](https://issues.apache.org/jira/browse/HADOOP-5549) | 
ReplicationMonitor should schedule both replication and deletion work in one 
iteration |  Major | . | Hairong Kuang | Hairong Kuang |
-| [HADOOP-5554](https://issues.apache.org/jira/browse/HADOOP-5554) | 
DataNodeCluster should create blocks with the same generation stamp as the 
blocks created in CreateEditsLog |  Major | test | Hairong Kuang | Hairong 
Kuang |
-| [HADOOP-5484](https://issues.apache.org/jira/browse/HADOOP-5484) | 
TestRecoveryManager fails wtih FileAlreadyExistsException |  Major | test | 
Hairong Kuang | Amar Kamat |
-| [HADOOP-5557](https://issues.apache.org/jira/browse/HADOOP-5557) | Two minor 
problems in TestOverReplicatedBlocks |  Minor | test | Tsz Wo Nicholas Sze | 
Tsz Wo Nicholas Sze |
-| [HADOOP-5564](https://issues.apache.org/jira/browse/HADOOP-5564) | hadoop 
command uses large JVM heap size |  Blocker | build | Suresh Srinivas | Suresh 
Srinivas |
-| [HADOOP-5565](https://issues.apache.org/jira/browse/HADOOP-5565) | The job 
instrumentation API needs to have a method for finalizeJob, |  Major | . | 
Jerome Boulon | Jerome Boulon |
-| [HADOOP-5390](https://issues.apache.org/jira/browse/HADOOP-5390) | hdfsproxy 
includes duplicate jars in tarball, source in binary tarball |  Major | build | 
Chris Douglas | zhiyong zhang |
-| [HADOOP-5459](https://issues.apache.org/jira/browse/HADOOP-5459) | CRC 
errors not detected reading intermediate output into memory with problematic 
length |  Major | . | Chris Douglas | Chris Douglas |
-| [HADOOP-5571](https://issues.apache.org/jira/browse/HADOOP-5571) | 
TupleWritable can return incorrect results if it contains more than 32 values | 
 Major | . | Jingkei Ly | Jingkei Ly |
-| [HADOOP-5588](https://issues.apache.org/jira/browse/HADOOP-5588) | hadoop 
commands seem extremely slow in 0.20 branch |  Blocker | fs | Koji Noguchi | 
Hairong Kuang |
-| [HADOOP-5473](https://issues.apache.org/jira/browse/HADOOP-5473) | Race 
condition in command-line kill for a task |  Major | . | Amareshwari 
Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-5551](https://issues.apache.org/jira/browse/HADOOP-5551) | Namenode 
permits directory destruction on overwrite |  Critical | . | Brian Bockelman | 
Brian Bockelman |
-| [HADOOP-5576](https://issues.apache.org/jira/browse/HADOOP-5576) | 
LocalJobRunner does not run jobs using new MapReduce API |  Blocker | . | Tom 
White | Tom White |
-| [HADOOP-4374](https://issues.apache.org/jira/browse/HADOOP-4374) | JVM 
should not be killed but given an opportunity to exit gracefully |  Major | . | 
Devaraj Das | Ravi Gummadi |
-| [HADOOP-5577](https://issues.apache.org/jira/browse/HADOOP-5577) | The 
Job.waitForCompletion doesn't print status as the job runs |  Blocker | . | 
Owen O'Malley | Owen O'Malley |
-| [HADOOP-5607](https://issues.apache.org/jira/browse/HADOOP-5607) | 
TestCapacityScheduler fails with NPE |  Major | test | Chris Douglas | Chris 
Douglas |
-| [HADOOP-5605](https://issues.apache.org/jira/browse/HADOOP-5605) | All the 
replicas incorrectly got marked as corrupt. |  Blocker | . | Raghu Angadi | 
Hairong Kuang |
-| [HADOOP-5337](https://issues.apache.org/jira/browse/HADOOP-5337) | 
JobTracker greedily schedules tasks without running tasks to join |  Major | . 
| Karam Singh | Amar Kamat |
-| [HADOOP-5227](https://issues.apache.org/jira/browse/HADOOP-5227) | distcp 
-delete option deletes all files from the destination directory |  Major | . | 
Suhas Gogate | Tsz Wo Nicholas Sze |
-| [HADOOP-5305](https://issues.apache.org/jira/browse/HADOOP-5305) | Unit test 
org.apache.hadoop.fs.TestCopyFiles.testMapCount fails on trunk |  Minor | test 
| Ramya Sunil | Tsz Wo Nicholas Sze |
-| [HADOOP-5437](https://issues.apache.org/jira/browse/HADOOP-5437) | Unit test 
for jvm -reuse |  Blocker | . | Amareshwari Sriramadasu | Owen O'Malley |
-| [HADOOP-5548](https://issues.apache.org/jira/browse/HADOOP-5548) | Observed 
negative running maps on the job tracker |  Blocker | . | Owen O'Malley | 
Amareshwari Sriramadasu |
-| [HADOOP-3810](https://issues.apache.org/jira/browse/HADOOP-3810) | NameNode 
seems unstable on a cluster with little space left |  Major | . | Raghu Angadi 
| Hairong Kuang |
-| [HADOOP-5068](https://issues.apache.org/jira/browse/HADOOP-5068) | 
testClusterBlockingForLackOfMemory in TestCapacityScheduler fails randomly |  
Major | . | Sreekanth Ramakrishnan | Vinod Kumar Vavilapalli |
-| [HADOOP-5585](https://issues.apache.org/jira/browse/HADOOP-5585) | 
FileSystem statistic counters are too high when JVM reuse is enabled. |  
Blocker | . | Owen O'Malley | Owen O'Malley |
-| [HADOOP-5394](https://issues.apache.org/jira/browse/HADOOP-5394) | 
JobTracker might schedule 2 attempts of the same task with the same attempt id 
across restarts |  Critical | . | Amar Kamat | Amar Kamat |
-| [HADOOP-5645](https://issues.apache.org/jira/browse/HADOOP-5645) | After 
HADOOP-4920 we need a place to checkin releasenotes.html |  Major | build | 
Nigel Daley | Nigel Daley |
-| [HADOOP-5644](https://issues.apache.org/jira/browse/HADOOP-5644) | Namnode 
is stuck in safe mode |  Major | . | Suresh Srinivas | Suresh Srinivas |
-
-
-### TESTS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-4505](https://issues.apache.org/jira/browse/HADOOP-4505) | Add a 
unit test to test faulty setup task and cleanup task killing the job |  Major | 
. | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-4722](https://issues.apache.org/jira/browse/HADOOP-4722) | adding 
tests for quotas command line error  messages |  Minor | test | Boris Shkolnik 
| Boris Shkolnik |
-| [HADOOP-4688](https://issues.apache.org/jira/browse/HADOOP-4688) | multiple 
spills/reducers test case for mergeParts() needed |  Major | . | Yuri Pradkin | 
Chris Douglas |
-| [HADOOP-4728](https://issues.apache.org/jira/browse/HADOOP-4728) | Tests for 
NameNode -checkpoint option with different configurations |  Minor | . | Boris 
Shkolnik | Boris Shkolnik |
-| [HADOOP-4857](https://issues.apache.org/jira/browse/HADOOP-4857) | 
TestUlimit is failing after Hadoop-4620 |  Blocker | test | Sharad Agarwal | 
Ravi Gummadi |
-| [HADOOP-4458](https://issues.apache.org/jira/browse/HADOOP-4458) | Add a 
unit test for applications creating symlinks in wokring  directory |  Major | 
test | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-3192](https://issues.apache.org/jira/browse/HADOOP-3192) | Test 
behavior of very large (32GB) name nodes |  Major | . | Robert Chansler |  |
-
-
-### SUB-TASKS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-4187](https://issues.apache.org/jira/browse/HADOOP-4187) | Create a 
MapReduce-specific ReflectionUtils that handles JobConf and JobConfigurable |  
Major | . | Tom White | Sharad Agarwal |
-| [HADOOP-4612](https://issues.apache.org/jira/browse/HADOOP-4612) | Remove 
RunJar's dependency on JobClient |  Major | . | Sharad Agarwal | Sharad Agarwal 
|
-| [HADOOP-4185](https://issues.apache.org/jira/browse/HADOOP-4185) | Add 
setVerifyChecksum() method to FileSystem |  Major | fs | Tom White | Sharad 
Agarwal |
-
-

http://git-wip-us.apache.org/repos/asf/hadoop/blob/4b8c2b1c/hadoop-common-project/hadoop-common/src/site/markdown/release/0.20.1/CHANGELOG.0.20.1.md
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new file mode 100644
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@@ -0,0 +1,127 @@
+
+<!---
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+-->
+# Apache Hadoop Changelog
+
+## Release 0.20.1 - 2009-09-01
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-5726](https://issues.apache.org/jira/browse/HADOOP-5726) | Remove 
pre-emption from the capacity scheduler code base |  Major | . | Hemanth 
Yamijala | rahul k singh |
+| [HADOOP-5881](https://issues.apache.org/jira/browse/HADOOP-5881) | Simplify 
configuration related to task-memory-monitoring and memory-based scheduling |  
Major | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-5714](https://issues.apache.org/jira/browse/HADOOP-5714) | Metric to 
show number of fs.exists (or number of getFileInfo) calls |  Minor | metrics | 
Koji Noguchi | Jakob Homan |
+| [HADOOP-3315](https://issues.apache.org/jira/browse/HADOOP-3315) | New 
binary file format |  Major | io | Owen O'Malley | Hong Tang |
+| [HADOOP-6080](https://issues.apache.org/jira/browse/HADOOP-6080) | Handling 
of  Trash with quota |  Major | fs | Koji Noguchi | Jakob Homan |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [MAPREDUCE-465](https://issues.apache.org/jira/browse/MAPREDUCE-465) | 
Deprecate org.apache.hadoop.mapred.lib.MultithreadedMapRunner |  Minor | . | 
Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HDFS-527](https://issues.apache.org/jira/browse/HDFS-527) | Refactor 
DFSClient constructors |  Major | hdfs-client | Tsz Wo Nicholas Sze | Tsz Wo 
Nicholas Sze |
+| [MAPREDUCE-767](https://issues.apache.org/jira/browse/MAPREDUCE-767) | to 
remove mapreduce dependency on commons-cli2 |  Major | contrib/streaming | 
Giridharan Kesavan | Amar Kamat |
+| [HDFS-635](https://issues.apache.org/jira/browse/HDFS-635) | HDFS Project 
page does not show 0.20.1 documentation/release information. |  Major | 
documentation | Andy Sautins |  |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-5210](https://issues.apache.org/jira/browse/HADOOP-5210) | Reduce 
Task Progress shows \> 100% when the total size of map outputs (for a single 
reducer) is high |  Minor | . | Jothi Padmanabhan | Ravi Gummadi |
+| [HADOOP-5654](https://issues.apache.org/jira/browse/HADOOP-5654) | 
TestReplicationPolicy.\<init\> fails on java.net.BindException |  Major | test 
| Hairong Kuang | Hairong Kuang |
+| [HADOOP-5655](https://issues.apache.org/jira/browse/HADOOP-5655) | 
TestMRServerPorts fails on java.net.BindException |  Major | . | Hairong Kuang 
| Devaraj Das |
+| [HADOOP-5533](https://issues.apache.org/jira/browse/HADOOP-5533) | Recovery 
duration shown on the jobtracker webpage is inaccurate |  Major | . | Amar 
Kamat | Amar Kamat |
+| [HADOOP-5646](https://issues.apache.org/jira/browse/HADOOP-5646) | 
TestQueueCapacities is failing Hudson tests for the last few builds |  Major | 
. | Jothi Padmanabhan | Vinod Kumar Vavilapalli |
+| [HADOOP-5691](https://issues.apache.org/jira/browse/HADOOP-5691) | 
org.apache.hadoop.mapreduce.Reducer should not be abstract. |  Major | . | 
Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [HADOOP-5688](https://issues.apache.org/jira/browse/HADOOP-5688) | 
HftpFileSystem.getChecksum(..) does not work for the paths with scheme and 
authority |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-4674](https://issues.apache.org/jira/browse/HADOOP-4674) | hadoop fs 
-help should list detailed help info for the following commands: test, text, 
tail, stat & touchz |  Trivial | fs | David NeSmith | Ravi Phulari |
+| [HADOOP-5711](https://issues.apache.org/jira/browse/HADOOP-5711) | Change 
Namenode file close log to info |  Minor | . | Tsz Wo Nicholas Sze | Tsz Wo 
Nicholas Sze |
+| [HADOOP-5213](https://issues.apache.org/jira/browse/HADOOP-5213) | 
BZip2CompressionOutputStream NullPointerException |  Blocker | io | Zheng Shao 
| Zheng Shao |
+| [HADOOP-5736](https://issues.apache.org/jira/browse/HADOOP-5736) | Update 
CapacityScheduler documentation to reflect latest changes |  Major | . | 
Sreekanth Ramakrishnan | Sreekanth Ramakrishnan |
+| [HADOOP-5718](https://issues.apache.org/jira/browse/HADOOP-5718) | Capacity 
Scheduler should not check for presence of default queue while starting up. |  
Major | . | Sreekanth Ramakrishnan | Sreekanth Ramakrishnan |
+| [HADOOP-5719](https://issues.apache.org/jira/browse/HADOOP-5719) | Jobs 
failed during job initalization are never removed from Capacity Schedulers 
waiting list |  Major | . | Sreekanth Ramakrishnan | Sreekanth Ramakrishnan |
+| [HADOOP-5349](https://issues.apache.org/jira/browse/HADOOP-5349) | When the 
size required for a path is -1, LocalDirAllocator.getLocalPathForWrite fails 
with a DiskCheckerException when the disk it selects is bad. |  Major | . | 
Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
+| [HADOOP-5636](https://issues.apache.org/jira/browse/HADOOP-5636) | Job is 
left in Running state after a killJob |  Critical | . | Amareshwari Sriramadasu 
| Amar Kamat |
+| [HADOOP-5641](https://issues.apache.org/jira/browse/HADOOP-5641) | Possible 
NPE in CapacityScheduler's MemoryMatcher |  Major | . | Vinod Kumar Vavilapalli 
| Hemanth Yamijala |
+| [HADOOP-5828](https://issues.apache.org/jira/browse/HADOOP-5828) | Use 
absolute path for JobTracker's mapred.local.dir in MiniMRCluster |  Major | 
test | Hemanth Yamijala | Hemanth Yamijala |
+| [HADOOP-5850](https://issues.apache.org/jira/browse/HADOOP-5850) | 
map/reduce doesn't run jobs with 0 maps |  Critical | . | Owen O'Malley | Vinod 
Kumar Vavilapalli |
+| [HADOOP-4626](https://issues.apache.org/jira/browse/HADOOP-4626) | API link 
in forrest doc should point to the same version of hadoop. |  Minor | 
documentation | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HADOOP-5883](https://issues.apache.org/jira/browse/HADOOP-5883) | 
TaskMemoryMonitorThread might shoot down tasks even if their processes 
momentarily exceed the requested memory |  Major | . | Hemanth Yamijala | 
Hemanth Yamijala |
+| [HADOOP-5539](https://issues.apache.org/jira/browse/HADOOP-5539) | 
o.a.h.mapred.Merger not maintaining map out compression on intermediate files | 
 Blocker | . | Billy Pearson | Jothi Padmanabhan |
+| [HADOOP-5932](https://issues.apache.org/jira/browse/HADOOP-5932) | 
MemoryMatcher logs 0 as freeMemOnTT even though there are free slots available 
on TaskTraker |  Major | . | Karam Singh | Vinod Kumar Vavilapalli |
+| [HADOOP-5951](https://issues.apache.org/jira/browse/HADOOP-5951) | 
StorageInfo needs Apache license header. |  Major | . | Suresh Srinivas | 
Suresh Srinivas |
+| [HADOOP-5648](https://issues.apache.org/jira/browse/HADOOP-5648) | Not able 
to generate gridmix.jar on already compiled version of hadoop |  Major | 
benchmarks | Suman Sehgal | Giridharan Kesavan |
+| [HADOOP-5908](https://issues.apache.org/jira/browse/HADOOP-5908) | 
ArithmeticException in heartbeats with zero map jobs |  Major | . | Vinod Kumar 
Vavilapalli | Amar Kamat |
+| [HADOOP-5924](https://issues.apache.org/jira/browse/HADOOP-5924) | JT fails 
to recover the jobs after restart after HADOOP:4372 |  Major | . | Ramya Sunil 
| Amar Kamat |
+| [HADOOP-5882](https://issues.apache.org/jira/browse/HADOOP-5882) | Progress 
is not updated when the New Reducer is running reduce phase |  Blocker | . | 
Jothi Padmanabhan | Amareshwari Sriramadasu |
+| [HADOOP-5746](https://issues.apache.org/jira/browse/HADOOP-5746) | Errors 
encountered in MROutputThread after the last map/reduce call can go undetected 
|  Major | . | Devaraj Das | Amar Kamat |
+| [HADOOP-5884](https://issues.apache.org/jira/browse/HADOOP-5884) | Capacity 
scheduler should account high memory jobs as using more capacity of the queue | 
 Major | . | Hemanth Yamijala | Vinod Kumar Vavilapalli |
+| [HADOOP-5937](https://issues.apache.org/jira/browse/HADOOP-5937) | Correct  
info message  "Use hadoop dfs -safemode option"  to  " Use hdfs dfsadmin 
-safemode option"  . |  Minor | . | Ravi Phulari | Ravi Phulari |
+| [HADOOP-5921](https://issues.apache.org/jira/browse/HADOOP-5921) | 
JobTracker does not come up because of NotReplicatedYetException |  Major | . | 
Amareshwari Sriramadasu | Amar Kamat |
+| [HADOOP-6017](https://issues.apache.org/jira/browse/HADOOP-6017) | NameNode 
and SecondaryNameNode fail to restart because of abnormal filenames. |  Blocker 
| . | Raghu Angadi | Tsz Wo Nicholas Sze |
+| [HADOOP-5920](https://issues.apache.org/jira/browse/HADOOP-5920) | 
TestJobHistory fails some times. |  Major | . | Amareshwari Sriramadasu | Amar 
Kamat |
+| [HDFS-26](https://issues.apache.org/jira/browse/HDFS-26) |    HADOOP-5862 
for version .20  (Namespace quota exceeded message unclear) |  Major | . | 
Boris Shkolnik | Boris Shkolnik |
+| [HDFS-438](https://issues.apache.org/jira/browse/HDFS-438) | Improve help 
message for quotas |  Minor | . | Raghu Angadi | Raghu Angadi |
+| [MAPREDUCE-2](https://issues.apache.org/jira/browse/MAPREDUCE-2) | 
ArrayOutOfIndex error in KeyFieldBasedPartitioner on empty key |  Major | . | 
Amar Kamat | Amar Kamat |
+| [MAPREDUCE-130](https://issues.apache.org/jira/browse/MAPREDUCE-130) | 
Delete the jobconf copy from the log directory of the JobTracker when the job 
is retired |  Major | . | Devaraj Das | Amar Kamat |
+| [MAPREDUCE-657](https://issues.apache.org/jira/browse/MAPREDUCE-657) | 
CompletedJobStatusStore hardcodes filesystem to hdfs |  Major | jobtracker | 
Amar Kamat | Amar Kamat |
+| [MAPREDUCE-179](https://issues.apache.org/jira/browse/MAPREDUCE-179) | 
setProgress not called for new RecordReaders |  Blocker | . | Chris Douglas | 
Chris Douglas |
+| [MAPREDUCE-124](https://issues.apache.org/jira/browse/MAPREDUCE-124) | When 
abortTask of OutputCommitter fails with an Exception for a map-only job, the 
task is marked as success |  Major | . | Jothi Padmanabhan | Amareshwari 
Sriramadasu |
+| [HADOOP-6139](https://issues.apache.org/jira/browse/HADOOP-6139) | 
Incomplete help message is displayed for rm and rmr options. |  Minor | . | 
Suman Sehgal | Jakob Homan |
+| [HADOOP-6141](https://issues.apache.org/jira/browse/HADOOP-6141) | hadoop 
0.20 branch "test-patch" is broken |  Major | build | Hong Tang | Hong Tang |
+| [HADOOP-6145](https://issues.apache.org/jira/browse/HADOOP-6145) | No error 
message for deleting non-existant file or directory. |  Major | fs | Suman 
Sehgal | Jakob Homan |
+| [MAPREDUCE-565](https://issues.apache.org/jira/browse/MAPREDUCE-565) | 
Partitioner does not work with new API |  Blocker | task | Jothi Padmanabhan | 
Owen O'Malley |
+| [MAPREDUCE-18](https://issues.apache.org/jira/browse/MAPREDUCE-18) | Under 
load the shuffle sometimes gets incorrect data |  Blocker | . | Owen O'Malley | 
Ravi Gummadi |
+| [MAPREDUCE-735](https://issues.apache.org/jira/browse/MAPREDUCE-735) | 
ArrayIndexOutOfBoundsException is thrown by KeyFieldBasedPartitioner |  Major | 
. | Suman Sehgal | Amar Kamat |
+| [MAPREDUCE-383](https://issues.apache.org/jira/browse/MAPREDUCE-383) | pipes 
combiner does not reset properly after a spill |  Major | . | Christian Kunz | 
Christian Kunz |
+| [MAPREDUCE-40](https://issues.apache.org/jira/browse/MAPREDUCE-40) | Memory 
management variables need a backwards compatibility option after HADOOP-5881 |  
Blocker | . | Hemanth Yamijala | rahul k singh |
+| [MAPREDUCE-796](https://issues.apache.org/jira/browse/MAPREDUCE-796) | 
Encountered "ClassCastException" on tasktracker while running wordcount with 
MultithreadedMapRunner |  Major | examples | Suman Sehgal | Amar Kamat |
+| [MAPREDUCE-838](https://issues.apache.org/jira/browse/MAPREDUCE-838) | Task 
succeeds even when committer.commitTask fails with IOException |  Blocker | 
task | Koji Noguchi | Amareshwari Sriramadasu |
+| [MAPREDUCE-805](https://issues.apache.org/jira/browse/MAPREDUCE-805) | 
Deadlock in Jobtracker |  Major | . | Michael Tamm | Amar Kamat |
+| [HDFS-167](https://issues.apache.org/jira/browse/HDFS-167) | DFSClient 
continues to retry indefinitely |  Minor | hdfs-client | Derek Wollenstein | 
Bill Zeller |
+| [MAPREDUCE-832](https://issues.apache.org/jira/browse/MAPREDUCE-832) | Too 
many WARN messages about deprecated memorty config variables in JobTacker log | 
 Major | . | Karam Singh | rahul k singh |
+| [MAPREDUCE-745](https://issues.apache.org/jira/browse/MAPREDUCE-745) | 
TestRecoveryManager fails sometimes |  Major | jobtracker | Amareshwari 
Sriramadasu | Amar Kamat |
+| [MAPREDUCE-834](https://issues.apache.org/jira/browse/MAPREDUCE-834) | When 
TaskTracker config use old memory management values its memory monitoring is 
diabled. |  Major | . | Karam Singh | Sreekanth Ramakrishnan |
+| [MAPREDUCE-818](https://issues.apache.org/jira/browse/MAPREDUCE-818) | 
org.apache.hadoop.mapreduce.Counters.getGroup returns null if the group name 
doesnt exist. |  Minor | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
+| [MAPREDUCE-807](https://issues.apache.org/jira/browse/MAPREDUCE-807) | Stray 
user files in mapred.system.dir with permissions other than 777 can prevent the 
jobtracker from starting up. |  Blocker | jobtracker | Amar Kamat | Amar Kamat |
+| [MAPREDUCE-430](https://issues.apache.org/jira/browse/MAPREDUCE-430) | Task 
stuck in cleanup with OutOfMemoryErrors |  Major | . | Amareshwari Sriramadasu 
| Amar Kamat |
+| [HADOOP-6215](https://issues.apache.org/jira/browse/HADOOP-6215) | fix 
GenericOptionParser to deal with -D with '=' in the value |  Major | . | Owen 
O'Malley | Amar Kamat |
+| [MAPREDUCE-421](https://issues.apache.org/jira/browse/MAPREDUCE-421) | 
mapred pipes might return exit code 0 even when failing |  Major | pipes | 
Christian Kunz | Christian Kunz |
+| [HDFS-525](https://issues.apache.org/jira/browse/HDFS-525) | 
ListPathsServlet.java uses static SimpleDateFormat that has threading issues |  
Major | namenode | Suresh Srinivas | Suresh Srinivas |
+| [MAPREDUCE-911](https://issues.apache.org/jira/browse/MAPREDUCE-911) | 
TestTaskFail fail sometimes |  Major | test | Amareshwari Sriramadasu | 
Amareshwari Sriramadasu |
+| [MAPREDUCE-687](https://issues.apache.org/jira/browse/MAPREDUCE-687) | 
TestMiniMRMapRedDebugScript fails sometimes |  Major | test | Amar Kamat | 
Amareshwari Sriramadasu |
+| [MAPREDUCE-924](https://issues.apache.org/jira/browse/MAPREDUCE-924) | 
TestPipes must not directly invoke 'main' of pipes as an exit from main could 
cause the testcase to crash. |  Major | pipes | Amareshwari Sriramadasu | 
Amareshwari Sriramadasu |
+| [HDFS-1022](https://issues.apache.org/jira/browse/HDFS-1022) | Merge 
under-10-min tests specs into one file |  Major | test | Erik Steffl | Erik 
Steffl |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-6213](https://issues.apache.org/jira/browse/HADOOP-6213) | Remove 
commons dependency on commons-cli2 |  Blocker | util | Amar Kamat | Amar Kamat |
+
+

http://git-wip-us.apache.org/repos/asf/hadoop/blob/4b8c2b1c/hadoop-common-project/hadoop-common/src/site/markdown/release/0.20.1/CHANGES.0.20.1.md
----------------------------------------------------------------------
diff --git 
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deleted file mode 100644
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--- 
a/hadoop-common-project/hadoop-common/src/site/markdown/release/0.20.1/CHANGES.0.20.1.md
+++ /dev/null
@@ -1,127 +0,0 @@
-
-<!---
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
--->
-# Apache Hadoop Changelog
-
-## Release 0.20.1 - 2009-09-01
-
-### INCOMPATIBLE CHANGES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-5726](https://issues.apache.org/jira/browse/HADOOP-5726) | Remove 
pre-emption from the capacity scheduler code base |  Major | . | Hemanth 
Yamijala | rahul k singh |
-| [HADOOP-5881](https://issues.apache.org/jira/browse/HADOOP-5881) | Simplify 
configuration related to task-memory-monitoring and memory-based scheduling |  
Major | . | Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
-
-
-### NEW FEATURES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-5714](https://issues.apache.org/jira/browse/HADOOP-5714) | Metric to 
show number of fs.exists (or number of getFileInfo) calls |  Minor | metrics | 
Koji Noguchi | Jakob Homan |
-| [HADOOP-3315](https://issues.apache.org/jira/browse/HADOOP-3315) | New 
binary file format |  Major | io | Owen O'Malley | Hong Tang |
-| [HADOOP-6080](https://issues.apache.org/jira/browse/HADOOP-6080) | Handling 
of  Trash with quota |  Major | fs | Koji Noguchi | Jakob Homan |
-
-
-### IMPROVEMENTS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [MAPREDUCE-465](https://issues.apache.org/jira/browse/MAPREDUCE-465) | 
Deprecate org.apache.hadoop.mapred.lib.MultithreadedMapRunner |  Minor | . | 
Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HDFS-527](https://issues.apache.org/jira/browse/HDFS-527) | Refactor 
DFSClient constructors |  Major | hdfs-client | Tsz Wo Nicholas Sze | Tsz Wo 
Nicholas Sze |
-| [MAPREDUCE-767](https://issues.apache.org/jira/browse/MAPREDUCE-767) | to 
remove mapreduce dependency on commons-cli2 |  Major | contrib/streaming | 
Giridharan Kesavan | Amar Kamat |
-| [HDFS-635](https://issues.apache.org/jira/browse/HDFS-635) | HDFS Project 
page does not show 0.20.1 documentation/release information. |  Major | 
documentation | Andy Sautins |  |
-
-
-### BUG FIXES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-5210](https://issues.apache.org/jira/browse/HADOOP-5210) | Reduce 
Task Progress shows \> 100% when the total size of map outputs (for a single 
reducer) is high |  Minor | . | Jothi Padmanabhan | Ravi Gummadi |
-| [HADOOP-5654](https://issues.apache.org/jira/browse/HADOOP-5654) | 
TestReplicationPolicy.\<init\> fails on java.net.BindException |  Major | test 
| Hairong Kuang | Hairong Kuang |
-| [HADOOP-5655](https://issues.apache.org/jira/browse/HADOOP-5655) | 
TestMRServerPorts fails on java.net.BindException |  Major | . | Hairong Kuang 
| Devaraj Das |
-| [HADOOP-5533](https://issues.apache.org/jira/browse/HADOOP-5533) | Recovery 
duration shown on the jobtracker webpage is inaccurate |  Major | . | Amar 
Kamat | Amar Kamat |
-| [HADOOP-5646](https://issues.apache.org/jira/browse/HADOOP-5646) | 
TestQueueCapacities is failing Hudson tests for the last few builds |  Major | 
. | Jothi Padmanabhan | Vinod Kumar Vavilapalli |
-| [HADOOP-5691](https://issues.apache.org/jira/browse/HADOOP-5691) | 
org.apache.hadoop.mapreduce.Reducer should not be abstract. |  Major | . | 
Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [HADOOP-5688](https://issues.apache.org/jira/browse/HADOOP-5688) | 
HftpFileSystem.getChecksum(..) does not work for the paths with scheme and 
authority |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-4674](https://issues.apache.org/jira/browse/HADOOP-4674) | hadoop fs 
-help should list detailed help info for the following commands: test, text, 
tail, stat & touchz |  Trivial | fs | David NeSmith | Ravi Phulari |
-| [HADOOP-5711](https://issues.apache.org/jira/browse/HADOOP-5711) | Change 
Namenode file close log to info |  Minor | . | Tsz Wo Nicholas Sze | Tsz Wo 
Nicholas Sze |
-| [HADOOP-5213](https://issues.apache.org/jira/browse/HADOOP-5213) | 
BZip2CompressionOutputStream NullPointerException |  Blocker | io | Zheng Shao 
| Zheng Shao |
-| [HADOOP-5736](https://issues.apache.org/jira/browse/HADOOP-5736) | Update 
CapacityScheduler documentation to reflect latest changes |  Major | . | 
Sreekanth Ramakrishnan | Sreekanth Ramakrishnan |
-| [HADOOP-5718](https://issues.apache.org/jira/browse/HADOOP-5718) | Capacity 
Scheduler should not check for presence of default queue while starting up. |  
Major | . | Sreekanth Ramakrishnan | Sreekanth Ramakrishnan |
-| [HADOOP-5719](https://issues.apache.org/jira/browse/HADOOP-5719) | Jobs 
failed during job initalization are never removed from Capacity Schedulers 
waiting list |  Major | . | Sreekanth Ramakrishnan | Sreekanth Ramakrishnan |
-| [HADOOP-5349](https://issues.apache.org/jira/browse/HADOOP-5349) | When the 
size required for a path is -1, LocalDirAllocator.getLocalPathForWrite fails 
with a DiskCheckerException when the disk it selects is bad. |  Major | . | 
Vinod Kumar Vavilapalli | Vinod Kumar Vavilapalli |
-| [HADOOP-5636](https://issues.apache.org/jira/browse/HADOOP-5636) | Job is 
left in Running state after a killJob |  Critical | . | Amareshwari Sriramadasu 
| Amar Kamat |
-| [HADOOP-5641](https://issues.apache.org/jira/browse/HADOOP-5641) | Possible 
NPE in CapacityScheduler's MemoryMatcher |  Major | . | Vinod Kumar Vavilapalli 
| Hemanth Yamijala |
-| [HADOOP-5828](https://issues.apache.org/jira/browse/HADOOP-5828) | Use 
absolute path for JobTracker's mapred.local.dir in MiniMRCluster |  Major | 
test | Hemanth Yamijala | Hemanth Yamijala |
-| [HADOOP-5850](https://issues.apache.org/jira/browse/HADOOP-5850) | 
map/reduce doesn't run jobs with 0 maps |  Critical | . | Owen O'Malley | Vinod 
Kumar Vavilapalli |
-| [HADOOP-4626](https://issues.apache.org/jira/browse/HADOOP-4626) | API link 
in forrest doc should point to the same version of hadoop. |  Minor | 
documentation | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HADOOP-5883](https://issues.apache.org/jira/browse/HADOOP-5883) | 
TaskMemoryMonitorThread might shoot down tasks even if their processes 
momentarily exceed the requested memory |  Major | . | Hemanth Yamijala | 
Hemanth Yamijala |
-| [HADOOP-5539](https://issues.apache.org/jira/browse/HADOOP-5539) | 
o.a.h.mapred.Merger not maintaining map out compression on intermediate files | 
 Blocker | . | Billy Pearson | Jothi Padmanabhan |
-| [HADOOP-5932](https://issues.apache.org/jira/browse/HADOOP-5932) | 
MemoryMatcher logs 0 as freeMemOnTT even though there are free slots available 
on TaskTraker |  Major | . | Karam Singh | Vinod Kumar Vavilapalli |
-| [HADOOP-5951](https://issues.apache.org/jira/browse/HADOOP-5951) | 
StorageInfo needs Apache license header. |  Major | . | Suresh Srinivas | 
Suresh Srinivas |
-| [HADOOP-5648](https://issues.apache.org/jira/browse/HADOOP-5648) | Not able 
to generate gridmix.jar on already compiled version of hadoop |  Major | 
benchmarks | Suman Sehgal | Giridharan Kesavan |
-| [HADOOP-5908](https://issues.apache.org/jira/browse/HADOOP-5908) | 
ArithmeticException in heartbeats with zero map jobs |  Major | . | Vinod Kumar 
Vavilapalli | Amar Kamat |
-| [HADOOP-5924](https://issues.apache.org/jira/browse/HADOOP-5924) | JT fails 
to recover the jobs after restart after HADOOP:4372 |  Major | . | Ramya Sunil 
| Amar Kamat |
-| [HADOOP-5882](https://issues.apache.org/jira/browse/HADOOP-5882) | Progress 
is not updated when the New Reducer is running reduce phase |  Blocker | . | 
Jothi Padmanabhan | Amareshwari Sriramadasu |
-| [HADOOP-5746](https://issues.apache.org/jira/browse/HADOOP-5746) | Errors 
encountered in MROutputThread after the last map/reduce call can go undetected 
|  Major | . | Devaraj Das | Amar Kamat |
-| [HADOOP-5884](https://issues.apache.org/jira/browse/HADOOP-5884) | Capacity 
scheduler should account high memory jobs as using more capacity of the queue | 
 Major | . | Hemanth Yamijala | Vinod Kumar Vavilapalli |
-| [HADOOP-5937](https://issues.apache.org/jira/browse/HADOOP-5937) | Correct  
info message  "Use hadoop dfs -safemode option"  to  " Use hdfs dfsadmin 
-safemode option"  . |  Minor | . | Ravi Phulari | Ravi Phulari |
-| [HADOOP-5921](https://issues.apache.org/jira/browse/HADOOP-5921) | 
JobTracker does not come up because of NotReplicatedYetException |  Major | . | 
Amareshwari Sriramadasu | Amar Kamat |
-| [HADOOP-6017](https://issues.apache.org/jira/browse/HADOOP-6017) | NameNode 
and SecondaryNameNode fail to restart because of abnormal filenames. |  Blocker 
| . | Raghu Angadi | Tsz Wo Nicholas Sze |
-| [HADOOP-5920](https://issues.apache.org/jira/browse/HADOOP-5920) | 
TestJobHistory fails some times. |  Major | . | Amareshwari Sriramadasu | Amar 
Kamat |
-| [HDFS-26](https://issues.apache.org/jira/browse/HDFS-26) |    HADOOP-5862 
for version .20  (Namespace quota exceeded message unclear) |  Major | . | 
Boris Shkolnik | Boris Shkolnik |
-| [HDFS-438](https://issues.apache.org/jira/browse/HDFS-438) | Improve help 
message for quotas |  Minor | . | Raghu Angadi | Raghu Angadi |
-| [MAPREDUCE-2](https://issues.apache.org/jira/browse/MAPREDUCE-2) | 
ArrayOutOfIndex error in KeyFieldBasedPartitioner on empty key |  Major | . | 
Amar Kamat | Amar Kamat |
-| [MAPREDUCE-130](https://issues.apache.org/jira/browse/MAPREDUCE-130) | 
Delete the jobconf copy from the log directory of the JobTracker when the job 
is retired |  Major | . | Devaraj Das | Amar Kamat |
-| [MAPREDUCE-657](https://issues.apache.org/jira/browse/MAPREDUCE-657) | 
CompletedJobStatusStore hardcodes filesystem to hdfs |  Major | jobtracker | 
Amar Kamat | Amar Kamat |
-| [MAPREDUCE-179](https://issues.apache.org/jira/browse/MAPREDUCE-179) | 
setProgress not called for new RecordReaders |  Blocker | . | Chris Douglas | 
Chris Douglas |
-| [MAPREDUCE-124](https://issues.apache.org/jira/browse/MAPREDUCE-124) | When 
abortTask of OutputCommitter fails with an Exception for a map-only job, the 
task is marked as success |  Major | . | Jothi Padmanabhan | Amareshwari 
Sriramadasu |
-| [HADOOP-6139](https://issues.apache.org/jira/browse/HADOOP-6139) | 
Incomplete help message is displayed for rm and rmr options. |  Minor | . | 
Suman Sehgal | Jakob Homan |
-| [HADOOP-6141](https://issues.apache.org/jira/browse/HADOOP-6141) | hadoop 
0.20 branch "test-patch" is broken |  Major | build | Hong Tang | Hong Tang |
-| [HADOOP-6145](https://issues.apache.org/jira/browse/HADOOP-6145) | No error 
message for deleting non-existant file or directory. |  Major | fs | Suman 
Sehgal | Jakob Homan |
-| [MAPREDUCE-565](https://issues.apache.org/jira/browse/MAPREDUCE-565) | 
Partitioner does not work with new API |  Blocker | task | Jothi Padmanabhan | 
Owen O'Malley |
-| [MAPREDUCE-18](https://issues.apache.org/jira/browse/MAPREDUCE-18) | Under 
load the shuffle sometimes gets incorrect data |  Blocker | . | Owen O'Malley | 
Ravi Gummadi |
-| [MAPREDUCE-735](https://issues.apache.org/jira/browse/MAPREDUCE-735) | 
ArrayIndexOutOfBoundsException is thrown by KeyFieldBasedPartitioner |  Major | 
. | Suman Sehgal | Amar Kamat |
-| [MAPREDUCE-383](https://issues.apache.org/jira/browse/MAPREDUCE-383) | pipes 
combiner does not reset properly after a spill |  Major | . | Christian Kunz | 
Christian Kunz |
-| [MAPREDUCE-40](https://issues.apache.org/jira/browse/MAPREDUCE-40) | Memory 
management variables need a backwards compatibility option after HADOOP-5881 |  
Blocker | . | Hemanth Yamijala | rahul k singh |
-| [MAPREDUCE-796](https://issues.apache.org/jira/browse/MAPREDUCE-796) | 
Encountered "ClassCastException" on tasktracker while running wordcount with 
MultithreadedMapRunner |  Major | examples | Suman Sehgal | Amar Kamat |
-| [MAPREDUCE-838](https://issues.apache.org/jira/browse/MAPREDUCE-838) | Task 
succeeds even when committer.commitTask fails with IOException |  Blocker | 
task | Koji Noguchi | Amareshwari Sriramadasu |
-| [MAPREDUCE-805](https://issues.apache.org/jira/browse/MAPREDUCE-805) | 
Deadlock in Jobtracker |  Major | . | Michael Tamm | Amar Kamat |
-| [HDFS-167](https://issues.apache.org/jira/browse/HDFS-167) | DFSClient 
continues to retry indefinitely |  Minor | hdfs-client | Derek Wollenstein | 
Bill Zeller |
-| [MAPREDUCE-832](https://issues.apache.org/jira/browse/MAPREDUCE-832) | Too 
many WARN messages about deprecated memorty config variables in JobTacker log | 
 Major | . | Karam Singh | rahul k singh |
-| [MAPREDUCE-745](https://issues.apache.org/jira/browse/MAPREDUCE-745) | 
TestRecoveryManager fails sometimes |  Major | jobtracker | Amareshwari 
Sriramadasu | Amar Kamat |
-| [MAPREDUCE-834](https://issues.apache.org/jira/browse/MAPREDUCE-834) | When 
TaskTracker config use old memory management values its memory monitoring is 
diabled. |  Major | . | Karam Singh | Sreekanth Ramakrishnan |
-| [MAPREDUCE-818](https://issues.apache.org/jira/browse/MAPREDUCE-818) | 
org.apache.hadoop.mapreduce.Counters.getGroup returns null if the group name 
doesnt exist. |  Minor | . | Amareshwari Sriramadasu | Amareshwari Sriramadasu |
-| [MAPREDUCE-807](https://issues.apache.org/jira/browse/MAPREDUCE-807) | Stray 
user files in mapred.system.dir with permissions other than 777 can prevent the 
jobtracker from starting up. |  Blocker | jobtracker | Amar Kamat | Amar Kamat |
-| [MAPREDUCE-430](https://issues.apache.org/jira/browse/MAPREDUCE-430) | Task 
stuck in cleanup with OutOfMemoryErrors |  Major | . | Amareshwari Sriramadasu 
| Amar Kamat |
-| [HADOOP-6215](https://issues.apache.org/jira/browse/HADOOP-6215) | fix 
GenericOptionParser to deal with -D with '=' in the value |  Major | . | Owen 
O'Malley | Amar Kamat |
-| [MAPREDUCE-421](https://issues.apache.org/jira/browse/MAPREDUCE-421) | 
mapred pipes might return exit code 0 even when failing |  Major | pipes | 
Christian Kunz | Christian Kunz |
-| [HDFS-525](https://issues.apache.org/jira/browse/HDFS-525) | 
ListPathsServlet.java uses static SimpleDateFormat that has threading issues |  
Major | namenode | Suresh Srinivas | Suresh Srinivas |
-| [MAPREDUCE-911](https://issues.apache.org/jira/browse/MAPREDUCE-911) | 
TestTaskFail fail sometimes |  Major | test | Amareshwari Sriramadasu | 
Amareshwari Sriramadasu |
-| [MAPREDUCE-687](https://issues.apache.org/jira/browse/MAPREDUCE-687) | 
TestMiniMRMapRedDebugScript fails sometimes |  Major | test | Amar Kamat | 
Amareshwari Sriramadasu |
-| [MAPREDUCE-924](https://issues.apache.org/jira/browse/MAPREDUCE-924) | 
TestPipes must not directly invoke 'main' of pipes as an exit from main could 
cause the testcase to crash. |  Major | pipes | Amareshwari Sriramadasu | 
Amareshwari Sriramadasu |
-| [HDFS-1022](https://issues.apache.org/jira/browse/HDFS-1022) | Merge 
under-10-min tests specs into one file |  Major | test | Erik Steffl | Erik 
Steffl |
-
-
-### SUB-TASKS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-6213](https://issues.apache.org/jira/browse/HADOOP-6213) | Remove 
commons dependency on commons-cli2 |  Blocker | util | Amar Kamat | Amar Kamat |
-
-


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