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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 0.20.205.0 - 2011-10-06
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-630](https://issues.apache.org/jira/browse/HDFS-630) | In 
DFSOutputStream.nextBlockOutputStream(), the client can exclude specific 
datanodes when locating the next block. |  Major | hdfs-client, namenode | 
Ruyue Ma | Cosmin Lehene |
+| [HDFS-1554](https://issues.apache.org/jira/browse/HDFS-1554) | Append 0.20: 
New semantics for recoverLease |  Major | . | Hairong Kuang | Hairong Kuang |
+| [HDFS-2202](https://issues.apache.org/jira/browse/HDFS-2202) | Changes to 
balancer bandwidth should not require datanode restart. |  Major | balancer & 
mover, datanode | Eric Payne | Eric Payne |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-200](https://issues.apache.org/jira/browse/HDFS-200) | In HDFS, sync() 
not yet guarantees data available to the new readers |  Blocker | . | Tsz Wo 
Nicholas Sze | dhruba borthakur |
+| [HDFS-1520](https://issues.apache.org/jira/browse/HDFS-1520) | HDFS 20 
append: Lightweight NameNode operation to trigger lease recovery |  Major | 
namenode | Hairong Kuang | Hairong Kuang |
+| [HADOOP-7594](https://issues.apache.org/jira/browse/HADOOP-7594) | Support 
HTTP REST in HttpServer |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas 
Sze |
+| [HADOOP-7119](https://issues.apache.org/jira/browse/HADOOP-7119) | add 
Kerberos HTTP SPNEGO authentication support to Hadoop JT/NN/DN/TT web-consoles 
|  Major | security | Alejandro Abdelnur | Alejandro Abdelnur |
+| [HADOOP-6889](https://issues.apache.org/jira/browse/HADOOP-6889) | Make RPC 
to have an option to timeout |  Major | ipc | Hairong Kuang | John George |
+| [MAPREDUCE-2777](https://issues.apache.org/jira/browse/MAPREDUCE-2777) | 
Backport MAPREDUCE-220 to Hadoop 20 security branch |  Major | . | Jonathan 
Eagles | Amar Kamat |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-826](https://issues.apache.org/jira/browse/HDFS-826) | Allow a 
mechanism for an application to detect that datanode(s)  have died in the write 
pipeline |  Major | hdfs-client | dhruba borthakur | dhruba borthakur |
+| [HDFS-1054](https://issues.apache.org/jira/browse/HDFS-1054) | Remove 
unnecessary sleep after failure in nextBlockOutputStream |  Major | hdfs-client 
| Todd Lipcon | Todd Lipcon |
+| [HDFS-1210](https://issues.apache.org/jira/browse/HDFS-1210) | DFSClient 
should log exception when block recovery fails |  Trivial | hdfs-client | Todd 
Lipcon | Todd Lipcon |
+| [HDFS-1211](https://issues.apache.org/jira/browse/HDFS-1211) | 0.20 append: 
Block receiver should not log "rewind" packets at INFO level |  Minor | 
datanode | Todd Lipcon | Todd Lipcon |
+| [HDFS-895](https://issues.apache.org/jira/browse/HDFS-895) | Allow 
hflush/sync to occur in parallel with new writes to the file |  Major | 
hdfs-client | dhruba borthakur | Todd Lipcon |
+| [HDFS-1555](https://issues.apache.org/jira/browse/HDFS-1555) | HDFS 20 
append: Disallow pipeline recovery if a file is already being lease recovered | 
 Major | . | Hairong Kuang | Hairong Kuang |
+| [HADOOP-7343](https://issues.apache.org/jira/browse/HADOOP-7343) | backport 
HADOOP-7008 and HADOOP-7042 to branch-0.20-security |  Minor | test | Thomas 
Graves | Thomas Graves |
+| [HADOOP-7432](https://issues.apache.org/jira/browse/HADOOP-7432) | Back-port 
HADOOP-7110 to 0.20-security |  Major | . | Sherry Chen | Sherry Chen |
+| [HADOOP-7314](https://issues.apache.org/jira/browse/HADOOP-7314) | Add 
support for throwing UnknownHostException when a host doesn't resolve |  Major 
| . | Jeffrey Naisbitt | Jeffrey Naisbitt |
+| [MAPREDUCE-2494](https://issues.apache.org/jira/browse/MAPREDUCE-2494) | 
Make the distributed cache delete entires using LRU priority |  Major | 
distributed-cache | Robert Joseph Evans | Robert Joseph Evans |
+| [MAPREDUCE-2729](https://issues.apache.org/jira/browse/MAPREDUCE-2729) | 
Reducers are always counted having "pending tasks" even if they can't be 
scheduled yet because not enough of their mappers have completed |  Major | . | 
Sherry Chen | Sherry Chen |
+| [HADOOP-7472](https://issues.apache.org/jira/browse/HADOOP-7472) | RPC 
client should deal with the IP address changes |  Minor | ipc | Kihwal Lee | 
Kihwal Lee |
+| [MAPREDUCE-2981](https://issues.apache.org/jira/browse/MAPREDUCE-2981) | 
Backport trunk fairscheduler to 0.20-security branch |  Major | 
contrib/fair-share | Matei Zaharia | Matei Zaharia |
+| [HADOOP-7707](https://issues.apache.org/jira/browse/HADOOP-7707) | improve 
config generator to allow users to specify proxy user, turn append on or off, 
turn webhdfs on or off |  Major | conf | Arpit Gupta | Arpit Gupta |
+| [HADOOP-7720](https://issues.apache.org/jira/browse/HADOOP-7720) | improve 
the hadoop-setup-conf.sh to read in the hbase user and setup the configs |  
Major | conf | Arpit Gupta | Arpit Gupta |
+| [HADOOP-7655](https://issues.apache.org/jira/browse/HADOOP-7655) | provide a 
small validation script that smoke tests the installed cluster |  Major | . | 
Arpit Gupta | Arpit Gupta |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-606](https://issues.apache.org/jira/browse/HDFS-606) | 
ConcurrentModificationException in invalidateCorruptReplicas() |  Major | 
namenode | Konstantin Shvachko | Konstantin Shvachko |
+| [HDFS-724](https://issues.apache.org/jira/browse/HDFS-724) | Pipeline close 
hangs if one of the datanode is not responsive. |  Blocker | datanode, 
hdfs-client | Tsz Wo Nicholas Sze | Hairong Kuang |
+| [HADOOP-6722](https://issues.apache.org/jira/browse/HADOOP-6722) | 
NetUtils.connect should check that it hasn't connected a socket to itself |  
Major | util | Todd Lipcon | Todd Lipcon |
+| [HDFS-142](https://issues.apache.org/jira/browse/HDFS-142) | In 0.20, move 
blocks being written into a blocksBeingWritten directory |  Blocker | . | Raghu 
Angadi | dhruba borthakur |
+| [HDFS-1141](https://issues.apache.org/jira/browse/HDFS-1141) | completeFile 
does not check lease ownership |  Blocker | namenode | Todd Lipcon | Todd 
Lipcon |
+| [HDFS-1207](https://issues.apache.org/jira/browse/HDFS-1207) | 0.20-append: 
stallReplicationWork should be volatile |  Major | namenode | Todd Lipcon | 
Todd Lipcon |
+| [HDFS-1204](https://issues.apache.org/jira/browse/HDFS-1204) | 0.20: Lease 
expiration should recover single files, not entire lease holder |  Major | . | 
Todd Lipcon | sam rash |
+| [HDFS-1118](https://issues.apache.org/jira/browse/HDFS-1118) | 
DFSOutputStream socket leak when cannot connect to DataNode |  Major | . | 
Zheng Shao | Zheng Shao |
+| [HDFS-1202](https://issues.apache.org/jira/browse/HDFS-1202) | 
DataBlockScanner throws NPE when updated before initialized |  Major | datanode 
| Todd Lipcon | Todd Lipcon |
+| [HADOOP-6833](https://issues.apache.org/jira/browse/HADOOP-6833) | IPC leaks 
call parameters when exceptions thrown |  Blocker | . | Todd Lipcon | Todd 
Lipcon |
+| [HDFS-1346](https://issues.apache.org/jira/browse/HDFS-1346) | DFSClient 
receives out of order packet ack |  Major | datanode, hdfs-client | Hairong 
Kuang | Hairong Kuang |
+| [HDFS-1164](https://issues.apache.org/jira/browse/HDFS-1164) | TestHdfsProxy 
is failing |  Major | contrib/hdfsproxy | Eli Collins | Todd Lipcon |
+| [HDFS-988](https://issues.apache.org/jira/browse/HDFS-988) | saveNamespace 
race can corrupt the edits log |  Blocker | namenode | dhruba borthakur | Eli 
Collins |
+| [HDFS-1836](https://issues.apache.org/jira/browse/HDFS-1836) | Thousand of 
CLOSE\_WAIT socket |  Major | hdfs-client | Dennis Cheung | Bharath Mundlapudi |
+| [HADOOP-7400](https://issues.apache.org/jira/browse/HADOOP-7400) | 
HdfsProxyTests fails when the -Dtest.build.dir and -Dbuild.test is set |  Major 
| build | Giridharan Kesavan | Giridharan Kesavan |
+| [MAPREDUCE-2650](https://issues.apache.org/jira/browse/MAPREDUCE-2650) | 
back-port MAPREDUCE-2238 to 0.20-security |  Major | . | Sherry Chen | Sherry 
Chen |
+| [MAPREDUCE-2324](https://issues.apache.org/jira/browse/MAPREDUCE-2324) | Job 
should fail if a reduce task can't be scheduled anywhere |  Major | . | Todd 
Lipcon | Robert Joseph Evans |
+| [MAPREDUCE-2187](https://issues.apache.org/jira/browse/MAPREDUCE-2187) | map 
tasks timeout during sorting |  Major | . | Gianmarco De Francisci Morales | 
Anupam Seth |
+| [HDFS-2053](https://issues.apache.org/jira/browse/HDFS-2053) | Bug in 
INodeDirectory#computeContentSummary warning |  Minor | namenode | Michael Noll 
| Michael Noll |
+| [HDFS-2117](https://issues.apache.org/jira/browse/HDFS-2117) | 
DiskChecker#mkdirsWithExistsAndPermissionCheck may return true even when the 
dir is not created |  Minor | datanode | Eli Collins | Eli Collins |
+| [MAPREDUCE-2705](https://issues.apache.org/jira/browse/MAPREDUCE-2705) | 
tasks localized and launched serially by TaskLauncher - causing other tasks to 
be delayed |  Major | tasktracker | Thomas Graves | Thomas Graves |
+| [HDFS-2190](https://issues.apache.org/jira/browse/HDFS-2190) | NN fails to 
start if it encounters an empty or malformed fstime file |  Major | namenode | 
Aaron T. Myers | Aaron T. Myers |
+| [MAPREDUCE-2489](https://issues.apache.org/jira/browse/MAPREDUCE-2489) | 
Jobsplits with random hostnames can make the queue unusable |  Major | 
jobtracker | Jeffrey Naisbitt | Jeffrey Naisbitt |
+| [HDFS-2259](https://issues.apache.org/jira/browse/HDFS-2259) | DN web-UI 
doesn't work with paths that contain html |  Minor | datanode | Eli Collins | 
Eli Collins |
+| [MAPREDUCE-2852](https://issues.apache.org/jira/browse/MAPREDUCE-2852) | 
Jira for YDH bug 2854624 |  Major | tasktracker | Eli Collins | Kihwal Lee |
+| [HADOOP-7539](https://issues.apache.org/jira/browse/HADOOP-7539) | merge 
hadoop archive goodness from trunk to .20 |  Major | . | John George | John 
George |
+| [HADOOP-7596](https://issues.apache.org/jira/browse/HADOOP-7596) | Enable 
jsvc to work with Hadoop RPM package |  Major | build | Eric Yang | Eric Yang |
+| [HDFS-2309](https://issues.apache.org/jira/browse/HDFS-2309) | 
TestRenameWhileOpen fails in branch-0.20-security |  Major | . | Jitendra Nath 
Pandey | Jitendra Nath Pandey |
+| [HDFS-2320](https://issues.apache.org/jira/browse/HDFS-2320) | Make merged 
protocol changes from 0.20-append to 0.20-security compatible with previous 
releases. |  Major | datanode, hdfs-client, namenode | Suresh Srinivas | Suresh 
Srinivas |
+| [MAPREDUCE-2610](https://issues.apache.org/jira/browse/MAPREDUCE-2610) | 
Inconsistent API JobClient.getQueueAclsForCurrentUser |  Major | client | Joep 
Rottinghuis | Joep Rottinghuis |
+| [MAPREDUCE-2915](https://issues.apache.org/jira/browse/MAPREDUCE-2915) | 
LinuxTaskController does not work when JniBasedUnixGroupsNetgroupMapping or 
JniBasedUnixGroupsMapping is enabled |  Major | task-controller | Kihwal Lee | 
Kihwal Lee |
+| [HADOOP-7610](https://issues.apache.org/jira/browse/HADOOP-7610) | 
/etc/profile.d does not exist on Debian |  Major | scripts | Eric Yang | Eric 
Yang |
+| [HADOOP-7599](https://issues.apache.org/jira/browse/HADOOP-7599) | Improve 
hadoop setup conf script to setup secure Hadoop cluster |  Major | scripts | 
Eric Yang | Eric Yang |
+| [HADOOP-7626](https://issues.apache.org/jira/browse/HADOOP-7626) | Allow 
overwrite of HADOOP\_CLASSPATH and HADOOP\_OPTS |  Major | scripts | Eric Yang 
| Eric Yang |
+| [MAPREDUCE-2549](https://issues.apache.org/jira/browse/MAPREDUCE-2549) | 
Potential resource leaks in HadoopServer.java, RunOnHadoopWizard.java and 
Environment.java |  Major | contrib/eclipse-plugin, contrib/streaming | Devaraj 
K | Devaraj K |
+| [HDFS-2328](https://issues.apache.org/jira/browse/HDFS-2328) | hftp throws 
NPE if security is not enabled on remote cluster |  Critical | . | Daryn Sharp 
| Owen O'Malley |
+| [HDFS-1779](https://issues.apache.org/jira/browse/HDFS-1779) | After 
NameNode restart , Clients can not read partial files even after client invokes 
Sync. |  Major | datanode, namenode | Uma Maheswara Rao G | Uma Maheswara Rao G 
|
+| [HDFS-2331](https://issues.apache.org/jira/browse/HDFS-2331) | Hdfs 
compilation fails |  Major | hdfs-client | Abhijit Suresh Shingate | Abhijit 
Suresh Shingate |
+| [HDFS-2333](https://issues.apache.org/jira/browse/HDFS-2333) | HDFS-2284 
introduced 2 findbugs warnings on trunk |  Major | . | Ivan Kelly | Tsz Wo 
Nicholas Sze |
+| [HADOOP-7625](https://issues.apache.org/jira/browse/HADOOP-7625) | 
TestDelegationToken is failing in 205 |  Major | . | Owen O'Malley | Owen 
O'Malley |
+| [HADOOP-7637](https://issues.apache.org/jira/browse/HADOOP-7637) | Fair 
scheduler configuration file is not bundled in RPM |  Major | build | Eric Yang 
| Eric Yang |
+| [HADOOP-7631](https://issues.apache.org/jira/browse/HADOOP-7631) | In 
mapred-site.xml, stream.tmpdir is mapped to ${mapred.temp.dir} which is 
undeclared. |  Major | conf | Ramya Sunil | Eric Yang |
+| [HADOOP-7630](https://issues.apache.org/jira/browse/HADOOP-7630) | 
hadoop-metrics2.properties should have a property \*.period set to a default 
value foe metrics |  Major | conf | Arpit Gupta | Eric Yang |
+| [HADOOP-7633](https://issues.apache.org/jira/browse/HADOOP-7633) | 
log4j.properties should be added to the hadoop conf on deploy |  Major | conf | 
Arpit Gupta | Eric Yang |
+| [HADOOP-7644](https://issues.apache.org/jira/browse/HADOOP-7644) | Fix the 
delegation token tests to use the new style renewers |  Blocker | security | 
Owen O'Malley | Owen O'Malley |
+| [MAPREDUCE-3076](https://issues.apache.org/jira/browse/MAPREDUCE-3076) | 
TestSleepJob fails |  Blocker | test | Arun C Murthy | Arun C Murthy |
+| [HADOOP-7645](https://issues.apache.org/jira/browse/HADOOP-7645) | HTTP auth 
tests requiring Kerberos infrastructure are not disabled on 
branch-0.20-security |  Blocker | security | Aaron T. Myers | Jitendra Nath 
Pandey |
+| [HADOOP-7674](https://issues.apache.org/jira/browse/HADOOP-7674) | 
TestKerberosName fails in 20 branch. |  Major | . | Jitendra Nath Pandey | 
Jitendra Nath Pandey |
+| [HDFS-2342](https://issues.apache.org/jira/browse/HDFS-2342) | TestSleepJob 
and TestHdfsProxy broken after HDFS-2284 |  Blocker | build | Kihwal Lee | Tsz 
Wo Nicholas Sze |
+| [HDFS-2325](https://issues.apache.org/jira/browse/HDFS-2325) | Fuse-DFS 
fails to build on Hadoop 20.203.0 |  Blocker | fuse-dfs, libhdfs | Charles Earl 
| Kihwal Lee |
+| [HADOOP-7679](https://issues.apache.org/jira/browse/HADOOP-7679) | 
log4j.properties templates does not define mapred.jobsummary.logger |  Major | 
conf | Ramya Sunil | Ramya Sunil |
+| [HDFS-2359](https://issues.apache.org/jira/browse/HDFS-2359) | NPE found in 
Datanode log while Disk failed during different HDFS operation |  Major | 
datanode | Rajit Saha | Jonathan Eagles |
+| [HDFS-2375](https://issues.apache.org/jira/browse/HDFS-2375) | 
TestFileAppend4 fails in 0.20.205 branch |  Blocker | hdfs-client | Suresh 
Srinivas | Suresh Srinivas |
+| [MAPREDUCE-3081](https://issues.apache.org/jira/browse/MAPREDUCE-3081) | 
Change the name format for hadoop core and vaidya jar to be 
hadoop-{core/vaidya}-{version}.jar in vaidya.sh |  Major | contrib/vaidya | 
vitthal (Suhas) Gogate |  |
+| [HDFS-2373](https://issues.apache.org/jira/browse/HDFS-2373) | Commands 
using webhdfs and hftp print unnecessary debug information on the console with 
security enabled |  Major | webhdfs | Arpit Gupta | Arpit Gupta |
+| [HDFS-2368](https://issues.apache.org/jira/browse/HDFS-2368) | defaults 
created for web keytab and principal, these properties should not have defaults 
|  Major | . | Arpit Gupta | Tsz Wo Nicholas Sze |
+| [HDFS-2361](https://issues.apache.org/jira/browse/HDFS-2361) | hftp is 
broken |  Critical | namenode | Rajit Saha | Jitendra Nath Pandey |
+| [HADOOP-7683](https://issues.apache.org/jira/browse/HADOOP-7683) | 
hdfs-site.xml template has properties that are not used in 20 |  Minor | . | 
Arpit Gupta | Arpit Gupta |
+| [HDFS-1260](https://issues.apache.org/jira/browse/HDFS-1260) | 0.20: Block 
lost when multiple DNs trying to recover it to different genstamps |  Critical 
| . | Todd Lipcon | Todd Lipcon |
+| [HDFS-1186](https://issues.apache.org/jira/browse/HDFS-1186) | 0.20: DNs 
should interrupt writers at start of recovery |  Blocker | datanode | Todd 
Lipcon | Todd Lipcon |
+| [HDFS-1218](https://issues.apache.org/jira/browse/HDFS-1218) | 20 append: 
Blocks recovered on startup should be treated with lower priority during block 
synchronization |  Critical | datanode | Todd Lipcon | Todd Lipcon |
+| [HADOOP-7691](https://issues.apache.org/jira/browse/HADOOP-7691) | hadoop 
deb pkg should take a diff group id |  Major | . | Giridharan Kesavan | Eric 
Yang |
+| [HADOOP-7603](https://issues.apache.org/jira/browse/HADOOP-7603) | Set 
default hdfs, mapred uid, and hadoop group gid for RPM packages |  Major | . | 
Eric Yang | Eric Yang |
+| [HADOOP-7658](https://issues.apache.org/jira/browse/HADOOP-7658) | to fix 
hadoop config template |  Major | . | Giridharan Kesavan | Eric Yang |
+| [HADOOP-7684](https://issues.apache.org/jira/browse/HADOOP-7684) | 
jobhistory server and secondarynamenode should have init.d script |  Major | 
scripts | Eric Yang | Eric Yang |
+| [MAPREDUCE-3112](https://issues.apache.org/jira/browse/MAPREDUCE-3112) | 
Calling hadoop cli inside mapreduce job leads to errors |  Major | 
contrib/streaming | Eric Yang | Eric Yang |
+| [HADOOP-7715](https://issues.apache.org/jira/browse/HADOOP-7715) | see log4j 
Error when running mr jobs and certain dfs calls |  Major | conf | Arpit Gupta 
| Eric Yang |
+| [HADOOP-7711](https://issues.apache.org/jira/browse/HADOOP-7711) | 
hadoop-env.sh generated from templates has duplicate info |  Major | conf | 
Arpit Gupta | Arpit Gupta |
+| [HADOOP-7681](https://issues.apache.org/jira/browse/HADOOP-7681) | 
log4j.properties is missing properties for security audit and hdfs audit should 
be changed to info |  Minor | conf | Arpit Gupta | Arpit Gupta |
+| [HADOOP-7708](https://issues.apache.org/jira/browse/HADOOP-7708) | config 
generator does not update the properties file if on exists already |  Critical 
| conf | Arpit Gupta | Eric Yang |
+| [HDFS-2358](https://issues.apache.org/jira/browse/HDFS-2358) | NPE when the 
default filesystem's uri has no authority |  Major | namenode | Rajit Saha | 
Daryn Sharp |
+| [HDFS-2392](https://issues.apache.org/jira/browse/HDFS-2392) | Dist with 
hftp is failing again |  Critical | namenode | Rajit Saha | Daryn Sharp |
+| [HDFS-2408](https://issues.apache.org/jira/browse/HDFS-2408) | 
DFSClient#getNumCurrentReplicas is package private in 205 but public in 
branch-0.20-append |  Blocker | hdfs-client | stack | stack |
+| [HADOOP-7721](https://issues.apache.org/jira/browse/HADOOP-7721) | 
dfs.web.authentication.kerberos.principal expects the full hostname and does 
not replace \_HOST with the hostname |  Major | . | Arpit Gupta | Jitendra Nath 
Pandey |
+| [HDFS-2405](https://issues.apache.org/jira/browse/HDFS-2405) | hadoop dfs 
command with webhdfs fails on secure hadoop |  Critical | webhdfs | Arpit Gupta 
| Jitendra Nath Pandey |
+| [HADOOP-7724](https://issues.apache.org/jira/browse/HADOOP-7724) | 
hadoop-setup-conf.sh should put proxy user info into the core-site.xml |  Major 
| . | Giridharan Kesavan | Arpit Gupta |
+| [MAPREDUCE-2764](https://issues.apache.org/jira/browse/MAPREDUCE-2764) | Fix 
renewal of dfs delegation tokens |  Major | . | Daryn Sharp | Owen O'Malley |
+| [HADOOP-7602](https://issues.apache.org/jira/browse/HADOOP-7602) | 
wordcount, sort etc on har files fails with NPE |  Major | . | John George | 
John George |
+| [HADOOP-7649](https://issues.apache.org/jira/browse/HADOOP-7649) | 
TestMapredGroupMappingServiceRefresh and TestRefreshUserMappings  fail after 
HADOOP-7625 |  Blocker | security, test | Kihwal Lee | Jitendra Nath Pandey |
+| [HDFS-2411](https://issues.apache.org/jira/browse/HDFS-2411) | with webhdfs 
enabled in secure mode the auth to local mappings are not being respected. |  
Major | webhdfs | Arpit Gupta | Jitendra Nath Pandey |
+| [HDFS-1197](https://issues.apache.org/jira/browse/HDFS-1197) | Blocks are 
considered "complete" prematurely after commitBlockSynchronization or DN 
restart |  Major | datanode, hdfs-client, namenode | Todd Lipcon | Todd Lipcon |
+| [HADOOP-7615](https://issues.apache.org/jira/browse/HADOOP-7615) | Binary 
layout does not put share/hadoop/contrib/\*.jar into the class path |  Major | 
scripts | Eric Yang | Eric Yang |
+| [HDFS-2300](https://issues.apache.org/jira/browse/HDFS-2300) | 
TestFileAppend4 and TestMultiThreadedSync fail on 20.append and 20-security. |  
Major | . | Jitendra Nath Pandey | Jitendra Nath Pandey |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-1242](https://issues.apache.org/jira/browse/HDFS-1242) | 0.20 append: 
Add test for appendFile() race solved in HDFS-142 |  Major | . | Todd Lipcon | 
Todd Lipcon |
+| [HDFS-1252](https://issues.apache.org/jira/browse/HDFS-1252) | 
TestDFSConcurrentFileOperations broken in 0.20-appendj |  Major | test | Todd 
Lipcon | Todd Lipcon |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-561](https://issues.apache.org/jira/browse/HDFS-561) | Fix write 
pipeline READ\_TIMEOUT |  Major | datanode, hdfs-client | Kan Zhang | Kan Zhang 
|
+| [HDFS-1057](https://issues.apache.org/jira/browse/HDFS-1057) | Concurrent 
readers hit ChecksumExceptions if following a writer to very end of file |  
Blocker | datanode | Todd Lipcon | sam rash |
+| [HDFS-2284](https://issues.apache.org/jira/browse/HDFS-2284) | Write Http 
access to HDFS |  Major | . | Sanjay Radia | Tsz Wo Nicholas Sze |
+| [HDFS-2317](https://issues.apache.org/jira/browse/HDFS-2317) | Read access 
to HDFS using HTTP REST |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas 
Sze |
+| [HDFS-2338](https://issues.apache.org/jira/browse/HDFS-2338) | Configuration 
option to enable/disable webhdfs. |  Major | webhdfs | Jitendra Nath Pandey | 
Jitendra Nath Pandey |
+| [HDFS-2318](https://issues.apache.org/jira/browse/HDFS-2318) | Provide 
authentication to webhdfs using SPNEGO |  Major | webhdfs | Tsz Wo Nicholas Sze 
| Tsz Wo Nicholas Sze |
+| [HDFS-2340](https://issues.apache.org/jira/browse/HDFS-2340) | Support 
getFileBlockLocations and getDelegationToken in webhdfs |  Major | webhdfs | 
Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [MAPREDUCE-2928](https://issues.apache.org/jira/browse/MAPREDUCE-2928) | 
MR-2413 improvements |  Major | tasktracker | Eli Collins | Eli Collins |
+| [HDFS-2356](https://issues.apache.org/jira/browse/HDFS-2356) | webhdfs: 
support case insensitive query parameter names |  Major | webhdfs | Tsz Wo 
Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HDFS-2366](https://issues.apache.org/jira/browse/HDFS-2366) | webhdfs 
throws a npe when ugi is null from getDelegationToken |  Major | webhdfs | 
Arpit Gupta | Tsz Wo Nicholas Sze |
+| [HDFS-2348](https://issues.apache.org/jira/browse/HDFS-2348) | Support 
getContentSummary and getFileChecksum in webhdfs |  Major | webhdfs | Tsz Wo 
Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HDFS-2395](https://issues.apache.org/jira/browse/HDFS-2395) | webhdfs api's 
should return a root element in the json response |  Critical | webhdfs | Arpit 
Gupta | Tsz Wo Nicholas Sze |
+| [HDFS-2403](https://issues.apache.org/jira/browse/HDFS-2403) | The renewer 
in NamenodeWebHdfsMethods.generateDelegationToken(..) is not used |  Major | . 
| Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [HDFS-2404](https://issues.apache.org/jira/browse/HDFS-2404) | webhdfs 
liststatus json response is not correct |  Major | webhdfs | Arpit Gupta | 
Suresh Srinivas |
+| [HDFS-2385](https://issues.apache.org/jira/browse/HDFS-2385) | Support 
delegation token renewal in webhdfs |  Major | webhdfs | Tsz Wo Nicholas Sze | 
Tsz Wo Nicholas Sze |
+| [MAPREDUCE-2780](https://issues.apache.org/jira/browse/MAPREDUCE-2780) | 
Standardize the value of token service |  Major | . | Daryn Sharp | Daryn Sharp 
|
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-1795](https://issues.apache.org/jira/browse/HDFS-1795) | Port 
0.20-append changes onto 0.20-security-203 |  Major | . | Andrew Purtell |  |
+
+

http://git-wip-us.apache.org/repos/asf/hadoop/blob/4b8c2b1c/hadoop-common-project/hadoop-common/src/site/markdown/release/0.20.205.0/CHANGES.0.20.205.0.md
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@@ -1,191 +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 0.20.205.0 - 2011-10-06
-
-### INCOMPATIBLE CHANGES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-630](https://issues.apache.org/jira/browse/HDFS-630) | In 
DFSOutputStream.nextBlockOutputStream(), the client can exclude specific 
datanodes when locating the next block. |  Major | hdfs-client, namenode | 
Ruyue Ma | Cosmin Lehene |
-| [HDFS-1554](https://issues.apache.org/jira/browse/HDFS-1554) | Append 0.20: 
New semantics for recoverLease |  Major | . | Hairong Kuang | Hairong Kuang |
-| [HDFS-2202](https://issues.apache.org/jira/browse/HDFS-2202) | Changes to 
balancer bandwidth should not require datanode restart. |  Major | balancer & 
mover, datanode | Eric Payne | Eric Payne |
-
-
-### NEW FEATURES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-200](https://issues.apache.org/jira/browse/HDFS-200) | In HDFS, sync() 
not yet guarantees data available to the new readers |  Blocker | . | Tsz Wo 
Nicholas Sze | dhruba borthakur |
-| [HDFS-1520](https://issues.apache.org/jira/browse/HDFS-1520) | HDFS 20 
append: Lightweight NameNode operation to trigger lease recovery |  Major | 
namenode | Hairong Kuang | Hairong Kuang |
-| [HADOOP-7594](https://issues.apache.org/jira/browse/HADOOP-7594) | Support 
HTTP REST in HttpServer |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas 
Sze |
-| [HADOOP-7119](https://issues.apache.org/jira/browse/HADOOP-7119) | add 
Kerberos HTTP SPNEGO authentication support to Hadoop JT/NN/DN/TT web-consoles 
|  Major | security | Alejandro Abdelnur | Alejandro Abdelnur |
-| [HADOOP-6889](https://issues.apache.org/jira/browse/HADOOP-6889) | Make RPC 
to have an option to timeout |  Major | ipc | Hairong Kuang | John George |
-| [MAPREDUCE-2777](https://issues.apache.org/jira/browse/MAPREDUCE-2777) | 
Backport MAPREDUCE-220 to Hadoop 20 security branch |  Major | . | Jonathan 
Eagles | Amar Kamat |
-
-
-### IMPROVEMENTS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-826](https://issues.apache.org/jira/browse/HDFS-826) | Allow a 
mechanism for an application to detect that datanode(s)  have died in the write 
pipeline |  Major | hdfs-client | dhruba borthakur | dhruba borthakur |
-| [HDFS-1054](https://issues.apache.org/jira/browse/HDFS-1054) | Remove 
unnecessary sleep after failure in nextBlockOutputStream |  Major | hdfs-client 
| Todd Lipcon | Todd Lipcon |
-| [HDFS-1210](https://issues.apache.org/jira/browse/HDFS-1210) | DFSClient 
should log exception when block recovery fails |  Trivial | hdfs-client | Todd 
Lipcon | Todd Lipcon |
-| [HDFS-1211](https://issues.apache.org/jira/browse/HDFS-1211) | 0.20 append: 
Block receiver should not log "rewind" packets at INFO level |  Minor | 
datanode | Todd Lipcon | Todd Lipcon |
-| [HDFS-895](https://issues.apache.org/jira/browse/HDFS-895) | Allow 
hflush/sync to occur in parallel with new writes to the file |  Major | 
hdfs-client | dhruba borthakur | Todd Lipcon |
-| [HDFS-1555](https://issues.apache.org/jira/browse/HDFS-1555) | HDFS 20 
append: Disallow pipeline recovery if a file is already being lease recovered | 
 Major | . | Hairong Kuang | Hairong Kuang |
-| [HADOOP-7343](https://issues.apache.org/jira/browse/HADOOP-7343) | backport 
HADOOP-7008 and HADOOP-7042 to branch-0.20-security |  Minor | test | Thomas 
Graves | Thomas Graves |
-| [HADOOP-7432](https://issues.apache.org/jira/browse/HADOOP-7432) | Back-port 
HADOOP-7110 to 0.20-security |  Major | . | Sherry Chen | Sherry Chen |
-| [HADOOP-7314](https://issues.apache.org/jira/browse/HADOOP-7314) | Add 
support for throwing UnknownHostException when a host doesn't resolve |  Major 
| . | Jeffrey Naisbitt | Jeffrey Naisbitt |
-| [MAPREDUCE-2494](https://issues.apache.org/jira/browse/MAPREDUCE-2494) | 
Make the distributed cache delete entires using LRU priority |  Major | 
distributed-cache | Robert Joseph Evans | Robert Joseph Evans |
-| [MAPREDUCE-2729](https://issues.apache.org/jira/browse/MAPREDUCE-2729) | 
Reducers are always counted having "pending tasks" even if they can't be 
scheduled yet because not enough of their mappers have completed |  Major | . | 
Sherry Chen | Sherry Chen |
-| [HADOOP-7472](https://issues.apache.org/jira/browse/HADOOP-7472) | RPC 
client should deal with the IP address changes |  Minor | ipc | Kihwal Lee | 
Kihwal Lee |
-| [MAPREDUCE-2981](https://issues.apache.org/jira/browse/MAPREDUCE-2981) | 
Backport trunk fairscheduler to 0.20-security branch |  Major | 
contrib/fair-share | Matei Zaharia | Matei Zaharia |
-| [HADOOP-7707](https://issues.apache.org/jira/browse/HADOOP-7707) | improve 
config generator to allow users to specify proxy user, turn append on or off, 
turn webhdfs on or off |  Major | conf | Arpit Gupta | Arpit Gupta |
-| [HADOOP-7720](https://issues.apache.org/jira/browse/HADOOP-7720) | improve 
the hadoop-setup-conf.sh to read in the hbase user and setup the configs |  
Major | conf | Arpit Gupta | Arpit Gupta |
-| [HADOOP-7655](https://issues.apache.org/jira/browse/HADOOP-7655) | provide a 
small validation script that smoke tests the installed cluster |  Major | . | 
Arpit Gupta | Arpit Gupta |
-
-
-### BUG FIXES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-606](https://issues.apache.org/jira/browse/HDFS-606) | 
ConcurrentModificationException in invalidateCorruptReplicas() |  Major | 
namenode | Konstantin Shvachko | Konstantin Shvachko |
-| [HDFS-724](https://issues.apache.org/jira/browse/HDFS-724) | Pipeline close 
hangs if one of the datanode is not responsive. |  Blocker | datanode, 
hdfs-client | Tsz Wo Nicholas Sze | Hairong Kuang |
-| [HADOOP-6722](https://issues.apache.org/jira/browse/HADOOP-6722) | 
NetUtils.connect should check that it hasn't connected a socket to itself |  
Major | util | Todd Lipcon | Todd Lipcon |
-| [HDFS-142](https://issues.apache.org/jira/browse/HDFS-142) | In 0.20, move 
blocks being written into a blocksBeingWritten directory |  Blocker | . | Raghu 
Angadi | dhruba borthakur |
-| [HDFS-1141](https://issues.apache.org/jira/browse/HDFS-1141) | completeFile 
does not check lease ownership |  Blocker | namenode | Todd Lipcon | Todd 
Lipcon |
-| [HDFS-1207](https://issues.apache.org/jira/browse/HDFS-1207) | 0.20-append: 
stallReplicationWork should be volatile |  Major | namenode | Todd Lipcon | 
Todd Lipcon |
-| [HDFS-1204](https://issues.apache.org/jira/browse/HDFS-1204) | 0.20: Lease 
expiration should recover single files, not entire lease holder |  Major | . | 
Todd Lipcon | sam rash |
-| [HDFS-1118](https://issues.apache.org/jira/browse/HDFS-1118) | 
DFSOutputStream socket leak when cannot connect to DataNode |  Major | . | 
Zheng Shao | Zheng Shao |
-| [HDFS-1202](https://issues.apache.org/jira/browse/HDFS-1202) | 
DataBlockScanner throws NPE when updated before initialized |  Major | datanode 
| Todd Lipcon | Todd Lipcon |
-| [HADOOP-6833](https://issues.apache.org/jira/browse/HADOOP-6833) | IPC leaks 
call parameters when exceptions thrown |  Blocker | . | Todd Lipcon | Todd 
Lipcon |
-| [HDFS-1346](https://issues.apache.org/jira/browse/HDFS-1346) | DFSClient 
receives out of order packet ack |  Major | datanode, hdfs-client | Hairong 
Kuang | Hairong Kuang |
-| [HDFS-1164](https://issues.apache.org/jira/browse/HDFS-1164) | TestHdfsProxy 
is failing |  Major | contrib/hdfsproxy | Eli Collins | Todd Lipcon |
-| [HDFS-988](https://issues.apache.org/jira/browse/HDFS-988) | saveNamespace 
race can corrupt the edits log |  Blocker | namenode | dhruba borthakur | Eli 
Collins |
-| [HDFS-1836](https://issues.apache.org/jira/browse/HDFS-1836) | Thousand of 
CLOSE\_WAIT socket |  Major | hdfs-client | Dennis Cheung | Bharath Mundlapudi |
-| [HADOOP-7400](https://issues.apache.org/jira/browse/HADOOP-7400) | 
HdfsProxyTests fails when the -Dtest.build.dir and -Dbuild.test is set |  Major 
| build | Giridharan Kesavan | Giridharan Kesavan |
-| [MAPREDUCE-2650](https://issues.apache.org/jira/browse/MAPREDUCE-2650) | 
back-port MAPREDUCE-2238 to 0.20-security |  Major | . | Sherry Chen | Sherry 
Chen |
-| [MAPREDUCE-2324](https://issues.apache.org/jira/browse/MAPREDUCE-2324) | Job 
should fail if a reduce task can't be scheduled anywhere |  Major | . | Todd 
Lipcon | Robert Joseph Evans |
-| [MAPREDUCE-2187](https://issues.apache.org/jira/browse/MAPREDUCE-2187) | map 
tasks timeout during sorting |  Major | . | Gianmarco De Francisci Morales | 
Anupam Seth |
-| [HDFS-2053](https://issues.apache.org/jira/browse/HDFS-2053) | Bug in 
INodeDirectory#computeContentSummary warning |  Minor | namenode | Michael Noll 
| Michael Noll |
-| [HDFS-2117](https://issues.apache.org/jira/browse/HDFS-2117) | 
DiskChecker#mkdirsWithExistsAndPermissionCheck may return true even when the 
dir is not created |  Minor | datanode | Eli Collins | Eli Collins |
-| [MAPREDUCE-2705](https://issues.apache.org/jira/browse/MAPREDUCE-2705) | 
tasks localized and launched serially by TaskLauncher - causing other tasks to 
be delayed |  Major | tasktracker | Thomas Graves | Thomas Graves |
-| [HDFS-2190](https://issues.apache.org/jira/browse/HDFS-2190) | NN fails to 
start if it encounters an empty or malformed fstime file |  Major | namenode | 
Aaron T. Myers | Aaron T. Myers |
-| [MAPREDUCE-2489](https://issues.apache.org/jira/browse/MAPREDUCE-2489) | 
Jobsplits with random hostnames can make the queue unusable |  Major | 
jobtracker | Jeffrey Naisbitt | Jeffrey Naisbitt |
-| [HDFS-2259](https://issues.apache.org/jira/browse/HDFS-2259) | DN web-UI 
doesn't work with paths that contain html |  Minor | datanode | Eli Collins | 
Eli Collins |
-| [MAPREDUCE-2852](https://issues.apache.org/jira/browse/MAPREDUCE-2852) | 
Jira for YDH bug 2854624 |  Major | tasktracker | Eli Collins | Kihwal Lee |
-| [HADOOP-7539](https://issues.apache.org/jira/browse/HADOOP-7539) | merge 
hadoop archive goodness from trunk to .20 |  Major | . | John George | John 
George |
-| [HADOOP-7596](https://issues.apache.org/jira/browse/HADOOP-7596) | Enable 
jsvc to work with Hadoop RPM package |  Major | build | Eric Yang | Eric Yang |
-| [HDFS-2309](https://issues.apache.org/jira/browse/HDFS-2309) | 
TestRenameWhileOpen fails in branch-0.20-security |  Major | . | Jitendra Nath 
Pandey | Jitendra Nath Pandey |
-| [HDFS-2320](https://issues.apache.org/jira/browse/HDFS-2320) | Make merged 
protocol changes from 0.20-append to 0.20-security compatible with previous 
releases. |  Major | datanode, hdfs-client, namenode | Suresh Srinivas | Suresh 
Srinivas |
-| [MAPREDUCE-2610](https://issues.apache.org/jira/browse/MAPREDUCE-2610) | 
Inconsistent API JobClient.getQueueAclsForCurrentUser |  Major | client | Joep 
Rottinghuis | Joep Rottinghuis |
-| [MAPREDUCE-2915](https://issues.apache.org/jira/browse/MAPREDUCE-2915) | 
LinuxTaskController does not work when JniBasedUnixGroupsNetgroupMapping or 
JniBasedUnixGroupsMapping is enabled |  Major | task-controller | Kihwal Lee | 
Kihwal Lee |
-| [HADOOP-7610](https://issues.apache.org/jira/browse/HADOOP-7610) | 
/etc/profile.d does not exist on Debian |  Major | scripts | Eric Yang | Eric 
Yang |
-| [HADOOP-7599](https://issues.apache.org/jira/browse/HADOOP-7599) | Improve 
hadoop setup conf script to setup secure Hadoop cluster |  Major | scripts | 
Eric Yang | Eric Yang |
-| [HADOOP-7626](https://issues.apache.org/jira/browse/HADOOP-7626) | Allow 
overwrite of HADOOP\_CLASSPATH and HADOOP\_OPTS |  Major | scripts | Eric Yang 
| Eric Yang |
-| [MAPREDUCE-2549](https://issues.apache.org/jira/browse/MAPREDUCE-2549) | 
Potential resource leaks in HadoopServer.java, RunOnHadoopWizard.java and 
Environment.java |  Major | contrib/eclipse-plugin, contrib/streaming | Devaraj 
K | Devaraj K |
-| [HDFS-2328](https://issues.apache.org/jira/browse/HDFS-2328) | hftp throws 
NPE if security is not enabled on remote cluster |  Critical | . | Daryn Sharp 
| Owen O'Malley |
-| [HDFS-1779](https://issues.apache.org/jira/browse/HDFS-1779) | After 
NameNode restart , Clients can not read partial files even after client invokes 
Sync. |  Major | datanode, namenode | Uma Maheswara Rao G | Uma Maheswara Rao G 
|
-| [HDFS-2331](https://issues.apache.org/jira/browse/HDFS-2331) | Hdfs 
compilation fails |  Major | hdfs-client | Abhijit Suresh Shingate | Abhijit 
Suresh Shingate |
-| [HDFS-2333](https://issues.apache.org/jira/browse/HDFS-2333) | HDFS-2284 
introduced 2 findbugs warnings on trunk |  Major | . | Ivan Kelly | Tsz Wo 
Nicholas Sze |
-| [HADOOP-7625](https://issues.apache.org/jira/browse/HADOOP-7625) | 
TestDelegationToken is failing in 205 |  Major | . | Owen O'Malley | Owen 
O'Malley |
-| [HADOOP-7637](https://issues.apache.org/jira/browse/HADOOP-7637) | Fair 
scheduler configuration file is not bundled in RPM |  Major | build | Eric Yang 
| Eric Yang |
-| [HADOOP-7631](https://issues.apache.org/jira/browse/HADOOP-7631) | In 
mapred-site.xml, stream.tmpdir is mapped to ${mapred.temp.dir} which is 
undeclared. |  Major | conf | Ramya Sunil | Eric Yang |
-| [HADOOP-7630](https://issues.apache.org/jira/browse/HADOOP-7630) | 
hadoop-metrics2.properties should have a property \*.period set to a default 
value foe metrics |  Major | conf | Arpit Gupta | Eric Yang |
-| [HADOOP-7633](https://issues.apache.org/jira/browse/HADOOP-7633) | 
log4j.properties should be added to the hadoop conf on deploy |  Major | conf | 
Arpit Gupta | Eric Yang |
-| [HADOOP-7644](https://issues.apache.org/jira/browse/HADOOP-7644) | Fix the 
delegation token tests to use the new style renewers |  Blocker | security | 
Owen O'Malley | Owen O'Malley |
-| [MAPREDUCE-3076](https://issues.apache.org/jira/browse/MAPREDUCE-3076) | 
TestSleepJob fails |  Blocker | test | Arun C Murthy | Arun C Murthy |
-| [HADOOP-7645](https://issues.apache.org/jira/browse/HADOOP-7645) | HTTP auth 
tests requiring Kerberos infrastructure are not disabled on 
branch-0.20-security |  Blocker | security | Aaron T. Myers | Jitendra Nath 
Pandey |
-| [HADOOP-7674](https://issues.apache.org/jira/browse/HADOOP-7674) | 
TestKerberosName fails in 20 branch. |  Major | . | Jitendra Nath Pandey | 
Jitendra Nath Pandey |
-| [HDFS-2342](https://issues.apache.org/jira/browse/HDFS-2342) | TestSleepJob 
and TestHdfsProxy broken after HDFS-2284 |  Blocker | build | Kihwal Lee | Tsz 
Wo Nicholas Sze |
-| [HDFS-2325](https://issues.apache.org/jira/browse/HDFS-2325) | Fuse-DFS 
fails to build on Hadoop 20.203.0 |  Blocker | fuse-dfs, libhdfs | Charles Earl 
| Kihwal Lee |
-| [HADOOP-7679](https://issues.apache.org/jira/browse/HADOOP-7679) | 
log4j.properties templates does not define mapred.jobsummary.logger |  Major | 
conf | Ramya Sunil | Ramya Sunil |
-| [HDFS-2359](https://issues.apache.org/jira/browse/HDFS-2359) | NPE found in 
Datanode log while Disk failed during different HDFS operation |  Major | 
datanode | Rajit Saha | Jonathan Eagles |
-| [HDFS-2375](https://issues.apache.org/jira/browse/HDFS-2375) | 
TestFileAppend4 fails in 0.20.205 branch |  Blocker | hdfs-client | Suresh 
Srinivas | Suresh Srinivas |
-| [MAPREDUCE-3081](https://issues.apache.org/jira/browse/MAPREDUCE-3081) | 
Change the name format for hadoop core and vaidya jar to be 
hadoop-{core/vaidya}-{version}.jar in vaidya.sh |  Major | contrib/vaidya | 
vitthal (Suhas) Gogate |  |
-| [HDFS-2373](https://issues.apache.org/jira/browse/HDFS-2373) | Commands 
using webhdfs and hftp print unnecessary debug information on the console with 
security enabled |  Major | webhdfs | Arpit Gupta | Arpit Gupta |
-| [HDFS-2368](https://issues.apache.org/jira/browse/HDFS-2368) | defaults 
created for web keytab and principal, these properties should not have defaults 
|  Major | . | Arpit Gupta | Tsz Wo Nicholas Sze |
-| [HDFS-2361](https://issues.apache.org/jira/browse/HDFS-2361) | hftp is 
broken |  Critical | namenode | Rajit Saha | Jitendra Nath Pandey |
-| [HADOOP-7683](https://issues.apache.org/jira/browse/HADOOP-7683) | 
hdfs-site.xml template has properties that are not used in 20 |  Minor | . | 
Arpit Gupta | Arpit Gupta |
-| [HDFS-1260](https://issues.apache.org/jira/browse/HDFS-1260) | 0.20: Block 
lost when multiple DNs trying to recover it to different genstamps |  Critical 
| . | Todd Lipcon | Todd Lipcon |
-| [HDFS-1186](https://issues.apache.org/jira/browse/HDFS-1186) | 0.20: DNs 
should interrupt writers at start of recovery |  Blocker | datanode | Todd 
Lipcon | Todd Lipcon |
-| [HDFS-1218](https://issues.apache.org/jira/browse/HDFS-1218) | 20 append: 
Blocks recovered on startup should be treated with lower priority during block 
synchronization |  Critical | datanode | Todd Lipcon | Todd Lipcon |
-| [HADOOP-7691](https://issues.apache.org/jira/browse/HADOOP-7691) | hadoop 
deb pkg should take a diff group id |  Major | . | Giridharan Kesavan | Eric 
Yang |
-| [HADOOP-7603](https://issues.apache.org/jira/browse/HADOOP-7603) | Set 
default hdfs, mapred uid, and hadoop group gid for RPM packages |  Major | . | 
Eric Yang | Eric Yang |
-| [HADOOP-7658](https://issues.apache.org/jira/browse/HADOOP-7658) | to fix 
hadoop config template |  Major | . | Giridharan Kesavan | Eric Yang |
-| [HADOOP-7684](https://issues.apache.org/jira/browse/HADOOP-7684) | 
jobhistory server and secondarynamenode should have init.d script |  Major | 
scripts | Eric Yang | Eric Yang |
-| [MAPREDUCE-3112](https://issues.apache.org/jira/browse/MAPREDUCE-3112) | 
Calling hadoop cli inside mapreduce job leads to errors |  Major | 
contrib/streaming | Eric Yang | Eric Yang |
-| [HADOOP-7715](https://issues.apache.org/jira/browse/HADOOP-7715) | see log4j 
Error when running mr jobs and certain dfs calls |  Major | conf | Arpit Gupta 
| Eric Yang |
-| [HADOOP-7711](https://issues.apache.org/jira/browse/HADOOP-7711) | 
hadoop-env.sh generated from templates has duplicate info |  Major | conf | 
Arpit Gupta | Arpit Gupta |
-| [HADOOP-7681](https://issues.apache.org/jira/browse/HADOOP-7681) | 
log4j.properties is missing properties for security audit and hdfs audit should 
be changed to info |  Minor | conf | Arpit Gupta | Arpit Gupta |
-| [HADOOP-7708](https://issues.apache.org/jira/browse/HADOOP-7708) | config 
generator does not update the properties file if on exists already |  Critical 
| conf | Arpit Gupta | Eric Yang |
-| [HDFS-2358](https://issues.apache.org/jira/browse/HDFS-2358) | NPE when the 
default filesystem's uri has no authority |  Major | namenode | Rajit Saha | 
Daryn Sharp |
-| [HDFS-2392](https://issues.apache.org/jira/browse/HDFS-2392) | Dist with 
hftp is failing again |  Critical | namenode | Rajit Saha | Daryn Sharp |
-| [HDFS-2408](https://issues.apache.org/jira/browse/HDFS-2408) | 
DFSClient#getNumCurrentReplicas is package private in 205 but public in 
branch-0.20-append |  Blocker | hdfs-client | stack | stack |
-| [HADOOP-7721](https://issues.apache.org/jira/browse/HADOOP-7721) | 
dfs.web.authentication.kerberos.principal expects the full hostname and does 
not replace \_HOST with the hostname |  Major | . | Arpit Gupta | Jitendra Nath 
Pandey |
-| [HDFS-2405](https://issues.apache.org/jira/browse/HDFS-2405) | hadoop dfs 
command with webhdfs fails on secure hadoop |  Critical | webhdfs | Arpit Gupta 
| Jitendra Nath Pandey |
-| [HADOOP-7724](https://issues.apache.org/jira/browse/HADOOP-7724) | 
hadoop-setup-conf.sh should put proxy user info into the core-site.xml |  Major 
| . | Giridharan Kesavan | Arpit Gupta |
-| [MAPREDUCE-2764](https://issues.apache.org/jira/browse/MAPREDUCE-2764) | Fix 
renewal of dfs delegation tokens |  Major | . | Daryn Sharp | Owen O'Malley |
-| [HADOOP-7602](https://issues.apache.org/jira/browse/HADOOP-7602) | 
wordcount, sort etc on har files fails with NPE |  Major | . | John George | 
John George |
-| [HADOOP-7649](https://issues.apache.org/jira/browse/HADOOP-7649) | 
TestMapredGroupMappingServiceRefresh and TestRefreshUserMappings  fail after 
HADOOP-7625 |  Blocker | security, test | Kihwal Lee | Jitendra Nath Pandey |
-| [HDFS-2411](https://issues.apache.org/jira/browse/HDFS-2411) | with webhdfs 
enabled in secure mode the auth to local mappings are not being respected. |  
Major | webhdfs | Arpit Gupta | Jitendra Nath Pandey |
-| [HDFS-1197](https://issues.apache.org/jira/browse/HDFS-1197) | Blocks are 
considered "complete" prematurely after commitBlockSynchronization or DN 
restart |  Major | datanode, hdfs-client, namenode | Todd Lipcon | Todd Lipcon |
-| [HADOOP-7615](https://issues.apache.org/jira/browse/HADOOP-7615) | Binary 
layout does not put share/hadoop/contrib/\*.jar into the class path |  Major | 
scripts | Eric Yang | Eric Yang |
-| [HDFS-2300](https://issues.apache.org/jira/browse/HDFS-2300) | 
TestFileAppend4 and TestMultiThreadedSync fail on 20.append and 20-security. |  
Major | . | Jitendra Nath Pandey | Jitendra Nath Pandey |
-
-
-### TESTS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-1242](https://issues.apache.org/jira/browse/HDFS-1242) | 0.20 append: 
Add test for appendFile() race solved in HDFS-142 |  Major | . | Todd Lipcon | 
Todd Lipcon |
-| [HDFS-1252](https://issues.apache.org/jira/browse/HDFS-1252) | 
TestDFSConcurrentFileOperations broken in 0.20-appendj |  Major | test | Todd 
Lipcon | Todd Lipcon |
-
-
-### SUB-TASKS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-561](https://issues.apache.org/jira/browse/HDFS-561) | Fix write 
pipeline READ\_TIMEOUT |  Major | datanode, hdfs-client | Kan Zhang | Kan Zhang 
|
-| [HDFS-1057](https://issues.apache.org/jira/browse/HDFS-1057) | Concurrent 
readers hit ChecksumExceptions if following a writer to very end of file |  
Blocker | datanode | Todd Lipcon | sam rash |
-| [HDFS-2284](https://issues.apache.org/jira/browse/HDFS-2284) | Write Http 
access to HDFS |  Major | . | Sanjay Radia | Tsz Wo Nicholas Sze |
-| [HDFS-2317](https://issues.apache.org/jira/browse/HDFS-2317) | Read access 
to HDFS using HTTP REST |  Major | . | Tsz Wo Nicholas Sze | Tsz Wo Nicholas 
Sze |
-| [HDFS-2338](https://issues.apache.org/jira/browse/HDFS-2338) | Configuration 
option to enable/disable webhdfs. |  Major | webhdfs | Jitendra Nath Pandey | 
Jitendra Nath Pandey |
-| [HDFS-2318](https://issues.apache.org/jira/browse/HDFS-2318) | Provide 
authentication to webhdfs using SPNEGO |  Major | webhdfs | Tsz Wo Nicholas Sze 
| Tsz Wo Nicholas Sze |
-| [HDFS-2340](https://issues.apache.org/jira/browse/HDFS-2340) | Support 
getFileBlockLocations and getDelegationToken in webhdfs |  Major | webhdfs | 
Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [MAPREDUCE-2928](https://issues.apache.org/jira/browse/MAPREDUCE-2928) | 
MR-2413 improvements |  Major | tasktracker | Eli Collins | Eli Collins |
-| [HDFS-2356](https://issues.apache.org/jira/browse/HDFS-2356) | webhdfs: 
support case insensitive query parameter names |  Major | webhdfs | Tsz Wo 
Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HDFS-2366](https://issues.apache.org/jira/browse/HDFS-2366) | webhdfs 
throws a npe when ugi is null from getDelegationToken |  Major | webhdfs | 
Arpit Gupta | Tsz Wo Nicholas Sze |
-| [HDFS-2348](https://issues.apache.org/jira/browse/HDFS-2348) | Support 
getContentSummary and getFileChecksum in webhdfs |  Major | webhdfs | Tsz Wo 
Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HDFS-2395](https://issues.apache.org/jira/browse/HDFS-2395) | webhdfs api's 
should return a root element in the json response |  Critical | webhdfs | Arpit 
Gupta | Tsz Wo Nicholas Sze |
-| [HDFS-2403](https://issues.apache.org/jira/browse/HDFS-2403) | The renewer 
in NamenodeWebHdfsMethods.generateDelegationToken(..) is not used |  Major | . 
| Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [HDFS-2404](https://issues.apache.org/jira/browse/HDFS-2404) | webhdfs 
liststatus json response is not correct |  Major | webhdfs | Arpit Gupta | 
Suresh Srinivas |
-| [HDFS-2385](https://issues.apache.org/jira/browse/HDFS-2385) | Support 
delegation token renewal in webhdfs |  Major | webhdfs | Tsz Wo Nicholas Sze | 
Tsz Wo Nicholas Sze |
-| [MAPREDUCE-2780](https://issues.apache.org/jira/browse/MAPREDUCE-2780) | 
Standardize the value of token service |  Major | . | Daryn Sharp | Daryn Sharp 
|
-
-
-### OTHER:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-1795](https://issues.apache.org/jira/browse/HDFS-1795) | Port 
0.20-append changes onto 0.20-security-203 |  Major | . | Andrew Purtell |  |
-
-

http://git-wip-us.apache.org/repos/asf/hadoop/blob/4b8c2b1c/hadoop-common-project/hadoop-common/src/site/markdown/release/0.20.3/CHANGELOG.0.20.3.md
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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 0.20.3 - Unreleased (as of 2018-09-01)
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-6382](https://issues.apache.org/jira/browse/HADOOP-6382) | publish 
hadoop jars to apache mvn repo. |  Major | build | Giridharan Kesavan | 
Giridharan Kesavan |
+| [HDFS-132](https://issues.apache.org/jira/browse/HDFS-132) | Namenode in 
Safemode reports to Simon non-zero number of deleted files during startup |  
Minor | namenode | Hairong Kuang | Suresh Srinivas |
+| [HADOOP-6701](https://issues.apache.org/jira/browse/HADOOP-6701) |  
Incorrect exit codes for "dfs -chown", "dfs -chgrp" |  Minor | fs | Ravi 
Phulari | Ravi Phulari |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [MAPREDUCE-1832](https://issues.apache.org/jira/browse/MAPREDUCE-1832) | 
Support for file sizes less than 1MB in DFSIO benchmark. |  Major | benchmarks 
| Konstantin Shvachko | Konstantin Shvachko |
+| [HADOOP-7240](https://issues.apache.org/jira/browse/HADOOP-7240) | Update 
eclipse .classpath template |  Major | . | Aaron T. Myers | Aaron T. Myers |
+| [MAPREDUCE-1734](https://issues.apache.org/jira/browse/MAPREDUCE-1734) | 
Un-deprecate the old MapReduce API in the 0.20 branch |  Blocker | 
documentation | Tom White | Todd Lipcon |
+| [HDFS-1013](https://issues.apache.org/jira/browse/HDFS-1013) | Miscellaneous 
improvements to HTML markup for web UIs |  Minor | . | Todd Lipcon | Eugene 
Koontz |
+| [HADOOP-6882](https://issues.apache.org/jira/browse/HADOOP-6882) | Update 
the patch level of Jetty |  Major | . | Owen O'Malley | Owen O'Malley |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-15](https://issues.apache.org/jira/browse/HDFS-15) | Rack replication 
policy can be violated for over replicated blocks |  Critical | . | Hairong 
Kuang | Jitendra Nath Pandey |
+| [MAPREDUCE-1522](https://issues.apache.org/jira/browse/MAPREDUCE-1522) | 
FileInputFormat may change the file system of an input path |  Blocker | . | 
Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+| [MAPREDUCE-1407](https://issues.apache.org/jira/browse/MAPREDUCE-1407) | 
Invalid example in the documentation of 
org.apache.hadoop.mapreduce.{Mapper,Reducer} |  Trivial | documentation | 
Benoit Sigoure | Benoit Sigoure |
+| [HDFS-955](https://issues.apache.org/jira/browse/HDFS-955) | 
FSImage.saveFSImage can lose edits |  Blocker | namenode | Todd Lipcon | 
Konstantin Shvachko |
+| [HDFS-1041](https://issues.apache.org/jira/browse/HDFS-1041) | DFSClient 
does not retry in getFileChecksum(..) |  Major | hdfs-client | Tsz Wo Nicholas 
Sze | Tsz Wo Nicholas Sze |
+| [HDFS-909](https://issues.apache.org/jira/browse/HDFS-909) | Race condition 
between rollEditLog or rollFSImage ant FSEditsLog.write operations  corrupts 
edits log |  Blocker | namenode | Cosmin Lehene | Todd Lipcon |
+| [HADOOP-6702](https://issues.apache.org/jira/browse/HADOOP-6702) | Incorrect 
exit codes for "dfs -chown", "dfs -chgrp"  when input is given in wildcard 
format. |  Minor | fs | Ravi Phulari | Ravi Phulari |
+| [HADOOP-6760](https://issues.apache.org/jira/browse/HADOOP-6760) | WebServer 
shouldn't increase port number in case of negative port setting caused by 
Jetty's race |  Major | . | Konstantin Boudnik | Konstantin Boudnik |
+| [MAPREDUCE-1372](https://issues.apache.org/jira/browse/MAPREDUCE-1372) | 
ConcurrentModificationException in JobInProgress |  Blocker | jobtracker | 
Amareshwari Sriramadasu | Dick King |
+| [MAPREDUCE-118](https://issues.apache.org/jira/browse/MAPREDUCE-118) | 
Job.getJobID() will always return null |  Blocker | client | Amar Kamat | 
Amareshwari Sriramadasu |
+| [MAPREDUCE-1880](https://issues.apache.org/jira/browse/MAPREDUCE-1880) | 
"java.lang.ArithmeticException: Non-terminating decimal expansion; no exact 
representable decimal result." while running "hadoop jar 
hadoop-0.20.1+169.89-examples.jar pi 4 30" |  Minor | examples | Victor 
Pakhomov | Tsz Wo Nicholas Sze |
+| [HDFS-1258](https://issues.apache.org/jira/browse/HDFS-1258) | Clearing 
namespace quota on "/" corrupts FS image |  Blocker | namenode | Aaron T. Myers 
| Aaron T. Myers |
+| [HADOOP-6881](https://issues.apache.org/jira/browse/HADOOP-6881) | The 
efficient comparators aren't always used except for BytesWritable and Text |  
Major | . | Owen O'Malley | Owen O'Malley |
+| [HADOOP-6833](https://issues.apache.org/jira/browse/HADOOP-6833) | IPC leaks 
call parameters when exceptions thrown |  Blocker | . | Todd Lipcon | Todd 
Lipcon |
+| [HADOOP-6928](https://issues.apache.org/jira/browse/HADOOP-6928) | Fix 
BooleanWritable comparator in 0.20 |  Major | io | Owen O'Malley | Johannes 
Zillmann |
+| [HDFS-1404](https://issues.apache.org/jira/browse/HDFS-1404) | TestNodeCount 
logic incorrect in branch-0.20 |  Minor | namenode, test | Todd Lipcon | Todd 
Lipcon |
+| [MAPREDUCE-1280](https://issues.apache.org/jira/browse/MAPREDUCE-1280) | 
Eclipse Plugin does not work with Eclipse Ganymede (3.4) |  Major | . | Aaron 
Kimball | Alex Kozlov |
+| [HADOOP-6724](https://issues.apache.org/jira/browse/HADOOP-6724) | IPC 
doesn't properly handle IOEs thrown by socket factory |  Major | ipc | Todd 
Lipcon | Todd Lipcon |
+| [HDFS-1240](https://issues.apache.org/jira/browse/HDFS-1240) | TestDFSShell 
failing in branch-20 |  Critical | test | Todd Lipcon | Todd Lipcon |
+| [HDFS-727](https://issues.apache.org/jira/browse/HDFS-727) | bug setting 
block size hdfsOpenFile |  Blocker | libhdfs | Eli Collins | Eli Collins |
+| [HDFS-908](https://issues.apache.org/jira/browse/HDFS-908) | 
TestDistributedFileSystem fails with Wrong FS on weird hosts |  Minor | test | 
Todd Lipcon | Todd Lipcon |
+| [HDFS-1377](https://issues.apache.org/jira/browse/HDFS-1377) | Quota bug for 
partial blocks allows quotas to be violated |  Blocker | namenode | Eli Collins 
| Eli Collins |
+| [HDFS-1406](https://issues.apache.org/jira/browse/HDFS-1406) | TestCLI fails 
on Ubuntu with default /etc/hosts |  Minor | . | Todd Lipcon | Konstantin 
Boudnik |
+| [MAPREDUCE-2262](https://issues.apache.org/jira/browse/MAPREDUCE-2262) | 
Capacity Scheduler unit tests fail with class not found |  Major | 
capacity-sched | Owen O'Malley | Owen O'Malley |
+| [HADOOP-6923](https://issues.apache.org/jira/browse/HADOOP-6923) | Native 
Libraries do not load if a different platform signature is returned from 
org.apache.hadoop.util.PlatformName |  Major | native | Stephen Watt | Stephen 
Watt |
+| [HDFS-1543](https://issues.apache.org/jira/browse/HDFS-1543) | Reduce dev. 
cycle time by moving system testing artifacts from default build and push to 
maven for HDFS |  Major | . | Arun C Murthy | Luke Lu |
+| [HDFS-1836](https://issues.apache.org/jira/browse/HDFS-1836) | Thousand of 
CLOSE\_WAIT socket |  Major | hdfs-client | Dennis Cheung | Bharath Mundlapudi |
+| [HADOOP-7116](https://issues.apache.org/jira/browse/HADOOP-7116) | raise 
contrib junit test jvm memory size to 512mb |  Major | test | Owen O'Malley | 
Owen O'Malley |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-6637](https://issues.apache.org/jira/browse/HADOOP-6637) | Benchmark 
overhead of RPC session establishment |  Major | benchmarks | Konstantin 
Shvachko | Konstantin Shvachko |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-1286](https://issues.apache.org/jira/browse/HDFS-1286) | Dry entropy 
pool on Hudson boxes causing test timeouts |  Major | test | Todd Lipcon | 
Konstantin Boudnik |
+| [HADOOP-7372](https://issues.apache.org/jira/browse/HADOOP-7372) | Remove 
ref of 20.3 release from branch-0.20 CHANGES.txt |  Major | documentation | Eli 
Collins | Eli Collins |
+
+

http://git-wip-us.apache.org/repos/asf/hadoop/blob/4b8c2b1c/hadoop-common-project/hadoop-common/src/site/markdown/release/0.20.3/CHANGES.0.20.3.md
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@@ -1,91 +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 0.20.3 - Unreleased (as of 2017-08-28)
-
-### INCOMPATIBLE CHANGES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-6382](https://issues.apache.org/jira/browse/HADOOP-6382) | publish 
hadoop jars to apache mvn repo. |  Major | build | Giridharan Kesavan | 
Giridharan Kesavan |
-| [HDFS-132](https://issues.apache.org/jira/browse/HDFS-132) | Namenode in 
Safemode reports to Simon non-zero number of deleted files during startup |  
Minor | namenode | Hairong Kuang | Suresh Srinivas |
-| [HADOOP-6701](https://issues.apache.org/jira/browse/HADOOP-6701) |  
Incorrect exit codes for "dfs -chown", "dfs -chgrp" |  Minor | fs | Ravi 
Phulari | Ravi Phulari |
-
-
-### IMPROVEMENTS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [MAPREDUCE-1832](https://issues.apache.org/jira/browse/MAPREDUCE-1832) | 
Support for file sizes less than 1MB in DFSIO benchmark. |  Major | benchmarks 
| Konstantin Shvachko | Konstantin Shvachko |
-| [HADOOP-7240](https://issues.apache.org/jira/browse/HADOOP-7240) | Update 
eclipse .classpath template |  Major | . | Aaron T. Myers | Aaron T. Myers |
-| [MAPREDUCE-1734](https://issues.apache.org/jira/browse/MAPREDUCE-1734) | 
Un-deprecate the old MapReduce API in the 0.20 branch |  Blocker | 
documentation | Tom White | Todd Lipcon |
-| [HDFS-1013](https://issues.apache.org/jira/browse/HDFS-1013) | Miscellaneous 
improvements to HTML markup for web UIs |  Minor | . | Todd Lipcon | Eugene 
Koontz |
-| [HADOOP-6882](https://issues.apache.org/jira/browse/HADOOP-6882) | Update 
the patch level of Jetty |  Major | . | Owen O'Malley | Owen O'Malley |
-
-
-### BUG FIXES:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-15](https://issues.apache.org/jira/browse/HDFS-15) | Rack replication 
policy can be violated for over replicated blocks |  Critical | . | Hairong 
Kuang | Jitendra Nath Pandey |
-| [MAPREDUCE-1522](https://issues.apache.org/jira/browse/MAPREDUCE-1522) | 
FileInputFormat may change the file system of an input path |  Blocker | . | 
Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
-| [MAPREDUCE-1407](https://issues.apache.org/jira/browse/MAPREDUCE-1407) | 
Invalid example in the documentation of 
org.apache.hadoop.mapreduce.{Mapper,Reducer} |  Trivial | documentation | 
Benoit Sigoure | Benoit Sigoure |
-| [HDFS-955](https://issues.apache.org/jira/browse/HDFS-955) | 
FSImage.saveFSImage can lose edits |  Blocker | namenode | Todd Lipcon | 
Konstantin Shvachko |
-| [HDFS-1041](https://issues.apache.org/jira/browse/HDFS-1041) | DFSClient 
does not retry in getFileChecksum(..) |  Major | hdfs-client | Tsz Wo Nicholas 
Sze | Tsz Wo Nicholas Sze |
-| [HDFS-909](https://issues.apache.org/jira/browse/HDFS-909) | Race condition 
between rollEditLog or rollFSImage ant FSEditsLog.write operations  corrupts 
edits log |  Blocker | namenode | Cosmin Lehene | Todd Lipcon |
-| [HADOOP-6702](https://issues.apache.org/jira/browse/HADOOP-6702) | Incorrect 
exit codes for "dfs -chown", "dfs -chgrp"  when input is given in wildcard 
format. |  Minor | fs | Ravi Phulari | Ravi Phulari |
-| [HADOOP-6760](https://issues.apache.org/jira/browse/HADOOP-6760) | WebServer 
shouldn't increase port number in case of negative port setting caused by 
Jetty's race |  Major | . | Konstantin Boudnik | Konstantin Boudnik |
-| [MAPREDUCE-1372](https://issues.apache.org/jira/browse/MAPREDUCE-1372) | 
ConcurrentModificationException in JobInProgress |  Blocker | jobtracker | 
Amareshwari Sriramadasu | Dick King |
-| [MAPREDUCE-118](https://issues.apache.org/jira/browse/MAPREDUCE-118) | 
Job.getJobID() will always return null |  Blocker | client | Amar Kamat | 
Amareshwari Sriramadasu |
-| [MAPREDUCE-1880](https://issues.apache.org/jira/browse/MAPREDUCE-1880) | 
"java.lang.ArithmeticException: Non-terminating decimal expansion; no exact 
representable decimal result." while running "hadoop jar 
hadoop-0.20.1+169.89-examples.jar pi 4 30" |  Minor | examples | Victor 
Pakhomov | Tsz Wo Nicholas Sze |
-| [HDFS-1258](https://issues.apache.org/jira/browse/HDFS-1258) | Clearing 
namespace quota on "/" corrupts FS image |  Blocker | namenode | Aaron T. Myers 
| Aaron T. Myers |
-| [HADOOP-6881](https://issues.apache.org/jira/browse/HADOOP-6881) | The 
efficient comparators aren't always used except for BytesWritable and Text |  
Major | . | Owen O'Malley | Owen O'Malley |
-| [HADOOP-6833](https://issues.apache.org/jira/browse/HADOOP-6833) | IPC leaks 
call parameters when exceptions thrown |  Blocker | . | Todd Lipcon | Todd 
Lipcon |
-| [HADOOP-6928](https://issues.apache.org/jira/browse/HADOOP-6928) | Fix 
BooleanWritable comparator in 0.20 |  Major | io | Owen O'Malley | Johannes 
Zillmann |
-| [HDFS-1404](https://issues.apache.org/jira/browse/HDFS-1404) | TestNodeCount 
logic incorrect in branch-0.20 |  Minor | namenode, test | Todd Lipcon | Todd 
Lipcon |
-| [MAPREDUCE-1280](https://issues.apache.org/jira/browse/MAPREDUCE-1280) | 
Eclipse Plugin does not work with Eclipse Ganymede (3.4) |  Major | . | Aaron 
Kimball | Alex Kozlov |
-| [HADOOP-6724](https://issues.apache.org/jira/browse/HADOOP-6724) | IPC 
doesn't properly handle IOEs thrown by socket factory |  Major | ipc | Todd 
Lipcon | Todd Lipcon |
-| [HDFS-1240](https://issues.apache.org/jira/browse/HDFS-1240) | TestDFSShell 
failing in branch-20 |  Critical | test | Todd Lipcon | Todd Lipcon |
-| [HDFS-727](https://issues.apache.org/jira/browse/HDFS-727) | bug setting 
block size hdfsOpenFile |  Blocker | libhdfs | Eli Collins | Eli Collins |
-| [HDFS-908](https://issues.apache.org/jira/browse/HDFS-908) | 
TestDistributedFileSystem fails with Wrong FS on weird hosts |  Minor | test | 
Todd Lipcon | Todd Lipcon |
-| [HDFS-1377](https://issues.apache.org/jira/browse/HDFS-1377) | Quota bug for 
partial blocks allows quotas to be violated |  Blocker | namenode | Eli Collins 
| Eli Collins |
-| [HDFS-1406](https://issues.apache.org/jira/browse/HDFS-1406) | TestCLI fails 
on Ubuntu with default /etc/hosts |  Minor | . | Todd Lipcon | Konstantin 
Boudnik |
-| [MAPREDUCE-2262](https://issues.apache.org/jira/browse/MAPREDUCE-2262) | 
Capacity Scheduler unit tests fail with class not found |  Major | 
capacity-sched | Owen O'Malley | Owen O'Malley |
-| [HADOOP-6923](https://issues.apache.org/jira/browse/HADOOP-6923) | Native 
Libraries do not load if a different platform signature is returned from 
org.apache.hadoop.util.PlatformName |  Major | native | Stephen Watt | Stephen 
Watt |
-| [HDFS-1543](https://issues.apache.org/jira/browse/HDFS-1543) | Reduce dev. 
cycle time by moving system testing artifacts from default build and push to 
maven for HDFS |  Major | . | Arun C Murthy | Luke Lu |
-| [HDFS-1836](https://issues.apache.org/jira/browse/HDFS-1836) | Thousand of 
CLOSE\_WAIT socket |  Major | hdfs-client | Dennis Cheung | Bharath Mundlapudi |
-| [HADOOP-7116](https://issues.apache.org/jira/browse/HADOOP-7116) | raise 
contrib junit test jvm memory size to 512mb |  Major | test | Owen O'Malley | 
Owen O'Malley |
-
-
-### TESTS:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-6637](https://issues.apache.org/jira/browse/HADOOP-6637) | Benchmark 
overhead of RPC session establishment |  Major | benchmarks | Konstantin 
Shvachko | Konstantin Shvachko |
-
-
-### OTHER:
-
-| JIRA | Summary | Priority | Component | Reporter | Contributor |
-|:---- |:---- | :--- |:---- |:---- |:---- |
-| [HDFS-1286](https://issues.apache.org/jira/browse/HDFS-1286) | Dry entropy 
pool on Hudson boxes causing test timeouts |  Major | test | Todd Lipcon | 
Konstantin Boudnik |
-| [HADOOP-7372](https://issues.apache.org/jira/browse/HADOOP-7372) | Remove 
ref of 20.3 release from branch-0.20 CHANGES.txt |  Major | documentation | Eli 
Collins | Eli Collins |
-
-


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