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https://issues.apache.org/jira/browse/HBASE-12450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14203124#comment-14203124
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Hadoop QA commented on HBASE-12450:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12680338/HBASE-12450.patch
  against trunk revision .
  ATTACHMENT ID: 12680338

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:green}+1 tests included{color}.  The patch appears to include 6 new 
or modified tests.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any 
warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the 
total number of checkstyle errors

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines 
longer than 100

  {color:green}+1 site{color}.  The mvn site goal succeeds with this patch.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
                       
org.apache.hadoop.hbase.regionserver.wal.TestLogRollingNoCluster

     {color:red}-1 core zombie tests{color}.  There are 1 zombie test(s):       
at 
org.apache.hadoop.yarn.server.resourcemanager.TestContainerResourceUsage.testUsageWithMultipleContainersAndRMRestart(TestContainerResourceUsage.java:159)

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-rest.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Checkstyle Errors: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//artifact/patchprocess/checkstyle-aggregate.html

  Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/11619//console

This message is automatically generated.

> Unbalance chaos monkey might kill all region servers without starting them 
> back
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-12450
>                 URL: https://issues.apache.org/jira/browse/HBASE-12450
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Virag Kothari
>            Assignee: Virag Kothari
>            Priority: Minor
>             Fix For: 2.0.0, 0.98.8, 0.99.2
>
>         Attachments: HBASE-12450-0.98.patch, HBASE-12450.patch, 
> HBASE-12450.patch
>
>
> UnbalanceKillAndRebalanceAction does kill, balance and then start of region 
> servers. But if the balance fails exception is thrown causing the region 
> servers to not start. For me, the balance always kept on failing with socket 
> timeout (default 1 min) as master runs one iteration of balance for 5 mins 
> (default config). Eventually all servers are killed but never started back.



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