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https://issues.apache.org/jira/browse/HBASE-13036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326268#comment-14326268
 ] 

Hadoop QA commented on HBASE-13036:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12699484/13036-2.txt
  against master branch at commit d64ce3106378ad505389ab7704127c498f92be37.
  ATTACHMENT ID: 12699484

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

    {color:green}+1 tests included{color}.  The patch appears to include 3 new 
or modified tests.
    {color:green}+1 hadoop versions{color}. The patch compiles with all 
supported hadoop versions (2.4.1 2.5.2 2.6.0)

    {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.master.TestDistributedLogSplitting

     {color:red}-1 core zombie tests{color}.  There are 3 zombie test(s):       
at 
org.apache.hadoop.hbase.coprocessor.TestMasterObserver.testRegionTransitionOperations(TestMasterObserver.java:1604)

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-rest.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html
Checkstyle Errors: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//artifact/patchprocess/checkstyle-aggregate.html

  Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/12894//console

This message is automatically generated.

> Meta scanner should use its own threadpool
> ------------------------------------------
>
>                 Key: HBASE-13036
>                 URL: https://issues.apache.org/jira/browse/HBASE-13036
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Devaraj Das
>         Attachments: 13036-1.txt, 13036-2.txt
>
>
> Currently, during region location lookups, the meta is scanned and for this 
> the scanner submits a request to the thread pool of the table in question. 
> Sometimes, it might happen that many scan requests are simultaneously 
> submitted on the table - let's say 256, and this is the max size of the 
> thread pool. Each of these scan requests would in turn submit meta scan 
> requests on the same thread pool, but they will be in the queue. The meta 
> scans will not happen and the original table scans would lock up. The meta 
> scans should use a different thread pool.



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