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https://issues.apache.org/jira/browse/HADOOP-9181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13553727#comment-13553727
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Hudson commented on HADOOP-9181:
--------------------------------

Integrated in Hadoop-Hdfs-0.23-Build #495 (See 
[https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/495/])
    HADOOP-9181. Set daemon flag for HttpServer's QueuedThreadPool (Liang Xie 
via tgraves) (Revision 1432972)

     Result = FAILURE
tgraves : 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1432972
Files : 
* 
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/CHANGES.txt
* 
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpServer.java

                
> Set daemon flag for HttpServer's QueuedThreadPool
> -------------------------------------------------
>
>                 Key: HADOOP-9181
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9181
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 2.0.2-alpha
>            Reporter: liang xie
>            Assignee: liang xie
>             Fix For: 2.0.3-alpha, 0.23.6
>
>         Attachments: HADOOP-9181.txt
>
>
> we hit HBASE-6031 again, after looking into thread dump, it was caused by the 
> threads from QueuedThreadPool are user thread, not daemon thread, so the 
> hbase shutdownhook never be called and the hbase instance was hung.
> Furthermore, i saw daemon be set in fb-20 branch, let's set in trunk codebase 
> as well, it should be safe:)

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