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Date: Thu, 29 Aug 2013 14:45:17 +0000 (UTC)
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Message-ID: <JIRA.12664896.1377109339738.54326.1377787517336@arcas>
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Subject: [jira] [Commented] (HADOOP-9894) Race condition in Shell leads to
 logged error stream handling exceptions
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    [ https://issues.apache.org/jira/browse/HADOOP-9894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753674#comment-13753674 ] 

Hudson commented on HADOOP-9894:
--------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #1533 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1533/])
HADOOP-9894.  Race condition in Shell leads to logged error stream handling exceptions (Arpit Agarwal) (arp: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1518420)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/Shell.java

                
> Race condition in Shell leads to logged error stream handling exceptions
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-9894
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9894
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 2.1.0-beta
>            Reporter: Jason Lowe
>            Assignee: Arpit Agarwal
>         Attachments: hadoop-9894.01.patch
>
>
> Shell.runCommand starts an error stream handling thread and normally joins with it before closing the error stream.  However if parseExecResult throws an exception (e.g.: like Stat.parseExecResult does for FileNotFoundException) then the error thread is not joined and the error stream can be closed before the error stream handling thread is finished.  This causes the error stream handling thread to log an exception backtrace for a "normal" situation.

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