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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2374) "Text File Busy" errors launching MR tasks
Date Thu, 23 Aug 2012 19:50:42 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13440598#comment-13440598
] 

Hudson commented on MAPREDUCE-2374:
-----------------------------------

Integrated in Hadoop-Common-trunk-Commit #2629 (See [https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2629/])
    MAPREDUCE-2374. "Text File Busy" errors launching MR tasks. Contributed by Andy Isaacson.
(Revision 1376632)

     Result = SUCCESS
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1376632
Files : 
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DefaultContainerExecutor.java

                
> "Text File Busy" errors launching MR tasks
> ------------------------------------------
>
>                 Key: MAPREDUCE-2374
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2374
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Andy Isaacson
>             Fix For: 1.2.0, 0.23.3, 2.2.0-alpha
>
>         Attachments: failed_taskjvmsh.strace, mapreduce-2374-2.txt, mapreduce-2374-branch-1.patch,
mapreduce-2374-on-20sec.txt, mapreduce-2374.txt, mapreduce-2374.txt, mapreduce-2374.txt, successfull_taskjvmsh.strace
>
>
> Some very small percentage of tasks fail with a "Text file busy" error.
> The following was the original diagnosis:
> {quote}
> Our use of PrintWriter in TaskController.writeCommand is unsafe, since that class swallows
all IO exceptions. We're not currently checking for errors, which I'm seeing result in occasional
task failures with the message "Text file busy" - assumedly because the close() call is failing
silently for some reason.
> {quote}
> .. but turned out to be another issue as well (see below)

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