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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2374) "Text File Busy" errors launching MR tasks
Date Thu, 26 Jul 2012 00:12:34 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13422754#comment-13422754
] 

Hadoop QA commented on MAPREDUCE-2374:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12537923/mapreduce-2374-2.txt
  against trunk revision .

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2662//console

This message is automatically generated.
                
> "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: Todd Lipcon
>             Fix For: 0.22.1
>
>         Attachments: failed_taskjvmsh.strace, mapreduce-2374-2.txt, mapreduce-2374-branch-1.patch,
mapreduce-2374-on-20sec.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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