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Posted to mapreduce-issues@hadoop.apache.org by "Andy Isaacson (JIRA)" <ji...@apache.org> on 2012/07/23 21:32:34 UTC

[jira] [Updated] (MAPREDUCE-2374) Should not use PrintWriter to write taskjvm.sh

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Isaacson updated MAPREDUCE-2374:
-------------------------------------

    Attachment: mapreduce-2374.txt

Attaching a patch implementing the suggestion to remove "-c" from the bash command line, thereby avoiding the only code path which can return ETXTBSY under non-SElinux semantics.
                
> Should not use PrintWriter to write taskjvm.sh
> ----------------------------------------------
>
>                 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: mapreduce-2374-on-20sec.txt, mapreduce-2374.txt
>
>
> 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.

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