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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1869) TaskTracker hung in org.apache.hadoop.fs.LocalDirAllocator
Date Tue, 15 Jun 2010 23:11:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879170#action_12879170
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Allen Wittenauer commented on MAPREDUCE-1869:
---------------------------------------------

It is also worth mentioning that the datanode on the same machine appears to be happy as a
claim, no errors in messages, etc, etc. I'm running a ZFS zpool scrub just to double check
the fs, but I doubt it will show anything interesting.

> TaskTracker hung in org.apache.hadoop.fs.LocalDirAllocator
> ----------------------------------------------------------
>
>                 Key: MAPREDUCE-1869
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1869
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.20.2
>         Environment: Solaris 10 Update 7
> Java 1.6.0_14
>            Reporter: Allen Wittenauer
>            Priority: Critical
>         Attachments: jstack.txt, pstack.txt
>
>
> A TaskTracker process on our grid appears to be locked up and not sending heartbeats
to the namenode.  Attaching jstack and pstack output.  Even tho the hangs appear to be in
LocalDirAllocator, the local file system seems to be a-ok.  

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