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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-813) map tasks lost during sort
Date Fri, 15 Dec 2006 23:33:23 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-813?page=all ]

Doug Cutting resolved HADOOP-813.
---------------------------------

    Resolution: Fixed

I just committed this.  Thanks, Devaraj!

> map tasks lost during sort
> --------------------------
>
>                 Key: HADOOP-813
>                 URL: http://issues.apache.org/jira/browse/HADOOP-813
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.10.0
>            Reporter: Owen O'Malley
>         Assigned To: Devaraj Das
>             Fix For: 0.10.0
>
>         Attachments: 813.patch, 813.patch
>
>
> On a 500 node cluster, I had a bunch of map tasks get "lost" because they failed to report
progress for 10 minutes. They appear to be in the sort stage at the end of the map. I hypothesize
that the patch for HADOOP-331 does not update the map's progress during the sort/merge. If
the sort/merge takes more than 10 minutes, the task is lost.

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