[ 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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