[ http://issues.apache.org/jira/browse/HADOOP-597?page=all ]
Doug Cutting resolved HADOOP-597.
---------------------------------
Resolution: Fixed
I just committed this. Thanks, Owen.
> transmission errors to the reduce will cause map output to be considered lost
> -----------------------------------------------------------------------------
>
> Key: HADOOP-597
> URL: http://issues.apache.org/jira/browse/HADOOP-597
> Project: Hadoop
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Owen O'Malley
> Assigned To: Owen O'Malley
> Fix For: 0.7.1
>
> Attachments: map-output-protect-2.patch, map-output-protect.patch
>
>
> When the mapOutput servlet gets an IOException from reading the map output
> file, it correctly declares the map output lost. However, an IOException
> writing to the socket should NOT cause the map output to be declared lost.
> Unfortunately, the current implementation always declares the map output
> lost. When the map output is lost, the map is re-run on a different computer.
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