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From "Mahadev konar (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-262) the reduce tasks do not report progress if they the map output locations is empty.
Date Tue, 30 May 2006 19:04:30 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-262?page=all ]

Mahadev konar updated HADOOP-262:
---------------------------------

    Attachment: reduce_sleep.patch

here is a patch that reports progress while its sleeping and waiting for more map outputs.

> the reduce tasks do not report progress if they the map output locations is empty.
> ----------------------------------------------------------------------------------
>
>          Key: HADOOP-262
>          URL: http://issues.apache.org/jira/browse/HADOOP-262
>      Project: Hadoop
>         Type: Bug

>   Components: mapred
>     Reporter: Mahadev konar
>     Assignee: Mahadev konar
>  Attachments: reduce_sleep.patch
>
> The ReduceTaskRunner should report progress even if the number of ouput locations to
copy is empty. In case, the last few maps are running on a tasktracker that goes down, all
the reduce tasks waiting for these mapoutputs would fail.

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