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Date: Thu, 24 Sep 2009 13:58:16 -0700 (PDT)
From: "Devaraj Das (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Commented: (MAPREDUCE-270) TaskTracker could send an
 out-of-band heartbeat when the last running map/reduce completes
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759258#action_12759258 ] 

Devaraj Das commented on MAPREDUCE-270:
---------------------------------------

+1 core changes look fine.

> TaskTracker could send an out-of-band heartbeat when the last running map/reduce completes
> ------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-270
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-270
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>         Attachments: MAPREDUCE-270.patch, MAPREDUCE-270.patch, MAPREDUCE-270_yhadoop20.patch, MAPREDUCE-270_yhadoop20.patch
>
>
> Currently the TaskTracker strictly respects the heartbeat interval, this causes utilization issues when all running tasks complete. We could send an out-of-band heartbeat in that case.

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