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https://issues.apache.org/jira/browse/MAPREDUCE-270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758114#action_12758114
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Arun C Murthy commented on MAPREDUCE-270:
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We've seen the lack of out-of-band heartbeat cause severe latency issues for
some class of small applications. I'd like to use this jira to re-introduce
out-of-band heartbeats when configured for completion of any task. Thoughts?
> 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
>
> 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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