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https://issues.apache.org/jira/browse/MAPREDUCE-2206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965364#action_12965364
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Scott Chen commented on MAPREDUCE-2206:
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I think we should avoid always scheduling cleanup task on the same node. I will 
also make that change in this patch.

> The task-cleanup tasks should be optional
> -----------------------------------------
>
>                 Key: MAPREDUCE-2206
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2206
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker
>    Affects Versions: 0.23.0
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>             Fix For: 0.23.0
>
>
> For job does not use OutputCommitter.abort(), this should be able to turn off.
> This improves the latency of the job because failed tasks are often the 
> bottleneck of the jobs.

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