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https://issues.apache.org/jira/browse/MAPREDUCE-2441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032173#comment-13032173
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Allen Wittenauer commented on MAPREDUCE-2441:
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Actually, let me correct myself. Task stealing does work--but in a sort of
weird and unpredictable way. Basically, an individual user is limited to the
"natural" size of the queue they submitted. So if two users are in the same
queue that queue can steal up to 2xqueue size, etc.
> regression: maximum limit of -1 + user-lmit math appears to be off
> ------------------------------------------------------------------
>
> Key: MAPREDUCE-2441
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2441
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/capacity-sched
> Affects Versions: 0.20.203.0
> Reporter: Allen Wittenauer
> Priority: Critical
> Attachments: capsched.xml
>
>
> The math around the slot usage when maximum-capacity=-1 appears to be faulty.
> See comments.
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