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https://issues.apache.org/jira/browse/MAPREDUCE-3859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13776788#comment-13776788
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Mike Roark commented on MAPREDUCE-3859:
---------------------------------------
I recently tested this issue in CDH4.2 to determine if we needed to patch it. I
couldn't reproduce it, so it must have gotten fixed by that version.
> CapacityScheduler incorrectly utilizes extra-resources of queue for
> high-memory jobs
> ------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-3859
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3859
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: capacity-sched
> Affects Versions: 1.0.0
> Reporter: Sergey Tryuber
> Assignee: Sergey Tryuber
> Fix For: 1.2.1
>
> Attachments: MAPREDUCE-3859_MR1_fix_and_test.patch.txt,
> test-to-fail.patch.txt
>
>
> Imagine, we have a queue A with capacity 10 slots and 20 as extra-capacity,
> jobs which use 3 map slots will never consume more than 9 slots, regardless
> how many free slots on a cluster.
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