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https://issues.apache.org/jira/browse/MAPREDUCE-3859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13209145#comment-13209145
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Sergey Tryuber commented on MAPREDUCE-3859:
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We've tried to play with user-limit-factor in any variants (2,3, 10, 100 and
even more). Well, Arun, I just write a test for CapacityScheduler (this test
should fail). Before preparing any patches, I'll put the code here and you'll
take a look on it. Ok?
> 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: contrib/capacity-sched
> Affects Versions: 1.0.0
> Environment: CDH3u1
> Reporter: Sergey Tryuber
>
> 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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