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https://issues.apache.org/jira/browse/MAPREDUCE-2441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032504#comment-13032504
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Allen Wittenauer commented on MAPREDUCE-2441:
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Nope, not about user-limit-factor. But doesn't this mean that the first jobs
in an expanding queue can starve out jobs in another queue? In other words, if
I have:
job1 = max-lim -1 queue
job2 = max-lim -1 queue
job3 = max-lim % queue
job1 and job2 could take all slots before job3 gets executed, especially if
they are submitted by the same user and that is the only user in the job
submission queue.
> 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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