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From "Mike Roark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3859) CapacityScheduler incorrectly utilizes extra-resources of queue for high-memory jobs
Date Wed, 15 May 2013 21:27:16 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13658844#comment-13658844
] 

Mike Roark commented on MAPREDUCE-3859:
---------------------------------------

Good call, I'd forgotten to readjust mapred.capacity-scheduler.default-user-limit-factor after
I added some additional queues, so it was skewing the numbers.

After fixing that I got exactly what I expected.
                
> 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
>         Environment: CDH3u1
>            Reporter: Sergey Tryuber
>            Assignee: Sergey Tryuber
>         Attachments: 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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