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From "David Ginzburg (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2638) Create a simple stress test for the fair scheduler
Date Wed, 18 Jan 2012 09:35:39 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13188357#comment-13188357

David Ginzburg commented on MAPREDUCE-2638:

I'm not sure this is related to this issue, but I suspect preemption causes 
Inconsistent result when fairscheduler preemption is on.
I have reported it at http://mail-archives.apache.org/mod_mbox/hadoop-mapreduce-user/201201.mbox/%3CSNT135-W231F0B5F0D6A3AE0A5EDC9B79F0@phx.gbl%3E

Maybe this stress test can help reproduce it easily, on clusters other than the one I'm running.
> Create a simple stress test for the fair scheduler
> --------------------------------------------------
>                 Key: MAPREDUCE-2638
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2638
>             Project: Hadoop Map/Reduce
>          Issue Type: Test
>          Components: contrib/fair-share
>            Reporter: Tom White
>            Assignee: Tom White
>             Fix For: 0.24.0
>         Attachments: MAPREDUCE-2638.patch, MAPREDUCE-2638.patch
> This would be a test that runs against a cluster, typically with settings that allow
preemption to be exercised.

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