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https://issues.apache.org/jira/browse/YARN-685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13707292#comment-13707292
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Ravi Prakash commented on YARN-685:
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I meant a randomwriter with 490 maps and 0 reduces. The sorter also had 490
maps, but 70 reduces.
> Capacity Scheduler is not distributing the reducers tasks across the cluster
> ----------------------------------------------------------------------------
>
> Key: YARN-685
> URL: https://issues.apache.org/jira/browse/YARN-685
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Affects Versions: 2.0.4-alpha
> Reporter: Devaraj K
>
> If we have reducers whose total memory required to complete is less than the
> total cluster memory, it is not assigning the reducers to all the nodes
> uniformly(~uniformly). Also at that time there are no other jobs or job tasks
> running in the cluster.
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