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https://issues.apache.org/jira/browse/YARN-910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13719020#comment-13719020
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Karthik Kambatla commented on YARN-910:
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MAPREDUCE-5418 will require something like this.
> Allow auxiliary services to listen for container starts and completions
> -----------------------------------------------------------------------
>
> Key: YARN-910
> URL: https://issues.apache.org/jira/browse/YARN-910
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: nodemanager
> Affects Versions: 2.1.0-beta
> Reporter: Sandy Ryza
>
> Making container start and completion events available to auxiliary services
> would allow them to be resource-aware. The auxiliary service would be able
> to notify a co-located service that is opportunistically using free capacity
> of allocation changes.
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