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https://issues.apache.org/jira/browse/YARN-1197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13784222#comment-13784222
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Sandy Ryza commented on YARN-1197:
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It seems to me that for the reasons Bikas mentioned and for consistency with
the way container launch is done, the AM should be the one who tells the NM to
do the resize. If resources are released, then the NM would tell the RM about
the newly free space on its next heartbeat after the resize has completed.
Only then would the scheduler consider those resources available.
> Support changing resources of an allocated container
> ----------------------------------------------------
>
> Key: YARN-1197
> URL: https://issues.apache.org/jira/browse/YARN-1197
> Project: Hadoop YARN
> Issue Type: Task
> Components: api, nodemanager, resourcemanager
> Affects Versions: 2.1.0-beta
> Reporter: Wangda Tan
> Attachments: yarn-1197.pdf
>
>
> Currently, YARN cannot support merge several containers in one node to a big
> container, which can make us incrementally ask resources, merge them to a
> bigger one, and launch our processes. The user scenario is described in the
> comments.
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