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https://issues.apache.org/jira/browse/YARN-1197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14588965#comment-14588965
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Vinod Kumar Vavilapalli commented on YARN-1197:
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bq. I don't think it's possible for the AM to start using the additional
allocation till the NM has updated all it's state - including writing out
recovery information for work preserving restart (Thanks Vinod for pointing
this out). Seems like that poll/callback will be required - unless the plan is
to route this information via the RM.
We could just use the existing getContainerStatus() API for doing this polling
for now.
> 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 old-design-docs-patches-for-reference.zip,
> YARN-1197_Design.pdf
>
>
> The current YARN resource management logic assumes resource allocated to a
> container is fixed during the lifetime of it. When users want to change a
> resource
> of an allocated container the only way is releasing it and allocating a new
> container with expected size.
> Allowing run-time changing resources of an allocated container will give us
> better control of resource usage in application side
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