Jian He commented on YARN-3867:

Had an offline discussion with Wangda,  given that the current update logic is 
fairly light weighted and even the nm-state-store operation happens 
synchronously at user-level API, we may also synchronously update the container 
size on the increaseContainersResource call ? The benefit is that user can get 
fast notification that the container is re-sized immediately when the call 
returns. We can always re-visit this part if this really becomes a bottleneck 
as the API itself won't change either ways.

> ContainerImpl changes to support container resizing
> ---------------------------------------------------
>                 Key: YARN-3867
>                 URL: https://issues.apache.org/jira/browse/YARN-3867
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>            Reporter: MENG DING
>            Assignee: MENG DING
>         Attachments: YARN-3867-YARN-1197.3.patch, 
> YARN-3867-YARN-1197.4.patch, YARN-3867.1.patch, YARN-3867.2.patch
> 1) ContainerImpl logic changes in NM to handle events related to container 
> resizing
> 2) Relevant test cases

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