Jian He commented on YARN-3866:

bq. increaseRequests/decreaseRequests - We may just pass one list of 

[~sandyr], Would like to hear some thoughts from  an application wirter's 
perspective. mind sharing some thoughts here ? In case of Spark, do you think 
two separate increase/decrease requests in the AllocateRequest is better or a 
single changeResourceRequests ?

> AM-RM protocol changes to support container resizing
> ----------------------------------------------------
>                 Key: YARN-3866
>                 URL: https://issues.apache.org/jira/browse/YARN-3866
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: api
>            Reporter: MENG DING
>            Assignee: MENG DING
>         Attachments: YARN-3866.1.patch, YARN-3866.2.patch
> YARN-1447 and YARN-1448 are outdated. 
> This ticket deals with AM-RM Protocol changes to support container resize 
> according to the latest design in YARN-1197.
> 1) Add increase/decrease requests in AllocateRequest
> 2) Get approved increase/decrease requests from RM in AllocateResponse
> 3) Add relevant test cases

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