Sunil G commented on YARN-3142:

Thanks [~varun_saxena] for the initial patch. I think generally we are trying 
to safeguard the internal data stored in {{AppSchedulingInfo}} and some 
criticial section code paths. I think we must look into a much fine grained 
version of locking targeting these areas. I think its a good step ahead to get 
the improvements eventhough its little.

> Improve locks in AppSchedulingInfo
> ----------------------------------
>                 Key: YARN-3142
>                 URL: https://issues.apache.org/jira/browse/YARN-3142
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager, scheduler
>            Reporter: Wangda Tan
>            Assignee: Varun Saxena
>         Attachments: YARN-3142.01.patch

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