Devaraj K commented on YARN-3826:

[~chengbing.liu], Did you get any chance to look into the above comment on the 
patch? Thanks

> Race condition in ResourceTrackerService: potential wrong diagnostics messages
> ------------------------------------------------------------------------------
>                 Key: YARN-3826
>                 URL: https://issues.apache.org/jira/browse/YARN-3826
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.7.0
>            Reporter: Chengbing Liu
>            Assignee: Chengbing Liu
>         Attachments: YARN-3826.01.patch
> Since we are calling {{setDiagnosticsMessage}} in {{nodeHeartbeat}}, which 
> can be called concurrently, the static {{resync}} and {{shutdown}} may have 
> wrong diagnostics messages in some cases.
> On the other side, these static members can hardly save any memory, since the 
> normal heartbeat responses are created for each heartbeat.

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