Chengbing Liu commented on YARN-6967:

[~templedf] [~andras.piros] Could you review the patch again? Thanks!

> Limit application attempt's diagnostic message size thoroughly
> --------------------------------------------------------------
>                 Key: YARN-6967
>                 URL: https://issues.apache.org/jira/browse/YARN-6967
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.8.1
>            Reporter: Chengbing Liu
>            Assignee: Chengbing Liu
>         Attachments: YARN-6967.01.patch
> YARN-6125 implemented {{BoundedAppender}} and applied to the field 
> {{diagnostics}} to limit the diagnostic message's size.
> However, some code bypasses this limit. In 
> {{RMAppAttemptImpl.rememberTargetTransitionsAndStoreState(...)}}, a local 
> variable {{diags}} will finally be written into ZooKeeper if ZKRMStateStore 
> is used.
> A simple fix is to also use {{BoundedAppender}} for the local variable.

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