Alejandro Abdelnur commented on YARN-2327:

I'm not sure we should get into this. I would rely on the assumption that NTP 
is properly configured, including authentication to avoid attacks there.

> YARN should warn about nodes with poor clock synchronization
> ------------------------------------------------------------
>                 Key: YARN-2327
>                 URL: https://issues.apache.org/jira/browse/YARN-2327
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Zhijie Shen
> YARN should warn about nodes with poor clock synchronization.
> YARN relies on approximate clock synchronization to report certain elapsed 
> time statistics (see YARN-2251), but we currently don't warn if this 
> assumption is violated.

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