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https://issues.apache.org/jira/browse/YARN-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated YARN-2327:
---------------------------------------

    Description: 
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.

  was:
YARN should warn about nodes with poor clock synchronization.

YARN statistics rely on approximate clock synchronization in a few cases (see 
YARN-2251), but we currently don't warn if this assumption is violated.


> 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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