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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2327) YARN should warn about nodes with poor clock synchronization
Date Wed, 03 Sep 2014 22:01:53 GMT

    [ https://issues.apache.org/jira/browse/YARN-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120550#comment-14120550
] 

Vinod Kumar Vavilapalli commented on YARN-2327:
-----------------------------------------------

Delegation Tokens are only verified on the servers (NN or RM), so this issue doesn't happen
there. The right analogy is block-tokens, which have the same issue.

> 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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