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https://issues.apache.org/jira/browse/YARN-4403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15035950#comment-15035950
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Junping Du commented on YARN-4403:
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bq. For YARN/MR, I could also definitely help in getting it in shape once this 
is in.
Sure. Feel free to create/assign JIRA and work on it. I will help to review. 
Thanks! 

> (AM/NM/Container)LivelinessMonitor should use monotonic time when calculating 
> period
> ------------------------------------------------------------------------------------
>
>                 Key: YARN-4403
>                 URL: https://issues.apache.org/jira/browse/YARN-4403
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Junping Du
>            Assignee: Junping Du
>            Priority: Critical
>         Attachments: YARN-4403.patch
>
>
> Currently, (AM/NM/Container)LivelinessMonitor use current system time to 
> calculate a duration of expire which could be broken by settimeofday. We 
> should use Time.monotonicNow() instead.



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