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https://issues.apache.org/jira/browse/YARN-4403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15037208#comment-15037208
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Sunil G commented on YARN-4403:
-------------------------------

Thanks [~xinxianyin] for updating this, I missed this somehow.
It seems like you are handling Monotonic Clock in various YARN code which uses 
clock.
So it can be made as general ticket in YARN.
Meantime I will raise an MR ticket to handle this for MapReduce. MAPREDUCE-6562 
is linked for the same.

> (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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