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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4403) (AM/NM/Container)LivelinessMonitor should use monotonic time when calculating period
Date Wed, 02 Dec 2015 14:26:10 GMT

    [ https://issues.apache.org/jira/browse/YARN-4403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15035871#comment-15035871
] 

Sunil G commented on YARN-4403:
-------------------------------

Hi [~djp]
Thanks for the patch. Yes, its better to use {{MonotonicClock}} generally.
We also use SystemClock in proportional preemption policy, I feel as you mentioned a general
YARN ticket can handle all this together.

> (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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