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https://issues.apache.org/jira/browse/YARN-4177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14802911#comment-14802911
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Xianyin Xin commented on YARN-4177:
-----------------------------------
In a following steps I would try to fix several important places where clock is
misused.
> yarn.util.Clock should not be used to time a duration or time interval
> ----------------------------------------------------------------------
>
> Key: YARN-4177
> URL: https://issues.apache.org/jira/browse/YARN-4177
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Xianyin Xin
> Attachments: YARN-4177.001.patch
>
>
> There're many places uses Clock to time intervals, which is dangerous as
> commented by [~ste...@apache.org] in HADOOP-12409. Instead, we should use
> hadoop.util.Timer#monotonicNow() to get monotonic time. Or we could provide a
> MonotonicClock in yarn.util considering the consistency of code.
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