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https://issues.apache.org/jira/browse/HADOOP-14713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16178321#comment-16178321
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Chetna Chaudhari commented on HADOOP-14713:
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Thanks [~templedf] will create JIRA per package for the test classes. 

> Audit for durations that should be measured via Time.monotonicNow
> -----------------------------------------------------------------
>
>                 Key: HADOOP-14713
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14713
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Jason Lowe
>            Assignee: Chetna Chaudhari
>              Labels: newbie
>
> Whenever we are measuring a time delta or duration in the same process, the 
> timestamps probably should be using Time.monotonicNow rather than Time.now or 
> System.currentTimeMillis.  The latter two are directly reading the system 
> clock which can move faster or slower than actual time if the system is 
> undergoing a time adjustment (e.g.: adjtime or admin sets a new system time).
> We should go through the code base and identify places where the code is 
> using the system clock but really should be using monotonic time.



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