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https://issues.apache.org/jira/browse/HDFS-6461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14013523#comment-14013523
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Hudson commented on HDFS-6461:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #568 (See 
[https://builds.apache.org/job/Hadoop-Yarn-trunk/568/])
HDFS-6461. Use Time#monotonicNow to compute duration in DataNode#shutDown. 
Contributed by James Thomas. (wang: 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1598399)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java


> Use Time#monotonicNow to compute duration in DataNode#shutDown
> --------------------------------------------------------------
>
>                 Key: HDFS-6461
>                 URL: https://issues.apache.org/jira/browse/HDFS-6461
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.5.0
>            Reporter: James Thomas
>            Assignee: James Thomas
>            Priority: Trivial
>             Fix For: 2.5.0
>
>         Attachments: HDFS-6461.3.patch, HDFS-6461.patch, HDFS-6461.patch
>
>
> The system time can move around for various reasons, so we convert to 
> monotonicNow to ensure greater accuracy when computing a duration in this 
> method. 



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