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https://issues.apache.org/jira/browse/YARN-2679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14275001#comment-14275001
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zhihai xu commented on YARN-2679:
---------------------------------

Sorry, I forget to add verification in the test. I attached an addendum patch 
which add verification in the test.

> Add metric for container launch duration
> ----------------------------------------
>
>                 Key: YARN-2679
>                 URL: https://issues.apache.org/jira/browse/YARN-2679
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>    Affects Versions: 2.5.0
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>              Labels: metrics, supportability
>             Fix For: 2.7.0
>
>         Attachments: YARN-2679.000.patch, YARN-2679.001.patch, 
> YARN-2679.002.patch, YARN-2679.addendum.1.patch
>
>
> add metrics in NodeManagerMetrics to get prepare time to launch container.
> The prepare time is the duration between sending 
> ContainersLauncherEventType.LAUNCH_CONTAINER event and receiving  
> ContainerEventType.CONTAINER_LAUNCHED event.



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