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https://issues.apache.org/jira/browse/YARN-2868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14274317#comment-14274317
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Karthik Kambatla commented on YARN-2868:
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bq. implementation of scheduler should make sure that
I would prefer thread-safety be handled at the callee, and not be deferred to 
the caller. 

> Add metric for initial container launch time
> --------------------------------------------
>
>                 Key: YARN-2868
>                 URL: https://issues.apache.org/jira/browse/YARN-2868
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Ray Chiang
>            Assignee: Ray Chiang
>              Labels: metrics, supportability
>         Attachments: YARN-2868-01.patch, YARN-2868.002.patch, 
> YARN-2868.003.patch, YARN-2868.004.patch, YARN-2868.005.patch
>
>
> Add a metric to measure the latency between "starting container allocation" 
> and "first container actually allocated".



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