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https://issues.apache.org/jira/browse/YARN-4597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15569147#comment-15569147
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Jian He commented on YARN-4597:
-------------------------------
bq. This will preserve the serial nature of operation (and thereby keep the
code simple by not needing synchronized collections)
I don't actually see a synchronized collection in the ContainerScheduler. I
agree with the point that this could avoid holding up the main containerManager
thread. we can have ContainerScheduler create its own dispatcher.
> Add SCHEDULE to NM container lifecycle
> --------------------------------------
>
> Key: YARN-4597
> URL: https://issues.apache.org/jira/browse/YARN-4597
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Reporter: Chris Douglas
> Assignee: Arun Suresh
> Attachments: YARN-4597.001.patch, YARN-4597.002.patch
>
>
> Currently, the NM immediately launches containers after resource
> localization. Several features could be more cleanly implemented if the NM
> included a separate stage for reserving resources.
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