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https://issues.apache.org/jira/browse/YARN-2001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13990091#comment-13990091
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Karthik Kambatla commented on YARN-2001:
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I am not quite sure if this is a good idea. The RM should start doing what it
can do irrespective of the NMs coming up - accepting applications, serving
information etc.
> Persist NMs info for RM restart
> -------------------------------
>
> Key: YARN-2001
> URL: https://issues.apache.org/jira/browse/YARN-2001
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Jian He
> Assignee: Jian He
>
> RM should not accept allocate requests from AMs until all the NMs have
> registered with RM. For that, RM needs to remember the previous NMs and wait
> for all the NMs to register.
> This is also useful for remembering decommissioned nodes across restarts.
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