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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2001) Persist NMs info for RM restart
Date Mon, 05 May 2014 23:36:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-2001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13990091#comment-13990091
] 

Karthik Kambatla commented on YARN-2001:
----------------------------------------

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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