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https://issues.apache.org/jira/browse/YARN-5773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bibin A Chundatt updated YARN-5773:
-----------------------------------
    Attachment: YARN-5773.0001.patch

Attaching patch for the same. Capacity scheduler on recovery provides whether 
attempts is of type recovery or not. Skipping LeafQueue#activateApplication() 
when the attempt is of type recovery.

> RM recovery too slow due to LeafQueue#activateApplication()
> -----------------------------------------------------------
>
>                 Key: YARN-5773
>                 URL: https://issues.apache.org/jira/browse/YARN-5773
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Bibin A Chundatt
>            Assignee: Bibin A Chundatt
>            Priority: Critical
>         Attachments: YARN-5773.0001.patch
>
>
> # Submit application 10K application to default queue.
> # All applications are in accepted state
> # Now restart resourcemanager
> For each application recovery {{LeafQueue#activateApplications()}} is 
> invoked.Resulting in AM limit check to be done even before Node managers are 
> getting registered.
> Total iteration for N application is about {{N(N+1)/2}} for {{10K}} 
> application   {{50000000}} iterations causing time take for Rm to be active 
> more than 10 min.
> Since NM resources are not yet added to during recovery we should skip 
> {{activateApplicaiton()}} 



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