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Bibin A Chundatt commented on YARN-5773:
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Attached patch removing num of apps check
> 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, YARN-5773.0002.patch, YARN-5773.0004.patch,
YARN-5773.0005.patch, YARN-5773.0006.patch, YARN-5773.003.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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