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https://issues.apache.org/jira/browse/YARN-355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13560808#comment-13560808
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Daryn Sharp commented on YARN-355:
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The RM needs to short-circuit the RPC loopback connection to itself, and
directly/internally renew its own tokens. I attempted to do this in the JT for
1.x, so I'll dig up the patch.
> RM app submission jams under load
> ---------------------------------
>
> Key: YARN-355
> URL: https://issues.apache.org/jira/browse/YARN-355
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 3.0.0, 2.0.0-alpha, 0.23.6
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Blocker
>
> The RM performs a loopback connection to itself to renew its own tokens. If
> app submissions consume all RPC handlers for {{ClientRMProtocol}}, then app
> submissions block because it cannot loopback to itself to do the renewal.
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