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https://issues.apache.org/jira/browse/YARN-8862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16652313#comment-16652313
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Giovanni Matteo Fumarola commented on YARN-8862:
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Thanks [~botong] for the patch.
NIT: GlobalPolicyGenerator#serviceStop() is missing a NP check.
Otherwise, it is +1.
> [GPG] add Yarn Registry cleanup in ApplicationCleaner
> -----------------------------------------------------
>
> Key: YARN-8862
> URL: https://issues.apache.org/jira/browse/YARN-8862
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Botong Huang
> Assignee: Botong Huang
> Priority: Major
> Attachments: YARN-8862-YARN-7402.v1.patch,
> YARN-8862-YARN-7402.v2.patch, YARN-8862-YARN-7402.v3.patch
>
>
> In Yarn Federation, we use Yarn Registry to use the AMToken for UAMs in
> secondary sub-clusters. Because of potential more app attempts later,
> AMRMProxy cannot kill the UAM and delete the tokens when one local attempt
> finishes. So similar to the StateStore application table, we need
> ApplicationCleaner in GPG to cleanup the finished app entries in Yarn
> Registry.
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