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https://issues.apache.org/jira/browse/YARN-10722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17312661#comment-17312661
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Fengnan Li commented on YARN-10722:
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[~zhuqi] Thanks for asking. I will put a doc about it soon.
> Improvement to DelegationTokenRenewer in RM
> -------------------------------------------
>
> Key: YARN-10722
> URL: https://issues.apache.org/jira/browse/YARN-10722
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: RM, yarn
> Reporter: Fengnan Li
> Assignee: Fengnan Li
> Priority: Major
>
> We have seen multiple issues related with Yarn DelegationTokenRenewer,
> especially when namenodes where the token was given had some issues (i.e.
> standby down). This component has become a SPOF blocking all Yarn
> applications to be accepted.
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