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https://issues.apache.org/jira/browse/YARN-5353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15373026#comment-15373026
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Varun Saxena commented on YARN-5353:
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LGTM.
Will commit it later today unless there are further comments.
> ResourceManager can leak delegation tokens when they are shared across apps
> ---------------------------------------------------------------------------
>
> Key: YARN-5353
> URL: https://issues.apache.org/jira/browse/YARN-5353
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.7.0, 2.6.1
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Critical
> Attachments: YARN-5353.001.patch
>
>
> Recently saw a ResourceManager go into heavy GC. Heap dump showed that there
> were millions of delegation tokens on the heap. It looks like most of them
> belonged to the appTokens map in DelegationTokenRenewer. When an app
> completes and tokens are removed for it, I noticed that the appTokens entry
> for the app is not cleaned up if tokens were shared with other active apps.
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