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https://issues.apache.org/jira/browse/YARN-1363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845165#comment-13845165
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Zhijie Shen commented on YARN-1363:
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8. RMDelegationTokenSecretManager has the cleanup thread to clean the
outstanding DT operations that have been finished, but the results have never
been polled by the client, which is possible if the client crashes.
> Get / Cancel / Renew delegation token api should be non blocking
> ----------------------------------------------------------------
>
> Key: YARN-1363
> URL: https://issues.apache.org/jira/browse/YARN-1363
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Omkar Vinit Joshi
> Assignee: Zhijie Shen
> Attachments: YARN-1363.1.patch, YARN-1363.2.patch
>
>
> Today GetDelgationToken, CancelDelegationToken and RenewDelegationToken are
> all blocking apis.
> * As a part of these calls we try to update RMStateStore and that may slow it
> down.
> * Now as we have limited number of client request handlers we may fill up
> client handlers quickly.
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