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https://issues.apache.org/jira/browse/YARN-9768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16959003#comment-16959003
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Manikandan R commented on YARN-9768:
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[~inigoiri] Thanks for quick review.
Addressed all of your comments. Attached .005.patch
{quote}Is the TimeoutException code path tested?{quote}
Added 2 test cases to cover this.
> RM Renew Delegation token thread should timeout and retry
> ---------------------------------------------------------
>
> Key: YARN-9768
> URL: https://issues.apache.org/jira/browse/YARN-9768
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: CR Hota
> Priority: Major
> Attachments: YARN-9768.001.patch, YARN-9768.002.patch,
> YARN-9768.003.patch, YARN-9768.004.patch, YARN-9768.005.patch
>
>
> Delegation token renewer thread in RM (DelegationTokenRenewer.java) renews
> HDFS tokens received to check for validity and expiration time.
> This call is made to an underlying HDFS NN or Router Node (which has exact
> APIs as HDFS NN). If one of the nodes is bad and the renew call is stuck the
> thread remains stuck indefinitely. The thread should ideally timeout the
> renewToken and retry from the client's perspective.
>
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