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https://issues.apache.org/jira/browse/YARN-9768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16940115#comment-16940115
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Manikandan R commented on YARN-9768:
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[~inigoiri] Thanks for review. Sorry, There was some problem in eclipse
formatter. Fixed.
Addressed almost all comments. Regarding sleeps, since there are multiple
retries with fixed interval, sleeping helps in ensuring max retry attempts has
been exhausted.
> 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
>
>
> 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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