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https://issues.apache.org/jira/browse/FLINK-37378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17930325#comment-17930325
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slankka edited comment on FLINK-37378 at 2/25/25 12:57 PM:
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Thanks to [dinchamion (Greg 'Dinchamion' Fazekas) ·
GitHub|https://github.com/dinchamion]
He's PR in Cloudera repo points out the important renewer configuration.
but it's unfair [~gaborgsomogyi] to close my Jira ticket. I even did not
create pr for Flink.
I just provide information for any one who are facing the same problem.
was (Author: adrian z):
Thanks to [dinchamion (Greg 'Dinchamion' Fazekas) ·
GitHub|https://github.com/dinchamion]
He's PR in Cloudera repo points out the important renewer configuration.
but it's unfair to close my Jira ticket. I even did not create pr for Flink.
I just provide information for any one who are facing the same problem.
> Yarn log aggregation fails with Kerberos DT issues
> --------------------------------------------------
>
> Key: FLINK-37378
> URL: https://issues.apache.org/jira/browse/FLINK-37378
> Project: Flink
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 2.0.0, 2.1.0
> Reporter: slankka
> Priority: Major
> Labels: docuentation
>
> Thanks to [~gaborgsomogyi] , he created FLINK-28608, we found it is helpful
> to solve log aggregation failure of long running flink on yarn applications.
> So I suggest that the configuation of token provider renewer should be
> documented.
> It's difficult to prove, but still have a way to verify this.
> {code:java}
> dfs.namenode.delegation.key.update-interval 86400000 (1 day) # change to
> 180000 3min
> dfs.namenode.delegation.token.max-lifetime 604800000 (7 days) # change to
> 360000 5min
> dfs.namenode.delegation.token.renew-interval 86400000 (1 day) # change to
> 180000 3min {code}
>
> normally after 7 days( by default), you will find Yarn log aggregation status
> is TIMEDOUT.
> It's no matter what release of hadoop we are using. (Apache Hadoop 3.3.6 in
> fact.)
>
> *How we found the problem?*
> The log aggregation success log example (Flink-1.13.0):
> {code:java}
> token for xxxx: HDFS_DELEGATION_TOKEN owner=xxxx/[email protected],
> renewer=yarn, realUser=, issueDate=1739273095368, maxDate=1739877895368{code}
> The failed example (Flink-1.17.0):
> {code:java}
> token for xxxx: HDFS_DELEGATION_TOKEN owner=xxxx/[email protected],
> renewer=, realUser=, issueDate=1739953940508, maxDate=1739954300508 {code}
>
> *Solution we found*
> If flink deploys on Yarn, this configuration is important to keep Yarn log
> aggregation works after Flink job terminated（FAILED, FINSHED,KiLLED) since
> started for 7 days.
> it's not configured by default. If flink runs for 7 days, without this conf,
> yarn log aggregation fails.
> {code:java}
> # since Flink-1.16
> security.kerberos.token.provider.%s.renewer
> # if deploys on Yarn
> security.kerberos.token.provider.hadoopfs.renewer: yarn {code}
>
> BTW, we also found that people [dinchamion (Greg 'Dinchamion' Fazekas) ·
> GitHub|https://github.com/dinchamion] (not me) in cloudera points out the
> importance of this at Links, but he did not create a pull request yet.
> Proof link:
> [https://github.com/cloudera/flink-tutorials/pull/44]
>
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