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https://issues.apache.org/jira/browse/YARN-8418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16562030#comment-16562030
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Bibin A Chundatt commented on YARN-8418:
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Thank you [~rohithsharma] for review
{quote}Why does token changed? It should be same during lifespan of application
right? IIUC, token will be renewed but not going to be changed right?
{quote}
Delegation token what we are talking about has a life span of 7 days (max-life
time) . So after 7 days we get new token.
Also for application that doesnt provide delegation token, RM will generate
one for user based on proxy enabled flag. {{RMDelegationTokenRenewer}}
{quote}
stale applications i.e which are completed from RM. In this case, token could
be cancelled before NM removes from its statestore which could lead problem
{quote}
Incase of application completed at RM. NodeStatus heartbeat response we do fire
application finish event rt ??
So Application finish should trigger -> Log aggregation StopApp ->which should
stop the Aggregator thread too. So you think that is not happening ?
> App local logs could leaked if log aggregation fails to initialize for the app
> ------------------------------------------------------------------------------
>
> Key: YARN-8418
> URL: https://issues.apache.org/jira/browse/YARN-8418
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.8.0, 3.0.0-alpha1
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Critical
> Attachments: YARN-8418.001.patch, YARN-8418.002.patch,
> YARN-8418.003.patch, YARN-8418.004.patch, YARN-8418.005.patch,
> YARN-8418.006.patch, YARN-8418.007.patch, YARN-8418.008.patch
>
>
> If log aggregation fails init createApp directory container logs could get
> leaked in NM directory
> For log running application restart of NM after token renewal this case is
> possible/ Application submission with invalid delegation token
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