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https://issues.apache.org/jira/browse/SPARK-26595?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcelo Vanzin resolved SPARK-26595.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 23525
[https://github.com/apache/spark/pull/23525]
> Allow delegation token renewal without a keytab
> -----------------------------------------------
>
> Key: SPARK-26595
> URL: https://issues.apache.org/jira/browse/SPARK-26595
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: Marcelo Vanzin
> Assignee: Marcelo Vanzin
> Priority: Major
> Fix For: 3.0.0
>
>
> Currently the delegation token renewal feature requires the user to provide
> Spark with a keytab.
> It would be nice for this to also be supported when the user doesn't have a
> keytab, as long as the user keeps a valid kerberos login. Spark has access to
> the user's credential cache in that case, and can keep tokens updated much
> like in the keytab case.
> It's not as automatic as with keytabs, but can help in some environments.
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