Marcelo Vanzin created SPARK-26595:
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Summary: 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
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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