Github user woj-i commented on the pull request:
https://github.com/apache/spark/pull/9859#issuecomment-159052976
No It's not enough. Please look at the code of the method
UserGroupInformation.loginUserFromKeytab(args.principal, args.keytab). There is
a check of authentication type. If it's simple (what is default in the
classloader context) then parameters are not used. So that I think the recent
patch need this fix. I faced the situation I described. :)
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