Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/17387
@yaooqinn normally such a big behavior change requires design doc and well
discussion. It is not a good idea to push bunch of codes silently without any
discussion.
Besides, we're working on refactoring current credential mechanism to
support push tokens from external service and get rid of distribution of
keytab, please see
[SPARK-19143](https://issues.apache.org/jira/browse/SPARK-19143). I think after
that supporting kerberized services for standalone mode and others are much
more easier and straightforward.
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