Github user tgravescs commented on the issue:
https://github.com/apache/spark/pull/19227
just to throw my 2 cents in, I agree with Vanzin that its not secure but at
the same time there are probably use cases its ok. If people have a standalone
cluster they have secured off for only a set of users and they all run under a
single user, having access to secure HDFS is still very useful. A true
multi-tenant standalone cluster is not a good use case. Personally I think if
we want to support that its enough to fix just being kinit'd first and not
shipping keytabs around. This used to work back in the early 1.x days. A few
users have asked for this in the past, not sure current use case. I don't have
a strong opinion on it though either.
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