Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/21060 How about we formally document that in the guide? I have been always putting more importance on practice and I personally think we are fine to make a backport if it's a bug and the fix is straightforward. IMHO, principal is a base but we should put more importance on practice. Even if I take your words, I would then like to make this as an exception since this fixes actual usecases from our customers.
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