Github user yhuai commented on the issue:
https://github.com/apache/spark/pull/19448
I am not really worried about this particular change. It's already merged
and it seems a small and safe change. I am not planning to revert it.
But, in general, let's avoid of merging changes that are not bug fixes to a
maintenance branch. If there is an exception, it will be better to make it
clear earlier.
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