Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/22494
This PR is a no-op if users don't turn off #20023 . The benefit of this PR
is: before we fully fix that bug, if a user hit it, he can turn off #20023 to
temporarily work around it. So I don't see any harm of this PR.
Turning off #20023 by default is another story and I'd like to get more
feedback before doing it.
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