Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/22614
As @tejasapatil suggested above, this fallback is not suggested to be on in
a prod setting. It could also impact the system health (e.g., the other
concurrent queries that are querying the same Hive metastore could be blocked).
Thus, I would suggest to make the new conf as internal and make the
configuration description more clear regarding the impact of this fallback.
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