Github user wangyum commented on the issue:
https://github.com/apache/spark/pull/20944
Sorry @HyukjinKwon It's difficult reproduce. I am not sure whether it is
caused by multithreading.
But you can verify it by:
https://github.com/apache/spark/blob/a75571b46f813005a6d4b076ec39081ffab11844/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveExternalCatalogSuite.scala#L117-L120
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