Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/20029
> we can find the object org.apache.spark.sql.hive.client.HiveClientImpl
and org.apache.hadoop.hive.ql.session.SessionState keep increasing
Can you check the GC root and explain why they are increasing? The fix
looks not correct to me as we should create new session.
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