I was playing with SCC & Spark 3.0.1, and noticed that I can't finish my work clearly - the Spark session just hangs with following errors, and even Ctrl-C doesn't help:
spark-sql was started with following command
This happens also for Spark 3.0.0. Only spark-sql is affected, spark-shell works fine for both versions.
set spark.cassandra.connection.keepAliveMS to 0
Apparently hive closes the class loader responsible for loading these classes.