Hi,    bumping this thread as I'm seeing similar errors.   What is happening is these cloudera_manager_metastore_canary_test_db_hive_hivemetastore_**** databases keep propping up in our hive list, and we can't drop them directly in hive. If you attempt to drop them, the error message is " Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. must specify a non-null serDe".     What I need then to do is manually enter the metastore db and physically drop the tables with psql. This behaviour seems to be consistent and won't go away.    Are there any tests in CM that can be disabled to avoid this?  ... View more