Hi,   I've been trying to rebuild a CDH 5.8.3 cluster after removing kerberos authentication. Everything is working except the Hue service won't start. The error I'm getting in CM is:   Spark is not enabled Traceback (most recent call last): File "/usr/lib/hue/desktop/libs/notebook/src/notebook/connectors/spark_shell.py", line 38, in <module> from spark.conf import LIVY_SERVER_SESSION_KIND ImportError: No module named spark.conf   I've tried removing and reinstalling all of the hue packages, with no change.   Any ideas would be appreciated.   Thank you. ... View more