Hi,   are you trying to run spark-shell or pyspark on a node where the Spark Gateway is not installed by any chance? The classes should come from a JAR file called spark-hive_<version>.jar on the host in the dir /opt/cloudera/parcels/CDH/jars Could you check if that exists? Could you tell a bit more about what kind of jobs you are trying to run and from where?   Regards, Zsombor ... View more