KUP-04200
unable to connect to Kafka 'cluster': string
Cause
An attempt to create a connection to a Kafka 'cluster' failed.
Action
Check the status of the Kafka 'cluster' associated with the DBMS_KAFKA application by calling DBMS_KAFKA_ADM.CHECK_CLUSTER. Common failures include a bad bootstrap_servers argument or security information if connected to a secure Kafka 'cluster'.