Fixed Issues in Apache Kafka

Review the list of Kafka issues that are resolved in Cloudera Runtime 7.1.5.

CDPD-17921: advertised.listeners should allow duplicated ports (KAFKA-10478 backport)

This is a backported fix. The advertised.listeners Kafka property now accepts duplicated ports.

OPSAPS-58319: Kafka metrics may have been wiped after a Kafka cluster restart

Empty responses are now properly handled when topic names are fetched. Kafka metrics will no longer be wiped.

CDPD-11775: Kafka Connect does not start due to occupied ports

The default ports for the Kafka Connect role are updated to be in the non-ephemeral range. This resolves possible port binding issues that can cause Kafka connect to not start.