KIP-411 — Make default Kafka Connect worker task client IDs distinct

Accepted Kafka 2.3 Connect

KIP-411 changes the default `client.id` for Kafka clients created by Connect worker tasks to include the connector name and task ID (e.g. `connector-consumer-conn1-2`), making per-task producer and consumer JMX MBeans uniquely named. Previously all tasks on a worker inherited the same default client ID, causing JMX MBean naming conflicts that made per-task metric collection impossible.

Details