Kafka UnknownMemberIdException: Why It Happens and How to Fix It
Kafka UnknownMemberIdException — 'The coordinator is not aware of this member' (code 25). Learn the three triggers, the memberId lifecycle, and the exact fix.
consumer-groups
3 PostsKafka InvalidGroupIdException: Fixing the group.id Error
Hitting InvalidGroupIdException: "you must provide a valid group.id"? Why subscribe() and offset commits require a group.id in Kafka, and the exact fix.
Kafka: Marking the Coordinator Dead — Causes and Fix
Kafka consumer stuck logging 'Marking the coordinator dead' / 'Group coordinator is unavailable or invalid, will attempt rediscovery'. Here's the real cause and the fix.