KIP-670 — Add ConsumerGroupCommand to delete static members

Discussion AdminConsumer

Adds a `--remove-members` option (with `--member` or `--all-members`) to `kafka-consumer-groups.sh` that calls `AdminClient.removeMembersFromConsumerGroup()` from the command line. The `removeMembersFromConsumerGroup` API was introduced in Kafka 2.4 but had no CLI wrapper, requiring users to write Java code or use third-party tools to force-remove group members.

Protocol Impact

LeaveGroup

Details