KIP-343 — Add a Controller Heartbeat Mechanism

Discussion Broker

Proposes a controller heartbeat mechanism where brokers periodically ping the active controller and mark themselves as controller-partitioned if heartbeats fail, refusing to serve as leader for new partitions. A broker that can reach ZooKeeper but not the controller continues to believe it holds partition leadership, leading to metadata divergence and split-brain scenarios.

Protocol Impact

Heartbeat

Details