KIP-333 — Add faster mode of rebalancing

Discussion Consumer

Proposes a fast-path rebalance mechanism for consumers that are returning from failure, allowing them to resume from their last committed offset rather than waiting for a full group rebalance to complete. After a crash and restart, the standard rebalance protocol introduces a lag proportional to the gap between the last committed offset and the current LEO, which is unacceptable for low-latency applications.

Protocol Impact

JoinGroup · LeaveGroup

Details