KIP-1269 — Configurable number of batches to retain in broker

Discussion BrokerProducer

Introduces a configurable broker-side limit on the number of producer batch sequence numbers retained for idempotent deduplication, replacing the hardcoded constant ProducerStateEntry#NUM_BATCHES_TO_RETAIN (currently 5). This hardcoded value forces max.in.flight.requests.per.connection to be ≤5 for idempotent producers, artificially limiting producer throughput.

Protocol Impact

Produce · InitProducerId

Details