KIP-1206 — Strict max fetch records in share fetch

Accepted Kafka 4.2 Consumer

Changes the maxFetchRecords limit in ShareFetch from a soft limit (batch-boundary aligned) to a strict record-count limit, ensuring the number of records returned never exceeds the configured value. The soft limit caused unpredictable batch sizes for share consumers with long per-record processing times, leading to frequent acquisition lock timeouts and uncontrolled redelivery.

Protocol Impact

ShareFetch v2 · Fetch

Details