KIP-1361 — Change the default `auto.offset.reset` to `by_duration:PT5S`

Discussion ConsumerClient

Changes the consumer default `auto.offset.reset` from `latest` to `by_duration:PT5S`, so a partition with no committed offset resets to the offset five seconds in the past rather than to the log end. With `latest`, records written to partitions added by a topic expansion before the consumer's metadata refresh are silently skipped with no error, warning, or metric, and prior fixes (KIP-1282, KIP-1327) stalled on the complexity of new protocol-level reset policies.

Protocol Impact

Heartbeat

Details