KIP-1284 — Introduce CloseOptions.DEFAULT for Kafka Streams

Discussion Streams

Introduces CloseOptions.DEFAULT as an explicit enum value for KafkaStreams.close() that selects the correct shutdown behavior based on the active rebalance protocol (LEAVE_GROUP for the Streams Protocol, REMAIN_IN_GROUP for Classic). Without this, KafkaStreams.close() with no CloseOptions implicitly uses REMAIN_IN_GROUP, which is semantically wrong for the KIP-1071 Streams Protocol where dynamic membership makes remaining in the group after shutdown counterproductive.

Details