KIP-3 — Mirror Maker Enhancement

Accepted Kafka 1.0 MirrorMaker

KIP-3 redesigns MirrorMaker to use `producer.send()` with a callback and defer consumer offset commits until producer acknowledgment, eliminating the data loss window between consumer commit and producer delivery. The original MirrorMaker committed consumer offsets before confirming producer delivery, so a crash between those two points silently dropped messages.

Details