Apache Kafka 4.2.0 Released: Share Groups, Streams & More

What this post added

Introduces production-ready Kafka Queues (Share Groups) with RENEW acknowledgement, adaptive batching, and lag metrics. Kafka Streams gains GA server-side rebalance protocol, dead letter queue support, anchored wall-clock punctuation, and explicit control over leave group requests. Enhancements include standardized CLI arguments, corrected metric naming, new idle ratio metrics, an allowlist connector client configuration override policy, and thread-safety improvements to RecordHeader.