- Added Apache Kafka 4.2 support for MSK Express Brokers, including Eligible Leader Replicas enhancements, a new consumer rebalance protocol, and a Streams Rebalance Protocol.
- Enabled in‑place rolling upgrades with orchestrated broker restarts to maintain availability during version upgrades.
- Provides up to 3× higher throughput per broker, 20× faster scaling, and 90% faster recovery, bringing the latest open‑source performance improvements.
Amazon MSK Express Brokers adds support for Apache Kafka version 4.2
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