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Amazon MSK Express Brokers adds support for Apache Kafka version 4.2

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This article announces Apache Kafka version 4.2 support for Amazon MSK Express Brokers, bringing enhanced reliability and performance improvements.

  • Eligible Leader Replicas (ELR) enhancements strengthen availability with improved leader election correctness
  • New consumer rebalance protocol enables smoother and faster group rebalances
  • New Streams Rebalance Protocol extends broker coordination to Kafka Streams for optimized task assignments
  • MSK Express Brokers deliver 3x more throughput per broker and 90% faster recovery time
  • Deploy version 4.2.x when creating new clusters or upgrade existing clusters with in-place rolling updates
  • Available across all AWS regions where MSK Express Brokers is offered

Kafka 4.2 support brings latest open-source reliability and performance improvements to MSK Express, available immediately.



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