Amazon MQ deployed RabbitMQ version 4.3 support, which introduces improvements primarily to quorum queues: data compaction to reduce disk usage, increase from 2 to 32 strict priority levels, native delayed retry mechanisms for failed messages, and per-queue consumer timeout configurations moved from global protocol channels. These features enhance reliability, performance, and message handling flexibility. RabbitMQ 4.3 also includes memory management optimizations and bug fixes, with discontinued support for transient non-exclusive queues and classic queue v1 storage.
The RabbitMQ 4.3 brokers on Amazon MQ are managed services available in regions supporting m7g instance types. Amazon MQ manages patch upgrades automatically, and users select version during broker creation. These released features represent a deployed messaging platform upgrade improving capabilities for distributed applications.
Source & further reading
Amazon MQ now supports RabbitMQ 4.3 ↗Source published 2026-09-10. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.