- Upgrade requires Erlang 24.2+; older Erlang versions will not start (breaking change).
- Multiple core and plugin bug fixes: Kubernetes rolling upgrade hang, mixed‑version cluster channel errors, quorum queue consumer race, Unicode path handling, disk‑space monitor resilience, AMQP 1.0 and Shovel plugin issues.
- Enhanced diagnostics observer with classic queue metrics and Unicode‑aware logging.
RabbitMQ 3.10.9
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Core server bug fixes: duplicate direct‑reply deliveries, quorum queue recovery issues, malformed AMQP 1.0 frames, topic‑exchange wildcard limits, and OAuth proxy header handling.