- Added a new maintenance mode for RabbitMQ nodes with CLI commands (upgrade drain, revive, suspend/resume listeners) to simplify rolling upgrades.
- Fixed several bugs: MQTT plugin process leak, Management plugin slow activation on high‑disk nodes, and refined OAuth2 scope merging.
- Updated dependencies (cuttlefish) and clarified Erlang compatibility (last version supporting Erlang 21.3, compatible with Erlang 23).
RabbitMQ 3.8.8
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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.