- Upgrade to Erlang/OTP 21.3+ (20.3 dropped) and upgrade RabbitMQ before Erlang when moving from pre‑3.7.7 versions.
- Core server now retries peer discovery errors and adds initial Erlang/OTP 24 compatibility (backported).
- Federation plugin bug‑fix: graceful timeout handling and default interval raised to 90 seconds.
RabbitMQ 3.7.27
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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.