- Fixed multiple quorum‑queue bugs (recovery loops, dead‑lettering, backlog handling, and corrupted vhost recovery) and optimized GC scheduling;
- Introduced graceful shutdown on SIGTERM, a persistent internal cluster ID, faster boot steps, new health‑check hooks for upgrades, and several management API enhancements (POST /login, /rebalance/queues, CSP headers);
- Removed “if unused”/“if empty” options from quorum‑queue deletion and made other API changes that may break existing scripts
RabbitMQ 3.8.3
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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.