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rabbitmq-server/release-notes/3.12.12.md

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RabbitMQ 3.12.12 is a maintenance release in the 3.12.x release series.

This release goes out of community support on June 1st, 2024.

Please refer to the upgrade section from the 3.12.0 release notes if upgrading from a version prior to 3.12.0.

This release requires Erlang 25 and supports Erlang versions up to 26.2.x. RabbitMQ and Erlang/OTP Compatibility Matrix has more details on Erlang version requirements for RabbitMQ.

Minimum Supported Erlang Version

As of 3.12.0, RabbitMQ requires Erlang 25. Nodes will fail to start on older Erlang releases.

Users upgrading from 3.11.x (or older releases) on Erlang 25 to 3.12.x on Erlang 26 (both RabbitMQ and Erlang are upgraded at the same time) must consult the v3.12.0 release notes first.

Changes Worth Mentioning

Release notes can be found on GitHub at rabbitmq-server/release-notes.

Core Broker

Bug Fixes

  • Environments with a lot of quorum queues could experience a large Erlang process build-up. The build-up was temporary but with a sufficiently large number of quorum queues it could last until the next round of periodic operations, making it permanent and depriving the node of CPU resources.

    GitHub issue: #10242

  • RabbitMQ core failed to propagate more authentication and authorization context, for example, MQTT client ID in case of MQTT connections, to authN and authZ backends. This was not intentional.

    GitHub issue: #10230

  • Nodes now takes more precaution about persisting feature flag state (specifically the effects of in-flight changes) during node shutdown.

    GitHub issue: #10279

Enhancements

  • Simplified some type specs.

    Contributed by @ariel-anieli.

    GitHub issue: #10228

Stream Plugin

MQTT Plugin

Bug Fixes

  • Recovering connections from QoS 0 consumers (subscribers) could fail if they were previously connected to a failed node.

    GitHub issue: #10252

CLI Tools

Bug Fixes

  • Since #10131 (shipped in 3.12.11), some CLI commands in certain scenarios could fail to accept input via standard output.

    GitHub issues: #10270, #10258

AWS Peer Discovery Plugin

Enhancements

  • Updated some type specs.

    Contributed by @ariel-anieli.

    GitHub issue: #10226

Dependency Upgrades

None in this release.

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.12.12.tar.xz instead of the source tarball produced by GitHub.