RabbitMQ 3.12.14

RabbitMQ 3.12.14 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

• Quorum queues are now more defensive when acquiring file handles.

  GitHub issue: #10587

Enhancements

• There is now a way to configure default queue type globally (that is, not per virtual host)
  in rabbitmq.conf:

  # Built-in type aliases are "quorum", "classic", "stream"
  default_queue_type = quorum

  Contributed by @SimonUnge.

  GitHub issue: #11165

• channel_max_per_node is a new per-node limit that allows to put a cap on the number
  of AMQP 0-9-1 channels that can be concurrently open by all clients connected to a node:

  # rabbitmq.conf
  channel_max_per_node = 5000

  This is a guardrail mean to protect nodes from application-level channel leaks.

  Contributed by @illotum.

  GitHub issue: #10754

• Definition import did not handle a scenario where some virtual hosts did not have
  the default queue type metadata key set.

  GitHub issue: #10897

AMQP 1.0 Plugin

Bug Fixes

• Safer AMQP 1.0 => AMQP 0-9-1 message durability property conversion.

  GitHub issue: #10568

Management Plugin

Bug Fixes

• When a tab (Connections, Queues and Streams, etc) is switched, a table configuration pane
  from the previously selected tab is now hidden.

  Contributed by @ackepenek.

  GitHub issue: #10799

JMS Topic Exchange Plugin

Enhancements

• The plugin now stores its state on multiple nodes.

  GitHub issue: #11098

Dependency Changes

• cowboy was updated to 2.12.0

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.12.14.tar.xz
instead of the source tarball produced by GitHub.