RabbitMQ - v3.12.4

RabbitMQ 3.12.4 is a maintenance release in the 3.12.x release series.

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 26.0.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 Server

Bug Fixes

• Consumer churn on quorum queues could result in some messages not being delivered
  to consumers in certain cases. This mostly affected queue federation links.

GitHub issue: #9059

Management Plugin

Bug Fixes

• Quorum queue replica management operations over the HTTP API now can be
  disabled. This can be useful in environments where replica management
  is done by the platform team and tooling, and should not be exposed to
  cluster users.

Contributed by @SimonUnge (AWS).

GitHub issue: #9151

Federation Plugin

Bug Fixes

• Queue federation links that connected quorum queues could get stuck
  (stop transferring messages even when there were no other consumers on the upstream).

GitHub issue: #9158

LDAP AuthN/AuthZ Backend Plugin

Bug Fixes

• LDAP plugin did not interpolate values with non-ASCII characters correctly.

GitHub issue: #9059

Dependency Upgrades

None in this release.

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.12.4.tar.xz
instead of the source tarball produced by GitHub.