RabbitMQ 4.0.9

RabbitMQ 4.0.9 is a maintenance release in the 4.0.x release series.

Starting June 1st, 2024, community support for this series will only be provided to regularly contributing users and those
who hold a valid commercial support license.

It is strongly recommended that you read 4.0 release notes
in detail if upgrading from a version prior to 4.0.0.

Minimum Supported Erlang Version

This release requires Erlang 26 and supports Erlang versions up to 27.3.x.
RabbitMQ and Erlang/OTP Compatibility Matrix has more details on
Erlang version requirements for RabbitMQ.

Nodes will fail to start on older Erlang releases.

Changes Worth Mentioning

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

Core Server

Enhancements

• Khepri: improved compatibility in mixed (Khepri) version clusters.

  GitHub issue: #13695

Management Plugin

Enhancements

• It is now possible to require authentication for the HTTP API reference page
  accessible at /api:

  management.require_auth_for_api_reference = true

  GitHub issue: #13715

Federation Plugin

Bug Fixes

• Federation status command and HTTP API endpoint could run into an exception.

  GitHub issue: #13711

AMQP 1.0 Erlang Client for RabbitMQ

Bug Fixes

• Concurrent queue declarations could fail with an exception.

  GitHub issue: #13732

Dependency Changes

• osiris was updated to 1.8.7
• khepri_mnesia_migration was upgraded to 0.7.2

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-4.0.9.tar.xz
instead of the source tarball produced by GitHub.