RabbitMQ 3.11.2

RabbitMQ 3.11.2 is a maintenance release in the 3.11.x release series.

Please refer to the upgrade section from v3.11.0 release notes
if upgrading from a version prior to 3.11.0.

This release requires Erlang 25.
RabbitMQ and Erlang/OTP Compatibility Matrix has more details on
Erlang version requirements for RabbitMQ.

Minimum Supported Erlang Version

As of 3.11.0, RabbitMQ requires Erlang 25. Nodes will fail to start on older Erlang releases.

Erlang 25 as our new baseline means much improved performance on ARM64 architectures, profiling with flame graphs
across all architectures, and the most recent TLS 1.3 implementation available to all RabbitMQ 3.11 users.

Changes Worth Mentioning

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

Core Server

Bug Fixes

• Partially reverts an unsafe inter-node communication optimization that could affect
  classic mirrored queue operation ordering.

  Kudos to @bording for providing an automated way to reproduce the issue.

  GitHub issue: #6115

• Classic mirrored queue leader replica issued to much credit to follower replicas,
  resulting in an uneven load and memory footprint between them.

  GitHub issue: #6110

• Intra-cluster communication link metric collector could run into an exception when
  peer connection has just been re-established, e.g. after a peer node restart.

  GitHub issue: #6127

MQTT Plugin

Bug Fixes

• When a node was put into maintenance mode, it closed all MQTT client connections
  cluster-wide instead of just local client connections.

  GitHub issue: #6108

Dependency Upgrades

None in this release.

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.11.2.tar.xz
instead of the source tarball produced by GitHub.