RabbitMQ - v3.11.20

RabbitMQ 3.11.20 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 and supports Erlang versions up to 25.3.x.
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

• Fixed a potential resource leak in at-least-once dead lettering from quorum queues.

GitHub issue: #8799

CLI Tools

Enhancements

• A new command, rabbitmqctl deactivate_free_disk_space_monitoring, can be used to (temporarily or permanently) disable
  free disk space monitoring on a node.

To re-activate it, use rabbitmqctl activate_free_disk_space_monitoring.

GitHub issue: #8801

AMQP 1.0 Plugin

Bug Fixes

• AMQP 1.0 clients that try to publish in a way that results in the message not being routed
  anywhere are now notified with a more sensible settlement status.

GitHub issue: #7823

Prometheus Plugin

Enhancements

• Prometheus scraping API endpoints now support optional authentication.

Contributed by @SimonUnge (AWS).

GitHub issue: #8683

• The plugin now filters out values that are undefined or NaN, simply excluding
  them from the API endpoint response.

Previously, if a metric was not computed for any reason (e.g. free disk space monitor
was disabled on the node), its value could end up being rendered as undefined or NaN,
two values that Prometheus scrapers cannot handle (for numerical types such as gauges).

GitHub issue: #8660

Management Plugin

Bug Fixes

• It was not possible to close a table column selection pane on
  screens that had little vertical space.

Contributed by @Antsthebul.

GitHub issue: #8701

Dependency Upgrades

• ra was upgraded to 2.6.3

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.11.20.tar.xz
instead of the source tarball produced by GitHub.