RabbitMQ - v3.9.22

RabbitMQ 3.9.22 is a maintenance release in the 3.9.x release series.

Please refer to the Upgrading to 3.9 section from v3.9.0 release notes if upgrading from a version prior to 3.9.0.

This release requires at least Erlang 24.x, and supports Erlang 25. RabbitMQ and Erlang/OTP Compatibility Matrix has more details on Erlang version requirements for RabbitMQ.

Changes Worth Mentioning

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

Core Server

Enhancements

• In environments where DNS resolution is not yet available at the time RabbitMQ nodes boot and try to perform peer discovery,
  such as CoreDNS with default caching interval of 30s on Kubernetes, nodes now will retry
  hostname resolution (including of their own host) several times with a wait interval.

The recommended solution is to decrease CoreDNS caching interval.

GitHub issue: #5335

Bug Fixes

• Reduce log noise when sysctl cannot be accessed by node memory monitor.

GitHub issue: #5260

Prometheus Plugin

Enhancements

• Prometheus plugin now exposes one more metric, process_start_time_seconds, the moment of node process
  startup in seconds.

GitHub issue: #4539

Shovel plugin

Bug Fixes

• Shovels now handle consumer delivery timeouts gracefully and restart.

Contributed by @Haster2004.

GitHub issue: #5243

Dependency Upgrades

None in this release.

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.9.22.tar.xz
instead of the source tarball produced by GitHub.