RabbitMQ - v3.9.14

RabbitMQ 3.9.14 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 23.2, and supports Erlang 24. RabbitMQ and Erlang/OTP Compatibility Matrix has more details on Erlang version requirements for RabbitMQ.

Changes Worth Mentioning

Release notes are kept under rabbitmq-server/release-notes.
Contributors are encouraged to update them together with their changes. This helps with release automation and a more consistent release schedule.

Core Server

Bug Fixes

• Restart of a node that hosted one or more stream leaders resulted in
  their consumers not "re-attaching" to the newly elected leader.

GitHub issue: #4133

• Large fanouts experienced a performance regression when streams were not
  enabled using a feature flag.

GitHub issue: #4086

• Stream management plugin did not support mixed version clusters.

GitHub issue: #4082

• Stream deletion did not result in a basic.cancel being sent to AMQP 0-9-1 consumers.

GitHub issue: #4192

• Stream clients did not receive a correct stream unavailability error in some
  cases.

GitHub issue: #4117

• It is again possible to clear user tags and update the password in a single operation.

GitHub issue: #4126

Enhancements

• Forward compatibility with Erlang 25.

GitHub issue: #4256

• File handle cache efficiency improvements.

  Contributed by @felixhuettner.

  GitHub issue: #4324

• Uknown stream properties (e.g. those requested by a node that runs a newer version)
  are now handled gracefully.

GitHub issue: #4090

• Temporary hostname resolution issues (attempts that fail with nxdomain)
  are now handled more gracefully and with a delay of several seconds.

GitHub issue: #4233

• Build time compatibility with Elixir 1.13.

GitHub issue: #4019

OAuth 2 AuthN/AuthZ Backend Plugin

Bug Fixes

• auth_oauth2.additional_scopes_key in rabbitmq.conf was not converted correctly
  during configuration translation and thus had no effect.

Contributed by @luos.

GitHub issue: #4105

LDAP AuthN/AuthZ Backend Plugin

Enhancement

• Adapt to a breaking Erlang 24.3 LDAP client change.

GitHub issue: #4287

Shovel Plugin

Enhacements

• Shovels now can be declared with delete-after parameter set to 0.
  Such shovels will immediately stop instead of erroring and failing to
  start after a node restart.

Contributed by @luos.

GitHub issue: #4101

Consul Peer Discovery Plugin

Enhancements

• Support for Consul 1.1 response code changes
  when an operation is attempted on a non-existent health check.

Suggested by @maestroes.

GitHub issue: #4155

Dependency Upgrades

• Ra was upgraded to 2.0.4
• gen_batch_server was upgraded to 0.8.7

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.9.14.tar.xz
instead of the source tarball produced by GitHub.