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3.9.14

release-notes/3.9.14.md

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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

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.