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3.9.15

release-notes/3.9.15.md

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RabbitMQ 3.9.15 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

  • Stream delivery rate could drop if concurrent stream consumers consumed in a way that made them reach the end of the stream often.

    GitHub issue: #4371

  • If a cluster that had streams enabled was upgraded with a jump of multiple patch releases, stream state could fail an upgrade.

    GitHub issue: #4510

  • Significantly faster queue re-import from definitions on subsequent node restarts. Initial definition import still takes the same amount of time as before.

    GitHub issue: #4538

  • When a policy contained keys unsupported by a particular queue type, and later updated or superseded by a higher priority policy, effective optional argument list could become inconsistent (policy would not have the expected effect).

    Kudos to @jaroslaw-bochniak for providing very detailed reproduction steps.

    GitHub issue: #4463

  • Priority queues could run into an exception in some cases.

    Contributed by @luos and @olikasg.

    GitHub issue: #4405

  • Maintenance mode could run into a timeout during queue leadership transfer.

    Contributed by @felixhuettner.

    GitHub issue: #4468

Prometheus Plugin

Bug Fixes

  • Prometheus collector could run into an exception early on node's schema database sync.

    GitHub issue: #4376

Management Plugin

Bug Fixes

  • Connection data transfer rate units were incorrectly displayed when rate was less than 1 kiB per second.

    Contributed by @zgabi.

    GitHub issue: #4523

  • rabbitmqadmin now correctly loads TLS-related keys from its configuration file.

    Contributed by @fwolfsjaeger.

    GitHub issue: #4408

  • Corrected a help message for node memory usage tool tip.

    Contributed by @etc-crontab.

    GitHub issue: #4493

LDAP Plugin

Enhancements

  • More Erlang 24.3's eldap library compatibility improvements.

    GitHub issue: #4448

Dependency Upgrades

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.9.15.tar.xz instead of the source tarball produced by GitHub.