RabbitMQ 3.9.9

[michaelklishin]

RabbitMQ 3.9.9 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 the latest Erlang 24 version, 24.1.2 at the time of release. 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

• Fixed an issue where node monitor could produce a false network partition when
  one of the cluster members was restarted

  GitHub issue: #3631

• Message store resiliency improvements

  GitHub issue: #3615

• Reduced log noise in certain scenarios where a new queue leader is elected

  GitHub issue: #3628

• Queue leader rebalancing now logs less

  GitHub issue: #3643

Enhancements

• cluster_formation.target_cluster_size_hint is a new configuration setting that can be used to specify expected initial cluster size.
  This can be used by features, plugins or tools that expect a certain minimum number of clusters nodes
  to join during initial cluster formation

  GitHub issue: #3635

Prometheus Plugin

Enhancements

• Metric rendering efficiency improvements (mostly latency)

  GitHub issue: #3587

Bug Fixes

• TLS-enabled Prometheus endpoint listener port was not correctly stored internally

  GitHub issue: #2975

Management Plugin

Bug Fixes

• Persistent message count is now displayed correctly on individual queue pages

  GitHub issue: #3598

• Restore compatibility with IE 11

  GitHub issue: #3689

Consistent Hashing Exchange Plugin

Bug Fixes

• Corrected deletion of duplicate bindings between an exchange and a queue

  Contributed by @FalconerTC

  GitHub issue: #3594

Dependency Upgrades

• Ra was upgraded to 2.0.2

• Osiris was upgraded to 1.2.3

Source Code Archives

To obtain source code of the entire distribution, please download the archive named rabbitmq-server-3.9.9.tar.xz
instead of the source tarball produced by GitHub.

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This discussion was created from the release RabbitMQ 3.9.9.