Merge pull request #9927 from rabbitmq/mk-3.12.9-release-notes

3.12.9 release notes

Author: michaelklishin

release-notes/3.12.9.md

@@ -0,0 +1,87 @@
+RabbitMQ `3.12.9` is a maintenance release in the `3.12.x` [release series](https://www.rabbitmq.com/versions.html).
+
+Please refer to the upgrade section from the [3.12.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.12.0)
+if upgrading from a version prior to 3.12.0.
+
+This release requires Erlang 25 and supports Erlang versions up to `26.1.x`.
+[RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/which-erlang.html) has more details on
+Erlang version requirements for RabbitMQ.
+
+
+### Minimum Supported Erlang Version
+
+As of 3.12.0, RabbitMQ requires Erlang 25. Nodes **will fail to start** on older Erlang releases.
+
+Users upgrading from 3.11.x (or older releases) on Erlang 25 to 3.12.x on Erlang 26
+(both RabbitMQ *and* Erlang are upgraded at the same time) **must** consult
+the [v3.12.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.12.0) first.
+
+
+## Changes Worth Mentioning
+
+Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.12.x/release-notes).
+
+
+### Shovel Plugin
+
+#### Bug Fixes
+
+ * Shovels on `3.12.8` nodes failed during a rolling cluster upgrade due to internal
+   identifier format changes.
+
+   Starting with this release, both old and new formats are supported for upgrade safety.
+
+   GitHub issue: [#9894](https://github.com/rabbitmq/rabbitmq-server/pull/9894)
+
+
+### Grafana Dashboard
+
+#### Enhancements
+
+ * [Global counters for producers](https://github.com/rabbitmq/rabbitmq-server/pull/3127) are now available in the dashboard.
+
+   Contributed by @johanrhodin (CloudAMQP)
+
+   GitHub issue: [#9846](https://github.com/rabbitmq/rabbitmq-server/pull/9846)
+
+
+### MQTT Plugin
+
+#### Bug Fixes
+
+ * Avoids an unnecessary warning in the logs.
+
+   GitHub issue: [#9885](https://github.com/rabbitmq/rabbitmq-server/pull/9885)
+
+
+### CLI Tools
+
+#### Enhancements
+
+ * `rabbitmq-diagnostics list_policies_that_match [queue name]` is a new command
+   that simplifies troubleshooting of policy conflicts.
+
+   GitHub issue: [#9916](https://github.com/rabbitmq/rabbitmq-server/pull/9916)
+
+
+### Management Plugin
+
+#### Enhancements
+
+ * Nodes that have OAuth 2 enabled now redirect the user to the original landing page (if any)
+   after successful login with the IDP.
+
+   Contributed by @dukex.
+
+   GitHub issue: [#9851](https://github.com/rabbitmq/rabbitmq-server/pull/9851)
+
+
+## Dependency Upgrades
+
+None in this release.
+
+
+## Source Code Archives
+
+To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.12.9.tar.xz`
+instead of the source tarball produced by GitHub.