Merge pull request rabbitmq#10561 from rabbitmq/mk-3.12.13-release-notes

3.12.13 release notes

release-notes/3.12.13.md

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+RabbitMQ `3.12.13` is a maintenance release in the `3.12.x` [release series](https://www.rabbitmq.com/versions.html).
+This series [is covered](https://rabbitmq.com/versions.html) by community support through June 30, 2024 and extended commercial support through Dec 31, 2024.
+
+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 `26.2.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).
+
+
+### Core Broker
+
+#### Bug Fixes
+
+ * When a channel is closed, its consumer metric samples will now be cleared differently
+   depending on the number of them. In [#9356](https://github.com/rabbitmq/rabbitmq-server/pull/9356), it was over optimized for the uncommon case with
+   a very large number of consumers per channel, hurting the baseline case with one or a few consumers
+   per channel.
+
+   In part contributed by @SimonUnge (AWS).
+
+   GitHub issue: [#10478](https://github.com/rabbitmq/rabbitmq-server/pull/10478)
+
+
+### CLI Tools
+
+#### Enhancement
+
+ * CLI tool startup time was reduced.
+
+   GitHub issue: [#10461](https://github.com/rabbitmq/rabbitmq-server/pull/10461)
+
+#### Bug Fixes
+
+ * JSON output formatter now avoids ANSI escape sequences.
+
+   Contributed by @ariel-anieli.
+
+   GitHub issue: [#8557](https://github.com/rabbitmq/rabbitmq-server/issues/8557)
+
+ * ANSI escape sequences are no longer used on Windows.
+
+   Contributed by @ariel-anieli.
+
+   GitHub issue: [#2634](https://github.com/rabbitmq/rabbitmq-server/issues/2634)
+
+
+### Stream Plugin
+
+#### Bug Fixes
+
+ * If a stream publisher cannot be set up, a clearer message will be logged.
+
+   GitHub issue: [#10524](https://github.com/rabbitmq/rabbitmq-server/pull/10524)
+
+
+### Management Plugin
+
+#### Bug Fixes
+
+ * `GET /api/nodes/{name}` failed with a 500 when called with a non-existed node name.
+
+   GitHub issue: [#10330](https://github.com/rabbitmq/rabbitmq-server/issues/10330)
+
+
+### Shovel Plugin
+
+#### Bug Fixes
+
+ * AMQP 1.0 Shovels will no longer set a delivery mode header that is not meaningful in AMQP 1.0.
+
+   Contributed by @luos (Erlang Solutions).
+
+   GitHub issue: [#10503](https://github.com/rabbitmq/rabbitmq-server/pull/10503)
+
+
+### Federation Plugin
+
+#### Bug Fixes
+
+ * Upstream node shutdown could produce a scary looking exception in the log.
+
+   GitHub issue: [#10473](https://github.com/rabbitmq/rabbitmq-server/pull/10473)
+
+ * Exchange federation links could run into an exception.
+
+   Contributed by @gomoripeti (CloudAMQP).
+
+   GitHub issue: [#10305](https://github.com/rabbitmq/rabbitmq-server/pull/10305)
+
+
+### Dependency Changes
+
+ * `cowboy` was updated to [`2.11.0`](https://ninenines.eu/docs/en/cowboy/2.11/guide/migrating_from_2.10/)
+
+## Source Code Archives
+
+To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.12.13.tar.xz`
+instead of the source tarball produced by GitHub.