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3.9.28 release notes

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Michael Klishin 2023-01-15 09:32:28 -06:00
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RabbitMQ `3.9.28` is a maintenance release in the `3.9.x` release series.
This series [**reaches end of general support** on Jan 31st, 2023](https://rabbitmq.com/versions.html).
Please refer to the **Upgrading to 3.9** section from [v3.9.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.9.0)
if upgrading from a version prior to 3.9.0.
This release requires at least Erlang 24.3, and supports Erlang 25.
[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
Erlang 23 support has reached its [end of support](https://www.rabbitmq.com/which-erlang.html).
Starting with this release, RabbitMQ requires Erlang 24.3 or later versions. Nodes **will fail to start** on older Erlang releases.
## Changes Worth Mentioning
Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.9.x/release-notes).
### Core Server
#### Enhancements
* Preserve additional information in the log message when heartbeat frame cannot
be sent due to a TCP timeout.
GitHub issue: [#6708](https://github.com/rabbitmq/rabbitmq-server/pull/6708)
### CLI Tools
#### Bug Fixes
* `rabbitmqctl add_vhost` now coerces a single string value of `--tags` into an array.
GitHub issue: [#6877](https://github.com/rabbitmq/rabbitmq-server/pull/6877)
### Web STOMP Plugin
#### Bug Fixes
* `ERROR` frames delivery is now correctly delivered w.r.t. TCP connection closure for clients that run into
certain types of exceptions.
Contributed by @csicar.
GitHub issue: [#6789](https://github.com/rabbitmq/rabbitmq-server/pull/6789)
## Dependency Upgrades
* `ra` was upgraded [from `2.4.5` to `2.4.6`](https://github.com/rabbitmq/ra/releases)
* `prometheus.erl` was upgraded [from `4.9.1` to `4.10.0`](https://github.com/deadtrickster/prometheus.erl/tags)
## Dependency Upgrades
None in this release.
## Source Code Archives
To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.9.27.tar.xz`
instead of the source tarball produced by GitHub.