108 lines
4.1 KiB
Markdown
108 lines
4.1 KiB
Markdown
RabbitMQ `3.9.12` is a maintenance release in the `3.9.x` release series.
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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.
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This release requires at least Erlang 23.2, and supports Erlang 24. [RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/which-erlang.html) has more details on Erlang version requirements for RabbitMQ.
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## Changes Worth Mentioning
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Release notes are kept under [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.9.x/release-notes).
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Contributors are encouraged to update them together with their changes. This helps with release automation and a more consistent release schedule.
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### Core Server
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#### Bug Fixes
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* Work around a slow [Windows-specific memory leak in Erlang's `file:read_file/1`](https://github.com/erlang/otp/issues/5527).
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GitHub issues: [#3936](https://github.com/rabbitmq/rabbitmq-server/pull/3936), [#3906](https://github.com/rabbitmq/rabbitmq-server/pull/3906)
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* `log.file.rotation.date` pattern parser now supports more values and is closer to Lager in
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RabbitMQ 3.7 and earlier releases.
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GitHub issue: [#3831](https://github.com/rabbitmq/rabbitmq-server/issues/3831)
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* User limits were ignored by definition import.
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GitHub issue: [#3458](https://github.com/rabbitmq/rabbitmq-server/issues/3458)
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* Stream coordinator could run into an exception in some scenarios.
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GitHub issue: [#3908](https://github.com/rabbitmq/rabbitmq-server/pull/3908)
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* On node shutdown, stopped applications were unintentionally logged at the error level.
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GitHub issue: [#3900](https://github.com/rabbitmq/rabbitmq-server/issues/3900)
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#### Enhancements
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* `basic.*` AMQP 0-9-1 operations now consume fewer CPU cycles.
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GitHub issue: [#3934](https://github.com/rabbitmq/rabbitmq-server/pull/3934)
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* More efficient (up to 67% more) user addition and updates, including during definition import.
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GitHub issue: [#3894](https://github.com/rabbitmq/rabbitmq-server/pull/3894)
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* Authentiication and authorization backend exceptions could potentially leak user-provided credentials
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to node log.
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Contributed by @luos on behalf of [LKAB](https://www.lkab.com/).
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GitHub issue: [#3903](https://github.com/rabbitmq/rabbitmq-server/pull/3903)
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* When a non-existent stream offset is requested, the server will return a more appropriate
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error code.
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GitHub issue: [#3783](https://github.com/rabbitmq/rabbitmq-server/issues/3783)
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* Stream operations that fail due to an unavailable leader now use a separate error code
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from the case when the stream does not exist.
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GitHub issue: [#3874](https://github.com/rabbitmq/rabbitmq-server/issues/3874)
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* Deprecated classic health check is now less resource intensive (but still very intensive
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compared to [modern alternatives](https://rabbitmq.com/monitoring.html#health-checks)).
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GitHub issue: [#3905](https://github.com/rabbitmq/rabbitmq-server/pull/3905)
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* Operator and regular policy merging now supports keys that use boolean values.
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The operator value overrides the regular policy one.
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GitHub issue: [#3880](https://github.com/rabbitmq/rabbitmq-server/pull/3880)
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* Free disk space monitoring robustness improvements on Windows.
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GitHub issue: [#3895](https://github.com/rabbitmq/rabbitmq-server/pull/3895)
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* Unnamed parameters and policies in definition files will now be rejected
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as invalid.
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Contributed by @polaris-alioth.
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GitHub issue: [#971](https://github.com/rabbitmq/rabbitmq-server/issues/971)
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### OAuth 2 Plugin
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#### Enhancements
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* HTTPS client and related improvements for JWKS URLs.
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Contributed by @anhanhnguyen on behalf of [LKAB](https://www.lkab.com/).
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GitHub issue: [#3887](https://github.com/rabbitmq/rabbitmq-server/pull/3887)
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## Dependency Upgrades
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None in this release.
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## Source Code Archives
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To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.9.12.tar.xz`
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instead of the source tarball produced by GitHub.
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