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RabbitMQ `3.12.6` is a maintenance release in the `3.12.x` [release series](https://www.rabbitmq.com/versions.html). | ||
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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. | ||
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This release requires Erlang 25 and supports Erlang versions up to `26.0.x`. | ||
[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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### Minimum Supported Erlang Version | ||
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As of 3.12.0, RabbitMQ requires Erlang 25. Nodes **will fail to start** on older Erlang releases. | ||
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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. | ||
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## Changes Worth Mentioning | ||
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Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.12.x/release-notes). | ||
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### Core Server | ||
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#### Bug Fixes | ||
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* `3.12.5` unintentionally shipped with a `seshat` version older than `0.6.1`. This can potentially | ||
result in an incompatibility with the stream subsystem. | ||
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GitHub issue: [#9499](https://github.com/rabbitmq/rabbitmq-server/pull/9499) | ||
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#### Enhancements | ||
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* Improved forward compatibility of classic queues with 3.13. | ||
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GitHub issue: [#9508](https://github.com/rabbitmq/rabbitmq-server/pull/9508) | ||
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## Dependency Upgrades | ||
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* `seshat` was upgraded to [`0.6.1`](https://github.com/rabbitmq/seshat/tags) | ||
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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-3.12.6.tar.xz` | ||
instead of the source tarball produced by GitHub. |