80 lines
3.2 KiB
Markdown
80 lines
3.2 KiB
Markdown
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## RabbitMQ 3.7.26
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RabbitMQ `3.7.26` is a maintenance release. It focuses on bug fixes and usability
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improvements.
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RabbitMQ `3.7.x` series are out of general support and covered by the [limited extended support](https://www.rabbitmq.com/versions.html) policy.
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Please consider [upgrading](https://www.rabbitmq.com/upgrade.html) to [RabbitMQ `3.8.x`](https://www.rabbitmq.com/changelog.html).
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### Erlang/OTP Compatibility Notes
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This release [**no longer supports Erlang/OTP 20.3**](https://groups.google.com/d/msg/rabbitmq-users/G4UJ9zbIYHs/qCeyjkjyCQAJ).
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Previously recent `3.7.x` nodes could start on Erlang 20.3 and to some extent tested on it despite
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the Erlang `21.3+` requirements in release notes and documentation.
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Starting with this release, `21.3+` is a **hard requirement** enforced in the code
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to [ensure forward compatibility with Erlang 23](https://github.com/rabbitmq/rabbitmq-server/pull/2269).
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Make sure a [supported Erlang version](https://www.rabbitmq.com/which-erlang.html) is used before upgrading.
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[Provisioning Latest Erlang Releases](https://www.rabbitmq.com/which-erlang.html#erlang-repositories) explains
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what package repositories and tools can be used to provision latest patch versions of Erlang `21.3.x` and `22.x`.
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### Compatibility Notes
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#### Upgrading to Erlang 21.x or Later Versions
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When upgrading to this release **and upgrading Erlang to 21.x or later** at the same time, extra care has to be taken.
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Since CLI tools from RabbitMQ releases older than 3.7.7 will fail on Erlang 21 or later,
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RabbitMQ **must be upgraded before Erlang**.
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#### Upgrade Doc Guides and Change Log
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See [3.7.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.7.0) upgrade
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and compatibility notes first if upgrading from an earlier release.
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See the [Upgrading guide](https://www.rabbitmq.com/upgrade.html) for general documentation on upgrades
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and [RabbitMQ change log](https://www.rabbitmq.com/changelog.html) for release notes of other releases.
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### Getting Help
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Any questions about this release, upgrades or RabbitMQ in general are welcome on the
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[RabbitMQ mailing list](https://groups.google.com/forum/#!forum/rabbitmq-users).
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## Changes
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### Federation Plugin
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#### Enhancements
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* "Command" operations such as binding propagation now use a separate channel for all links, preventing latency
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spikes for asynchronous operations (such as message publishing) (a head-of-line blocking problem).
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Contributed by Grigory Starinkin.
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GitHub issue: [rabbitmq/rabbitmq-federation#97](https://github.com/rabbitmq/rabbitmq-federation/pull/97)
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### Management Plugin
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#### Bug Fixes
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* `rabbitmqadmin` failed with an exception on Python 3 when `-f pretty_json` flag was used.
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GitHub issue: [rabbitmq/rabbitmq-management#794](https://github.com/rabbitmq/rabbitmq-management/issues/794)
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### Shovel Plugin
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#### Bug Fixes
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* AMQP 1.0 client used by Shovel now correctly encodes Erlang atoms.
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GitHub issue: [rabbitmq/rabbitmq-amqp1.0-client#45](https://github.com/rabbitmq/rabbitmq-amqp1.0-client/issues/45)
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## Source code archives
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**Warning**: The source code archive provided by GitHub only contains the source of the broker,
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not the plugins or the client libraries. Please download the archive named `rabbitmq-server-3.7.26.tar.xz`.
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