102 lines
3.5 KiB
Markdown
102 lines
3.5 KiB
Markdown
## RabbitMQ 4.0.7
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RabbitMQ `4.0.7` is a maintenance release in the `4.0.x` [release series](https://www.rabbitmq.com/release-information).
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Starting June 1st, 2024, community support for this series will only be provided to [regularly contributing users](https://github.com/rabbitmq/rabbitmq-server/blob/main/COMMUNITY_SUPPORT.md) and those
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who hold a valid [commercial support license](https://tanzu.vmware.com/rabbitmq/oss).
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It is **strongly recommended** that you read [4.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.0.1)
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in detail if upgrading from a version prior to `4.0.0`.
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### Minimum Supported Erlang Version
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This release requires Erlang 26 and supports Erlang versions up to `27.2.x`.
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[RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/docs/which-erlang) has more details on
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Erlang version requirements for RabbitMQ.
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Nodes **will fail to start** on older Erlang releases.
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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/v4.0.x/release-notes).
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### Core Broker
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#### Bug Fixes
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* Classic queue message store did not remove segment files with large messages (over 4 MB) in some cases.
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GitHub issue: [#13430](https://github.com/rabbitmq/rabbitmq-server/pull/13430)
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* A node with Khepri enabled would fail to start if its metadata store contained an exclusive queue
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with at least one binding.
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GitHub issues: [#13352](https://github.com/rabbitmq/rabbitmq-server/issues/13352), [#13394](https://github.com/rabbitmq/rabbitmq-server/pull/13394)
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#### Enhancements
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* Reduced memory usage and GC pressure for workloads where large (4 MB or greater) messages were published to classic queues.
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Contributed by @gomoripeti.
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GitHub issue: [#13375](https://github.com/rabbitmq/rabbitmq-server/pull/13375)
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### CLI Tools
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#### Deprecations
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* `rabbitmq-streams set_stream_retention_policy` is now a no-op.
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It was a leftover from the early days of streams. The modern and optimal way of configuring
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stream retention is [via a policy](https://www.rabbitmq.com/docs/streams#retention).
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GitHub issue: [#13358](https://github.com/rabbitmq/rabbitmq-server/pull/13358)
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### Prometheus Plugin
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#### Enhancements
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* New labels make it possible to differentiate between the metrics with the same name scraped from the aggregated
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metric endpoint and the [per-object metric endpoint](https://www.rabbitmq.com/docs/prometheus#metric-aggregation).
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GitHub issue: [#13239](https://github.com/rabbitmq/rabbitmq-server/pull/13239)
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### Management Plugin
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#### Bug Fixes
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* Who help tooltips were not updated for 4.0.x.
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GitHub issue: [#13357](https://github.com/rabbitmq/rabbitmq-server/pull/13357)
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#### Enhancements
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* Consumer count is a new column that can be enabled for the channels table on the tab of the same name.
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Contributed by @gomoripeti.
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GitHub issue: [#13258](https://github.com/rabbitmq/rabbitmq-server/pull/13258)
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### Caching Authentication and Authorization Backend Plugin
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#### Enhancements
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* `rabbitmqctl clear_auth_backend_cache` is a new command that clears the [cache maintained by the plugin](https://www.rabbitmq.com/docs/auth-cache-backend).
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### Dependency Changes
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* `ra` was upgraded to [`2.15.2`](https://github.com/rabbitmq/ra/releases)
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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-4.0.7.tar.xz`
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instead of the source tarball produced by GitHub.
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