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4.0.5 release notes (backport #12945)
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| ## RabbitMQ 4.0.5 | ||
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| RabbitMQ `4.0.5` 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 | ||
| 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) | ||
| 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`. | ||
| [RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/docs/which-erlang) has more details on | ||
| 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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| * Reintroduced transient flow control between classic queue replicas and AMQP 0-9-1 channels, | ||
| MQTT connections. | ||
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| Flow control between these specific parts of the core were unintentionally | ||
| removed in `4.0.0` together with classic queue mirroring. | ||
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| Contributed by @gomoripeti. | ||
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| GitHub issue: [#12907](https://github.com/rabbitmq/rabbitmq-server/pull/12907) | ||
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| * The feature that warns when deprecated features are used in the cluster had a false positive that treated (and reported) any queue | ||
| as a "transient non-exclusive classic queue", even if the queue was of a different type, was not transient, and so on. | ||
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| GitHub issue: [#12802](https://github.com/rabbitmq/rabbitmq-server/issues/12802) | ||
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| * AMQP 1.0 clients with close to peak consumption rates with a high `max_link_creadit` setting could run into an exception | ||
| because RabbitMQ could set the incoming window size to a negative value. | ||
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| GitHub issue: [#12816](https://github.com/rabbitmq/rabbitmq-server/issues/12816), [#12904](https://github.com/rabbitmq/rabbitmq-server/pull/12904) | ||
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| * AMQP 0-9-1 channel exception generator could not handle entity names (say, queue or stream names) | ||
| that contained non-ASCII characters. | ||
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| This affected applications that use passive queue declarations, such as the Shovel plugin. | ||
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| Contributed by @bpint. | ||
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| GitHub issue: [#12888](https://github.com/rabbitmq/rabbitmq-server/pull/12888) | ||
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| * Peer discovery resilience improvements. | ||
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| GitHub issues: [#12801](https://github.com/rabbitmq/rabbitmq-server/pull/12801), [#12809](https://github.com/rabbitmq/rabbitmq-server/pull/12809) | ||
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| * Deadlettering of some messages could result in an exception. | ||
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| GitHub issue: [#12933](https://github.com/rabbitmq/rabbitmq-server/issues/12933), [#12938](https://github.com/rabbitmq/rabbitmq-server/pull/12938) | ||
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| #### Enhancements | ||
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| * For virtual hosts that have a [default queue type]() configured, the DQT value is now injected into | ||
| queue definitions in exported definition documents. | ||
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| GitHub issue: [#12776](https://github.com/rabbitmq/rabbitmq-server/issues/12776) | ||
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| * Definition export files now have additional "type" markers that help distinguish a cluster-wide definition file from | ||
| that of a single virtual host. | ||
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| GitHub issue: [#12835](https://github.com/rabbitmq/rabbitmq-server/issues/12835) | ||
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| ### Prometheus Plugin and Grafana Dashboards | ||
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| #### Enhancements | ||
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| * Two new stream metrics for streams. | ||
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| Contributed by @gomoripeti and @markus812498. | ||
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| GitHub issue: [#12765](https://github.com/rabbitmq/rabbitmq-server/pull/12765) | ||
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| ### Management Plugin | ||
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| #### Bug Fixes | ||
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| * Fixes a false positive that incorrectly reported deprecated feature use, specifically | ||
| the use of non-exclusive transient classic queues. | ||
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| GitHub issue: [#12840](https://github.com/rabbitmq/rabbitmq-server/pull/12840) | ||
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| * `GET /api/overview` did not format empty cluster and node list tags as an empty JSON object, | ||
| which was problematic for HTTP API clients with statically typed response data structures. | ||
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| GitHub issue: [#12797](https://github.com/rabbitmq/rabbitmq-server/pull/12797) | ||
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| * When a logged in user's JWT token was refreshed, the user identity displayed in the UI was changed. | ||
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| GitHub issue: [#12818](https://github.com/rabbitmq/rabbitmq-server/pull/12818) | ||
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| ### OAuth 2 Plugin | ||
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| #### Bug Fixes | ||
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| * When a logged in user's JWT token was refreshed, the user identity displayed in the UI was changed. | ||
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| GitHub issue: [#12818](https://github.com/rabbitmq/rabbitmq-server/pull/12818) | ||
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| ### AWS Peer Discovery Plugin | ||
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| #### Bug Fixes | ||
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| * Avoids an exception during automatic removal of cluster members that are | ||
| no longer returned by peer discovery (an [opt-in feature](https://www.rabbitmq.com/docs/cluster-formation#node-health-checks-and-cleanup)). | ||
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| GitHub issue: [#12809](https://github.com/rabbitmq/rabbitmq-server/pull/12809) | ||
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| ### Kubernetes Peer Discovery Plugin | ||
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| #### Bug Fixes | ||
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| * Avoids an exception during automatic removal of cluster members that are | ||
| no longer returned by peer discovery (an [opt-in feature](https://www.rabbitmq.com/docs/cluster-formation#node-health-checks-and-cleanup)). | ||
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| GitHub issue: [#12809](https://github.com/rabbitmq/rabbitmq-server/pull/12809) | ||
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| ### Consul Peer Discovery Plugin | ||
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| #### Bug Fixes | ||
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| * Avoids an exception during automatic removal of cluster members that are | ||
| no longer returned by peer discovery (an [opt-in feature](https://www.rabbitmq.com/docs/cluster-formation#node-health-checks-and-cleanup)). | ||
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| GitHub issue: [#12809](https://github.com/rabbitmq/rabbitmq-server/pull/12809) | ||
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| ### etcd Peer Discovery Plugin | ||
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| #### Bug Fixes | ||
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| * Avoids an exception during automatic removal of cluster members that are | ||
| no longer returned by peer discovery (an [opt-in feature](https://www.rabbitmq.com/docs/cluster-formation#node-health-checks-and-cleanup)). | ||
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| GitHub issue: [#12809](https://github.com/rabbitmq/rabbitmq-server/pull/12809) | ||
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| ### Dependency Changes | ||
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| * `osiris` was upgraded to [`1.8.5`](https://github.com/rabbitmq/osiris/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-4.0.5.tar.xz` | ||
| instead of the source tarball produced by GitHub. |