4.1.1 release notes

Author: michaelklishin

release-notes/4.1.1.md

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+## RabbitMQ 4.1.1
+
+RabbitMQ `4.1.1` is a maintenance release in the `4.1.x` [release series](https://www.rabbitmq.com/release-information).
+
+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).
+
+It is **strongly recommended** that you read [4.1 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.1.0)
+in detail if upgrading from a version prior to `4.1.0`.
+
+
+### Minimum Supported Erlang Version
+
+This release requires Erlang 26 and supports Erlang versions up to `27.3.x`.
+[RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/docs/which-erlang) has more details on
+Erlang version requirements for RabbitMQ.
+
+Nodes **will fail to start** on older Erlang releases.
+
+
+## Changes Worth Mentioning
+
+Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v4.1.x/release-notes).
+
+
+### Core Server
+
+#### Enhancements
+
+ * [Default queue type](https://www.rabbitmq.com/docs/vhosts#default-queue-type) is now injected into virtual host metadata when the virtual host
+   is created.
+
+   This seemingly subtle change elimiantes confusing inconsistencies between different
+   definition export methods and scenarios.
+
+   GitHub issue: [#13854](https://github.com/rabbitmq/rabbitmq-server/pull/13854)
+
+ * Empty classic queues init faster after a clean shutdown.
+
+   Contributed by @gomoripeti.
+
+   GitHub issue: [#13870](https://github.com/rabbitmq/rabbitmq-server/pull/13870)
+
+ * Private key password could appear in certain exceptions at (failed) node boot time.
+
+   GitHub issue: [#13999](https://github.com/rabbitmq/rabbitmq-server/pull/13999), [#14028](https://github.com/rabbitmq/rabbitmq-server/pull/14028)
+
+
+#### Bug Fixes
+
+ * Classic queue message store compaction could fall behind (not be able to keep up with)
+   very busy publishers.
+
+   GitHub issue: [#13987](https://github.com/rabbitmq/rabbitmq-server/pull/13987)
+
+ * Classic queue message store could run into a rare exception
+   when a message was routed to multiple queues.
+
+   GitHub issue: [#13758](https://github.com/rabbitmq/rabbitmq-server/issues/13758)
+
+ * Quorum queue commit map operation order was Erlang-version specific,
+   potentially leading to confusing inconsistencies between replica behaviors.
+
+   GitHub issue: [#14025](https://github.com/rabbitmq/rabbitmq-server/pull/14025)
+
+ * Quorum queue failed to recover from a rare timeout during cluster formation.
+
+   GitHub issue: [#13828](https://github.com/rabbitmq/rabbitmq-server/issues/13828)
+
+ * RabbitMQ could fail to log certain client connection errors for TLS-enabled
+   listeners.
+
+   Contributed by @LoisSotoLopez.
+
+   GitHub issue: [#13985](https://github.com/rabbitmq/rabbitmq-server/pull/13985)
+
+
+### Stream Plugin
+
+#### Bug Fixes
+
+ * Stream producer could run into an exception (`accept_chunk_out_of_order`) when a publishing filter
+   was enabled.
+
+   GitHub issue: [#13897](https://github.com/rabbitmq/rabbitmq-server/issues/13897)
+
+ * Stream [SAC](https://www.rabbitmq.com/docs/streams#single-active-consumer) coordinator failed when a super stream consumer was added next to
+   a SAC consumer.
+
+   GitHub issue: [#13835](https://github.com/rabbitmq/rabbitmq-server/issues/13835)
+
+
+### CLI Tools
+
+#### Enhancements
+
+ * `rabbitmq-queues force_checkpoint [--vhost-pattern <pattern>] [--queue-pattern <pattern>]`
+   is a new command that forces a group of quorum queues to take a checkpoint and
+   delete its on disk segment files, where possible.
+
+   Contributed by @aaron-seo.
+
+   GitHub issue: [#13938](https://github.com/rabbitmq/rabbitmq-server/pull/13938)
+
+
+### Management Plugin
+
+#### Enhancements
+
+ * A separate chain for authentication and authorization backends now can be used
+   used exclusively for the HTTP API and the management UI.
+
+   Contributed by @aaron-seo.
+
+   GitHub issue: [#13819](https://github.com/rabbitmq/rabbitmq-server/pull/13819)
+
+ * Reduced memory footprint of the plugin for certain workloads.
+
+   Contributed by @the-mikedavis.
+
+   GitHub issue: [#13900](https://github.com/rabbitmq/rabbitmq-server/pull/13900)
+
+ * When UI session expires, the user is redirected to the login page.
+
+   Contributed by @the-mikedavis.
+
+   GitHub issue: [#13975](https://github.com/rabbitmq/rabbitmq-server/pull/13975)
+
+ * `GET /api/health/checks/ready-to-serve-clients` is a new health check
+   that responds a 200 OK if the target node has fewer connections to the AMQP
+   and AMQPS ports than the configured maximum.
+
+   Contributed by @the-mikedavis.
+
+   GitHub issue: [#13782](https://github.com/rabbitmq/rabbitmq-server/issues/13782)
+
+ * `GET /api/health/checks/ready-to-serve-clients` is a new health check
+   that responds a 200 OK if the target node is ready to serve clients
+   (booted, not above the connection limit, not in [maintenance mode](https://www.rabbitmq.com/docs/upgrade#maintenance-mode)).
+
+   Contributed by @the-mikedavis.
+
+   GitHub issue: [#13782](https://github.com/rabbitmq/rabbitmq-server/issues/13782)
+
+ * Protocol listener health check now supports comma-separated lists of
+   protocol names.
+
+   Contributed by @the-mikedavis.
+
+   GitHub issue: [#13874](https://github.com/rabbitmq/rabbitmq-server/pull/13874)
+
+ * New page for declaring super streams (partitioned streams).
+
+   GitHub issue: [#13852](https://github.com/rabbitmq/rabbitmq-server/pull/13852)
+
+
+### OAuth 2 Plugin
+
+#### Enhancements
+
+ * Select variables now can be used in scopes, for example: `"rabbitmq.write:*/x-{vhost}-*/u-{sub}-*"`
+
+   GitHub issue: [#14008](https://github.com/rabbitmq/rabbitmq-server/pull/14008)
+
+
+### Shovel Plugin
+
+#### Bug Fixes
+
+ * Shovels could fail to convert messages published by an AMQP 0-9-1
+   client to AMQP 1.0 if the headers had a complex structure.
+
+   GitHub issue: [#13801](https://github.com/rabbitmq/rabbitmq-server/pull/13801)
+
+
+
+### Dependency Changes
+
+ * `ra` was updated to [`2.16.9`](https://github.com/rabbitmq/ra/releases)
+ * `osiris` was updated to [`1.8.8`](https://github.com/rabbitmq/osiris/releases)
+
+
+## Source Code Archives
+
+To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-4.1.1.tar.xz`
+instead of the source tarball produced by GitHub.