4.3.4 release notes

[ci skip]

Author: michaelklishin

release-notes/4.3.4.md

@@ -0,0 +1,89 @@
+## RabbitMQ 4.3.4
+
+RabbitMQ `4.3.4` is a maintenance release in the `4.3.x` [release series](https://www.rabbitmq.com/release-information).
+
+It is **strongly recommended** that you read [4.3.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0)
+in detail if upgrading from a version prior to `4.3.0`.
+
+### Minimum Supported Erlang Version
+
+The minimum supported Erlang version for this release series is `27.0`.
+
+[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/v4.3.x/release-notes).
+
+### Core Server
+
+#### Bug Fixes
+
+ * Quorum queues in clusters upgraded from `3.13.x` to `4.2.x` and then to `4.3.x` could stop
+   emitting metrics and taking snapshots after a node restart.
+
+   GitHub issues: [#16974](https://github.com/rabbitmq/rabbitmq-server/issues/16974), [#16990](https://github.com/rabbitmq/rabbitmq-server/pull/16990)
+
+ * The AMQP 1.0 parser now detects standard message body sections more strictly.
+
+   GitHub issue: [#17017](https://github.com/rabbitmq/rabbitmq-server/pull/17017)
+
+ * The AMQP 1.0 parser now decodes certain array values more efficiently.
+
+   GitHub issue: [#16994](https://github.com/rabbitmq/rabbitmq-server/pull/16994)
+
+
+### Stream Plugin
+
+#### Bug Fixes
+
+ * The [single active consumer](https://www.rabbitmq.com/docs/streams#single-active-consumer) coordinator
+   did not notify a consumer that was re-selected for activation while it was still deactivating,
+   leaving the group without an active consumer.
+
+   Contributed by @pterygota.
+
+   GitHub issues: [#16975](https://github.com/rabbitmq/rabbitmq-server/issues/16975), [#16976](https://github.com/rabbitmq/rabbitmq-server/pull/16976)
+
+
+### Management Plugin
+
+#### Bug Fixes
+
+ * Very short lived exclusive queues could cause an exception during metric collection, producing
+   log noise.
+
+   GitHub issues: [#16989](https://github.com/rabbitmq/rabbitmq-server/issues/16989), [#16999](https://github.com/rabbitmq/rabbitmq-server/issues/16999), [#17002](https://github.com/rabbitmq/rabbitmq-server/pull/17002)
+
+ * After an IdP-initiated OAuth 2 login, the management UI now returns the user
+   to the page that was open before the login instead of the default one.
+
+   Contributed by @thisisnsh.
+
+   GitHub issues: [#16957](https://github.com/rabbitmq/rabbitmq-server/pull/16957), [#16961](https://github.com/rabbitmq/rabbitmq-server/pull/16961)
+
+#### Enhancements
+
+ * The management UI Content Security Policy (CSP) no longer includes the `unsafe-eval` and
+   `unsafe-inline` directives.
+
+   GitHub issue: [#16916](https://github.com/rabbitmq/rabbitmq-server/pull/16916)
+
+
+### Federation Plugin
+
+#### Bug Fixes
+
+ * In scenarios that involved a federated queue and a federated exchange with exactly the same name in the same virtual host,
+   deleting an upstream unintentionally corrupted the federated exchange(s) operating state, breaking federation
+   for the exchange in question.
+
+   GitHub issues: [#16991](https://github.com/rabbitmq/rabbitmq-server/issues/16991), [#16997](https://github.com/rabbitmq/rabbitmq-server/pull/16997)
+
+
+ ### Dependency Changes
+
+ None in this release.