104 lines
3.2 KiB
Markdown
104 lines
3.2 KiB
Markdown
## RabbitMQ 4.2.1
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RabbitMQ `4.2.1` is a maintenance release in the `4.2.x` [release series](https://www.rabbitmq.com/release-information).
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It is **strongly recommended** that you read [4.2.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.0)
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in detail if upgrading from a version prior to `4.2.0`.
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### Minimum Supported Erlang Version
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[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/v4.2.x/release-notes).
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### Core Server
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#### Bug Fixes
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* Quorum queue at-most-once dead lettering for the overflow behaviour `drop-head` now happens in the correct order.
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GitHub issue: [#14926](https://github.com/rabbitmq/rabbitmq-server/pull/14926)
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* Feature flag state in the registry and on disk were not consistent for a period of time during node boot.
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GitHub issue: [#14943](https://github.com/rabbitmq/rabbitmq-server/pull/14943)
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### Stream Plugin
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#### Bug Fixes
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* `stream.read_ahead` is a new setting that controls how much data is prefetched from disk
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for stream reads (consumption).
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GitHub issue: [#14948/](https://github.com/rabbitmq/rabbitmq-server/pull/14948)
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* Stream deletion is now more resilient and can handle certain mid-deletion failure scenarios.
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GitHub issue: [#14852](https://github.com/rabbitmq/rabbitmq-server/issues/14852)
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### Grafana Dashboards
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#### Enhancements
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* The [dashboards](https://grafana.com/orgs/rabbitmq) were updated for RabbitMQ `4.2.x`.
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GitHub issue: [#14849](https://github.com/rabbitmq/rabbitmq-server/pull/14849)
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### Management Plugin
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#### Enhancements
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* `GET /api/queues/{vhost}` requests no longer perform unnecessary virtual host permission checks
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and log less (at `debug` level) as a result.
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GitHub issue: [#14923](https://github.com/rabbitmq/rabbitmq-server/discussions/14923)
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### Shovel Plugin
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#### Bug Fixes
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* Improved target node resource alarm handling for AMQP 1.0 and local shovels.
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GitHub issue: [#14886](https://github.com/rabbitmq/rabbitmq-server/pull/14886)
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* Local shovels could run into an exception that would cause a shovel restart.
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GitHub issue: [#14872](https://github.com/rabbitmq/rabbitmq-server/pull/14872)
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* AMQP 1.0 shovels ignored the `sasl` URI parameter.
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GitHub issue: [#14867](https://github.com/rabbitmq/rabbitmq-server/pull/14867)
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### OAuth 2 Plugin
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#### Bug Fixes
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* A usability improvement allows the plugin to automatically load the trusted system x.509 (TLS) certificates.
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GitHub issue: [#14927](https://github.com/rabbitmq/rabbitmq-server/pull/14927)
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### LDAP Plugin
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#### Bug Fixes
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* A usability improvement allows the plugin to automatically load the trusted system certificates
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when the user only enables TLS for the LDAP client but does not configure any other settings.
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GitHub issue: [#14937](https://github.com/rabbitmq/rabbitmq-server/pull/14937)
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### Dependency Changes
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* `cuttlefish` was upgraded to [`3.6.0`](https://github.com/kyorai/cuttlefish/releases)
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