100 lines
3.7 KiB
Markdown
100 lines
3.7 KiB
Markdown
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RabbitMQ `3.9.21` is a maintenance release in the `3.9.x` release series.
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Please refer to the **Upgrading to 3.9** section from [v3.9.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.9.0) if upgrading from a version prior to 3.9.0.
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This release requires at least Erlang 23.2, and supports Erlang 24. [RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/which-erlang.html) has more details on Erlang version requirements for RabbitMQ.
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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/v3.10.x/release-notes).
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### Core Server
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#### Enhancements
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* Optimization: internal message GUID is no longer generated for quorum queues and streams, as they
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are specific to classic queues.
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GitHub issue: [#5005](https://github.com/rabbitmq/rabbitmq-server/pull/5005)
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* Two more AMQP 1.0 connection lifecycle events are now logged.
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GitHub issue: [#4984](https://github.com/rabbitmq/rabbitmq-server/pull/4984)
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* TLS configuration for inter-node stream replication connections now can
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use function references and definitions.
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GitHub issue: [#4991](https://github.com/rabbitmq/rabbitmq-server/pull/4991)
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* Stream protocol connection logging is now less verbose.
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GitHub issue: [#5039](https://github.com/rabbitmq/rabbitmq-server/pull/5039)
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* Max stream segment size is now limited to 3 GiB to avoid a potential stream position overflow.
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GitHub issue: [#5035](https://github.com/rabbitmq/rabbitmq-server/pull/5035)
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* Logging messages that use microseconds now use "us" for the SI symbol to be compatible with more
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tools.
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GitHub issue: [#5127](https://github.com/rabbitmq/rabbitmq-server/pull/5127)
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#### Bug Fixes
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* Inter-node cluster link statistics did not have any data when TLS was enabled for them.
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GitHub issue: [#4981](https://github.com/rabbitmq/rabbitmq-server/issues/4981)
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* Quorum queues now correctly propagate errors when a `basic.get` (polling consumption) operation hits
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a timeout.
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Contributed by Ayanda @Ayanda-D Dube.
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GitHub issue: [#5109](https://github.com/rabbitmq/rabbitmq-server/pull/5109)
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* Stream consumer that used AMQP 0-9-1 instead of a stream protocol client, and disconnected,
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leaked a file handle.
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GitHub issue: [#5088](https://github.com/rabbitmq/rabbitmq-server/pull/5088)
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* Max frame size and client heartbeat parameters for [RabbitMQ stream]() clients were not correctly
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set when taken from `rabbitmq.conf`.
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GitHub issue: [#5136](https://github.com/rabbitmq/rabbitmq-server/pull/5136)
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* Removed a duplicate exchange decorator set operation.
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Contributed by Péter @gomoripeti Gömöri.
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GitHub issue: [#4964](https://github.com/rabbitmq/rabbitmq-server/pull/4964)
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### Consistent Hashing Exchange Plugin
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#### Bug Fixes
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* Node restarts could result in a hashing ring inconsistency.
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This required a **potentially breaking change**: this exchange type
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now only allows for **one binding between an exchange and a queue** (or another exchange).
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All subsequent binding operations between them will be ignored, so "first write wins".
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This is a natural topology for this plugin, and enforcing it helps avoid a set of
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potential issues with concurrent node restarts and client operations that affect
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consistent hash ring state.
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GitHub issue: [#3386](https://github.com/rabbitmq/rabbitmq-server/issues/3386)
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## Dependency Upgrades
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* `osiris` upgraded from [`1.2.7` to `1.2.8`](https://github.com/rabbitmq/osiris/compare/v1.2.7...v1.2.8)
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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-3.9.21.tar.xz`
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instead of the source tarball produced by GitHub.
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