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3.11.11 release notes
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release-notes/3.11.11.md

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RabbitMQ `3.11.11` is a maintenance release in the `3.11.x` [release series](https://www.rabbitmq.com/versions.html).
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Please refer to the upgrade section from [v3.11.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.11.0)
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if upgrading from a version prior to 3.11.0.
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This release requires Erlang 25.
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[RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/which-erlang.html) has more details on
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Erlang version requirements for RabbitMQ.
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### Minimum Supported Erlang Version
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As of 3.11.0, RabbitMQ requires Erlang 25. Nodes **will fail to start** on older Erlang releases.
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Erlang 25 as our new baseline means much improved performance on ARM64 architectures, [profiling with flame graphs](https://blog.rabbitmq.com/posts/2022/05/flame-graphs/)
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across all architectures, and the most recent TLS 1.3 implementation available to all RabbitMQ 3.11 users.
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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/v3.11.x/release-notes).
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### Core Server
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#### Bug Fixes
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* Streams consumers that oscillate between being active and inactive, or just happen to be
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temporarily become really slow, could become completely starved of deliveries. That is,
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their message delivery rate could drop to 0 while other consumers did not have this problem.
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GitHub issue: [#7638](https://github.com/rabbitmq/rabbitmq-server/pull/7638)
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* Stream coordinator process memory footprint is now reported correctly (and classified differently).
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Contributed by @gomoripeti (CloudAMQP).
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GitHub issue: [#7548](https://github.com/rabbitmq/rabbitmq-server/pull/7548)
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#### Enhancements
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* There is now a way to pre-configure users and their permissions for newly created virtual hosts:
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``` ini
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default_users.qa_user.vhost_pattern = qa.*
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default_users.qa_user.tags = policymaker,monitoring
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default_users.qa_user.password = fd237824441a78cd922410af4b83f0888186a8d7
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default_users.qa_user.read = .*
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default_users.qa_user.write = .*
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default_users.qa_user.configure = .*
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```
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This is primarily useful in environments where RabbitMQ is provided as a service but
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customers (clients) have control over virtual hosts.
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Contributed by @illotum (AWS).
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GitHub issue: [#7208](https://github.com/rabbitmq/rabbitmq-server/issues/7208).
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### STOMP Plugin
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#### Enhancements
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* Consumers on `/queue/` destinations that consume from [streams](https://rabbitmq.com/streams.html) now can specify the
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`x-stream-max-segment-size-bytes` setting via `SUBSCRIBE` frame headers.
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GitHub issues: [#7605](https://github.com/rabbitmq/rabbitmq-server/pull/7605)
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### etcd Peer Discovery Plugin
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#### Bug Fixes
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* Node key TTL setting was unintentionally ignored.
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GitHub issues: [#7554](https://github.com/rabbitmq/rabbitmq-server/issues/7554)
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## Dependency Upgrades
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None in this release.
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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-3.11.11.tar.xz`
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instead of the source tarball produced by GitHub.

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