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RabbitMQ `3.11.8` is a maintenance release in the `3.11.x` [release series](https://www.rabbitmq.com/versions.html).
Please refer to the upgrade section from [v3.11.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.11.0)
if upgrading from a version prior to 3.11.0.
This release requires Erlang 25.
[RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/which-erlang.html) has more details on
Erlang version requirements for RabbitMQ.
### Minimum Supported Erlang Version
As of 3.11.0, RabbitMQ requires Erlang 25. Nodes **will fail to start** on older Erlang releases.
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/)
across all architectures, and the most recent TLS 1.3 implementation available to all RabbitMQ 3.11 users.
## Changes Worth Mentioning
Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.11.x/release-notes).
### Core Server
#### Enhancements
* Stream throughput improvements for workloads with a lot of very small (say, less than 10 bytes)
messages.
GitHub issue: [#6862](https://github.com/rabbitmq/rabbitmq-server/pull/6862)
### CLI Tools
#### Features
* `rabbitmqctl hash_password` is a new command that produces a [hashed value](https://www.rabbitmq.com/passwords.html#computing-password-hash) of the provided password.
Contributed by @SimonUnge (AWS).
GitHub issue: [#5957](https://github.com/rabbitmq/rabbitmq-server/issues/5957)
* `rabbitmq-diagnostics check_port_connectivity` now supports a new optional flag, `--address`,
that makes the check connect to a specific IP address instead of resolving node's hostname.
This is useful when target node is configured to only listen for connections on one interface
but not others:
``` shell
rabbitmq-diagnostics check_port_connectivity --address 127.0.0.1
rabbitmq-diagnostics check_port_connectivity --address "::1"
```
GitHub issue: [#6853](https://github.com/rabbitmq/rabbitmq-server/issues/6853)
### Management Plugin
#### Bug Fixes
* User filtering combined with pagination in the management UI did not work as expected.
GitHub issue: [#4908](https://github.com/rabbitmq/rabbitmq-server/issues/4908)
* Correctly format JSON field value in channel detail API response.
Contributed @Syuparn.
GitHub issue: [#2684](https://github.com/rabbitmq/rabbitmq-server/issues/2684)
### AMQP 1.0 Plugin
#### Bug Fixes
* AMQP 1.0 connection churn resulted in a memory leak.
GitHub issue: [#6969](https://github.com/rabbitmq/rabbitmq-server/issues/6969)
### STOMP Plugin
#### Bug Fixes
* STOMP client subscriptions to a destination that is an AMQP 0-9-1 exchange now declares
auto-delete, exclusive queues (previously only auto-delete) as promised in the docs.
Contributed by @csicar.
GitHub issue: [#6955](https://github.com/rabbitmq/rabbitmq-server/issues/6955)
## Dependency Upgrades
* `osiris` was upgraded [from `1.4.2` to `1.4.3`](https://github.com/rabbitmq/osiris/tags)
* `thoas` was upgraded [from `0.4.1` to `1.0.0`](https://github.com/lpil/thoas/releases)
## Source Code Archives
To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.11.8.tar.xz`
instead of the source tarball produced by GitHub.
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