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RabbitMQ `3.10.18` is a maintenance release in the `3.10.x` [release series](https://www.rabbitmq.com/versions.html).
This series [**reaches its end of community support** on July 31st, 2023](https://rabbitmq.com/versions.html).
Please refer to the upgrade section from [v3.10.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.10.0)
if upgrading from a version prior to 3.10.0.
This release **requires Erlang 24.3** and supports 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
Erlang 23 and 24 versions older than 24.3 have reached [end of support](https://www.rabbitmq.com/which-erlang.html).
This release of RabbitMQ requires Erlang 24.3 or later versions. Nodes **will fail to start** on older Erlang releases.
Erlang 25 is recommended: it offers 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.
## Changes Worth Mentioning
Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.10.x/release-notes).
### Core Server
#### Bug Fixes
* Reset and manually added nodes could start receiving stream replica data before its database was initialized,
confusing all code paths that expected a blank node state.
GitHub issue: [#7222](https://github.com/rabbitmq/rabbitmq-server/pull/7222)
* Nodes could run into an exception with certain publishers that used QPid for client library.
GitHub issue: [#7119](https://github.com/rabbitmq/rabbitmq-server/issues/7119)
### CLI Tools
#### Features
* `rabbitmqctl set_permissions_globally` is a new command that sets up user permissions in all existing virtual hosts.
GitHub issue: [#1000](https://github.com/rabbitmq/rabbitmq-server/issues/1000)
* `rabbitmq-diagnostics cluster_status` now lists how many CPU cores are available to individual nodes, plus a total.
GitHub issue: [#7135](https://github.com/rabbitmq/rabbitmq-server/pull/7135)
### MQTT Plugin
#### Bug Fixes
* MQTT nodes did not correctly remove client IDs for clients connected to a node that was in the process of
being removed from the cluster.
GitHub issue: [#7162](https://github.com/rabbitmq/rabbitmq-server/pull/7162)
### LDAP Plugin
#### Bug Fixes
* Due to a `$` sign escaping differences between Make and Bazel (the newly adopted build tool),
default value of of `user_dn_pattern` setting was incorrect (had an extra `$`).
GitHub issue: [#7161](https://github.com/rabbitmq/rabbitmq-server/issues/7161)
## Dependency Upgrades
None in this release.
## Source Code Archives
To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.10.18.tar.xz`
instead of the source tarball produced by GitHub.
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