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## RabbitMQ 3.8.14
RabbitMQ `3.8.14` is a maintenance release that restores
Erlang 22.3 compatibility for environments that use [direct reply-to](/direct-reply-to.html).
### Erlang/OTP Compatibility Notes
This release [requires Erlang 22.3](https://www.rabbitmq.com/which-erlang.html).
[Erlang 23](http://blog.erlang.org/OTP-23-Highlights/) is highly recommended
for best forward compatibility with future RabbitMQ versions.
[Provisioning Latest Erlang Releases](https://www.rabbitmq.com/which-erlang.html#erlang-repositories) explains
what package repositories and tools can be used to provision a recent version of Erlang `23.x`.
## Upgrade and Compatibility Notes
### Upgrade Doc Guides and Change Log
See [3.8.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.8.0) upgrade and
compatibility notes first if upgrading from an earlier release series (e.g. `3.7.x`).
See the [Upgrading guide](https://www.rabbitmq.com/upgrade.html) for general documentation on upgrades and
[RabbitMQ change log](https://www.rabbitmq.com/changelog.html) for release notes of other releases.
### Upgrading to Erlang 23.x or Later Versions
When upgrading to this release from `3.7.15` or an older version, extra care has to be taken.
Because older RabbitMQ CLI tools can be incompatible with Erlang 22+ releases,
RabbitMQ **must be upgraded at the same time as Erlang**.
Alternatively the node can be upgraded to `3.7.18` on Erlang 21.3 first,
then Erlang 23.x, then RabbitMQ to the most recent 3.8.x release.
### Getting Help
Any questions about this release, upgrades or RabbitMQ in general are welcome on the [RabbitMQ mailing list](https://groups.google.com/forum/#!forum/rabbitmq-users)
and [RabbitMQ community Slack](https://rabbitmq-slack.herokuapp.com/).
## Changes Worth Mentioning
### Core Server
#### Bug Fixes
* [Direct reply-to](https://www.rabbitmq.com/direct-reply-to.html) failed witn an exception on Erlang 22.3.
Nodes running on Erlang 23 are not affected.
GitHub issue: [#2857](https://github.com/rabbitmq/rabbitmq-server/pull/2857)
* A warnings about async I/O threads was replaced with a similar one about dirty I/O
schedulers. This keeps the message up with the settings used in modern Erlang releases.
GitHub issue: [#2854](https://github.com/rabbitmq/rabbitmq-server/pull/2854)
### Other
#### Enhancements
* Community-maintained [RabbitMQ OCF scripts](https://github.com/rabbitmq/rabbitmq-server/blob/master/scripts/rabbitmq-server-ha.ocf) were revisited.
Contributed by Michele @mbaldessari Baldessari.
GitHub issue: [#2853](https://github.com/rabbitmq/rabbitmq-server/pull/2853)
## Dependency Upgrades
There were no dependency changes.
## Source Code Archives
To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.8.14.tar.xz`
instead of the source tarball produced by GitHub.
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