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## RabbitMQ 3.13.5
RabbitMQ `3.13.5` is a maintenance release in the `3.13.x` [release series](https://www.rabbitmq.com/release-information).
**Please skip this release and upgrade straight to `3.13.6`** or a later version (if available).
Starting June 1st, 2024, community support for this series will only be provided to [regularly contributing users](https://github.com/rabbitmq/rabbitmq-server/blob/main/COMMUNITY_SUPPORT.md) and those
who hold a valid [commercial support license](https://tanzu.vmware.com/rabbitmq/oss).
Please refer to the upgrade section from the [3.13.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.13.0)
if upgrading from a version prior to 3.13.0.
This release requires Erlang 26 and supports Erlang versions up to `26.2.x`.
[RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/docs/which-erlang) has more details on
Erlang version requirements for RabbitMQ.
### Minimum Supported Erlang Version
As of 3.13.0, RabbitMQ requires Erlang 26. Nodes **will fail to start** on older Erlang releases.
Users upgrading from 3.12.x (or older releases) on Erlang 25 to 3.13.x on Erlang 26
(both RabbitMQ *and* Erlang are upgraded at the same time) **must** consult
the [v3.12.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.12.0) and [v3.13.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.13.0) first.
## Changes Worth Mentioning
Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.13.x/release-notes).
### Core Broker
#### Bug Fixes
* Quorum queue replicas could fail to recover in certain scenarios.
GitHub issue: [#11769](https://github.com/rabbitmq/rabbitmq-server/pull/11769)
* Safer AMQP 0-9-1 to AMQP 1.0 (the internal message format) conversion for longer string values.
GitHub issue: [#11737](https://github.com/rabbitmq/rabbitmq-server/pull/11737)
* When a message that contained an `x-deaths` [dead-lettering](https://www.rabbitmq.com/docs/dlx) header was republished "as is" by a client,
the `time` field in the dead lettering events was not correctly converted for AMQP 0-9-1 clients.
GitHub issue: [#11608](https://github.com/rabbitmq/rabbitmq-server/pull/11608)
* [Direct Reply-to](https://www.rabbitmq.com/docs/direct-reply-to) failed with an exception when firehose tracing was enabled.
GitHub issue: [#11666](https://github.com/rabbitmq/rabbitmq-server/pull/11666)
### CLI Tools
#### Bug Fixes
* `rabbitmqctl export_definitions` failed if cluster contained custom federation upstream set definitions.
GitHub issue: [#11612](https://github.com/rabbitmq/rabbitmq-server/issues/11612)
### MQTT Plugin
#### Bug Fixes
* An abrupt client TCP connection closure could result in a spike in that connection's memory footprint.
GitHub issue: [#11683](https://github.com/rabbitmq/rabbitmq-server/pull/11683)
### Shovel Plugin
#### Enhancements
* Improved AMQP 1.0 to AMQP 0-9-1 conversion for shovels.
Contributed by @luos.
GitHub issue: [#10037](https://github.com/rabbitmq/rabbitmq-server/pull/10037)
### etcd Peer Discovery Plugin
#### Bug Fixes
* Nodes now register themselves before running peer discovery, reducing the probability of
first (usually) two nodes to boot potentially forming two initial clusters.
GitHub issues: [#11647](https://github.com/rabbitmq/rabbitmq-server/pull/11647), [#11646](https://github.com/rabbitmq/rabbitmq-server/pull/11646)
### Consul Peer Discovery Plugin
#### Bug Fixes
* Nodes now register themselves before running peer discovery, reducing the probability of
first (usually) two nodes to boot potentially forming two initial clusters.
GitHub issues: [#11647](https://github.com/rabbitmq/rabbitmq-server/pull/11647), [#11646](https://github.com/rabbitmq/rabbitmq-server/pull/11646)
### AWS Peer Discovery Plugin
#### Enhancements
* Forward compatibility: handle AWS API responses that use empty HTTP response bodies.
Contributed by @SimonUnge.
GitHub issue: [#11722](https://github.com/rabbitmq/rabbitmq-server/pull/11722)
### Dependency Changes
* Ra was [upgraded to `2.13.3`](https://github.com/rabbitmq/ra/releases)
## Source Code Archives
To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.13.5.tar.xz`
instead of the source tarball produced by GitHub.
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