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Mention #13541 #13542 #13549 13551 in release notes 

References #13537.
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Michael Klishin 2025-03-17 16:54:31 -04:00
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release-notes/4.1.0.md
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@ -25,6 +25,20 @@ for the complete list of related changes.
## Breaking Changes and Compatibility Notes
### Initial AMQP 0-9-1 Maximum Frame Size
Before a client connection can negotiate a maximum frame size (`frame_max`), it must authenticate
successfully. Before the authenticated phase, a special lower `frame_max` value
is used.
With this release, the value was increased from the original 4096 bytes to 8192
to accommodate larger [JWT tokens](https://www.rabbitmq.com/docs/oauth2).
Clients that do override `frame_max` now must use values of 8192 bytes or greater.
We recommend using the default server value of `131072`: do not override the `frame_max`
key in `rabbitmq.conf` and do not set it in the application code.
### MQTT
* The default MQTT [Maximum Packet Size](https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901086) changed from 256 MiB to 16 MiB.