[Questions] Is it possible to set frame_max to a larger value to accept larger jwt token?

[romerod]

Community Support Policy

• I have read RabbitMQ's Community Support Policy
• I run RabbitMQ 4.x, the only series currently covered by community support
• I promise to provide all relevant information (versions, logs from all nodes, rabbitmq-diagnostics output, detailed reproduction steps)

RabbitMQ version used

4.1.0

Erlang version used

27.3.x

Operating system (distribution) used

Docker rabbitmq:4.1-management

How is RabbitMQ deployed?

Community Docker image

rabbitmq-diagnostics status output

See https://www.rabbitmq.com/docs/cli to learn how to use rabbitmq-diagnostics

Logs from node 1 (with sensitive values edited out)

See https://www.rabbitmq.com/docs/logging to learn how to collect logs

025-05-21 06:10:03.103807+00:00 [error] <0.889.0> closing AMQP connection <0.889.0> (172.18.0.1:45398 -> 172.18.0.2:5671, duration: '3s'):

2025-05-21 06:10:03.103807+00:00 [error] <0.889.0> {handshake_error,starting,

2025-05-21 06:10:03.103807+00:00 [error] <0.889.0>                  {amqp_error,frame_error,

2025-05-21 06:10:03.103807+00:00 [error] <0.889.0>                              "type 1, all octets = <<>>: {frame_too_large,8639,8184}",

2025-05-21 06:10:03.103807+00:00 [error] <0.889.0>                              none}}

Logs from node 2 (if applicable, with sensitive values edited out)

No response

Logs from node 3 (if applicable, with sensitive values edited out)

No response

rabbitmq.conf

See https://www.rabbitmq.com/docs/configure#config-location to learn how to find rabbitmq.conf file location

# PASTE rabbitmq.conf HERE, BETWEEN BACKTICKS

Steps to deploy RabbitMQ cluster

Steps to reproduce the behavior in question

Use a JWT token with a size larger then frame_max described in #13755

advanced.config

No response

Application code

No response

Kubernetes deployment file

No response

What problem are you trying to solve?

With the 4.1 release the frame_max was made larger to be able to accept larger tokens, is there a way to support larger jwt tokens?

I've already tried setting frame_max in rabbitmq.conf without success.

[michaelklishin]

@romerod the pre-authentication frame size is a constant which has been bumped for 4.1.0 in #13542.

[michaelklishin]

initial_frame_max = 16384

will double the default.