rabbitmq - Socket closed abruptly during opening handshake (from n8n - railway)

[lsxaustralia]

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

railway

How is RabbitMQ deployed?

Community Docker image

rabbitmq-diagnostics status output

2025-05-02 06:20:58.966899+00:00 [info] <0.1134.0> accepting AMQP connection 100.64.0.6:54246 -> 10.250.11.136:5672

May 02 16:21:02

RabbitMQ

2025-05-02T06:21:02.232252+00:00 error: FORMATTER CRASH: {"closing AMQP connection ~tp (~ts):~nfailed to negotiate connection parameters: ~ts",[<0.1134.0>,<<"100.64.0.6:54246 -> 10.250.11.136:5672">>,"3s","negotiated frame_max = 4096 is lower than the minimum allowed value (8192)"]}

Logs from node 1 (with sensitive values edited out)

dial tcp [fd12:ca43:429:0:a000:15:de77:f0d1]:15672: connect: connection refused

May 02 16:15:44

handled request

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

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

# PASTE LOG HERE, BETWEEN BACKTICKS

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

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

# PASTE LOG HERE, BETWEEN BACKTICKS

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

1 click install - railway template

Steps to reproduce the behavior in question

I just installed installed RabbitMQ using a template. I can access the web UI but I can't seem to connect using my credentials (I created a new user and added access to \ ). When connecting to it from n8n i get the following error:

2025-05-02 06:20:58.966899+00:00 [info] <0.1134.0> accepting AMQP connection 100.64.0.6:54246 -> 10.250.11.136:5672

May 02 16:21:02

RabbitMQ

2025-05-02T06:21:02.232252+00:00 error: FORMATTER CRASH: {"closing AMQP connection ~tp (~ts):~nfailed to negotiate connection parameters: ~ts",[<0.1134.0>,<<"100.64.0.6:54246 -> 10.250.11.136:5672">>,"3s","negotiated frame_max = 4096 is lower than the minimum allowed value (8192)"]}

dial tcp [fd12:ca43:429:0:a000:15:de77:f0d1]:15672: connect: connection refused

May 02 16:15:44

handled request

advanced.config

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

# PASTE advanced.config HERE, BETWEEN BACKTICKS

Application code

# PASTE CODE HERE, BETWEEN BACKTICKS

Kubernetes deployment file

# Relevant parts of K8S deployment that demonstrate how RabbitMQ is deployed
# PASTE YAML HERE, BETWEEN BACKTICKS

What problem are you trying to solve?

I'd like to connect my n8n to rabbitmq

[mkuratczyk]

You are probably using amqp-node. You should upgrade it (it's mentioned in RabbitMQ 4.1.0 release notes):
https://github.com/amqp-node/amqplib/blob/main/CHANGELOG.md#v0106

The formatter crash error is a minor bug. We'll fix it but you can ignore it

[michaelklishin]

The formatter fix was submitted by @mkuratczyk in #13840.

[lsxaustralia]

It is possible to upgrade it even tho it's hosted on railway?

I was told by them they have a proxy and it seems to be the issue.

[mkuratczyk]

I have no idea

[mkuratczyk]

Wait, I think you misunderstood. You need to upgrade the client library, not RabbitMQ. 4.1.0 is already the latest

[lsxaustralia]

I'm on RabbitMQ 4.1.0 Erlang 27.3.3

[mkuratczyk]

Yes, this issue only affects RabbitMQ 4.1, which is why it's mentioned in 4.1.0 release notes

[lsxaustralia]

How can i fix this :)

[mkuratczyk]

I gave you a link...

[lsxaustralia]

I'm a n00b, i don't know how to fix this. It's hosted on railway, i feel like i can only change variables... not sure what to do.

[mkuratczyk]

One more time: you need a newer amqp-node version. If Railway makes it hard for you - bring it up with them

[lsxaustralia]

Thank you heaps!!

[lsxaustralia]

Im using https://customer.cloudamqp.com/ with my n8n and it's working fine.
Since RabbitMQ has no amqp-node, what should i update then?
I know railway has a proxy but it should be working internally... shouldn't it?
They are giving me a hard time and telling me they can't help me with third party support

[michaelklishin]

@lsxaustralia if you pay CloudAMQP, why do you expect the RabbitMQ core team to offer you free support? CloudAMQP make money directly off of RabbitMQ and contribute 1% of its R&D costs, so please take all of your RabbitMQ questions to them and tell them to contribute their fair share.