Rabbit MQ trigger node fails with AWS MQ instance

Gowthaman_Prabhu · July 21, 2022, 6:51am

I have a Rabbit MQ trigger node that watches for messages in a queue. When executing the node manually I get the following error:
Frame size exceeds frame max

This error occurs even before inserting a message into the exchange/queue. It errors as soon as the node is executed and connection starts.

n8n version: 0.184.0
AWS Rabbit MQ version: 3.8.30

MutedJam · July 21, 2022, 9:24am

Hey @Gowthaman_Prabhu, are you by any chance running n8n behind a reverse proxy server or load balancer? This might cause trouble as RabbitMQ uses the AMQP protocol instead of the HTTP protocol which most reverse proxy servers are configured to handle. Check out their documentation on this topic:

https://www.rabbitmq.com/networking.html#intermediaries

There’s also other reports out there suggesting this could be down to the RabbitMQ ports being used by other applications:

github.com/amqp-node/amqplib

Frame size exceeds frame max ERROR

opened 11:20PM - 23 Feb 20 UTC

closed 04:38PM - 24 Feb 20 UTC

Mayhem93

Hello, So I've recently picked up working on my project again (it's been like… almost a year) and I'm encountering the "`Frame size exceeds frame max`" error. I'm using [email protected] through windows docker and the version of amqplib is 0.5.5 I isolated the connection part of the code and tried running this script: ```javascript const amqplib = require('amqplib'); const config = require('./config.json').amqp; (async () => { await amqplib.connect({ protocol: 'amqp', port: 5672, host: config.host, username: config.user, password: config.password, frameMax: 4096 }); })(); process.on('unhandledRejection', err => { console.log(err); process.exit(1); }); ``` ...but I still get that error I've looked all over the internet for this error but nothing actually helps me 🙁 Maybe is there a RabbitMQ setting that I'm missing? I've also look out for it but didn't find anything

Could this be a problem on your end as well?

Gowthaman_Prabhu · July 25, 2022, 7:59am

@MutedJam Neither. No reverse proxy nor load balancer.

Jon · July 25, 2022, 7:59am

Hey @Gowthaman_Prabhu,

How do you have n8n installed?

Gowthaman_Prabhu · July 25, 2022, 8:25am

@jon running n8n as a docker compose service on EC2

Jon · July 25, 2022, 8:44am

@Gowthaman_Prabhu Can you share your compose file? Are you just using EC2 or do you have other services involved as well like say Cloudflare.

Gowthaman_Prabhu · July 25, 2022, 9:07am

@Jon

Jon · July 25, 2022, 9:13am

That looks to be ok, I take it you are not using HTTPS or port 443 to access n8n? Have you tried with the image we supply to see if the issue exists there as well?

Gowthaman_Prabhu · July 27, 2022, 8:37am

@Jon Thank you so much. I had to toggle SSL ON and that fixed it.