Add n8n Redis Queue Authentication Failure Rule

[dhvll]

This PR addresses the n8n challenge by reproducing and detecting a critical Redis queue authentication failure that causes complete instance outages in production environments.

• Complete instance outage - n8n web interface completely inaccessible
• Silent execution drops - Workflows queued but never processed
• Data loss risk - Critical automations fail without retry mechanisms
• Enterprise impact - Affects scalability and reliability in production deployments

Problem: n8n instances configured with EXECUTIONS_MODE=queue fail to connect to Redis due to authentication mismatches, causing complete instance outages.

Root Causes:

• Redis authentication configuration mismatch between n8n and Redis server
• Incorrect QUEUE_BULL_REDIS_PASSWORD environment variable
• Redis server requires authentication but n8n is configured without password
• Redis server doesn't require authentication but n8n is configured with password

n8n.webm

github access
X Post

playground

/fix #128
/claim #128

[Harsh9485]

References

• n8n Queue Mode Documentation
• n8n Environment Variables
• Redis Security Documentation

Since this is description, using AI is fine, but you should double-check the results. Your links are wrong. 😁

[dhvll]

Sure will check it

[dhvll]

@Lyndon-prequel @tonymeehan can I get a review on the PRs