502_ERROR_RESOLUTION.md

502 Error Resolution Report

Date: January 23, 2026
Issue: Generate button returns 502 Bad Gateway
Status: ✅ FIXED

Problem Summary

The generate button on burntbeats.com was returning a 502 Bad Gateway error when users tried to generate songs.

Root Cause

The service on port 8001 (burntbeats-api) was crashing repeatedly due to an import error in /home/ubuntu/app/backend/src/api/v1/health.py:

# Incorrect import (4 dots - goes beyond top-level package)
from ....api.health import router as health_router

This caused the service to crash before it could bind to port 8001, resulting in nginx returning 502 errors when trying to proxy requests.

Solution Applied

Fixed the import statement to use 3 dots instead of 4:

# Corrected import
from ...api.health import router as health_router

File Modified: /home/ubuntu/app/backend/src/api/v1/health.py

Verification

✅ Service Status

• Service is now running on port 8001
• Listening on 127.0.0.1:8001
• No more crashes

✅ 502 Error Resolved

• Nginx can now connect to upstream service
• Generate endpoint no longer returns 502
• Returns proper JSON responses

Current Status

502 Error: ✅ RESOLVED
Service: ✅ RUNNING
Generate Endpoint: ✅ ACCESSIBLE

The generate button should now work correctly (pending model loading for actual generation).

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Fix Applied: January 23, 2026
Status: ✅ RESOLVED