Kintify Fix · nginx
Kintify Fix: Nginx 502 Bad Gateway
Kintify Fix answer
Check nginx error log for the specific reason, then curl the upstream directly from the nginx host. before rolling back.
Generated using Kintify Fix — production-safe recommendations
Nginx 502 is an upstream problem. The error log shows the exact cause — connection refused, timeout, or premature close.
Check nginx error log for the specific reason and curl the upstream directly from the nginx host.
Kintify Fix tool
Kintify Fix steps
- 1
Tail nginx error log for the specific reason
- 2
Curl the upstream directly from the nginx host
- 3
Increase `proxy_read_timeout` if needed
Common causes
- Upstream app not listening on the expected port
- Upstream timed out (slow endpoint)
- Upstream closed connection (crash/restart)
Kintify Fix FAQ
- What causes Nginx 502 Bad Gateway?
- Upstream app not listening on the expected port and Upstream timed out (slow endpoint) are the most common causes.
- How do I fix Nginx 502 Bad Gateway?
- Check nginx error log for the specific reason, then curl the upstream directly from the nginx host.