Nginx ErrorsError

502 Bad Gateway

errorCodes.nginx-502.name

errorCodes.nginx-502.description

nginxserver

What causes this error

errorCodes.nginx-502.cause

How to fix it

errorCodes.nginx-502.fix

Example

# Check upstream server
curl http://localhost:3000
# Check nginx error log
tail -f /var/log/nginx/error.log
# Verify upstream is running
systemctl status your-app

Official Documentation

Related Error Codes

Nginx ErrorsError

SSL_do_handshake() failed

errorCodes.nginx-ssl-handshake-failed.name

errorCodes.nginx-ssl-handshake-failed.description

Nginx ErrorsWarning

408 Request Timeout

errorCodes.nginx-408-request-timeout.name

errorCodes.nginx-408-request-timeout.description

Nginx ErrorsError

open() failed (13: Permission denied)

errorCodes.nginx-open-failed-permission-denied.name

errorCodes.nginx-open-failed-permission-denied.description

Nginx ErrorsError

500 Internal Server Error

errorCodes.nginx-500.name

errorCodes.nginx-500.description

Nginx ErrorsWarning

499 Client Closed Request

errorCodes.nginx-499.name

errorCodes.nginx-499.description

Nginx ErrorsError

upstream prematurely closed connection

errorCodes.nginx-upstream-prematurely-closed.name

errorCodes.nginx-upstream-prematurely-closed.description