Facing 502 Bad Gateway? These might be the reasons.

Understanding the 502 Bad Gateway Error

A 502 Bad Gateway error occurs when a reverse proxy server fails to get a valid response from the upstream server (usually the main web server). This prevents the proxy from forwarding the client’s request, resulting in the error.

Common Causes

Upstream server issues: Downtime, failure, or overload.
Reverse proxy misconfiguration.
DNS problems: Incorrect resolution of the upstream server’s IP address.
CDN or cache-related issues.

Solutions

For Website Visitors:

Refresh the page.
Clear your browser’s cache and cookies.
Switch to a different browser or device.

For Website Administrators/Developers:

Review reverse proxy logs for errors.
Check the upstream server’s health and resource usage.
Restart the reverse proxy and upstream server.
Verify DNS configurations for recent changes.
Investigate CDN status or caching layers.

More detailed explaination and troubleshooting advice can be found here: https://pinggy.io/blog/502_bad_gateway_meaning/

Simplify your DevOps and maximize your time.

Since 2007, Heroku has been the go-to platform for developers as it monitors uptime, performance, and infrastructure concerns, allowing you to focus on writing code.

Learn More