HTTP 504 Gateway Timeout

What 504 means

The origin is reachable but too slow, often because of long-running queries or overloaded servers.

Common causes

• Slow database queries or API calls.
• Proxy timeout set lower than the app's response time.
• Network problems between the proxy and origin.

How to fix it

1. Optimize slow requests or move them to background jobs.
2. Align proxy and application timeouts.
3. Check origin server load.

How to check a status code

Enter a URL in the HTTP Status Checker to see its status code, every redirect hop, and response time. For redirect-heavy pages, the Website Speed Test shows how much time redirects add.

FAQ

What does HTTP 504 mean?

504 Gateway Timeout is a 5xx server error status code. A gateway or proxy did not get a response from the upstream server in time.

What causes a 504 error?

Slow database queries or API calls. Proxy timeout set lower than the app's response time. Network problems between the proxy and origin.

How do I fix HTTP 504?

Optimize slow requests or move them to background jobs. Align proxy and application timeouts. Check origin server load.