HTTP 418 I'm a Teapot vs 502 Bad Gateway
HTTP 418 (I'm a Teapot) is a 4xx Client Error response, while 502 (Bad Gateway) is a 5xx Server Error response. 418 indicates that any attempt to brew coffee with a teapot should result in this error. An April Fools' joke from 1998 that became a beloved part of HTTP culture. In contrast, 502 means that the server, acting as a gateway or proxy, received an invalid response from the upstream server.
Description
Any attempt to brew coffee with a teapot should result in this error. An April Fools' joke from 1998 that became a beloved part of HTTP culture.
When You See It
As an Easter egg on some websites, or when a server humorously refuses a request.
How to Fix
Use a coffee pot instead of a teapot. Or just enjoy the joke.
Description
The server, acting as a gateway or proxy, received an invalid response from the upstream server.
When You See It
When Nginx/Apache can't reach the application server (e.g., Gunicorn is down, upstream timeout).
How to Fix
Check if the upstream server is running. Verify proxy configuration. Check for upstream timeouts.
Key Differences
418 is a 4xx Client Error response, while 502 is a 5xx Server Error response.
HTTP 418: Any attempt to brew coffee with a teapot should result in this error. An April Fools' joke from 1998 that became a beloved part of HTTP culture.
HTTP 502: The server, acting as a gateway or proxy, received an invalid response from the upstream server.
You encounter 418 when as an Easter egg on some websites, or when a server humorously refuses a request.
You encounter 502 when when Nginx/Apache can't reach the application server (e.g., Gunicorn is down, upstream timeout).
When to Use Which
For 418 (I'm a Teapot): Use a coffee pot instead of a teapot. Or just enjoy the joke. For 502 (Bad Gateway): Check if the upstream server is running. Verify proxy configuration. Check for upstream timeouts.