HTTP 423 Locked vs 502 Bad Gateway
HTTP 423 (Locked) is a 4xx Client Error response, while 502 (Bad Gateway) is a 5xx Server Error response. 423 indicates that the resource is locked and cannot be modified (WebDAV). In contrast, 502 means that the server, acting as a gateway or proxy, received an invalid response from the upstream server.
Description
The resource is locked and cannot be modified (WebDAV).
When You See It
When trying to edit a file that another user has locked in WebDAV.
How to Fix
Wait for the lock to be released, or request the lock owner to unlock it.
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
423 is a 4xx Client Error response, while 502 is a 5xx Server Error response.
HTTP 423: The resource is locked and cannot be modified (WebDAV).
HTTP 502: The server, acting as a gateway or proxy, received an invalid response from the upstream server.
You encounter 423 when when trying to edit a file that another user has locked in WebDAV.
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 423 (Locked): Wait for the lock to be released, or request the lock owner to unlock it. For 502 (Bad Gateway): Check if the upstream server is running. Verify proxy configuration. Check for upstream timeouts.