4xx Client errors
408 Request Timeout
The client took too long to send its request.
Common causes
- A slow or interrupted connection.
- Idle keep-alive connections being closed.
How to fix it
- Retry the request. If it happens often, check network quality or raise the server's request timeout.
Find out the moment your site returns 408
Spot Downtime monitors count this as down and alert you, since visitors see an error. (The public “Is it down?” checker treats 4xx answers from big sites as online, because many refuse automated requests.)