Understanding “408 Request Timeout” on Apache with PHP

Question

Issue description - Apache logs

I found items similar to this one in the Apache log file:

Answer 1

If there is a Proxy set up in Apache, and the back end is not responding in a timely fashion for some reason, the same 408 - - will be seen in the logs. Proxy timeouts are configured separately, that's why changing the Apache default timeout doesn't seem to do anything about those requests.