Got weird error today when implementing apache httpd as a reverse proxy on my RHEL environment, here is the complere stacktrace
AH01144: No protocol handler was valid for the URL /url (scheme 'http'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
The only module that i unremark on httpd.conf is mod_proxy.so
LoadModule proxy_module modules/mod_proxy.so
I found out that i need to unremark other module, that is mod_proxy_http
LoadModule proxy_http_module modules/mod_proxy_http.so
After unremarking mod_proxy_http, everything runs well.