- Plesk 12.5 for Linux
- Plesk Onyx for Linux
The following error appears in domain's error log
CONFIG_TEXT: [proxy_fcgi:error] [pid 22813] [client 203.0.113.2:34554] AH01068: Got bogus version 111, referer: https://one.example.com/tickets/view/80634/
[proxy_fcgi:error] [pid 22813] (22)Invalid argument: [client 203.0.113.2:34554] AH01075: Error dispatching request to : (passing brigade to output filters), referer: https://example.com/
This is confirmed Apache bug reported by the following link: AH01075: Error dispatching request to : (passing brigade to output filters)
When a client disconnects before loading the page completely, the connection between main Apache process and mod_proxy_fcgi is closed and
mod_proxy_fcgi writes to log about not being able to send data to the main process.
The error message can be safely ignored as there is no impact on the website. The bug was fixed in Apache 2.4.16 version.
However, as the workaround, PHP handler can be switched to the one that doesn't require using
- Login into Plesk.
- Domains > example.com > PHP Settings > switch to FastCGI served by Apache or to FPM served by nginx handler: