Strange error with PHP-FastCGI and nginx

[Paolo Gatti]

Hello, I have a debian 8 with Plesk 12.5.28.

I know that Plask 12.5.28 is not supported, but still I try to ask a question:
I'm using PHP-FastCGI and nginx and in error_log I've these errors when I try to get content from a mobile APP:

[Thu Aug 27 20:48:54.929738 2015] [proxy_fcgi:error] [pid 7437:tid 140222218102528] [client 87.4.233.250:49210] AH01070: Error parsing script headers,
[...]
[Fri Aug 28 10:59:15.694544 2015] [proxy_fcgi:error] [pid 20222:tid 140040654989056] (22)Invalid argument: [client 79.56.178.80:47671] AH01075: Error dispatching request to : (passing brigade to output filters)
[...]
[Fri Aug 28 11:53:56.019421 2015] [proxy_fcgi:error] [pid 1966] [client 95.251.176.221:47083] AH01071: Got error 'Primary script unknown\n'

These errors causes the impossibility to open a simple PDF/DOC/TXT file (in the APP i've only a blank screen, see the attached screenshot). It seems the server can't send the headers of the file. Requests made through web browser works properly.

In access_log I've only this:

95.251.176.221 - - [28/Aug/2015:11:53:56 +0200] "POST /moodle/webservice/rest/server.php?moodlewsrestformat=json HTTP/1.0" 200 5459 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 8_4 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12H143 (5214704816)"

Can you help me please?

Thank you very much, Paolo.

P.S. PHP-FastCGI and nginx are configured as default of Plesk setup.

 

[SibProgrammer]

Can you try to upgrade to Plesk 12.5.30 and check it once again?

 

[bskrakes]

Hello. I too am experiencing the same issue and am currently running the latest update for Plesk 12.5.30 Update #8, last updated at Nov 1, 2015 12:33 PM. When nginx tanks it brings down all of the websites using PHP. Let me know what logs you would like to see.