... to be completed here you will find an extract of appache2 error_log ...
--> when INTERNAL SERVER ERROR
[Thu Jul 30 04:05:55 2015] [error] [client 10.10.26.15] FastCGI: incomplete headers (0 bytes) received from server "/opt/fourjs/prd/gas/bin/wrapper.fcgi", referer:
http://alfa2.provencale.ad/gas/wa/r/fd520020_bta[Thu Jul 30 04:06:32 2015] [error] [client 10.10.26.7] (146)Connection refused: FastCGI: failed to connect to server "/opt/fourjs/prd/gas/bin/wrapper.fcgi": connect() failed
--> after killing fastcgidisatch
[Thu Jul 30 07:19:17 2015] [warn] FastCGI: server "/opt/fourjs/prd/gas/bin/wrapper.fcgi" (pid 27261) terminated due to uncaught signal '9' (Killed)
[Thu Jul 30 07:19:17 2015] [warn] FastCGI: server "/opt/fourjs/prd/gas/bin/wrapper.fcgi" restarted (pid 6346)
Benjamin