I have a server on AMAZON EC2 running Nginx +PHP with PHP FASTCGI via port 9000.
The server runs fine for a few minutes and after a while (several thousands of hits in this case) FastCGI Dies and Nginx returns 502 Error.
Nginx log shows
2010/01/12 16:49:24 [error] 1093#0: *9965 connect() failed (111: Connection refused) while connecting to upstream, client: 188.8.131.52, server: localhost, request: "GET /data.php?data=7781 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "site1.mysite.com", referrer: "http://www.othersite.com/subc.asp?t=10"
How can I debug what is causing FastCGI to die?