Nginx giving 502 Bad Gateway in random intervals

[darshan.choudhary]

I am using php 5.3.3 but still not able to find php-fpm in it!! 

http://trainingjunction.in/phpinfo.php

where am i going wrong?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,239181,239210#msg-239210