我偶尔会收到 500 错误，而且这种情况越来越频繁。查看 apache 错误日志，我发现以下内容。
有人能指出我正确的方向以发现问题的原因吗？
[Mon Apr 14 19:17:26 2014] [info] mod_fcgid: server mysite.com:/var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2617) started
[Mon Apr 14 19:17:29 2014] [info] mod_fcgid: server mysite.com:/var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2620) started
[Mon Apr 14 19:17:44 2014] [info] mod_fcgid: server mysite.com:/var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2628) started
[Mon Apr 14 19:17:44 2014] [info] mod_fcgid: server mysite.com:/var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2629) started
[Mon Apr 14 19:18:08 2014] [debug] fcgid_pm_main.c(357): mod_fcgid: gracefully terminated 2 processes
[Mon Apr 14 19:18:14 2014] [info] mod_fcgid: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2620) exit(lifetime expired), terminated by calling exit(), return code: 0
[Mon Apr 14 19:18:14 2014] [info] mod_fcgid: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2617) exit(lifetime expired), terminated by calling exit(), return code: 0
[Mon Apr 14 19:18:20 2014] [debug] fcgid_pm_main.c(357): mod_fcgid: gracefully terminated 1 processes
[Mon Apr 14 19:18:26 2014] [info] mod_fcgid: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2628) exit(lifetime expired), terminated by calling exit(), return code: 0
[Mon Apr 14 19:18:56 2014] [debug] fcgid_pm_main.c(357): mod_fcgid: gracefully terminated 1 processes
[Mon Apr 14 19:19:02 2014] [warn] mod_fcgid: process 2629 graceful kill fail, sending SIGKILL
[Mon Apr 14 19:19:08 2014] [info] mod_fcgid: process /var/www/cgi-bin/cgi_wrapper/cgi_wrapper(2629) exit(communication error), get stop signal 9