我现在已经和这个问题争吵了一段时间。我在CentOS上运行的VPS Plesk 11.0.9上有大约30个客户端站点。
每隔几天，apache / HTTPD突然崩溃，所有客户端站点都无法访问（我仍然可以访问Plesk面板和SSH）。
让它再次运行的唯一方法是登录SSH并运行
# service httpd restart
这是错误日志，（相关区域），如果有人能看到问题是什么，将非常感谢帮助！
[Thu Aug 27 23:30:59 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Aug 27 23:30:59 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Thu Aug 27 23:30:59 2015] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Thu Aug 27 23:30:59 2015] [notice] Apache/2.2.15 (Unix) DAV/2 mod_fcgid/2.3.6 mod_python/3.3.1 Python/2.6.6 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[Fri Aug 28 04:45:59 2015] [warn] mod_fcgid: process 22179 graceful kill fail, sending SIGKILL
[Fri Aug 28 10:05:57 2015] [warn] mod_fcgid: process 26169 graceful kill fail, sending SIGKILL
[Fri Aug 28 14:15:21 2015] [error] server reached MaxClients setting, consider raising the MaxClients setting
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11620
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11641
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11653
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11652
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11624
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11622
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11633
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11660
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11692
[Fri Aug 28 21:43:43 2015] [warn] mod_fcgid: cleanup zombie process 11640
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11697
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11696
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11695
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11694
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11693
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11674
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11669
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11700
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11698
[Fri Aug 28 21:43:47 2015] [warn] mod_fcgid: cleanup zombie process 11632
[Fri Aug 28 21:58:29 2015] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Fri Aug 28 21:58:29 2015] [notice] Digest: generating secret for digest authentication ...
[Fri Aug 28 21:58:29 2015] [notice] Digest: done
[Fri Aug 28 21:58:29 2015] [error] python_init: Python version mismatch, expected '2.6.5', found '2.6.6'.
[Fri Aug 28 21:58:29 2015] [error] python_init: Python executable found '/usr/bin/python'.
[Fri Aug 28 21:58:29 2015] [error] python_init: Python path being used '/usr/lib64/python26.zip:/usr/lib64/python2.6/:/usr/lib64/python2.6/plat-linux2:/usr/lib64/python2.6/lib-tk:/usr/lib64/python2.6/lib-old:/usr/lib64/python2.6/lib-dynload'.
[Fri Aug 28 21:58:29 2015] [notice] mod_python: Creating 4 session mutexes based on 50 max processes and 0 max threads.
[Fri Aug 28 21:58:29 2015] [notice] mod_python: using mutex_directory /tmp
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Fri Aug 28 21:58:29 2015] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
这里又发生了一次：
[Sun Aug 30 18:24:33 2015] [warn] mod_fcgid: process 15544 graceful kill fail, sending SIGKILL
[Sun Aug 30 19:27:05 2015] [warn] mod_fcgid: process 16277 graceful kill fail, sending SIGKILL
[Mon Aug 31 02:58:58 2015] [warn] mod_fcgid: process 32331 graceful kill fail, sending SIGKILL