Apache not working

[ronnyj]

Hello, mine is a VPS with Plesk 11.0.9 and Centos0 6.3.
It's a new machine so I haven't made any particular configuration.
Suddenly the webserver goes down and the websites are not visible from the internet, I can't start apache and I have to restart the server.
This happen 2-3 times per day.

I checked the /var/log/httpd/error_log but I'm a novice about apache and Linux so I can't figure out the problem and I would appreciate if you could help me about this:
[Sun Feb 24 20:59:00 2013] [warn] mod_fcgid: cleanup zombie process 5691
[Sun Feb 24 21:39:32 2013] [emerg] (22)Invalid argument: mod_fcgid: can't lock process table in PM, pid 1184
[Sun Feb 24 21:42:11 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Sun Feb 24 21:42:11 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:42:11 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:42:11 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:42:11 2013] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Sun Feb 24 21:42:11 2013] [notice] Digest: generating secret for digest authentication ...
[Sun Feb 24 21:42:11 2013] [notice] Digest: done
[Sun Feb 24 21:42:11 2013] [error] python_init: Python version mismatch, expected '2.6.5', found '2.6.6'.
[Sun Feb 24 21:42:11 2013] [error] python_init: Python executable found '/usr/bin/python'.
[Sun Feb 24 21:42:11 2013] [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'.
[Sun Feb 24 21:42:11 2013] [notice] mod_python: Creating 4 session mutexes based on 50 max processes and 0 max threads.
[Sun Feb 24 21:42:11 2013] [notice] mod_python: using mutex_directory /tmp
[Sun Feb 24 21:42:11 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:42:11 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:42:11 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:42:11 2013] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Sun Feb 24 21:42:11 2013] [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/1.0.0-fips mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[Sun Feb 24 21:49:28 2013] [notice] caught SIGTERM, shutting down
[Sun Feb 24 21:49:29 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Sun Feb 24 21:49:29 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:29 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:29 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:29 2013] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Sun Feb 24 21:49:29 2013] [notice] Digest: generating secret for digest authentication ...
[Sun Feb 24 21:49:29 2013] [notice] Digest: done
[Sun Feb 24 21:49:29 2013] [error] python_init: Python version mismatch, expected '2.6.5', found '2.6.6'.
[Sun Feb 24 21:49:29 2013] [error] python_init: Python executable found '/usr/bin/python'.
[Sun Feb 24 21:49:29 2013] [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'.
[Sun Feb 24 21:49:29 2013] [notice] mod_python: Creating 4 session mutexes based on 50 max processes and 0 max threads.
[Sun Feb 24 21:49:29 2013] [notice] mod_python: using mutex_directory /tmp
[Sun Feb 24 21:49:29 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:29 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:29 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:29 2013] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Sun Feb 24 21:49:54 2013] [notice] Digest: generating secret for digest authentication ...
[Sun Feb 24 21:49:54 2013] [notice] Digest: done
[Sun Feb 24 21:49:54 2013] [error] python_init: Python version mismatch, expected '2.6.5', found '2.6.6'.
[Sun Feb 24 21:49:54 2013] [error] python_init: Python executable found '/usr/bin/python'.
[Sun Feb 24 21:49:54 2013] [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'.
[Sun Feb 24 21:49:54 2013] [notice] mod_python: Creating 4 session mutexes based on 50 max processes and 0 max threads.
[Sun Feb 24 21:49:54 2013] [notice] mod_python: using mutex_directory /tmp
[Sun Feb 24 21:49:54 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:54 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:54 2013] [warn] RSA server certificate CommonName (CN) `Parallels Panel' does NOT match server name!?
[Sun Feb 24 21:49:54 2013] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Sun Feb 24 21:49:54 2013] [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/1.0.0-fips mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations

 

[IgorG]

I'm not sure about your Virtualization system but I saw this on Virtuozzo VPSses when kernel sent graceful SIGTERM (Signal 15) to processes in VPS due to lack of resources for all VPSes on hardware node. It can be found in /var/log/messages on Virtuozzo hardware node.
Also I can recommend to use watchdog. It will restart Apache automatically after unexpected stopping.

 

[ronnyj]

Hi Igor, a lack of resources seems to be the problem, I've just increased the RAM and I'm testing out the system.
Thank you for your support.