Apache restart unexpectedly

Hello!

In my error.log of apache time to time I see this error:

Code:

[Fri Aug 08 10:41:04 2014] [notice] caught SIGTERM, shutting down
[Fri Aug 08 10:41:12 2014] [error] FastCGI process 27391 still did not exit, terminating forcefully
[Fri Aug 08 10:41:15 2014] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Fri Aug 08 10:41:15 2014] [notice] ModSecurity for Apache/2.6.3 (http://www.modsecurity.org/) configured.
[Fri Aug 08 10:41:15 2014] [notice] ModSecurity: APR compiled version="1.4.6"; loaded version="1.4.6"
[Fri Aug 08 10:41:15 2014] [notice] ModSecurity: PCRE compiled version="8.12"; loaded version="8.12 2011-01-15"
[Fri Aug 08 10:41:15 2014] [notice] ModSecurity: LUA compiled version="Lua 5.1"
[Fri Aug 08 10:41:15 2014] [notice] ModSecurity: LIBXML compiled version="2.7.8"
[Fri Aug 08 10:41:15 2014] [notice] Original server signature: Apache/2.2.22 (Ubuntu)
[Fri Aug 08 10:41:15 2014] [notice] suEXEC mechanism enabled (wrapper: /usr/lib/apache2/suexec)
[Fri Aug 08 10:41:15 2014] [notice] Digest: generating secret for digest authentication ...
[Fri Aug 08 10:41:15 2014] [notice] Digest: done
[Fri Aug 08 10:41:15 2014] [notice] FastCGI: process manager initialized (pid 30723)
[Fri Aug 08 10:41:16 2014] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Fri Aug 08 10:41:16 2014] [notice] Apache/2.2.22 (Ubuntu) DAV/2 mod_fastcgi/mod_fastcgi-SNAP-0910052141 mod_ssl/2.2.22 OpenSSL/1.0.1 Apache/2.2.0 (Fedora) mod_fcgid/2.3.6 PHP/5.3.10-1ubuntu3.13 with Suhosin-Patch mod_ruby/1.2.6 Ruby/1.8.7(2011-06-30) configured -- resuming normal operations
[Fri Aug 08 10:42:02 2014] [notice] caught SIGTERM, shutting down
[Fri Aug 08 10:42:10 2014] [error] FastCGI process 30770 still did not exit, terminating forcefully
[Fri Aug 08 10:42:13 2014] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Fri Aug 08 10:42:13 2014] [notice] ModSecurity for Apache/2.6.3 (http://www.modsecurity.org/) configured.
[Fri Aug 08 10:42:13 2014] [notice] ModSecurity: APR compiled version="1.4.6"; loaded version="1.4.6"
[Fri Aug 08 10:42:13 2014] [notice] ModSecurity: PCRE compiled version="8.12"; loaded version="8.12 2011-01-15"
[Fri Aug 08 10:42:13 2014] [notice] ModSecurity: LUA compiled version="Lua 5.1"
[Fri Aug 08 10:42:13 2014] [notice] ModSecurity: LIBXML compiled version="2.7.8"
[Fri Aug 08 10:42:13 2014] [notice] Original server signature: Apache/2.2.22 (Ubuntu)
[Fri Aug 08 10:42:13 2014] [notice] suEXEC mechanism enabled (wrapper: /usr/lib/apache2/suexec)
[Fri Aug 08 10:42:13 2014] [notice] Digest: generating secret for digest authentication ...
[Fri Aug 08 10:42:13 2014] [notice] Digest: done
[Fri Aug 08 10:42:13 2014] [notice] FastCGI: process manager initialized (pid 30916)
[Fri Aug 08 10:42:14 2014] [warn] Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366)
[Fri Aug 08 10:42:14 2014] [notice] Apache/2.2.22 (Ubuntu) DAV/2 mod_fastcgi/mod_fastcgi-SNAP-0910052141 mod_ssl/2.2.22 OpenSSL/1.0.1 Apache/2.2.0 (Fedora) mod_fcgid/2.3.6 PHP/5.3.10-1ubuntu3.13 with Suhosin-Patch mod_ruby/1.2.6 Ruby/1.8.7(2011-06-30) configured -- resuming normal operations

It is not very often. 2 times on one day. after that can be that 5-7 days everything is ok.

How can I check why apache stop working unexpectedly?
or it is normal?


Thank you.