Experienced this bug also on 12.04. Seems to come from mod-perl.
# cat /etc/issue
Ubuntu 12.04.2 LTS \n \l
# uname -a
Linux --- 3.2.0-51-virtual #77-Ubuntu SMP Wed Jul 24 20:38:32 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
# dpkg-query -l | grep apache
ii apache2-mpm-prefork 2.2.22-1ubuntu1.4 Apache HTTP Server - traditional non-threaded model
ii apache2-utils 2.2.22-1ubuntu1.4 utility programs for webservers
ii apache2.2-bin 2.2.22-1ubuntu1.4 Apache HTTP Server common binary files
ii apache2.2-common 2.2.22-1ubuntu1.4 Apache HTTP Server common files
ii libapache2-mod-auth-cas 1.0.8-3build1 CAS authentication module for Apache2
ii libapache2-mod-perl2 2.0.5-5ubuntu1 Integration of perl with the Apache2 web server
ii libapache2-reload-perl 0.11-2 module for reloading Perl modules when changed on disk
I resolved the bug by removing libapache2-mod-perl2. In /proc/<pid>/status the process name is showing again "apache2".
Experienced this bug also on 12.04. Seems to come from mod-perl.
# cat /etc/issue
Ubuntu 12.04.2 LTS \n \l
# uname -a
Linux --- 3.2.0-51-virtual #77-Ubuntu SMP Wed Jul 24 20:38:32 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
# dpkg-query -l | grep apache mod-auth- cas 1.0.8-3build1 CAS authentication module for Apache2 mod-perl2 2.0.5-5ubuntu1 Integration of perl with the Apache2 web server reload- perl 0.11-2 module for reloading Perl modules when changed on disk
ii apache2-mpm-prefork 2.2.22-1ubuntu1.4 Apache HTTP Server - traditional non-threaded model
ii apache2-utils 2.2.22-1ubuntu1.4 utility programs for webservers
ii apache2.2-bin 2.2.22-1ubuntu1.4 Apache HTTP Server common binary files
ii apache2.2-common 2.2.22-1ubuntu1.4 Apache HTTP Server common files
ii libapache2-
ii libapache2-
ii libapache2-
I resolved the bug by removing libapache2- mod-perl2. In /proc/<pid>/status the process name is showing again "apache2".
# aptitude remove libapache2- mod-perl2