Apache2 killed (and sometime not restart)

[Wut]

Dear All,

My system is running ispcp Omega 1.0.0RC6 on Linux Debian Etch.

I found problem about apache2 get killed several time. Almost of it are restart to normal operation but some of it not. If I try to start apache2, I'll get message about some process is already listen to port 80 and I have to find id (which is also apache2) and kill it before I can start apache2 again.

I found some error in /var/log/apache2/error.log as below

[Thu Oct 16 11:59:31 2008] [warn] child process 30024 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:31 2008] [warn] child process 30026 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:31 2008] [warn] child process 30086 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:31 2008] [warn] child process 30120 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:31 2008] [warn] child process 30186 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:33 2008] [warn] child process 30024 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:33 2008] [warn] child process 30026 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:33 2008] [warn] child process 30086 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:33 2008] [warn] child process 30186 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:35 2008] [warn] child process 30024 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:35 2008] [warn] child process 30026 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:35 2008] [warn] child process 30086 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:35 2008] [warn] child process 30186 still did not exit, sending a SIGTERM
[Thu Oct 16 11:59:37 2008] [error] child process 30024 still did not exit, sending a SIGKILL
[Thu Oct 16 11:59:37 2008] [error] child process 30026 still did not exit, sending a SIGKILL
[Thu Oct 16 11:59:37 2008] [error] child process 30086 still did not exit, sending a SIGKILL
[Thu Oct 16 11:59:37 2008] [error] child process 30186 still did not exit, sending a SIGKILL
[Thu Oct 16 11:59:38 2008] [notice] caught SIGTERM, shutting down
[Thu Oct 16 11:59:38 2008] [alert] FastCGI: read() from pipe failed (0)
[Thu Oct 16 11:59:38 2008] [alert] FastCGI: the PM is shutting down, Apache seems to have disappeared - bye

Any suggestion will be much appreciate,