Any ideas on what the following means? We will probably reboot server to
clear message, but wanting to get more information about this error the
next time it occurs. Any tips on what processes need to be stopped and
restarted so we don't have to restart server next time. This server is
part of a cluster. thanks, Lin

servername: # rcapache2 restart
Syntax OK
Warning: found stale pidfile (unclean shutdown?)
Starting httpd2 (worker) (98)Address already in use: make_sock: could not
bind to address [::]:631
no listening sockets available, shutting down
Unable to open logs
startproc: exit status of parent of /usr/sbin/httpd2-worker: 1