When adapcctl.sh restart won’t do
Sometimes, when you’ve rolled out new pages to the Application server and use adapcctl.sh restart, the web server won’t respond at all any more.
This is usually caused by a hanging fcgi process. Find the port number in $IAS_APACHE_HOME/Apache/Apache/logs/error_log* and use netstat -p -l | grep <port> to find the culprit.
If that works, but JSP’s still aren’t showing, you have a hanging Jserv. More on that later.
Disclaimer
Any Oracle-related tips are meant for development environments, not production.