http://localhost:8080/ Access Error: 404 -- Not Found Cannot locate document: /

A tip for others: if you have NI applications installed, the NI Application Web Server also uses the port 8080.

When I had an error Access Error: 404 -- Not Found I fixed it by doing the following:

1. Open command prompt and type "netstat -aon" (without the quotes)
2. Search for port 8080 and look at its PID number/code.
3. Open Task Manager (CTRL+ALT+DELETE), go to Services tab, and find the service with the exact PID number. Then right click it and stop the process.

I think I figured out the questions after reading the log. Thanks to Will's reminder, I checked the log and found out the some program else is listening to that port. Before I can start to figure out which program, my computer was restarted and localhost:8080 works and showing tomcat page. Whooh