I have a eclipse web project source code, the name of the project is “My-Proj” .
I download Eclipse Java EE version (Indigo) , extract the achive, then I started the eclipse IDE. After I successfully installed tomcat7 server into the Eclpse IDE. I import my existing project to Eclipse IDE.
Then I run my imported project by choose “Run on server”, but eclipse pop up the error message window like below:

I saw the port has been used, so I change the server running port by double click on tomcat server V7 under Eclipse “server” tab, and change the port to 8085 as below (see the right side of the image):
Please right click the image and view the image if you can not see clearly.

I run the project on server again , but I got the same error, port 8080 is in use, why? I have changed the port number to 8085, why it still complain the port 8080?
You need to change the one labeled “HTTP/1.1” not “Tomcat admin port” (in your image above on the right hand side where ports are).
Second you probably have an existing tomcat running that was not shutdown (unless you purposely have something else running on 8080). Shutdown eclipse and then look for any running java process that look like tomcat and kill them.