cannot start Tomcat 7 server - java.net.BindException: Address already in use

I was having this problem (port 8005 already being used) and the root cause was due to an existing tomcat process already running on my machine. So, what I needed to do was basically kill the existing process and start up tomcat again.

Go to server.xml file and change

<Server port="8005" shutdown="SHUTDOWN">

to

<Server port="8006" shutdown="SHUTDOWN">

The admin port is for receiving admin commands,and the HTTP port is for receiving HTTP requests. You must use different ports. What happened is: the HTTP connector could not start, because the server already opened that port. Your browser/client/whatever sent the request to the admin port , the server does not understand HTTP and logs this error.

Try Reinstalling Tomcat to another port.