Port 8005 required by Tomcat v7.0 Server at localhost is already in use

Well this error message is thrown when another instance of tomcat is running. Basically the Tom cat server requires the ports 8005,8009,8080 by default. Therefore you need to stop the instance in order to run the server. Also it may happen due to, if some other program is using the particular ports. Therefore you need to resolve the port issue to proceed.