Steps to start Tomcat windows service in Debug mode

*Change Directory under Tomcat bin folder C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\bin

*Run tomcat7w.exe

*Under Java/ Java Options, enter lines above all the -D options -Xdebug -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n Make sure the above 2 lines are in separate lines

REferences - http://wiki.apache.org/tomcat/FAQ/Developing#Q1