Step 1
Go to the Run/External Tools/External Tools ..." menu item on the"Run" menu bar. Select "Program" and click the "New" button. On the"Main" tab, fill in the "Location:" as the full path to your "mvn"executable. For the "Working Directory:" select the workspace thatmatches your webapp. For "Arguments:" add jetty6:run.
Move to the "Environment" tab and click the "New" button to add a new variable named MAVEN_OPTS with the value:
-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=4000,server=y,suspend=y
If you supply suspend=n instead of suspend=y you can startimmediately without running the debugger and launch the debugger atanytime you really wish to debug.
[edit] Step 2
Then, pull up the "Run/Debug/Debug ..." menu item and select "RemoteJava Application" and click the "New" button. Fill in the dialog byselecting your webapp project for the "Project:" field, and ensure youare using the same port number as you specified in the address=property above.
Now all you need to do is to Run/External Tools and select thename of the maven tool setup you created in step 1 to start the pluginand then Run/Debug and select the name of the debug setup you setup instep2.