Debugging with GWT
From OpenKM Documentation
Go to run configurations and add new java application configuration as you can see in this screenshoot
Set the Main class
com.google.gwt.dev.DevMode
Set the program arguments
-port 8080 -noserver -port 8080 -startupUrl /OpenKM/com.openkm.frontend.Main/index.html com.openkm.frontend.Main com.openkm.login.Main
and the VM arguments
-Xmx1000m -Xmx1024M