enabled: java -Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,address=9001,server=y,suspend=n -jar launchpad/app/target/org.apache.sling.launchpad.app-5-SNAPSHOT.jar (You should see this in the logs: Listening for transport dt_socket at address: 9001) Attach the debugger from eclipse (or use whatever debugger you like): Run -> Debug Configurations Right click Remote Java Application -> New Connect tab: Set Port to 9001 Source tab: