4.0.0 org.glassfish.main.featuresets featuresets 9.0.0-M2 debug This project can be used as entry project in remote debugging, giving one most dependencies of GlassFish to step through the source. Compile GF with mvn clean install -Pfastest,source -T10 Start GF with ./adadmin start-domain --verbose --suspend In the IDE, for instance, Eclipse, go to run - debug configurations - remote java application - project And add this project there. Debug jakarta.el jakarta.el-api org.osgi osgi.core org.osgi org.osgi.service.resolver 1.1.1 org.apache.felix org.apache.felix.resolver org.apache.felix org.apache.felix.framework org.apache.felix org.apache.felix.main org.glassfish.grizzly grizzly-framework org.glassfish.grizzly grizzly-portunif org.glassfish.grizzly grizzly-http org.glassfish.grizzly grizzly-http2 org.glassfish.grizzly grizzly-npn-api org.glassfish.grizzly grizzly-http-server org.glassfish.main.featuresets glassfish ${project.version} pom org.glassfish.main.featuresets web ${project.version} pom org.glassfish.main.featuresets nucleus ${project.version} pom org.glassfish.main.featuresets atomic ${project.version} pom org.glassfish.main.jdbc.jdbc-ra.jdbc-core jdbc-core ${project.version}