java.lang.NullPointerException
   at com.sun.org.apache.xerces.internal.dom.ParentNode.nodeListItem(ParentNode.java:740)
   at com.sun.org.apache.xerces.internal.dom.ParentNode.item(ParentNode.java:796)
   at org.openide.xml.XMLUtil.findElement(XMLUtil.java:941)
   at org.netbeans.modules.maven.M2AuxilaryConfigImpl.getConfigurationFragment(M2AuxilaryConfigImpl.java:193)
   at org.netbeans.modules.projectapi.AuxiliaryConfigImpl$1.run(AuxiliaryConfigImpl.java:85)
   at org.netbeans.modules.projectapi.AuxiliaryConfigImpl$1.run(AuxiliaryConfigImpl.java:81)
   at org.openide.util.Mutex.readAccess(Mutex.java:288)
   at org.netbeans.modules.projectapi.AuxiliaryConfigImpl.getConfigurationFragment(AuxiliaryConfigImpl.java:81)
   at org.netbeans.modules.jmx.common.runtime.J2SEProjectType.isProjectTypeSupported(J2SEProjectType.java:83)
   at org.netbeans.modules.jmx.jconsole.runtime.AntActions$2.enable(AntActions.java:113)
   at org.netbeans.modules.project.ui.actions.MainProjectAction$1.run(MainProjectAction.java:220)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)