java.lang.IllegalArgumentException: Called DataObject.find on null
   at org.openide.loaders.DataObject.find(DataObject.java:555)
   at org.netbeans.modules.j2ee.dd.impl.web.WebAppProxy.write(WebAppProxy.java:942)
   at org.netbeans.modules.maven.jaxws.WSUtils.addServiceToDD(WSUtils.java:777)
   at org.netbeans.modules.maven.jaxws.MavenJAXWSSupportImpl.addService(MavenJAXWSSupportImpl.java:110)
   at org.netbeans.modules.websvc.jaxws.light.api.JAXWSLightSupport.addService(JAXWSLightSupport.java:137)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider$WebservicesChangeListener.doUpdateJaxWs(MavenJaxWsSupportProvider.java:438)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider$WebservicesChangeListener.access$700(MavenJaxWsSupportProvider.java:317)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider$WebservicesChangeListener$3.run(MavenJaxWsSupportProvider.java:376)
   at org.netbeans.modules.websvc.jaxws.light.api.JAXWSLightSupport.runAtomic(JAXWSLightSupport.java:168)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider$WebservicesChangeListener.updateJaxWs(MavenJaxWsSupportProvider.java:379)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider$WebservicesChangeListener.access$500(MavenJaxWsSupportProvider.java:317)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider$WebservicesChangeListener$1.run(MavenJaxWsSupportProvider.java:327)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)