java.lang.NullPointerException
   at org.netbeans.modules.maven.jaxws.WSUtils.addServlet(WSUtils.java:740)
   at org.netbeans.modules.maven.jaxws.WSUtils.addServicesToDD(WSUtils.java:724)
   at org.netbeans.modules.maven.jaxws.WSUtils.checkNonJSR109Entries(WSUtils.java:920)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider.reactOnPomChanges(MavenJaxWsSupportProvider.java:176)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider.access$000(MavenJaxWsSupportProvider.java:71)
   at org.netbeans.modules.maven.jaxws.MavenJaxWsSupportProvider$1.run(MavenJaxWsSupportProvider.java:79)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)