java.lang.NullPointerException
   at org.netbeans.modules.maven.j2ee.utils.MavenProjectSupport.readSettingsFromPom(MavenProjectSupport.java:489)
   at org.netbeans.modules.maven.j2ee.utils.MavenProjectSupport.getSettings(MavenProjectSupport.java:469)
   at org.netbeans.modules.maven.j2ee.utils.MavenProjectSupport.readServerID(MavenProjectSupport.java:433)
   at org.netbeans.modules.maven.j2ee.utils.MavenProjectSupport.obtainServerIds(MavenProjectSupport.java:259)
   at org.netbeans.modules.maven.j2ee.utils.MavenProjectSupport.changeServer(MavenProjectSupport.java:114)
   at org.netbeans.modules.maven.j2ee.ProjectHookImpl$1.propertyChange(ProjectHookImpl.java:111)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
   at org.netbeans.modules.maven.api.NbMavenProject.doFireReload(NbMavenProject.java:537)
   at org.netbeans.modules.maven.api.NbMavenProject.access$200(NbMavenProject.java:93)
   at org.netbeans.modules.maven.api.NbMavenProject$AccessorImpl.doFireReload(NbMavenProject.java:135)
   at org.netbeans.modules.maven.NbMavenProjectImpl$1.run(NbMavenProjectImpl.java:139)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)