java.lang.NullPointerException
   at org.netbeans.modules.maven.nodes.DependenciesNode$DependenciesComparator.compare(DependenciesNode.java:467)
   at org.netbeans.modules.maven.nodes.DependenciesNode$DependenciesComparator.compare(DependenciesNode.java:455)
   at java.util.TimSort.countRunAndMakeAscending(TimSort.java:352)
   at java.util.TimSort.sort(TimSort.java:216)
   at java.util.Arrays.sort(Arrays.java:1512)
   at java.util.ArrayList.sort(ArrayList.java:1454)
   at java.util.Collections.sort(Collections.java:175)
   at org.netbeans.modules.maven.nodes.DependenciesNode$DependenciesSet.list(DependenciesNode.java:218)
   at org.netbeans.modules.maven.nodes.DependenciesNode$DependenciesChildren.createKeys(DependenciesNode.java:175)
   at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:209)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1484)
   at org.openide.nodes.AsynchChildren.refresh(AsynchChildren.java:133)
   at org.openide.nodes.ChildFactory.refresh(ChildFactory.java:167)
   at org.netbeans.modules.maven.nodes.DependenciesNode$DependenciesChildren.stateChanged(DependenciesNode.java:171)
   at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:356)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:133)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:119)
   at org.netbeans.modules.maven.nodes.DependenciesNode$DependenciesSet.propertyChange(DependenciesNode.java:232)
   at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:215)
   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:564)
   at org.netbeans.modules.maven.api.NbMavenProject.access$200(NbMavenProject.java:94)
   at org.netbeans.modules.maven.api.NbMavenProject$AccessorImpl.doFireReload(NbMavenProject.java:140)
   at org.netbeans.modules.maven.NbMavenProjectImpl$1.run(NbMavenProjectImpl.java:151)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)