java.lang.AssertionError: 
Event: org.openide.explorer.view.VisualizerEvent$Removed
Original event: org.openide.nodes.NodeMemberEvent
current vis. nodes:
Indexes: 0 1 2 3 
org.openide.nodes.NodeMemberEvent[node=org.netbeans.modules.viewmodel.TreeModelNode@197ca56[Name=, displayName='httpSSLWorkerThread-8080-2' running], add=false
  0 at 0
  1 at 1
  2 at 2
  3 at 3
]
curr. snapshot: java.util.Collections$EmptyList
[]
prev. snapshot: org.openide.nodes.EntrySupport$Default$DefaultSnapshot
[org.netbeans.modules.viewmodel.TreeModelNode@58e9d[Name=, displayName=fehlzeitenMBean.checkFaktor:512], org.netbeans.modules.viewmodel.TreeModelNode@168ec96[Name=, displayName=Hidden Source Calls], org.netbeans.modules.viewmodel.TreeModelNode@5cd773[Name=, displayName=ApplicationSessionExpiryFilter.doFilter:97], org.netbeans.modules.viewmodel.TreeModelNode@184ab26[Name=, displayName=Hidden Source Calls]]
        at org.openide.explorer.view.VisualizerChildren.removed(VisualizerChildren.java:249)
        at org.openide.explorer.view.VisualizerEvent$Removed.run(VisualizerEvent.java:132)
        at org.openide.util.Mutex.readAccess(Mutex.java:362)
        at org.openide.util.Mutex$R.run(Mutex.java:1301)
        at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1796)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        at org.openide.util.Mutex.readAccess(Mutex.java:351)
        at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:709)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)