java.lang.AssertionError: Debugger lock taken in AWT Event Queue!
        at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl$DebuggerReentrantReadWriteLock$DebuggerReadLock.lock(JPDADebuggerImpl.java:2127)
        at org.netbeans.modules.debugger.jpda.models.JPDAThreadImpl$ThreadReentrantReadWriteLock$ThreadWriteLock.lock(JPDAThreadImpl.java:1591)
        at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.invokeMethod(JPDADebuggerImpl.java:1083)
        at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.invokeMethod(JPDADebuggerImpl.java:1044)
        at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getToStringValue(AbstractObjectVariable.java:381)
        at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getToStringValue(AbstractObjectVariable.java:342)
        at org.netbeans.modules.web.debug.variablesfilterring.JSPVariablesNodeModelFilter.getShortDescription(JSPVariablesNodeModelFilter.java:170)
        at org.netbeans.spi.viewmodel.Models$CompoundNodeModel.getShortDescription(Models.java:866)
        at org.netbeans.spi.viewmodel.Models$CompoundModel.getShortDescription(Models.java:3222)
        at org.netbeans.modules.viewmodel.TreeModelNode.getShortDescription(TreeModelNode.java:175)
        at org.openide.explorer.view.NodeRenderDataProvider.getTooltipText(NodeRenderDataProvider.java:116)
        at org.netbeans.swing.outline.DefaultOutlineCellRenderer.getTableCellRendererComponent(DefaultOutlineCellRenderer.java:222)
        at javax.swing.JTable.prepareRenderer(JTable.java:5729)
        at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2075)
        at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1977)
        at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1773)
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)
        at javax.swing.JComponent.paintComponent(JComponent.java:763)
        at javax.swing.JComponent.paint(JComponent.java:1027)
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5122)
        at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:277)
        at javax.swing.RepaintManager.paint(RepaintManager.java:1217)
        at javax.swing.JComponent._paintImmediately(JComponent.java:5070)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4880)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:803)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:714)
        at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:694)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
        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:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)