java.lang.IllegalStateException: Should not acquire Children.MUTEX while holding ProjectManager.mutex() at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1805) at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320) at org.openide.util.Mutex.readAccess(Mutex.java:275) at org.openide.explorer.view.TreeView$ExplorerTree$GuardedActions.(TreeView.java:2086) at org.openide.explorer.view.TreeView$ExplorerTree.paint(TreeView.java:1794) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JViewport.paint(JViewport.java:728) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at org.netbeans.swing.tabcontrol.TabbedContainer.paint(TabbedContainer.java:968) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at org.netbeans.core.windows.view.ui.MultiSplitPane.paint(MultiSplitPane.java:325) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at org.netbeans.core.windows.view.ui.MultiSplitPane.paint(MultiSplitPane.java:325) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JLayeredPane.paint(JLayeredPane.java:559) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at javax.swing.JLayeredPane.paint(JLayeredPane.java:559) at javax.swing.JComponent.paintChildren(JComponent.java:843) at javax.swing.JComponent.paint(JComponent.java:1015) at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:34) at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60) at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97) at java.awt.Container.paint(Container.java:1722) at org.netbeans.core.windows.view.ui.MainWindow.paint(MainWindow.java:585) at sun.awt.RepaintArea.paintComponent(RepaintArea.java:276) at sun.awt.RepaintArea.paint(RepaintArea.java:241) at apple.awt.ComponentModel.handleEvent(ComponentModel.java:268) at apple.awt.CWindow.handleEvent(CWindow.java:260) at java.awt.Component.dispatchEventImpl(Component.java:4144) at java.awt.Container.dispatchEventImpl(Container.java:2068) at java.awt.Window.dispatchEventImpl(Window.java:1801) at java.awt.Component.dispatchEvent(Component.java:3903) at java.awt.EventQueue.dispatchEvent(EventQueue.java:463) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:180) at java.awt.Dialog$1.run(Dialog.java:535) at java.awt.Dialog$2.run(Dialog.java:565) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.awt.Dialog.show(Dialog.java:563) at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:985) at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1019) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1007) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:115) at org.openide.util.Mutex.doEventAccess(Mutex.java:1355) at org.openide.util.Mutex.readAccess(Mutex.java:268) at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:992) at java.awt.Component.show(Component.java:1302) at java.awt.Component.setVisible(Component.java:1255) at org.netbeans.core.windows.services.DialogDisplayerImpl$1AWTQuery.showDialog(DialogDisplayerImpl.java:232) at org.netbeans.core.windows.services.DialogDisplayerImpl.notify(DialogDisplayerImpl.java:248) at org.netbeans.core.windows.services.DialogDisplayerImpl.notify(DialogDisplayerImpl.java:146) at org.netbeans.modules.java.j2seproject.ui.customizer.J2SEProjectProperties.showModifiedMessage(J2SEProjectProperties.java:645) at org.netbeans.modules.java.j2seproject.ui.customizer.J2SEProjectProperties.checkModified(J2SEProjectProperties.java:443) at org.netbeans.modules.java.j2seproject.ui.customizer.CustomizerProviderImpl$OptionListener.actionPerformed(CustomizerProviderImpl.java:188) at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener$1.run(CustomizerDialog.java:213) at org.openide.util.Mutex.writeAccess(Mutex.java:394) at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener.actionPerformed(CustomizerDialog.java:211) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:5602) at javax.swing.JComponent.processMouseEvent(JComponent.java:3135) at java.awt.Component.processEvent(Component.java:5367) at java.awt.Container.processEvent(Container.java:2010) at java.awt.Component.dispatchEventImpl(Component.java:4068) at java.awt.Container.dispatchEventImpl(Container.java:2068) at java.awt.Component.dispatchEvent(Component.java:3903) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4256) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3936) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3866) at java.awt.Container.dispatchEventImpl(Container.java:2054) at java.awt.Window.dispatchEventImpl(Window.java:1801) at java.awt.Component.dispatchEvent(Component.java:3903) at java.awt.EventQueue.dispatchEvent(EventQueue.java:463) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)