java.util.ConcurrentModificationException at java.util.Hashtable$Enumerator.next(Hashtable.java:1031) at org.openide.util.NbCollections.checkedMapByCopy(NbCollections.java:151) at org.netbeans.spi.project.support.ant.ProjectProperties.getStockPropertyPreprovider(ProjectProperties.java:426) at org.netbeans.spi.project.support.ant.AntProjectHelper.getStockPropertyPreprovider(AntProjectHelper.java:1202) at org.netbeans.modules.java.j2seproject.J2SEProject.createEvaluator(J2SEProject.java:266) at org.netbeans.modules.java.j2seproject.J2SEProject.(J2SEProject.java:213) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(NativeConstructorAccessorImpl.java:0) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.netbeans.modules.project.ant.AntBasedGenericType.createProject(AntBasedGenericType.java:129) at org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.loadProject(AntBasedProjectFactorySingleton.java:266) at org.netbeans.api.project.ProjectManager.createProject(ProjectManager.java:365) at org.netbeans.api.project.ProjectManager.access$300(ProjectManager.java:85) at org.netbeans.api.project.ProjectManager$2.run(ProjectManager.java:286) at org.netbeans.api.project.ProjectManager$2.run(ProjectManager.java:233) at org.openide.util.Mutex.readAccess(Mutex.java:330) at org.netbeans.api.project.ProjectManager.findProject(ProjectManager.java:233) at org.netbeans.modules.projectapi.SimpleFileOwnerQueryImplementation.getOwner(SimpleFileOwnerQueryImplementation.java:131) at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:104) at org.netbeans.modules.csl.core.ProjectClassPathProvider.findClassPath(ProjectClassPathProvider.java:66) at org.netbeans.api.java.classpath.ClassPath.getClassPath(ClassPath.java:632) at org.netbeans.modules.parsing.impl.indexing.errors.ErrorAnnotator$1.run(ErrorAnnotator.java:309) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1973) Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.util.ConcurrentModificationException at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1465) at org.netbeans.modules.parsing.impl.indexing.errors.ErrorAnnotator.enqueue(ErrorAnnotator.java:251) at org.netbeans.modules.parsing.impl.indexing.errors.ErrorAnnotator.isInError(ErrorAnnotator.java:275) at org.netbeans.modules.parsing.impl.indexing.errors.ErrorAnnotator.annotateIcon(ErrorAnnotator.java:123) at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem$StatusImpl.annotateIcon(FileBasedFileSystem.java:324) at org.openide.loaders.DataFolder$FolderNode.getIcon(DataFolder.java:1223) at org.openide.nodes.FilterNode.getIcon(FilterNode.java:569) at org.openide.nodes.FilterNode.getIcon(FilterNode.java:569) at org.netbeans.modules.project.ui.PhysicalView$ProjectIconNode.getIcon(PhysicalView.java:366) at org.openide.nodes.FilterNode.getIcon(FilterNode.java:569) at org.netbeans.modules.project.ui.ProjectsRootNode$BadgingNode.getIcon(ProjectsRootNode.java:798) at org.netbeans.modules.project.ui.ProjectsRootNode$BadgingNode.getIcon(ProjectsRootNode.java:792) at org.openide.explorer.view.VisualizerNode.getIcon(VisualizerNode.java:559) at org.openide.explorer.view.NodeRenderer.configureFrom(NodeRenderer.java:215) at org.openide.explorer.view.NodeRenderer.getTreeCellRendererComponent(NodeRenderer.java:147) at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(BasicTreeUI.java:2712) at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(AbstractLayoutCache.java:475) at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:535) at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:181) at javax.swing.tree.AbstractLayoutCache.getPreferredWidth(AbstractLayoutCache.java:215) at javax.swing.plaf.basic.BasicTreeUI.updateCachedPreferredSize(BasicTreeUI.java:1820) at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1921) at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1909) at javax.swing.JComponent.getPreferredSize(JComponent.java:1634) at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:769) at org.openide.explorer.view.TreeView$ExplorerScrollPaneLayout.layoutContainer(TreeView.java:1828) at java.awt.Container.layout(Container.java:1421) at java.awt.Container.doLayout(Container.java:1410) at java.awt.Container.validateTree(Container.java:1507) at java.awt.Container.validate(Container.java:1480) at org.openide.explorer.view.TreeView.access$101(TreeView.java:151) at org.openide.explorer.view.TreeView$3.run(TreeView.java:688) at org.openide.util.Mutex.readAccess(Mutex.java:365) at org.openide.util.Mutex$1R.run(Mutex.java:1307) at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1324) at org.openide.util.Mutex.readAccess(Mutex.java:354) at org.openide.explorer.view.TreeView.validate(TreeView.java:686) at javax.swing.JViewport.validateView(JViewport.java:498) at javax.swing.JViewport.scrollRectToVisible(JViewport.java:372) at javax.swing.JComponent.scrollRectToVisible(JComponent.java:3065) at org.openide.explorer.view.BeanTreeView.showPathWithoutExpansion(BeanTreeView.java:169) at org.openide.explorer.view.BeanTreeView.showPath(BeanTreeView.java:159) at org.openide.explorer.view.TreeView$5.run(TreeView.java:910) at org.openide.util.Mutex.readAccess(Mutex.java:365) at org.openide.util.Mutex$1R.run(Mutex.java:1307) at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1913) at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1326) at org.openide.util.Mutex.readAccess(Mutex.java:354) at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:682) at org.openide.util.Mutex.doEvent(Mutex.java:1341) at org.openide.util.Mutex.writeAccess(Mutex.java:455) at org.openide.explorer.view.VisualizerNode$QP.runSafe(VisualizerNode.java:664) at org.openide.explorer.view.VisualizerNode.runSafe(VisualizerNode.java:602) at org.openide.explorer.view.TreeView.synchronizeExploredContext(TreeView.java:905) at org.openide.explorer.view.TreeView.lookupExplorerManager(TreeView.java:719) at org.openide.explorer.view.TreeView.addNotify(TreeView.java:698) at java.awt.Container.addNotify(Container.java:2578) at javax.swing.JComponent.addNotify(JComponent.java:4685) at org.openide.windows.TopComponent.addNotify(TopComponent.java:288) at java.awt.Container.addNotify(Container.java:2578) at javax.swing.JComponent.addNotify(JComponent.java:4685) at java.awt.Container.addNotify(Container.java:2578) at javax.swing.JComponent.addNotify(JComponent.java:4685) at org.netbeans.swing.tabcontrol.TabbedContainer.addNotify(TabbedContainer.java:946) at java.awt.Container.addNotify(Container.java:2578) at javax.swing.JComponent.addNotify(JComponent.java:4685) at java.awt.Container.addNotify(Container.java:2578) at javax.swing.JComponent.addNotify(JComponent.java:4685) at java.awt.Container.addNotify(Container.java:2578) at javax.swing.JComponent.addNotify(JComponent.java:4685) at java.awt.Container.addNotify(Container.java:2578) at javax.swing.JComponent.addNotify(JComponent.java:4685) at java.awt.Container.addImpl(Container.java:1068) at java.awt.Container.add(Container.java:927) at org.netbeans.core.windows.view.ui.MainWindow.setDesktop(MainWindow.java:587) at org.netbeans.core.windows.view.ViewHierarchy.setDesktop(ViewHierarchy.java:809) at org.netbeans.core.windows.view.ViewHierarchy.setMainWindowDesktop(ViewHierarchy.java:799) at org.netbeans.core.windows.view.ViewHierarchy.updateDesktop(ViewHierarchy.java:692) at org.netbeans.core.windows.view.DefaultView.showWindowSystem(DefaultView.java:565) at org.netbeans.core.windows.view.DefaultView.windowSystemVisibilityChanged(DefaultView.java:505) at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:187) at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:273) at org.netbeans.core.windows.ViewRequestor.processVisibilityRequest(ViewRequestor.java:262) at org.netbeans.core.windows.ViewRequestor.postVisibilityRequest(ViewRequestor.java:199) at org.netbeans.core.windows.ViewRequestor.scheduleRequest(ViewRequestor.java:121) at org.netbeans.core.windows.Central.setVisible(Central.java:126) at org.netbeans.core.windows.WindowManagerImpl.setVisible(WindowManagerImpl.java:897) at org.netbeans.core.windows.WindowSystemImpl.show(WindowSystemImpl.java:105) at org.netbeans.core.GuiRunLevel$InitWinSys.run(GuiRunLevel.java:249) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641) at java.awt.EventQueue.access$000(EventQueue.java:84) at java.awt.EventQueue$1.run(EventQueue.java:602) at java.awt.EventQueue$1.run(EventQueue.java:600) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:611) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:153) 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)