java.lang.IllegalStateException: InitialContextFactoryBuilder already set
        at javax.naming.spi.NamingManager.setInitialContextFactoryBuilder(NamingManager.java:692)
        at org.netbeans.modules.visualweb.dataconnectivity.naming.DesignTimeInitialContextFactory.setInitialContextFactoryBuilder(DesignTimeInitialContextFactory.java:60)
        at org.netbeans.modules.visualweb.dataconnectivity.project.datasource.ProjectDataSourceTracker$ProjectTrackerContextListener.changeFileDataSources(ProjectDataSourceTracker.java:338)
        at org.netbeans.modules.visualweb.dataconnectivity.project.datasource.ProjectDataSourceTracker$ProjectTrackerContextListener.modelChanged(ProjectDataSourceTracker.java:324)
        at org.netbeans.modules.visualweb.insync.ModelSet.fireModelChanged(ModelSet.java:678)
        at org.netbeans.modules.visualweb.insync.Model.fireModelChanged(Model.java:225)
        at org.netbeans.modules.visualweb.insync.models.FacesModel.syncImpl(FacesModel.java:1115)
        at org.netbeans.modules.visualweb.insync.Model.sync(Model.java:219)
        at org.netbeans.modules.visualweb.insync.models.FacesModelSet.getFacesModel(FacesModelSet.java:620)
        at org.netbeans.modules.visualweb.insync.models.FacesModelSet.getFacesModelIfAvailable(FacesModelSet.java:396)
        at org.netbeans.modules.visualweb.designer.jsf.JsfForm.getJsfForm(JsfForm.java:321)
        at org.netbeans.modules.visualweb.designer.jsf.DesignerJsfServiceImpl.createDesignerMultiViewElement(DesignerJsfServiceImpl.java:70)
        at org.netbeans.modules.visualweb.project.jsfloader.JsfJavaEditorSupport$DesignerDesc.createElement(JsfJavaEditorSupport.java:561)
        at org.netbeans.core.multiview.MultiViewModel.getElementForDescription(MultiViewModel.java:206)
        at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:127)
        at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:123)
        at org.netbeans.core.multiview.MultiViewPeer.showCurrentElement(MultiViewPeer.java:272)
        at org.netbeans.core.multiview.MultiViewPeer.peerComponentOpened(MultiViewPeer.java:233)
        at org.netbeans.core.multiview.MultiViewCloneableTopComponent.componentOpened(MultiViewCloneableTopComponent.java:139)
Caused: java.lang.IllegalStateException: [Winsys] TopComponent org.netbeans.core.multiview.MultiViewCloneableTopComponent throws exception/error from its componentOpened() method.
Please repair it! Probable cause is at javax.naming.spi.NamingManager.setInitialContextFactoryBuilder(NamingManager.java:692)
        at org.openide.windows.WindowManager.logThrowable(WindowManager.java:361)
        at org.openide.windows.WindowManager.componentOpenNotify(WindowManager.java:300)
        at org.netbeans.core.windows.WindowManagerImpl.notifyTopComponentOpened(WindowManagerImpl.java:976)
        at org.netbeans.core.windows.Central.addModeOpenedTopComponent(Central.java:764)
        at org.netbeans.core.windows.ModeImpl.addOpenedTopComponent(ModeImpl.java:311)
        at org.netbeans.core.windows.WindowManagerImpl.topComponentOpenAtTabPosition(WindowManagerImpl.java:1084)
        at org.netbeans.core.windows.WindowManagerImpl.topComponentOpen(WindowManagerImpl.java:1051)
        at org.openide.windows.TopComponent.open(TopComponent.java:384)
        at org.openide.windows.TopComponent.open(TopComponent.java:375)
        at org.openide.windows.CloneableOpenSupport.openCloneableTopComponent(CloneableOpenSupport.java:199)
        at org.netbeans.modules.visualweb.project.jsfloader.JsfJavaEditorSupport.doOpenDesigner(JsfJavaEditorSupport.java:175)
        at org.netbeans.modules.visualweb.project.jsfloader.JsfJavaEditorSupport$1.run(JsfJavaEditorSupport.java:157)
        at org.openide.util.Mutex.doEvent(Mutex.java:1335)
        at org.openide.util.Mutex.writeAccess(Mutex.java:452)
        at org.netbeans.modules.visualweb.project.jsfloader.JsfJavaEditorSupport.openDesigner(JsfJavaEditorSupport.java:149)
        at org.netbeans.modules.visualweb.project.jsfloader.JsfJspEditorSupport.openDesigner(JsfJspEditorSupport.java:210)
        at org.netbeans.modules.visualweb.project.jsfloader.JsfJspDataObject$OpenEdit.open(JsfJspDataObject.java:257)
        at org.openide.actions.OpenAction.performAction(OpenAction.java:81)
        at org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:581)
        at org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:77)
        at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:577)
        at org.openide.explorer.view.TreeView$PopupSupport.mouseClicked(TreeView.java:1504)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.Component.processMouseEvent(Component.java:6044)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5806)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4413)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3995)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2440)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        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)