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Support Team,
JSF pages(XHTML extension) do not open in the EDITOR sometimes. The error message is:
Could not open the editor: An unexpected exception was thrown.I have noticed this happens after some period of inactivity. The solution I have found is to restart the IDE. The JSF page opens properly after the restart. However this is a hassle.
Stack Trace:java.lang.NullPointerException at javax.xml.xpath.XPathFactoryFinder._newFactory(XPathFactoryFinder.java:222) at javax.xml.xpath.XPathFactoryFinder.newFactory(XPathFactoryFinder.java:143) at javax.xml.xpath.XPathFactory.newInstance(XPathFactory.java:185) at javax.xml.xpath.XPathFactory.newInstance(XPathFactory.java:99) at org.eclipse.jst.pagedesigner.dtmanager.converter.internal.DTTagConverterDecorator.resolveAttributeValue(DTTagConverterDecorator.java:260) at org.eclipse.jst.pagedesigner.dtmanager.converter.internal.DTTagConverterDecorator.decorateFromDTInfo(DTTagConverterDecorator.java:134) at org.eclipse.jst.pagedesigner.dtmanager.converter.internal.DTTagConverterDecorator.decorate(DTTagConverterDecorator.java:72) at org.eclipse.jst.pagedesigner.dtmanager.converter.internal.DTTagConverter.convertRefresh(DTTagConverter.java:76) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.setModel(ElementEditPart.java:85) at org.eclipse.jst.pagedesigner.parts.HTMLEditPartsFactory.createEditPart(HTMLEditPartsFactory.java:73) at org.eclipse.gef.editparts.AbstractEditPart.createChild(AbstractEditPart.java:249) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:338) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:264) at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) at org.eclipse.jst.pagedesigner.parts.NodeEditPart.addNotify(NodeEditPart.java:104) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.addNotify(ElementEditPart.java:155) at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:339) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:264) at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) at org.eclipse.jst.pagedesigner.parts.NodeEditPart.addNotify(NodeEditPart.java:104) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.addNotify(ElementEditPart.java:155) at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:339) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:264) at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) at org.eclipse.jst.pagedesigner.parts.NodeEditPart.addNotify(NodeEditPart.java:104) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.addNotify(ElementEditPart.java:155) at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:339) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:264) at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) at org.eclipse.jst.pagedesigner.parts.NodeEditPart.addNotify(NodeEditPart.java:104) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.addNotify(ElementEditPart.java:155) at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:339) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:264) at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) at org.eclipse.jst.pagedesigner.parts.NodeEditPart.addNotify(NodeEditPart.java:104) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.addNotify(ElementEditPart.java:155) at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:339) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.refresh(ElementEditPart.java:264) at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) at org.eclipse.jst.pagedesigner.parts.NodeEditPart.addNotify(NodeEditPart.java:104) at org.eclipse.jst.pagedesigner.parts.ElementEditPart.addNotify(ElementEditPart.java:155) at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(AbstractEditPart.java:727) at org.eclipse.jst.pagedesigner.parts.DocumentEditPart.refreshChildren(DocumentEditPart.java:134) at org.eclipse.jst.pagedesigner.parts.DocumentEditPart.refreshChildren(DocumentEditPart.java:126) at org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractEditPart.java:677) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh(AbstractGraphicalEditPart.java:571) at org.eclipse.jst.pagedesigner.parts.DocumentEditPart.refresh(DocumentEditPart.java:114) at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) at org.eclipse.jst.pagedesigner.parts.NodeEditPart.addNotify(NodeEditPart.java:104) at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) at org.eclipse.gef.editparts.SimpleRootEditPart.setContents(SimpleRootEditPart.java:101) at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents(AbstractEditPartViewer.java:601) at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents(AbstractEditPartViewer.java:610) at org.eclipse.jst.pagedesigner.editors.SimpleGraphicalEditor.setModel(SimpleGraphicalEditor.java:428) at com.genuitec.eclipse.jsf.designer.editors.JSFDesignerEditor.connectDesignPage(JSFDesignerEditor.java:287) at com.genuitec.eclipse.jsf.designer.editors.JSFDesignerEditor.createPages(JSFDesignerEditor.java:367) at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:357) at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:662) at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:462) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595) at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313) at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180) at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270) at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65) at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473) at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256) at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209) at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1608) at org.eclipse.ui.internal.PartStack.add(PartStack.java:499) at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103) at org.eclipse.ui.internal.PartStack.add(PartStack.java:485) at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112) at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:63) at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:225) at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:213) at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:778) at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:677) at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:638) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2854) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2762) at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2754) at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2705) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2701) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2685) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2676) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:361) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:168) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:229) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:208) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:250) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:373) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:526) at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48) at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:842) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:48) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:840) at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1101) at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1205) at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:264) at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:258) at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:298) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3910) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514) at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
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