Why eclipse is not responding after (Ctrl+shift+r)?

I have a problem with my eclipse.. every time when I try to open .xhtml file using open resource shortcut(Ctrl+Shift+R) my eclipse is going to not responding mode(every thing was grayed out). It is working to open the .java files though.

It worked before with .xhtml files also. please help me out.

error logs

eclipse.buildId=4.3.2.M20140221-1700
java.version=1.6.0_38
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.jee.product

Error
Wed Oct 01 10:33:55 EDT 2014
A workspace crash was detected. The previous session did not exit normally. Not using saved taglib indexes.

and

eclipse.buildId=4.3.2.M20140221-1700
java.version=1.6.0_38
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.jee.product

Error
Wed Oct 01 10:36:02 EDT 2014
Loading web root taglibs for project: Project_Name

java.io.FileNotFoundException: C:\Project_Name\WebContent\WEB-INF\facelets\taglib\facelet-taglib_1_0.dtd (The system cannot find the path specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(Unknown Source)
    at org.eclipse.emf.ecore.resource.impl.FileURIHandlerImpl.createInputStream(FileURIHandlerImpl.java:99)
    at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createInputStream(ExtensibleURIConverterImpl.java:360)
    at org.eclipse.emf.ecore.xmi.impl.XMLHandler.resolveEntity(XMLHandler.java:817)
    at com.sun.org.apache.xerces.internal.util.EntityResolverWrapper.resolveEntity(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.resolveEntityAsPerStax(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at javax.xml.parsers.SAXParser.parse(Unknown Source)
    at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:175)
    at org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:253)
    at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1518)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.TagModelLoader.loadFromInputStream(TagModelLoader.java:103)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.ContextParamSpecifiedFaceletTaglibLocator.createTagRecord(ContextParamSpecifiedFaceletTaglibLocator.java:147)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.ContextParamSpecifiedFaceletTaglibLocator.doLocate(ContextParamSpecifiedFaceletTaglibLocator.java:120)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.AbstractFaceletTaglibLocator.doLocate(AbstractFaceletTaglibLocator.java:1)
    at org.eclipse.jst.jsf.common.internal.locator.AbstractLocator.locate(AbstractLocator.java:96)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.ProjectTaglibDescriptor$1.run(ProjectTaglibDescriptor.java:83)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.ProjectTaglibDescriptor.initialize(ProjectTaglibDescriptor.java:71)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.ProjectTaglibDescriptor.getTagLibraries(ProjectTaglibDescriptor.java:117)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.FaceletTagRegistry.initialize(FaceletTagRegistry.java:183)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.FaceletTagRegistry.getAllTagLibraries(FaceletTagRegistry.java:129)
    at org.eclipse.jst.jsf.facelet.core.internal.registry.FaceletTagRegistry.getTagLibrary(FaceletTagRegistry.java:230)
    at org.eclipse.jst.jsf.facelet.core.internal.metadata.FaceletNamespaceMetaDataLocator.locateMetaDataModelProviders(FaceletNamespaceMetaDataLocator.java:53)
    at org.eclipse.jst.jsf.common.metadata.internal.DomainLoadingStrategy.locateMetaDataSourceInstances(DomainLoadingStrategy.java:143)
    at org.eclipse.jst.jsf.common.metadata.internal.DomainLoadingStrategy.load(DomainLoadingStrategy.java:55)
    at org.eclipse.jst.jsf.common.metadata.internal.MetaDataModel.load(MetaDataModel.java:93)
    at org.eclipse.jst.jsf.common.metadata.internal.MetaDataModelManager.loadMetadata(MetaDataModelManager.java:150)
    at org.eclipse.jst.jsf.common.metadata.internal.MetaDataModelManager.getModel(MetaDataModelManager.java:93)
    at org.eclipse.jst.jsf.common.metadata.query.internal.MetaDataQueryHelper.getMDModel(MetaDataQueryHelper.java:124)
    at org.eclipse.jst.jsf.common.metadata.query.internal.MetaDataQueryHelper.getModel(MetaDataQueryHelper.java:59)
    at org.eclipse.jst.jsf.common.metadata.query.internal.taglib.TaglibDomainMetaDataQuery.findTagLibraryModel(TaglibDomainMetaDataQuery.java:45)
    at org.eclipse.jst.pagedesigner.editors.palette.impl.PaletteHelper.getOrCreateTaglibPaletteDrawer(PaletteHelper.java:133)
    at org.eclipse.jst.pagedesigner.editors.palette.impl.PaletteItemManager.registerHTMLCategory(PaletteItemManager.java:349)
    at org.eclipse.jst.pagedesigner.editors.palette.impl.PaletteItemManager.initTagRegistry(PaletteItemManager.java:313)
    at org.eclipse.jst.pagedesigner.editors.palette.impl.PaletteItemManager.init(PaletteItemManager.java:278)
    at org.eclipse.jst.pagedesigner.editors.palette.impl.PaletteItemManager.getInstance(PaletteItemManager.java:119)
    at org.eclipse.jst.pagedesigner.editors.palette.DesignerPaletteRoot.<init>(DesignerPaletteRoot.java:46)
    at org.eclipse.jst.pagedesigner.editors.palette.DesignerPaletteRootFactory.createPaletteRoot(DesignerPaletteRootFactory.java:112)
    at org.eclipse.jst.pagedesigner.editors.SimpleGraphicalEditor.getPaletteRoot(SimpleGraphicalEditor.java:513)
    at org.eclipse.gef.ui.parts.GraphicalEditorWithFlyoutPalette.setEditDomain(GraphicalEditorWithFlyoutPalette.java:145)
    at org.eclipse.jst.pagedesigner.editors.SimpleGraphicalEditor.<init>(SimpleGraphicalEditor.java:166)
    at org.eclipse.jst.pagedesigner.editors.HTMLEditor.sash_createAndAddDesignSourcePage(HTMLEditor.java:273)
    at org.eclipse.jst.pagedesigner.editors.HTMLEditor.createPages(HTMLEditor.java:453)
    at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:358)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:142)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPartControl(CompatibilityEditor.java:96)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:323)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:877)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:857)
    at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:119)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:333)
    at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:254)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:102)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:71)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:53)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:129)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:949)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:633)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:90)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:41)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
    at org.eclipse.swt.widgets.Display.syncExec(Display.java:4688)
    at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:205)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
    at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
    at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135)
    at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78)
    at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39)
    at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:80)
    at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58)
    at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374)
    at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:171)
    at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:576)
    at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:543)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:619)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:331)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1046)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3112)
    at org.eclipse.ui.internal.WorkbenchPage.access$21(WorkbenchPage.java:3034)
    at org.eclipse.ui.internal.WorkbenchPage$8.run(WorkbenchPage.java:3016)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3012)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2976)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2967)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:534)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:493)
    at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:360)
    at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:167)
    at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:268)
    at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:233)
    at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275)
    at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251)
    at org.eclipse.jdt.internal.ui.navigator.OpenAndExpand.run(OpenAndExpand.java:50)
    at org.eclipse.ui.actions.RetargetAction.run(RetargetAction.java:221)
    at org.eclipse.ui.navigator.CommonNavigatorManager$3.open(CommonNavigatorManager.java:185)
    at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:47)
    at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:866)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
    at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
    at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:864)
    at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1152)
    at org.eclipse.ui.navigator.CommonViewer.handleOpen(CommonViewer.java:462)
    at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1256)
    at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275)
    at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:269)
    at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:309)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4170)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    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:354)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1450)

Thanks

The first error means that Eclipse has crashed. This can leave the workspace in a corrupt state. If nothing else works, try to create a new workspace or use these instructions to clean it.

The second error means that you refer to facelet-taglib_1_0.dtd in one of your files and Eclipse can't find it. Try to add the file to your project. Eclipse might hang here because it tries to download the file from the Internet and that doesn't work for some reason (firewall, missing proxy server, etc).