Plug-in org.eclipse.wst.jsdt.ui was unable to load class org.eclipse.wst.jsdt.internal.ui.javaeditor

1、错误描述

org.eclipse.core.runtime.CoreException: Plug-in org.eclipse.wst.jsdt.ui was unable to load class org.eclipse.wst.jsdt.internal.ui.javaeditor.CompilationUnitEditor.at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:194)at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:176)at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:291)at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:286)at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:235)at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:329)at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPart(CompatibilityPart.java:278)at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPart(CompatibilityEditor.java:63)at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:316)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:966)at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:931)at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:151)at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:375)at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:294)at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162)at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:105)at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:74)at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:56)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:975)at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:651)at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:104)at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:40)at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:233)at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:145)at org.eclipse.swt.widgets.Display.syncExec(Display.java:4821)at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:211)at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:36)at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:201)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:94)at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:60)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:173)at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:617)at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:581)at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:770)at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:401)at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1214)at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3261)at org.eclipse.ui.internal.WorkbenchPage.access$25(WorkbenchPage.java:3176)at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:3158)at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3153)at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3117)at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3107)at org.eclipse.ui.ide.IDE.openEditor(IDE.java:563)at org.eclipse.ui.ide.IDE.openEditor(IDE.java:518)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:256)at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:221)at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:271)at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:249)at org.eclipse.jdt.internal.ui.navigator.OpenAndExpand.run(OpenAndExpand.java:50)at org.eclipse.ui.actions.RetargetAction.run(RetargetAction.java:225)at org.eclipse.ui.navigator.CommonNavigatorManager$2.open(CommonNavigatorManager.java:191)at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:46)at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:855)at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:852)at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1169)at org.eclipse.ui.navigator.CommonViewer.handleOpen(CommonViewer.java:451)at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:278)at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:272)at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:313)at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4236)at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3824)at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)at org.eclipse.equinox.launcher.Main.run(Main.java:1519)Caused by: java.lang.ClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.wst.jsdt.ui (866).at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:116)at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:529)at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:325)at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:345)at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:423)at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:372)at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:364)at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:564)at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)at org.eclipse.core.internal.filebuffers.ExtensionsRegistry.getExtension(ExtensionsRegistry.java:224)at org.eclipse.core.internal.filebuffers.ExtensionsRegistry.doGetDocumentSetupParticipants(ExtensionsRegistry.java:352)at org.eclipse.core.internal.filebuffers.ExtensionsRegistry.getDocumentSetupParticipants(ExtensionsRegistry.java:369)at org.eclipse.core.internal.filebuffers.ResourceExtensionRegistry.getDocumentSetupParticipants(ResourceExtensionRegistry.java:121)at org.eclipse.core.internal.filebuffers.ResourceTextFileBufferManager.createEmptyDocument(ResourceTextFileBufferManager.java:138)at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.initializeFileBufferContent(ResourceTextFileBuffer.java:264)at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.create(ResourceFileBuffer.java:248)at org.eclipse.core.internal.filebuffers.TextFileBufferManager.connect(TextFileBufferManager.java:112)at org.eclipse.wst.sse.core.internal.FileBufferModelManager.getModel(FileBufferModelManager.java:786)at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._doCommonGetModel(ModelManagerImpl.java:548)at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._commonGetModel(ModelManagerImpl.java:512)at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._commonGetModel(ModelManagerImpl.java:485)at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.getModelForRead(ModelManagerImpl.java:1443)at org.eclipse.wst.sse.core.internal.validate.ValidatorGroupListener.validationStarting(ValidatorGroupListener.java:91)at org.eclipse.wst.validation.internal.ValManager$2.run(ValManager.java:854)at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)at org.eclipse.wst.validation.internal.ValManager.notifyGroupListenersStarting(ValManager.java:852)at org.eclipse.wst.validation.internal.ValManager.accept(ValManager.java:807)at org.eclipse.wst.validation.internal.ValManager.validate(ValManager.java:669)at org.eclipse.wst.validation.internal.ValBuilderJob$Visitor.visit(ValBuilderJob.java:327)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:64)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:48)at org.eclipse.wst.validation.internal.ValBuilderJob.deltaBuild(ValBuilderJob.java:211)at org.eclipse.wst.validation.internal.ValBuilderJob.run(ValBuilderJob.java:179)at org.eclipse.wst.validation.internal.ValBuilderJob.runInWorkspace(ValBuilderJob.java:126)at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39)at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)Caused by: org.osgi.framework.BundleException: Exception in org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.start() of bundle org.eclipse.wst.jsdt.ui.at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:795)at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:724)at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:932)at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:309)at org.eclipse.osgi.container.Module.doStart(Module.java:581)at org.eclipse.osgi.container.Module.start(Module.java:449)at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:470)at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)... 47 moreCaused by: org.eclipse.swt.SWTException: Invalid thread accessat org.eclipse.swt.SWT.error(SWT.java:4533)at org.eclipse.swt.SWT.error(SWT.java:4448)at org.eclipse.swt.SWT.error(SWT.java:4419)at org.eclipse.jface.resource.FontRegistry.calculateDefaultFont(FontRegistry.java:516)at org.eclipse.jface.resource.FontRegistry.defaultFontRecord(FontRegistry.java:560)at org.eclipse.jface.resource.FontRegistry.defaultFontData(FontRegistry.java:573)at org.eclipse.jface.resource.FontRegistry.getFontData(FontRegistry.java:589)at org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.ensurePreferenceStoreBackwardsCompatibility(JavaScriptPlugin.java:405)at org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.start(JavaScriptPlugin.java:336)at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:774)at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1)at java.security.AccessController.doPrivileged(Native Method)at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:767)... 54 morePlug-in org.eclipse.wst.jsdt.ui was unable to load class org.eclipse.wst.jsdt.internal.ui.javaeditor

2、错误原因

     eclipse一直在加载校验中，关闭eclipse后再次打开，无法打开JavaScript文件；提示上述错误。

     由错误提示可知，是eclipse中的编译器类加载失败

3、解决办法

（1）最直接的办法

        删除eclipse工作空间的.metadata文件夹

（2）切换工作空间