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 more Caused by: org.eclipse.swt.SWTException: Invalid thread access at 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 more Plug-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