我在使用Eclipse Neon时遇到了一个问题，Javadoc突然停止工作。运行 Lubuntu OS， w Eclipse Neon.3，当我点击 F2 按钮时，我在错误日志中得到以下堆栈跟踪：我已经卸载了我在它正常工作之前安装的插件，pydev，xtext，xtend和JHipster插件，仍然是同样的问题。
org.eclipse.e4.core.di.InjectionException: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:282)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:264)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:488)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:286)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:507)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:558)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:378)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:324)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:86)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1605)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1339)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1366)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1349)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1378)
at org.eclipse.swt.widgets.Widget.gtk_key_press_event(Widget.java:764)
at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:3465)
at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:801)
at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2000)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:5827)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5498)
at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)
at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9545)
at org.eclipse.swt.widgets.Display.eventProc(Display.java:1275)
at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2495)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4149)
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)
at org.eclipse.equinox.launcher.Main.main(Main.java:1492)
Caused by: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred
at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:123)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
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)
... 53 more
Caused by: java.lang.NullPointerException
at org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover.getStyleSheet(JavadocHover.java:943)
at org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover.getHoverInfo(JavadocHover.java:747)
at org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover.internalGetHoverInfo(JavadocHover.java:635)
at org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover.getHoverInfo2(JavadocHover.java:627)
at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo2(BestMatchHover.java:164)
at org.eclipse.jdt.internal.ui.text.java.hover.JavaInformationProvider.getInformation2(JavaInformationProvider.java:71)
at org.eclipse.jface.text.information.InformationPresenter.computeInformation(InformationPresenter.java:310)
at org.eclipse.jface.text.AbstractInformationControlManager.doShowInformation(AbstractInformationControlManager.java:1144)
at org.eclipse.jface.text.AbstractInformationControlManager.showInformation(AbstractInformationControlManager.java:1134)
at org.eclipse.jface.text.source.SourceViewer.doOperation(SourceViewer.java:950)
at org.eclipse.jface.text.source.projection.ProjectionViewer.doOperation(ProjectionViewer.java:1461)
at org.eclipse.jdt.internal.ui.javaeditor.JavaSourceViewer.doOperation(JavaSourceViewer.java:196)
at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:201)
at org.eclipse.ui.texteditor.TextOperationAction$1.run(TextOperationAction.java:130)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.texteditor.TextOperationAction.run(TextOperationAction.java:127)
at org.eclipse.ui.texteditor.AbstractTextEditor$InformationDispatchAction.run(AbstractTextEditor.java:1816)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:473)
at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:118)
... 59 more
回复
晚了，但问题是Linux窗口管理器使用了无效的窗口配置，因此SWT（Eclipse GUI引擎）中的所有弹出窗口都崩溃了。将 Linux 中的主题更改为默认值，很好。