无法启动 IBM MQ 资源管理器，出现 java.lang.NoClassDefFoundError

Question

打开 IBM MQ 资源管理器时出错。 之前工作正常，但突然停止工作，我不明白错误，你们能帮忙吗？

打开时显示Error creating the view.

下面是错误：

java.lang.NoClassDefFoundError: org.eclipse.core.resources.IProjectDescription
    at java.lang.J9VMInternals.verifyImpl(Native Method)
    at java.lang.J9VMInternals.verify(J9VMInternals.java:66)
    at java.lang.J9VMInternals.initialize(J9VMInternals.java:127)
    at com.ibm.mq.explorer.tests.Notify.pluginEnabled(Notify.java:96)
    at com.ibm.mq.explorer.ui.internal.base.NotificationManager.notifyPluginEnabled(NotificationManager.java:869)
    at com.ibm.mq.explorer.ui.internal.base.UiPlugin.sendPluginEnablementEvents(UiPlugin.java:2483)
    at com.ibm.mq.explorer.ui.internal.base.UiPlugin.addNavigatorView(UiPlugin.java:1574)
    at com.ibm.mq.explorer.ui.internal.views.MQNavigatorView.createPartControl(MQNavigatorView.java:296)
    at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:370)
    at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:227)
    at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:592)
    at org.eclipse.ui.internal.WorkbenchPage$ActivationList.setActive(WorkbenchPage.java:4080)
    at org.eclipse.ui.internal.WorkbenchPage$17.runWithException(WorkbenchPage.java:3145)
    at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3659)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3296)
    at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:801)
    at org.eclipse.ui.internal.Workbench$25.runWithException(Workbench.java:1342)
    at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3659)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3296)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2309)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
    at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at com.ibm.mq.explorer.ui.rcp.internal.base.RcpApplication.run(RcpApplication.java:145)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:615)
    at org.eclipse.equinox.internal.app.EclipseAppContainer.callMethod(EclipseAppContainer.java:572)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:171)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:615)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1148)

Answer 1

如果它以前有效而现在无效，正如莫拉格所建议的那样，表明某些事情发生了变化。

NoClassDefFoundError错误表示您的 Java 类路径不再指向所需的 .class / .jar 文件。

您的错误堆栈表明您在 Eclipse 上使用 MQ Explorer 连接到 MQ 服务器。 您没有找到 Eclipse 类 - org.eclipse.core.resources.IProjectDescription ，这表明您的 Eclipse 环境已损坏。 您是否在您的机器上升级了 Eclipse 或 Java？

恕我直言，您的标题具有误导性，因为它应该显示为“无法启动 MQ Explorer”。

Answer 2

您粘贴的错误看起来像是经过折腾的 MQ 资源管理器，而不是 MQ 服务器本身。 尝试使用命令行命令来处理您的 MQ。 如果那里一切正常，那么它肯定与您的库中缺少一些 jar 有关。 也试着回忆一下你最近是否改变了什么。