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  1. ,
    via Stack Overflow by ERJAN

    This exception occurs when using an older version of java. Mainly when trying to run a jar compiled with a newer Java version in an older Java version. We can avoid this issue by executing the jar in the same version which it was compiled.

  2. ,
    via Google Groups by Marcus Haebler

    Update "latest" to Java 8 on DockerHub.

Solutions on the web

via Stack Overflow by abhiroop goswami
, 2 years ago
java.lang.RuntimeException: org.eclipse.core.runtime.CoreException: Plug-in org.apache.hadoop.eclipse was unable to load class org.apache.hadoop.eclipse.HadoopPerspectiveFactory.
via GitHub by Virtlink
, 7 months ago
java.lang.RuntimeException: Could not instantiate class
via Eclipse Bugzilla by yann.tanguy, 2 years ago
java.lang.ClassCastException: org.eclipse.ui.internal.ErrorViewPart cannot be cast to org.eclipse.papyrus.emf.facet.efacet.ui.internal.exported.view.INavigationView
org.eclipse.e4.core.di.InjectionException: java.lang.RuntimeException: org.eclipse.core.runtime.CoreException: Plug-in org.apache.hadoop.eclipse was unable to load class org.apache.hadoop.eclipse.HadoopPerspectiveFactory. at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:62) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:247) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:229) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132) at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:149) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:196) at org.eclipse.e4.ui.workbench.addons.perspectiveswitcher.PerspectiveSwitcher.selectPerspective(PerspectiveSwitcher.java:661) at org.eclipse.e4.ui.workbench.addons.perspectiveswitcher.PerspectiveSwitcher.access$7(PerspectiveSwitcher.java:657) at org.eclipse.e4.ui.workbench.addons.perspectiveswitcher.PerspectiveSwitcher$11.widgetSelected(PerspectiveSwitcher.java:417) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135) 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:380) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603) at org.eclipse.equinox.launcher.Main.run(Main.java:1465)Caused by: java.lang.RuntimeException: org.eclipse.core.runtime.CoreException: Plug-in org.apache.hadoop.eclipse was unable to load class org.apache.hadoop.eclipse.HadoopPerspectiveFactory. at org.eclipse.ui.internal.registry.PerspectiveDescriptor.createFactory(PerspectiveDescriptor.java:78) at org.eclipse.ui.internal.WorkbenchPage.setPerspective(WorkbenchPage.java:4032) at org.eclipse.ui.handlers.ShowPerspectiveHandler.openPerspective(ShowPerspectiveHandler.java:147) at org.eclipse.ui.handlers.ShowPerspectiveHandler.openOther(ShowPerspectiveHandler.java:119) at org.eclipse.ui.handlers.ShowPerspectiveHandler.execute(ShowPerspectiveHandler.java:58) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:294) 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:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55) ... 38 moreCaused by: org.eclipse.core.runtime.CoreException: Plug-in org.apache.hadoop.eclipse was unable to load class org.apache.hadoop.eclipse.HadoopPerspectiveFactory. at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:194) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:178) 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.registry.PerspectiveDescriptor.createFactory(PerspectiveDescriptor.java:74) ... 49 moreCaused by: java.lang.UnsupportedClassVersionError: org/apache/hadoop/eclipse/HadoopPerspectiveFactory : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at org.eclipse.osgi.internal.loader.ModuleClassLoader.defineClass(ModuleClassLoader.java:285) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.defineClass(ClasspathManager.java:632) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findClassImpl(ClasspathManager.java:588) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:540) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:527) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:324) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:320) at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:395) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:345) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:337) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:568) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174) ... 53 more