UIMA Ruta: Editor could not be initialized - uima

I am new to UIMA Ruta and I am currently trying to get a simple HelloWorld script to run.
I followed the instructions here to set up my HelloWorld project.
The first error that occured was java.lang.NoClassDefFoundError: org/slf4j/event/Logger which I resolved by converting my project to a maven project and adding the slf4j-api 2.0.0-alpha1 and ruta-core 2.7.0 dependencies to pom.xml.
Now, my HelloWorld script generates an output file to the output folder. But when I try to open it with the UIMA Annotation Editor it says "Editor could not be initialized." with the following details:
java.lang.NullPointerException
at org.apache.uima.cas.impl.CASImpl.createFsFromGenerator(CASImpl.java:1461)
at org.apache.uima.cas.impl.CASImpl.createFSAnnotCheck(CASImpl.java:1413)
at org.apache.uima.cas.impl.CASImpl.createFS(CASImpl.java:1394)
at org.apache.uima.cas.impl.XmiCasDeserializer$XmiCasDeserializerHandler.readFS(XmiCasDeserializer.java:599)
at org.apache.uima.cas.impl.XmiCasDeserializer$XmiCasDeserializerHandler.processDeferredFSs(XmiCasDeserializer.java:2042)
at org.apache.uima.cas.impl.XmiCasDeserializer$XmiCasDeserializerHandler.readFS(XmiCasDeserializer.java:503)
at org.apache.uima.cas.impl.XmiCasDeserializer$XmiCasDeserializerHandler.startElement(XmiCasDeserializer.java:435)
at org.apache.uima.util.XmlCasDeserializer$XmlCasDeserializerHandler.startElement(XmlCasDeserializer.java:148)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.uima.util.XmlCasDeserializer.deserializeR(XmlCasDeserializer.java:109)
at org.apache.uima.util.CasIOUtils.load(CasIOUtils.java:368)
at org.apache.uima.util.CasIOUtils.load(CasIOUtils.java:313)
at org.apache.uima.util.CasIOUtils.load(CasIOUtils.java:194)
at org.apache.uima.util.CasIOUtils.load(CasIOUtils.java:219)
at org.apache.uima.caseditor.editor.DocumentUimaImpl.setContent(DocumentUimaImpl.java:291)
at org.apache.uima.caseditor.editor.DocumentUimaImpl.<init>(DocumentUimaImpl.java:105)
at org.apache.uima.caseditor.ide.DefaultCasDocumentProvider.createDocument(DefaultCasDocumentProvider.java:400)
at org.apache.uima.caseditor.editor.TextDocumentProvider.createDocument(TextDocumentProvider.java:103)
at org.eclipse.ui.texteditor.AbstractDocumentProvider.createElementInfo(AbstractDocumentProvider.java:330)
at org.apache.uima.caseditor.editor.TextDocumentProvider.createElementInfo(TextDocumentProvider.java:135)
at org.eclipse.ui.texteditor.AbstractDocumentProvider.connect(AbstractDocumentProvider.java:395)
at org.eclipse.ui.texteditor.AbstractTextEditor.doSetInput(AbstractTextEditor.java:4187)
at org.eclipse.ui.texteditor.StatusTextEditor.doSetInput(StatusTextEditor.java:260)
at org.apache.uima.caseditor.editor.AnnotationEditor.doSetInput(AnnotationEditor.java:924)
at org.eclipse.ui.texteditor.AbstractTextEditor.lambda$1(AbstractTextEditor.java:3154)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:438)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:354)
at org.eclipse.ui.internal.WorkbenchWindow.lambda$5(WorkbenchWindow.java:2364)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2362)
at org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3171)
at org.eclipse.ui.texteditor.AbstractTextEditor.init(AbstractTextEditor.java:3196)
at org.apache.uima.caseditor.editor.AnnotationEditor.init(AnnotationEditor.java:667)
at org.eclipse.ui.internal.EditorReference.initialize(EditorReference.java:354)
at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:340)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:1001)
at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:966)
at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:139)
at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:411)
at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:333)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:202)
at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:91)
at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:60)
at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:42)
at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:132)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:1015)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:675)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:781)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:752)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:746)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:730)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:107)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:146)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4580)
at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:219)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:234)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:132)
at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElementGen(ElementContainerImpl.java:170)
at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:188)
at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:652)
at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:616)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:791)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:404)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1240)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3209)
at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3114)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3112)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3083)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3074)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:570)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:525)
at org.eclipse.dltk.internal.ui.editor.EditorUtility.openInEditor(EditorUtility.java:380)
at org.eclipse.dltk.internal.ui.editor.EditorUtility.openInEditor(EditorUtility.java:149)
at org.eclipse.dltk.internal.ui.actions.OpenActionUtil.open(OpenActionUtil.java:45)
at org.eclipse.dltk.ui.actions.OpenAction.run(OpenAction.java:265)
at org.eclipse.dltk.ui.actions.OpenAction.run(OpenAction.java:246)
at org.eclipse.dltk.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:282)
at org.eclipse.dltk.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:260)
at org.eclipse.dltk.internal.ui.scriptview.ScriptExplorerActionGroup.handleOpen(ScriptExplorerActionGroup.java:327)
at org.eclipse.dltk.internal.ui.scriptview.ScriptExplorerPart.lambda$2(ScriptExplorerPart.java:629)
at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:796)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:793)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1108)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:270)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:310)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4131)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1056)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3944)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3547)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:635)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:559)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:660)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
at org.eclipse.equinox.launcher.Main.run(Main.java:1468)
The same thing happens when I try to open the ExampleProject in the example-projects folder of the UIMA Ruta project. I know about this question here but it didn't solve my problem.
What am I doing wrong?

At the moment there is no UIMA Ruta Version compatible with UIMA v3. Try downgrading the UIMA Version to 2.10.4 (for instance). For more info please refer to this question.

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im using Eclipse 2018_09 with Vaadin 8. I just created a clean Vaadin Project "myapplication" straight forward. When i create a Vaadin Designer File, "testdesigne.html" and try to open it, the designer is crashing and the file will be closed. It first trys to load the view and crashes after ~5 sec.
When i open the Eclipse Error Log View, i can see following 2 Problems:
Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
java.lang.NullPointerException at
com.vaadin.designer.eclipse.views.HierarchyOutlineView.dispose(HierarchyOutlineView.java:470)
at
com.vaadin.designer.eclipse.editors.VaadinEditorPart.dispose(VaadinEditorPart.java:422)
at
org.eclipse.ui.part.MultiPageEditorPart$4.run(MultiPageEditorPart.java:1014)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at
org.eclipse.ui.part.MultiPageEditorPart.disposePart(MultiPageEditorPart.java:1010)
at
org.eclipse.ui.part.MultiPageEditorPart.dispose(MultiPageEditorPart.java:507)
at
com.vaadin.designer.eclipse.editors.VaadinEditor.dispose(VaadinEditor.java:328)
at
org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.invalidate(CompatibilityPart.java:264)
at
org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.destroy(CompatibilityPart.java:424)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at
org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
at
org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:1001)
at
org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:966)
at
org.eclipse.e4.core.internal.di.InjectorImpl.uninject(InjectorImpl.java:200)
at
org.eclipse.e4.core.internal.di.Requestor.uninject(Requestor.java:175)
at
org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:87)
at
org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:114)
at
org.eclipse.e4.core.internal.contexts.EclipseContext.removeListenersTo(EclipseContext.java:492)
at
org.eclipse.e4.core.contexts.ContextInjectionFactory.uninject(ContextInjectionFactory.java:175)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:967)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:886)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:881)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:865)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.subscribeTopicToBeRendered(PartRenderingEngine.java:186)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at
org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
at
org.eclipse.e4.core.di.internal.extensions.EventObjectSupplier$DIEventHandler.handleEvent(EventObjectSupplier.java:91)
at
org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:204)
at
org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:199)
at
org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
at
org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:233)
at
org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
at
org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:138)
at
org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:81)
at
org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:42)
at
org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
at
org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
at
org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
at
org.eclipse.e4.ui.model.application.ui.impl.UIElementImpl.setToBeRendered(UIElementImpl.java:307)
at
org.eclipse.e4.ui.internal.workbench.PartServiceImpl.hidePart(PartServiceImpl.java:1381)
at
org.eclipse.ui.internal.WorkbenchPage.hidePart(WorkbenchPage.java:1591)
at
org.eclipse.ui.internal.WorkbenchPage.hidePart(WorkbenchPage.java:1543)
at
org.eclipse.ui.internal.WorkbenchPage.closeEditors(WorkbenchPage.java:1513)
at
org.eclipse.ui.internal.WorkbenchPage.closeEditor(WorkbenchPage.java:1637)
at
com.vaadin.designer.eclipse.editors.VaadinEditor.closeEditor(VaadinEditor.java:897)
at
com.vaadin.designer.eclipse.editors.VaadinEditor.closeDesignInNewerProjectAndNotifyUser(VaadinEditor.java:876)
at
com.vaadin.designer.eclipse.editors.VaadinEditor.validateDesignFileInteractive(VaadinEditor.java:816)
at
com.vaadin.designer.eclipse.editors.VaadinEditorPart$2$1.run(VaadinEditorPart.java:185)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40) at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
at sun.reflect.GeneratedMethodAccessor74.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at
com.vaadin.designer.eclipse.editors.FakeComposite.flushAsyncQueue(FakeComposite.java:166)
at
com.vaadin.designer.eclipse.editors.FakeComposite.flushAsyncQueue(FakeComposite.java:140)
at
com.vaadin.designer.eclipse.editors.FakeComposite.setLayoutDeferred(FakeComposite.java:127)
at
org.eclipse.swt.widgets.Display.runDeferredLayouts(Display.java:3982)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3554)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
at
org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:628) at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:563)
at
org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:151)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:199)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:391)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:246)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at
org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:595) at
org.eclipse.equinox.launcher.Main.run(Main.java:1501)
Unhandled event loop exception
java.lang.NullPointerException at
org.eclipse.ui.internal.PartSite.getShell(PartSite.java:477) at
com.vaadin.designer.eclipse.editors.VaadinEditor.openDesigner2InstallWarning(VaadinEditor.java:886)
at
com.vaadin.designer.eclipse.editors.VaadinEditor.closeDesignInNewerProjectAndNotifyUser(VaadinEditor.java:878)
at
com.vaadin.designer.eclipse.editors.VaadinEditor.validateDesignFileInteractive(VaadinEditor.java:816)
at
com.vaadin.designer.eclipse.editors.VaadinEditorPart$2$1.run(VaadinEditorPart.java:185)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40) at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
at sun.reflect.GeneratedMethodAccessor74.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at
com.vaadin.designer.eclipse.editors.FakeComposite.flushAsyncQueue(FakeComposite.java:166)
at
com.vaadin.designer.eclipse.editors.FakeComposite.flushAsyncQueue(FakeComposite.java:140)
at
com.vaadin.designer.eclipse.editors.FakeComposite.setLayoutDeferred(FakeComposite.java:127)
at
org.eclipse.swt.widgets.Display.runDeferredLayouts(Display.java:3982)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3554)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
at
org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:628) at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:563)
at
org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:151)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:199)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:391)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:246)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at
org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:595) at
org.eclipse.equinox.launcher.Main.run(Main.java:1501)
anyone any idea how to solve this?
Use Vaadin Designer 2 for Vaadin 8.

Eclipse plugin - Caused by: java.lang.ClassNotFoundException : clazz cannot be found by

I've successfully created an Eclipse-plugin to which I'm adding a command in order to wrap some text with <xsl:text>.
My environment is Win 7 x64, Eclipse Mars, Java 1.7.
In order to implement this feature, I just copy/pasted the org.eclipse.wst.sse.ui.internal.handlers.ToggleLineCommentHandler class which in turn uses some internal classes among which CommentingStrategy.
I'm aware that non API class are marked x-friends in the plugin MANIFEST so that it gives an error at compile time which you can turn off, as Warning in my case...
But then at Runtime I'm getting the below error despite my plugin dependencies is correctly set :
And here is my MANIFEST :
So, is it absolutely forbidden to use eclipse internal classes ??
If so, how can I achieve my purpose which is simply textifying some characters in an XML file by surrounding them with <xsl:text> tag the same way as for the ToggleLineComment.
Thanks for your answers !
java.lang.NoClassDefFoundError: org/eclipse/wst/sse/ui/internal/comment/CommentingStrategy
at com.aksu.tools.tgs.handlers.TextifyHandler.processAction(TextifyHandler.java:112)
at org.eclipse.wst.sse.ui.internal.handlers.AbstractCommentHandler.execute(AbstractCommentHandler.java:62)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:295)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:252)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:234)
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:493)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:486)
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:1266)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1112)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1137)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1122)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1164)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1160)
at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1581)
at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4795)
at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:343)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4676)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5050)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3767)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
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(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
at org.eclipse.equinox.launcher.Main.main(Main.java:1488)
Caused by: java.lang.ClassNotFoundException: org.eclipse.wst.sse.ui.internal.comment.CommentingStrategy cannot be found by com.aksu.tools.tgs_1.0.0
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:439)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 60 more

Eclipse Plugin: Installs correctly, but gives errors on use

I have developed a plugin for Eclipse. When debugging/testing it through "Launch an application" provided by the IDE it works perfectly, however, when I install it to the host it does not work while it does install correctly.
Errors include:
I was wondering if somebody could point me in the correct direction for enabling this plugin to work.
Stack Trace:
org.eclipse.core.runtime.CoreException: Plug-in Recognise was unable to load class recognise.handlers.VoiceHandler.
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.handlers.HandlerProxy.loadHandler(HandlerProxy.java:354)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:288)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:252)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:234)
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:493)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:486)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:799)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.handleWidgetSelection(HandledContributionItem.java:675)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.access$7(HandledContributionItem.java:659)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$4.handleEvent(HandledContributionItem.java:592)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4180)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3769)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
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(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
Caused by: java.lang.ClassNotFoundException: recognise.handlers.VoiceHandler cannot be found by Recognise_1.0.0.201603261752
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:439)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:573)
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)
... 48 more
Build properties above, I have added way more than necessary, just to make sure that these handlers are in fact added. Still no change.
Your build.properties should have an entry for '.' in the 'bin.includes' entry:
bin.includes = META-INF/,\
.,\
plugin.xml,\
icons/,\
res/,\
OSGI-INF/,\
lib/
Do not include 'bin' in this list.

Exception : Method org.postgresql.jdbc4.Jdbc4Connection.isValid(int) is not yet implemented

Though this question has asked, the answer could not solve my problem.
I used commons-dbcp2-2.1.1.jarandpostgres jdbc driver. I checked postgresql-8.4-702.jdbc4.jar, postgresql-9.1-901.jdbc4.jar, postgresql-9.2-1004.jdbc4.jar, postgresql-9.3-1103.jdbc4.jar, postgresql-9.3-1103.jdbc41.jar, postgresql-9.4-1202.jdbc4.jar and postgresql-9.4-1202.jdbc41.jar one after another. But none of the implement the isValid function and always throw exception.
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot create PoolableConnectionFactory (Method org.postgresql.jdbc4.Jdbc4Connection.isValid(int) is not yet implemented.)] with root cause
org.postgresql.util.PSQLException: Method org.postgresql.jdbc4.Jdbc4Connection.isValid(int) is not yet implemented.
at org.postgresql.Driver.notImplemented(Driver.java:753)
at org.postgresql.jdbc4.AbstractJdbc4Connection.isValid(AbstractJdbc4Connection.java:102)
at org.postgresql.jdbc4.Jdbc4Connection.isValid(Jdbc4Connection.java:21)
at org.apache.commons.dbcp2.DelegatingConnection.isValid(DelegatingConnection.java:918)
at org.apache.commons.dbcp2.PoolableConnection.validate(PoolableConnection.java:283)
at org.apache.commons.dbcp2.PoolableConnectionFactory.validateConnection(PoolableConnectionFactory.java:357)
at org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:2307)
at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:2290)
at org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2039)
at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1533)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82)
at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68)
at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:315)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:75)
at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:61)
at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:303)
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:154)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:102)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:82)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:120)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:113)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)
at com.sun.proxy.$Proxy9.selectList(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:205)
at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:122)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:64)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
at com.sun.proxy.$Proxy20.getAllParty(Unknown Source)
at com.votersvoicemyanmar.resource.ArticleController.getAllArticles(ArticleController.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Any solution?
There is more than one copy of the JDBC driver on the CLASSPATH.
Check the output of org.postgresql.Driver.getVersion ()

NoClassDefFoundError Exception: from SpringJPA

I don't understand why I am getting this exception.
It seems to be related to JPA but there aren't any JPA annotation in XxxService or unable to find the class XxxService
java.lang.NoClassDefFoundError: Lcom/xxx/xxx/xxx/XxxService;
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.getDeclaredFields(Unknown Source)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:374)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:322)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:830)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:493)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:605)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:925)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:472)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1213)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1026)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4421)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4734)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
You do not have the class file for XxxService in your classpath.
Add the jar file (with this class) to the classpath and the issue will be resolved.