I haven't looked at this code, but in the past this type of error was caused by a missing group/artifact/version element in the lifecycle mappings.
On 26 November 2012 19:30, Marty Kube <[email protected]>wrote: > Hi, > > I'm trying to use m2eclispe with the mahout project. I'm getting a > "Cannot parse lifecycle mapping metadata..." error. When I try to open > project > properties > maven > "lifecycle mapping" to fix the issue I get a > null pointer exception. Screen shot and stack trace from the eclipse error > log are show below. > > Any suggestions? > > http://beavercreekconsulting.com/img/eclipse-mahout-m2eclipse-trouble.png > > > Message: Problems occurred when invoking code from plug-in: > "org.eclipse.jface". > > java.lang.NullPointerException > at > org.eclipse.m2e.core.ui.internal.preferences.LifecycleMappingsViewer.setTarget(LifecycleMappingsViewer.java:553) > at > org.eclipse.m2e.core.ui.internal.preferences.LifecycleMappingPropertyPage.setElement(LifecycleMappingPropertyPage.java:45) > at > org.eclipse.ui.internal.dialogs.RegistryPageContributor.createPage(RegistryPageContributor.java:166) > at > org.eclipse.ui.internal.dialogs.PropertyPageNode.createPage(PropertyPageNode.java:56) > at > org.eclipse.jface.preference.PreferenceDialog.createPage(PreferenceDialog.java:1340) > at > org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.createPage(FilteredPreferenceDialog.java:377) > at > org.eclipse.jface.preference.PreferenceDialog.showPage(PreferenceDialog.java:1231) > at > org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.showPage(FilteredPreferenceDialog.java:675) > at > org.eclipse.jface.preference.PreferenceDialog$10.run(PreferenceDialog.java:709) > at > org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) > at > org.eclipse.jface.preference.PreferenceDialog$9.selectionChanged(PreferenceDialog.java:705) > at > org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:888) > at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) > at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49) > at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) > at > org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:886) > at > org.eclipse.jface.viewers.StructuredViewer.handlePostSelect(StructuredViewer.java:1226) > at > org.eclipse.jface.viewers.StructuredViewer$5.widgetSelected(StructuredViewer.java:1251) > at > org.eclipse.jface.util.OpenStrategy.firePostSelectionEvent(OpenStrategy.java:262) > at org.eclipse.jface.util.OpenStrategy.access$5(OpenStrategy.java:256) > at org.eclipse.jface.util.OpenStrategy$3.run(OpenStrategy.java:433) > at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) > at > org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) > at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3529) > at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3182) > at org.eclipse.jface.window.Window.runEventLoop(Window.java:825) > at org.eclipse.jface.window.Window.open(Window.java:801) > at > org.eclipse.ui.dialogs.PropertyDialogAction.run(PropertyDialogAction.java:158) > at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) > at > org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584) > at > org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501) > at > org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411) > at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) > at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1276) > at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3554) > at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3179) > at > org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1029) > at > org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) > at > org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:923) > at > org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86) > at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588) > at > org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) > at > org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543) > at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) > at > org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124) > at > org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) > at > org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) > at > org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) > at > org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353) > at > org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180) > 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:629) > at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584) > at org.eclipse.equinox.launcher.Main.run(Main.java:1438) > at org.eclipse.equinox.launcher.Main.main(Main.java:1414) > > _______________________________________________ > m2e-users mailing list > [email protected] > https://dev.eclipse.org/mailman/listinfo/m2e-users > >
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