Bug 137356 [Markers] marker grouping not working as expected via markerSupport
N20060418-0010 The Java tooling now warns when a buildpath references an execution environment for which there is no exact match in the workspace (warning support is in HEAD as of today - org.eclipse.jdt.launching and org.eclipse.jdt.debug.ui plugins). The marker created should be categorized as a buildpath problem with other JDT build path problems. To do this, I create a marker support extension as follows (in jdt.debug.ui). <extension point="org.eclipse.ui.ide.markerSupport"> <markerAttributeGrouping defaultGroupingEntry="org.eclipse.jdt.ui.category.buildpath" markerType="org.eclipse.jdt.launching.jreContainerMarker"/> </extension> My understanding is that this should group all markers of type "org.eclipse.jdt.launching.jreContainerMarker" as buildpath problems. JUI has a corresponding grouping entry: <markerGroupingEntry id="org.eclipse.jdt.ui.category.buildpath" markerGrouping="org.eclipse.jdt.ui.java_marker_category" label="%MarkerCategory.buildpath" priority="100"/> I get the following error in the log: Reference to invalid markerGroupingEntry org.eclipse.jdt.ui.category.buildpath
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerSupportRegistry.java
/**
	 * Create a new instance of the receiver and read the registry.
	 */
	private MarkerSupportRegistry() {
		IExtensionTracker tracker = PlatformUI.getWorkbench()
				.getExtensionTracker();
		IExtensionPoint point = Platform.getExtensionRegistry()
				.getExtensionPoint(IDEWorkbenchPlugin.IDE_WORKBENCH,
						MARKER_SUPPORT);
		if (point == null) {
			return;
		}
		IExtension[] extensions = point.getExtensions();
		
		for (int i = 0; i < extensions.length; i++) {
			IExtension extension = extensions[i];
			processExtension(tracker, extension);
		}
		tracker.registerHandler(this, ExtensionTracker
				.createExtensionPointFilter(point));
	}
	/**
	 * Process the extension and register the result with the tracker.
	 * 
	 * @param tracker
	 * @param extension
	 */
	private void processExtension(IExtensionTracker tracker,
			IExtension extension) {
		IConfigurationElement[] elements = extension.getConfigurationElements();