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
private static final String DEFAULT_GROUPING_ENTRY = "defaultGroupingEntry";
	private static final String MARKER_TYPE = "markerType";
	private static final String PRIORITY = "priority"; 
	private static final String MARKER_GROUPING_ENTRY = "markerGroupingEntry"; 
	private static final Object SEVERITY_ID = "org.eclipse.ui.ide.severity";
	private static MarkerSupportRegistry singleton;
	
	private static Object creationLock = new Object();
	/**
	 * Get the instance of the registry.
	 * 
	 * @return MarkerSupportRegistry
	 */
	public static MarkerSupportRegistry getInstance() {
		if (singleton == null) {
			synchronized (creationLock) {
				if (singleton == null) {
					
					singleton = new MarkerSupportRegistry();
				}
			}
		}
		return singleton;
	}
	private Collection registeredFilters = new ArrayList();
	private Map markerGroups = new HashMap();
	private Map markerGroupingEntries = new HashMap();
	private HashMap categories = new HashMap();
	private HashMap hierarchyOrders = new HashMap();
	private MarkerType rootType;