Bug 85350 [Markers] [Progress] NoClassDefFoundError from job running during shutdown
i200502150800 Got the following exception running Core UI application startup performance tests (the test just exits once the workbench is alive, so it is a very short session). I did not verify the source code, but it seems the runtime plug-in may have already been stopped when the job in question started doing its work. java.lang.NoClassDefFoundError: org/eclipse/core/runtime/jobs/ILock at org.eclipse.ui.views.markers.internal.TableContentProvider.cancelPendingChanges(TableContentProvider.java:342) at org.eclipse.ui.views.markers.internal.TableView.haltTableUpdates(TableView.java:94) at org.eclipse.ui.views.markers.internal.MarkerView.internalRefresh(MarkerView.java:188) at org.eclipse.ui.views.markers.internal.MarkerView.access$3(MarkerView.java:181) at org.eclipse.ui.views.markers.internal.MarkerView$3.run(MarkerView.java:281) at org.eclipse.ui.views.markers.internal.RestartableJob$2.run(RestartableJob.java:85) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:67)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
* 
	 * @param elements
	 */
	void updateFocusMarkers(Object[] elements) {
		boolean updateNeeded = updateNeeded(focusElements, elements);
		if (updateNeeded) {
			focusElements = elements;
			updateFilterSelection(elements);
			refreshViewer();
		}
	}
	private boolean updateNeeded(Object[] oldElements, Object[] newElements) {
		
		MarkerFilter[] filters = getEnabledFilters();
		boolean updateNeeded = false;
		for (int i = 0; i < filters.length; i++) {
			MarkerFilter filter = filters[i];
			if (!filter.isEnabled())
				continue;
			int onResource = filter.getOnResource();
			if (onResource == MarkerFilter.ON_ANY
					|| onResource == MarkerFilter.ON_WORKING_SET) {
				continue;
			}
			if (newElements == null || newElements.length < 1) {
				continue;
			}
			if (oldElements == null || oldElements.length < 1) {
				return true;
			}