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
* @see org.eclipse.ui.progress.WorkbenchJob#shouldRun()
		 */
		public boolean shouldRun() {
			return buildDone;
		}
		/**
		 * Get the collection of Markers to remove.
		 * 
		 * @param existingMarkers
		 * @return Collection of ConcreteMarker
		 */
		private Collection getExistingMarkers(Collection existingMarkers) {
			if (existingMarkers.isEmpty())
				return Util.EMPTY_COLLECTION;
			Collection toRemove = new ArrayList();
			MarkerList currentList = getCurrentMarkers();
			Iterator removes = existingMarkers.iterator();
			while (removes.hasNext()) {
				Object next = currentList.getMarker((IMarker) removes.next());
				if (next != null)
					toRemove.add(next);
			}
			return toRemove;
		}
		/**
		 * Get the ConcreteMarkers being added after filtering.
		 * 
		 * @param addedMarkers
		 *            Collection of IMarker
		 * @return Collection of ConcreteMarker