Bug 273752 syncExec in org.eclipse.ui.internal.navigator.NavigatorContentService.getSourceOfContribution(Object) causes deadlock in test suite
The Platform UI test suite does not complete anymore - it hangs in the org.eclipse.ui.tests.dynamicplugins.EditorTests.testEditorClosure() test case. The hang is in the following code: final boolean[] flag = new boolean[] { false }; FrameworkListener listener = new FrameworkListener() { public void frameworkEvent(FrameworkEvent event) { if (event.getType() == FrameworkEvent.PACKAGES_REFRESHED) synchronized (flag) { flag[0] = true; flag.notifyAll(); } } }; context.addFrameworkListener(listener); packageAdmin.refreshPackages(bundles); synchronized (flag) { while (!flag[0]) { try { flag.wait(); } catch (InterruptedException e) { } } } The flag[0] is never set to true, which probably means that the PACKAGES_REFRESHED event is not fired.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentService.java
*/
	public final String getViewerId() {
		return viewerDescriptor.getViewerId();
	}
	/**
	 * 
	 * @param aDescriptorKey
	 *            A descriptor
	 * @return The cached NavigatorContentExtension from the descriptor
	 */
	public final NavigatorContentExtension getExtension(
			INavigatorContentDescriptor aDescriptorKey) {
		return getExtension(aDescriptorKey, true);
	}
	/**
	 * 
	 * @param aDescriptorKey
	 * @param toLoadIfNecessary
	 *            True if the extension should be loaded if it is not already.
	 * @return The instance of the extension for the given descriptor key.
	 */
	public final NavigatorContentExtension getExtension(
			INavigatorContentDescriptor aDescriptorKey,
			boolean toLoadIfNecessary) {
		
		NavigatorContentExtension extension = (NavigatorContentExtension) contentExtensions
				.get(aDescriptorKey);
		if (extension != null || !toLoadIfNecessary) {
			return extension;
		}