Bug 307405 [CommonNavigator] Deadlock in NavigatorContentServiceContentProvider
We are using an adopting product and one of our users encountered this deadlock when starting up their workspace: 1LKDEADLOCK Deadlock detected !!! NULL --------------------- NULL 2LKDEADLOCKTHR Thread "main" (0x41591300) 3LKDEADLOCKWTR is waiting for: 4LKDEADLOCKMON sys_mon_t:0x43134548 infl_mon_t: 0x43134580: 4LKDEADLOCKOBJ org/eclipse/ui/internal/navigator/NavigatorSaveablesService@0x05DB48A8/0x05DB48B4: 3LKDEADLOCKOWN which is owned by: 2LKDEADLOCKTHR Thread "Framework Event Dispatcher" (0x42467700) 3LKDEADLOCKWTR which is waiting for: 4LKDEADLOCKMON sys_mon_t:0x43BA6AB8 infl_mon_t: 0x43BA6AF0: 4LKDEADLOCKOBJ org/eclipse/ui/internal/navigator/NavigatorContentServiceContentProvider@0x0306F6E8/0x0306F6F4: 3LKDEADLOCKOWN which is owned by: 2LKDEADLOCKTHR Thread "main" (0x41591300) I will attach the stack trace.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentService.java
}
		contributors.add(getExtension(descriptor));
	}
	
	/**
	 * 
	 * The label provider that is are enabled for the given element.
	 * A label provider is 'enabled' if its corresponding content provider
	 * returned the element.
	 * 
	 * @param anElement
	 *            An element from the tree (any element contributed to the
	 *            tree).
	 * @return The label provider
	 */
	public ILabelProvider[] findRelevantLabelProviders(Object anElement) {
		Collection extensions = findPossibleLabelExtensions(anElement);
		
		if (extensions.size() == 0) {
			return NO_LABEL_PROVIDERS;
		}
		List resultProvidersList = new ArrayList();
		for (Iterator itr = extensions.iterator(); itr.hasNext();) {
			resultProvidersList.add(((NavigatorContentExtension) itr.next()).getLabelProvider());
		}
		return (ILabelProvider[]) resultProvidersList.toArray(new ILabelProvider[resultProvidersList.size()]);
	}
	/**
	 * Search for extensions that declare the given element in their
	 * <b>triggerPoints</b> expression.