Bug 201235 Display text from multi-select parameter is wrong.[0705][0002]
Description: Display text from multi-select parameter is wrong. Build number:2.2.1.v20070827 Steps to reproduce: 1. 1. New a report parameter p1, listbox. 2. Add values like DisplayText/Value v1/1 v2/2. 3. Insert a data item to Layout, Input expression as params["p1"].displayText[0] 4. Preview and select one value, click OK. Expected result: For multi-select parameter, return null for display text or some correct value. Actual result: Display "v" Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/BirtUtility.java
* @throws Exception
	 */
	public static void cancelTask( HttpServletRequest request, String taskid )
			throws Exception
	{
		if ( taskid == null )
			return;
		
		HttpSession session = request.getSession( );
		if ( session == null )
			return;
		Map map = (Map) session.getAttribute( IBirtConstants.TASK_MAP );
		if ( map != null && map.containsKey( taskid ) )
		{
			BaseTaskBean bean = (BaseTaskBean) map.get( taskid );
			if ( bean == null )
				return;
			
			IEngineTask task = bean.getTask( );
			if ( task != null )
			{
				task.cancel( );
			}
			
			synchronized ( map )
			{
				map.remove( taskid );
			}
		}
	}