Bug 172092 [regression][automation] __maxrows=1 url pattern did not work
steps to reproduce: - preview report using the following url fragment, preview?__report=report/regression_142673.rptdesign&__designer=true&__maxrows=1 expected behavior: - only one data row is displayed actual behavior/: - all data rows are displayed
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
}
	}
	/* (non-Javadoc)
	 * @see org.eclipse.birt.report.engine.api.IEngineTask#cancel()
	 */
	public void cancel( )
	{
		cancelFlag = true;
		executionContext.cancel( );
	}
	
	public void cancel(Object signal)
	{
		if ( signal == null )
		{
			throw new IllegalArgumentException( "signal can't be null" );
		}
		cancelFlag = true;
		long waitingTime = 0;
		do
		{
			waitingTime += 100;
			try
			{
				Thread.sleep( 100 );
			}
			catch ( Exception ex )
			{
			}
			if ( runningStatus != RUNNING_STATUS_RUNNING )