Bug 173039 Exception is shown when accessing a db on an unknown host
Create a report Add a datasource and specified a invalid host name Click on test connection An oversized error dialog appears showing a stack trace Expected: a simple error such as "Host xxx is not accessible" should be displayed instead.
data/org.eclipse.birt.report.data.oda.jdbc/src/org/eclipse/birt/report/data/oda/jdbc/JDBCDriverManager.java
* Look for the Driver from drivers directory if it not in plugin class path
	 * 
	 * @param className
	 * @return Driver instance
	 * @throws OdaException 
	 */
	private Driver findDriver( String className, String driverClassPath ) throws OdaException
	{
		Class driverClass = null;
		try
		{
			driverClass = Class.forName( className );
			
			logger.info( "Loaded JDBC driver class in class path: " + className );
		}
		catch ( ClassNotFoundException e )
		{
				if ( logger.isLoggable( Level.FINE ) )
				{
					logger.info( "Driver class not in class path: "
							+ className
							+ ". Trying to locate driver in drivers directory" );
				}
				
				driverClass = loadExtraDriver( className, true, driverClassPath );
				
				if ( driverClass == null )
				{
					logger.warning( "Failed to load JDBC driver class: "
							+ className );