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
logger.log( Level.WARNING, 
						"Failed to register wrapped driver instance.", e);
			}
		}		
		registeredDrivers.put( className, DRIVER_REGISTERED );
	}
	
	/**
	 * Search driver in the "drivers" directory and load it if found
	 * @param className
	 * @return
	 * @throws OdaException 
	 * @throws DriverException
	 * @throws OdaException
	 */
	private Class loadExtraDriver(String className, boolean refreshUrlsWhenFail, String driverClassPath) throws OdaException
	{
		assert className != null;
		
		if( extraDriverLoader == null)
			extraDriverLoader = new DriverClassLoader( driverClassPath );
		
		try
		{
			return extraDriverLoader.loadClass(className);
		}
		catch ( ClassNotFoundException e )
		{