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
if(  refreshUrlsWhenFail && extraDriverLoader.refreshURLs() )
			{
				
				return loadExtraDriver( className, false, driverClassPath );
			}
			
			
			logger.log( Level.FINER, "Driver class not found in drivers directory: " + className );
			return null;
		}
	}
	
	private static class DriverClassLoader extends URLClassLoader
	{
		private Bundle bundle;
		private HashSet fileSet = new HashSet();
		private String driverClassPath;
		public DriverClassLoader( String driverClassPath ) throws OdaException 
		{
			super( new URL[0], DriverClassLoader.class.getClassLoader() );
			logger.entering( DriverClassLoader.class.getName(), "constructor()" );
			this.driverClassPath = driverClassPath;
			bundle = Platform.getBundle( "org.eclipse.birt.report.data.oda.jdbc" );
			if ( bundle == null )
			{
				
				logger.severe( "Failed to get Bundle object" );
			}
			else
			{