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
refreshURLs();
			}
		}
		
		/**
		 * Refresh the URL list of DriverClassLoader
		 * @return if the refreshURL is different than the former one then return true otherwise
		 * 			return false
		 * @throws OdaException 
		 */
		public boolean refreshURLs() throws OdaException
		{
			if ( bundle == null )
				return false;			
			
			
			boolean foundNew = false;
			
			if( driverClassPath != null )
			{
				try
				{
					File driverClassFile = new File( driverClassPath );
					if ( driverClassFile.exists( ) )
					{
						this.addURL( driverClassFile.toURI().toURL( ) );
						
						if ( driverClassFile.isDirectory( ) )
						{
							File[] driverFiles = driverClassFile.listFiles( new FileFilter(){