Bug 315315 Warning messages seen while starting up workbench
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/util/PluginSettings.java
if ( ps == null )
		{
			ps = new PluginSettings( );
			String loggingDir = null;
			Level loggingLevel = null;
			if ( config != null )
			{
				ps.bStandalone = config.getProperty( PROP_STANDALONE ) != null;
				loggingDir = (String) config.getProperty( PROP_LOGGING_DIR );
				loggingLevel = (Level) config.getProperty( PROP_LOGGING_LEVEL );
			}
			if ( !ps.bStandalone )
			{
				try
				{
					Platform.startup( config );
				}
				catch ( BirtException e )
				{
					logger.log( e );
				}
			}
			ps.initFileLogger( loggingDir, loggingLevel );
		}
		return ps;
	}
	private void initFileLogger( String loggingDir, Level loggingLevel )
	{
		if ( loggingLevel != null && loggingLevel == Level.OFF )
		{