Bug 132630 Additional markers can not support interactivity
Additional markers can not support interactivity Steps: 1.Create a line chart 2.Set Y series marker to additional marker such as star or ellipse 3.Add a interactivity such as showTooltip to Y series 4.Preview in web viewer Actual results: 1.Additional markers can not support interactivity Expected Results: 1.Additional markers can nsupport interactivity
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGRendererImpl.java
ChartException.RENDERING,
					"SVGRendererImpl.exception.UnableToWriteChartImage", 
					new Object[]{
						oOutputIdentifier
					},
					null );
		}
		
		cacheHotspots.clear();
		labelPrimitives.clear();		
		componentPrimitives.clear();
		scripts.clear();
	}
	/**
	 * Writes the XML document to an output stream
	 * 
	 * @param svgDocument
	 * @param outputStream
	 * @throws Exception
	 */
	private void writeDocumentToOutputStream( Document svgDocument,
			OutputStream outputStream ) throws Exception
	{
		if ( svgDocument != null && outputStream != null )
		{
			OutputStreamWriter writer = null;
			writer = new OutputStreamWriter( outputStream, "UTF-8" ); 
			DOMSource source = new DOMSource( svgDocument );
			StreamResult result = new StreamResult( writer );
			TransformerFactory transFactory = TransformerFactory.newInstance( );