alguém sabe pq meu relatorio abre assim?

public void generateReport()throws ClassNotFoundException, IOException, JRException {
		
		FacesContext context = FacesContext.getCurrentInstance();
		
		HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
		
		InputStream reportStream = context.getExternalContext().getResourceAsStream("/jasper/recibo.jasper");
		
		ServletOutputStream servletOutputStream = response.getOutputStream();
		
		Hashtable<String, Object> params = new Hashtable<String, Object>();
		
		Pessoa pessoa = (Pessoa) pojo;
		
		try {
			
			ImageIcon imgLogo = new ImageIcon(getClass().getResource("/br/com/ambiente/modulo/recibo/img/spot_logo.JPG")); 
			params.put("logo",  imgLogo.getImage());
			
			pessoa  = pessoaFacade.findByIdPessoa(pessoa.getCodPessoa());
			
			List<Pessoa> listPessoa = new ArrayList<Pessoa>();
			listPessoa.add(pessoa);
			
			JRBeanCollectionDataSource novo = new JRBeanCollectionDataSource(listPessoa);
			
			response.setContentType("application/pdf"); 
	
			JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream, params, novo);
			
		} catch (PersistenceException e) {
			e.printStackTrace();
		}
		
		context.responseComplete();
		
		servletOutputStream.flush();
		
		servletOutputStream.close();
				
	}