UTFDataFormatException

String pathJasper = getServletContext().getRealPath("/relatorio/contrato") + "/";
JRDataSource jrDataSourse = new JRBeanArrayDataSource(array.toArray());
JasperPrint impressao = JasperFillManager.fillReport(pathJasper + "ContratoBid.jasper", parametros, jrDataSourse);

byte[] bytes = JasperExportManager.exportReportToPdf(impressao);
response.setContentType("application/pdf");
response.setContentLength(bytes.length);
ServletOutputStream ouputStream = response.getOutputStream();
ouputStream.write(bytes, 0, bytes.length);
ouputStream.flush();
ouputStream.close();

JasperPrint impressao = JasperFillManager.fillReport(pathJasper + "ContratoBid.jasper", parametros, jrDataSourse);