Создание огромного файла Excel / PDF в Struts 2 ошибка

Question

В проекте Struts 2 я пытаюсь экспортировать PDF и Excel. Для таких данных, как 15000, он работает нормально, но если данные превышают 50000, он выдает исключение.

 java.lang.IllegalArgumentException: Can not find a java.io.InputStream with the name [inputStream] in the invocation stack. Check the <param name="inputName"> tag specified for this action

Конфигурация Struts.xml.

<result name="success" type="stream">
    <param name="contentType">application/vnd.ms-excel</param>
    <param name="inputName">inputStream</param>
    <param name="contentDisposition">attachment;filename="ActivitiesList.xls"</param>
    <param name="bufferSize">4096</param>
</result>

Service.java

            public HSSFWorkbook exportInExcel(ActivitiesReportDTO activitiesReportDTO) throws Exception {
    CreateExcelHelper cEH = new CreateExcelHelper("Activities List");

            HSSFWorkbook workbook = null;
            workbook = new HSSFWorkbook();
            HSSFSheet sheet = workbook.createSheet("Activities List");

            HSSFCellStyle cellStyleHeader = cEH.getColHeaderStyle(workbook);
            HSSFCellStyle cellStyleCol = cEH.getColStyle(workbook);

            int headerRowCounter = 0;
            HSSFRow row = sheet.createRow(2);
            cEH.getExcelCellStr(row,0,cellStyleHeader,"Sr No");                     
            int i = 0;
            for(EmployeeActivityLogDTO dto : listOfActivities){        
                row = sheet.createRow((short)++rowIndex);

                int dataRowCounter = 0;
                cEH.getExcelCellNum(row,0,cellStyleCol,++i);
                cEH.getExcelCellStr(row,++dataRowCounter,cellStyleCol,dto.getNtLogin());                
            }
            return workbook;
    }

Action.java (это метод в strutsaction.java)

public String exportInExcel() {
        try {           
            HSSFWorkbook workbook = activitiesReportService.exportInExcel(activitiesReportDTO);
            ByteArrayOutputStream boas = new ByteArrayOutputStream();
            workbook.write(boas);
            setInputStream(new ByteArrayInputStream(boas.toByteArray()));
        } catch (Exception e) {
            logger.error("Exception Occured :", e);
        }
        return SUCCESS;
    }