https://bz.apache.org/bugzilla/show_bug.cgi?id=58499
--- Comment #3 from Mirek <m.han...@netpr.pl> --- Sorry - I was mistaken with root cause. My problem can be reproduced with such test try (OutputStream os = new NullOutputStream()) { SXSSFWorkbook workbook = new SXSSFWorkbook(); Sheet sheet = workbook.createSheet(); for (int i = 0; i < 900; i++) { Row r = sheet.createRow(i); Cell c = r.createCell(0); CellStyle cs = workbook.createCellStyle(); c.setCellStyle(cs); c.setCellValue("AAA"); } workbook.write(os); workbook.dispose(); } This code will throw zip bomb exception. Adding ZipSecureFile.setMinInflationRatio(0) eliminates this problem. You can close this issue. -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@poi.apache.org For additional commands, e-mail: dev-h...@poi.apache.org