https://bz.apache.org/bugzilla/show_bug.cgi?id=68524

            Bug ID: 68524
           Summary: Writing XLSX fails silently in POI 5.2.5
           Product: POI
           Version: unspecified
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: XSSF
          Assignee: dev@poi.apache.org
          Reporter: michael.hre...@baral-geohaus.de
  Target Milestone: ---

I've noticed that a certain problem appeared with version 5.2.5, while versions
5.2.3 and 5.2.4 work properly.

When I create an XSSFWorkbook like this:

org.apache.poi.ss.usermodel.Workbook workbook = new
org.apache.poi.xssf.usermodel.XSSFWorkbook();

then fill it will the createSheet Method and so on, and later use the write
Method to write to a simple FileOutputStream, like this:

java.io.OutputStream stream = new java.io.FileOutputStream(new
java.io.File(filename));
workbook.write(stream);

the writing fails. There is a .xlsx file, but it is corrupt, so that I cannot
open it, with 0 kb being displayed as its apparent size.

I do not get any exception, the write operation just fails silently.

The code in which this operation fails is written in Groovy (currently 2.5). It
worked for a long time, and an update to POI 5.2.5 causes the problem, while a
downgrade to 5.2.4 fixes it.

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