Created attachment 39458 [details]
Crash sample

Recently we discovered a bug in poi (5.2.3).
Due to the lack of contextual knowledge in the poi library, we cannot thoroughly fix some bugs hence we look forward to any proposed plan from the developers in fixing these bugs.

# Crash Stack

Exception in thread "main" java.lang.NullPointerException
        at org.apache.poi.openxml4j.opc.PackagePartName.throwExceptionIfEmptyURI(PackagePartName.java:204)
        at org.apache.poi.openxml4j.opc.PackagePartName.throwExceptionIfInvalidPartUri(PackagePartName.java:173)
        at org.apache.poi.openxml4j.opc.PackagePartName.<init>(PackagePartName.java:82)
        at org.apache.poi.openxml4j.opc.PackagingURIHelper.createPartName(PackagingURIHelper.java:481)
        at org.apache.poi.openxml4j.opc.internal.ContentTypeManager.parseContentTypesFile(ContentTypeManager.java:411)
        at org.apache.poi.openxml4j.opc.internal.ContentTypeManager.<init>(ContentTypeManager.java:102)
        at org.apache.poi.openxml4j.opc.internal.ZipContentTypeManager.<init>(ZipContentTypeManager.java:53)
        at org.apache.poi.openxml4j.opc.ZipPackage.getPartsImpl(ZipPackage.java:282)
        at org.apache.poi.openxml4j.opc.OPCPackage.getParts(OPCPackage.java:749)
        at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:322)
        at org.apache.poi.ooxml.util.PackageHelper.open(PackageHelper.java:59)
        at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:290)
        at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:286)
        at com.test.Entry.main(Entry.java:32)


# Test Program

package com.test;
import java.io.File;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class Entry {
        public static void main (String args[]) throws IOException {
                assert args.length == 1;
                System.out.println("Testing Harness with args[0]: " + args[0]);
                try {
                        FileInputStream fis = new FileInputStream(args[0]);
                        Workbook workbook = null;
                        workbook = new XSSFWorkbook(fis);
                        int numberOfSheets = workbook.getNumberOfSheets();
                        for(int i=0; i < numberOfSheets; i++){
                                Sheet sheet = workbook.getSheetAt(i);
                                Iterator<Row> rowIterator = sheet.iterator();
                                while (rowIterator.hasNext())
                        {
                                        String name = "";
                                        String shortCode = "";
                                        Row row = rowIterator.next();
                                        Iterator<Cell> cellIterator = row.cellIterator();
                            while (cellIterator.hasNext())
                            {
                                Cell cell = cellIterator.next();
                                if (cell.getCellType() == CellType.STRING){
                                name = cell.getStringCellValue().trim();
                                System.out.println("Random data::"+ name);
                                } else if (cell.getCellType() == CellType.NUMERIC){
                                System.out.println("Random data::"+cell.getNumericCellValue());
                                }
                            }
                        } 
                        fis.close();
                        }
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }
}