Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-7015881

Cannot retrieve data about files within a jar-archive.

    XMLWordPrintable

Details

    • Bug
    • Resolution: Won't Fix
    • P4
    • None
    • 6u23
    • core-libs

    Description

      FULL PRODUCT VERSION :
      java version "1.6.0_21"
      Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
      Java HotSpot(TM) Client VM (build 17.0-b16, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Windows XP SP3, Windows 7

      A DESCRIPTION OF THE PROBLEM :
      java.util.zip.ZipInputStream generates incomplete entries: ZipEntry.getCompressedSize() and ZipEntry.getCrc() data is missing.
      At the same time java.util.zip.ZipFile processes the same archive fine.

      The jar-archive is created in 3.7 M4 with Oracle 1.6 JRE

      The reference SPR in Eclipse bug tracking system:
        https://bugs.eclipse.org/bugs/show_bug.cgi?id=333073



      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      1) Package a simple jar-file via Eclipse 3.6.2 or 3.7.0
      The source code can be downloaded from http://www.devdaily.com/java/jwarehouse/eclipse/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackagerfat/JarWriter4.java.shtml and used in a separate test.
      Contact me if you would like to have the existing file for testing.

      2) Create an application for reading the jar-files using the code in the Source code section.

      3) Run the application: CRC and Size are missing



      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      ENTRY 1 : META-INF/MANIFEST.MF : E80AFD6E : 65
      ENTRY 2 : ListZipFiles.class : 4CC7B653 : 1164
      ACTUAL -
      Opening zip file ListZipFiles.jar
      ENTRY 1 : META-INF/MANIFEST.MF : FFFFFFFFFFFFFFFF : -1
      ENTRY 2 : ListZipFiles.class : FFFFFFFFFFFFFFFF : -1

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      The code below doesn’t retrieve crc and size:
      FileInputStream fin = new FileInputStream(zipFileName);
      ZipInputStream zin = new ZipInputStream(fin);
      ZipEntry z = zin.getNextEntry();
      while (z != null) {
      ...
      System.out.println("ENTRY " + counter + " : " + zipEntryName + " : " + Long.toHexString(z.getCrc()).toUpperCase()+ " : " + z.getCompressedSize());

          z = zin.getNextEntry();
      }


      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      This code works fine:
      ZipFile zipFile = new ZipFile(zipFileName);
      for ( Enumeration<? extends ZipEntry> entries = zipFile.entries(); entries.hasMoreElements(); )
      {
          ZipEntry z = entries.nextElement();
          System.out.println( Long.toHexString(z.getCrc()).toUpperCase()+ " : " + z.getCompressedSize());
       }

      Attachments

        Issue Links

          Activity

            People

              eirbjo Eirik Bjørsnøs
              webbuggrp Webbug Group
              Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:
                Imported:
                Indexed: