Name: boT120536 Date: 02/26/2001


Development, JDK: "java version JDK.1.6_Borland"
Runtime, JRE: 1.1.6_008 (downloaded from your site - SUN )
   the problem exist on version 1.2 and 1.3 too.

The problems are:
- it is impossible to unzip a "zip" file that contains a file with a real
  size over 2Gb
- it is impossible to continue with the next "zip" entry if there is a
  problem with the current entry.
- note: I know that it is impossible to do a zip file over 4Gb (but it
  is possible to compress more than 4Gb of data if the result zip file
  has a size less than 4Gb...). It is the norm for eip... But I'm not
  sure this norm says that it is impossible to compress a file between
  2Gb and 4Gb...

The test is:
1) - 6Gb of free space on your disk is needed
   - 3Gb of used space on your disk is needed
   
2) Do a big zip file "big.zip" with 3 files a.dat, b.dat and c.dat :
   - a.dat and c.dat must have a small size (less than 1Mb; 1Kb is fine)
   - b.dat must have a big size (between 2Gb and 4Gb; 2.5Gb is fine. Note:
     1Gb = 1024Mb = 1,048,576Kb = 1073741824 bytes)
   - the name of the 3 files are important (there must be a file before
     and after the big file b.dat in the zip file).
   - for zipping operation, I have download the last version of the
     shareware tools "Winzip" (another zip tools can be used if it is
     compatible with your zip package - I have not try to zip the 3
     files with the zip package in "java.utils" - I'm not sure it would
     work...). Also, I have used this tools to create the b.dat (all my disk
     with no compression).

3) Unzip "big.zip" with the zip package in "java utils".

The results are :
- a.dat is correctly unzipped (if it is not a.dat then it is c.dat; it
  depends on how the file are stored in the "zip" file; so, it depends
  on the tools used for zipping)
- b.dat is not unzipped (a ZipException "invalid entry size" is thrown)
- c.dat can not be unzipped since there was a problem with the previous
  entry b.dat (if it is not c.dat then it is a.dat; ...)
(Review ID: 116880)
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Name: boT120536 Date: 04/22/2001


C:\data\JavaInvestigations\zip>c:\jbuilder3\java\bin\java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Server VM (build 2.0fcs-E, mixed mode)


I can't seem to write large zip files.

The code below _should_ generate a zip file
with 100,000 entries.
=============================================
import java.util.zip.*;
import java.io.*;


public class ZipTest
{
    private ZipOutputStream zip;

    public static void main (String[] args) throws Exception
    {
        ZipTest t = new ZipTest ();
        t.doIt();
    }

    public void doIt () throws Exception
    {
        zip = new ZipOutputStream (new FileOutputStream ("D:\\temp\\temp.zip"));
        zip.setMethod(ZipOutputStream.STORED);

        for (int i = 0; i < 100000; ++i)
        {
            byte[] data = new byte[1000];

            String entryName = "Fred" + i;

            CRC32 crc32 = new CRC32();
            crc32.update(data, 0, data.length);

            ZipEntry zipentry = new ZipEntry (entryName);
            zipentry.setSize(data.length);
            zipentry.setMethod(ZipEntry.STORED);
    // zipentry.setTime();
            zipentry.setCrc(crc32.getValue());
            zip.putNextEntry (zipentry);
            zip.write (data, 0, data.length);
            zip.closeEntry();
        }

        zip.close();
    }
}
========================================================

When I compile it, it runs to completion with no reported
errors. It generates a file that is _about_ the correct
size (106 MB). But, the file only reports 34464 entries
when opened. The last 63000+ entries are not accessible.

This is also a problem with JDK1.2.2
(Review ID: 121141)
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