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  1. Commons Compress
  2. COMPRESS-505

Multiple Reads of One SevenZArchiveEntry Fails

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 1.20
    • Fix Version/s: 1.21
    • Component/s: None
    • Labels:
      None

      Description

      I've run into a bug which occurs when attempting to read the same SevenZArchiveEntry stream multiple times. The following code illustrates the problem.

      File archive = new File("CC0 Images.7z");
      char[] password = "password".toCharArray();
      try (SevenZFile f = new SevenZFile(archive, password))
      {
        SevenZArchiveEntry entry = StreamSupport.stream(f.getEntries().spliterator(), false)
          .filter(e -> "alberta-amazing-attraction-banff-417074.jpg".equals(e.getName()))
          .findFirst().orElseGet(null);
        assert entry != null;
        for (int i = 0; i < 100; i++)
        {
          InputStream is = f.getInputStream(entry);
          BufferedImage img = ImageIO.read(is);
          assert img != null;
          System.out.println("Succeeded " + (i + 1) + " times");
        }
      }

      Below is the output I receive on version 1.20

      Succeeded 1 times
      Succeeded 2 times
      Exception in thread "main" java.io.IOException: Checksum verification failed
          at org.apache.commons.compress.utils.ChecksumVerifyingInputStream.read(ChecksumVerifyingInputStream.java:61)
          at org.apache.commons.compress.utils.ChecksumVerifyingInputStream.skip(ChecksumVerifyingInputStream.java:102)
          at org.apache.commons.compress.utils.IOUtils.skip(IOUtils.java:113)
          at org.apache.commons.compress.archivers.sevenz.SevenZFile.getCurrentStream(SevenZFile.java:1318)
          at org.apache.commons.compress.archivers.sevenz.SevenZFile.getInputStream(SevenZFile.java:1354)
          at org.abitoff.dmav.Test.main(Test.java:11)
      

       

       

        Attachments

        1. CC0 Images.7z
          29.39 MB
          Steven Fontaine

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              • Assignee:
                peterlee Peter Lee
                Reporter:
                acid1103 Steven Fontaine
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