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From: "Dmitry Katsubo (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (COMPRESS-189) ZipArchiveInputStream may read 0
 bytes when reading from a nested Zip file
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    [ https://issues.apache.org/jira/browse/COMPRESS-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498834#comment-13498834 ] 

Dmitry Katsubo commented on COMPRESS-189:
-----------------------------------------

I confirm the problem. I agree that {{java.util.zip.Inflater}} is not used according to JavaDocs and that causes the problem in some cases.
                
> ZipArchiveInputStream may read 0 bytes when reading from a nested Zip file
> --------------------------------------------------------------------------
>
>                 Key: COMPRESS-189
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-189
>             Project: Commons Compress
>          Issue Type: Bug
>          Components: Archivers
>    Affects Versions: 1.4.1
>         Environment: JDK 1.6 64-bit, Windows 7
>            Reporter: Daniel Lowe
>            Priority: Blocker
>
> When the following code is run an error "Underlying input stream returned zero bytes" is produced. If the commented line is uncommented it can be seen that the ZipArchiveInputStream returned 0 bytes. This only happens the first time read is called, subsequent calls work as expected i.e. the following code actually works correctly with that line uncommented!
> The zip file used to produce this behavious is available at http://wwmm.ch.cam.ac.uk/~dl387/test.ZIP
> If this is not the correct way of processing a zip file of zip files please let me know. Also I believe whilst ZipFile can iterate over entries fast due to being able to look at the master table whilst ZipArchiveInputStream cannot. Is there anyway of instantiating a ZipFile from a zip file inside another zip file without first extracting the nested zip file?
>     ZipFile zipFile = new ZipFile("C:/test.ZIP");
>     for (Enumeration<ZipArchiveEntry> iterator = zipFile.getEntries(); iterator.hasMoreElements(); ) {
>       ZipArchiveEntry entry = iterator.nextElement();
>       InputStream is = new BufferedInputStream(zipFile.getInputStream(entry));
>       ZipArchiveInputStream zipInput = new ZipArchiveInputStream(is);
>       ZipArchiveEntry innerEntry;
>       while ((innerEntry = zipInput.getNextZipEntry()) != null){
>         if (innerEntry.getName().endsWith("XML")){
>           //zipInput.read();
>           System.out.println(IOUtils.toString(zipInput));
>         }
>       }
>     }

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