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https://issues.apache.org/jira/browse/COMPRESS-185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13241235#comment-13241235
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Stefan Bodewig commented on COMPRESS-185:
-----------------------------------------
Don't worry.
> BZip2CompressorInputStream truncates files compressed with pbzip2
> -----------------------------------------------------------------
>
> Key: COMPRESS-185
> URL: https://issues.apache.org/jira/browse/COMPRESS-185
> Project: Commons Compress
> Issue Type: Bug
> Components: Compressors
> Affects Versions: 1.3
> Reporter: Karsten Loesing
> Fix For: 1.4
>
>
> I'm using BZip2CompressorInputStream in Compress 1.3 to decompress a file
> that was created with pbzip2 1.1.6 (http://compression.ca/pbzip2/). The
> stream ends early after 900000 bytes, truncating the rest of the
> pbzip2-compressed file. Decompressing the file with bunzip2 or compressing
> the original file with bzip2 both fix the issue. I think both pbzip2 and
> Compress are to blame here: pbzip2 apparently does something non-standard
> when compressing files, and Compress should handle the non-standard format
> rather than pretending to be done decompressing. Another option is that I'm
> doing something wrong; in that case please let me know! :)
> Here's how the problem can be reproduced:
> 1. Generate a file that's 900000+ bytes large: dd if=/dev/zero of=1mbfile
> count=1 bs=1M
> 2. Compress with pbzip2: pbzip2 1mbfile
> 3. Decompress with Bunzip2 class below
> 4. Notice how the resulting 1mbfile is 900000 bytes large, not 1M.
> Now compare to using bunzip2/bzip2:
> - Do the steps above, but instead of 2, compress with bzip2: bzip2 1mbfile
> - Do the steps above, but instead of 3, decompress with bunzip2: bunzip2
> 1mbfile.bz2
> import java.io.*;
> import org.apache.commons.compress.compressors.bzip2.*;
> public class Bunzip2 {
> public static void main(String[] args) throws Exception {
> File inFile = new File(args[0]);
> File outFile = new File(args[0].substring(0, args[0].length() - 4));
> FileInputStream fis = new FileInputStream(inFile);
> BZip2CompressorInputStream bz2cis =
> new BZip2CompressorInputStream(fis);
> BufferedInputStream bis = new BufferedInputStream(bz2cis);
> BufferedOutputStream bos = new BufferedOutputStream(
> new FileOutputStream(outFile));
> int len;
> byte[] data = new byte[1024];
> while ((len = bis.read(data, 0, 1024)) >= 0) {
> bos.write(data, 0, len);
> }
> bos.close();
> bis.close();
> }
> }
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