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https://issues.apache.org/jira/browse/COMPRESS-449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stefan Bodewig resolved COMPRESS-449.
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Resolution: Workaround
> IOUtils.skip throws an IOException sometimes
> --------------------------------------------
>
> Key: COMPRESS-449
> URL: https://issues.apache.org/jira/browse/COMPRESS-449
> Project: Commons Compress
> Issue Type: Bug
> Affects Versions: 1.6
> Reporter: Dennis New
> Priority: Major
> Fix For: 1.17
>
>
> commons-compress > 1.5 introduced some weird IOUtils.skip bug (it introduced
> that function in 1.6 in 2013 I think). It exists with all the versions of
> commons-compress that I tested after 1.5, including 1.6, 1.10. java -version
> says I'm using openjdk version "1.8.0_151" (IcedTea 3.6.0), and I'm using gnu
> tar 1.30.
> Basically, is.skip() and IOUtils.skip() are throwing an IOException somewhere
> somehow. Replacing those functions with is.read(bytearraybufferbla) "fixes"
> the bug for me.
> I can reproduce the bug by creating a tar file even with a single file in it.
> Oddly enough, this bug only appears if the file in the tar is greater than
> 7680 bytes!?. For every possible file size less than or equal to that, it
> works. For every file size greater than that, (I only tested up to 50,000
> bytes :p), it fails. For example:
> dd if=/dev/zero of=testfile2 bs=1 count=7681
> tar cf moo.tar testfile2
> Then with the following java test code:
> import java.io.IOException;
> import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
> import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
> import org.apache.commons.compress.archivers.ArchiveEntry;
> public class HelloWorld {
> public static void main(String[] args) {
> try {
> TarArchiveInputStream tis = new TarArchiveInputStream
> (System.in);
> ArchiveEntry entry;
> while ( (entry=tis.getNextEntry()) != null) {
> System.out.println(entry.getName());
> }
> } catch (IOException e) {
> for (StackTraceElement ste : e.getStackTrace()) {
> System.out.println(ste);
> }
> }
> }
> }
> Although this works (inputting using that "<" redirection),
> java -Xbootclasspath/a:commons-compress.jar HelloWorld < moo.tar
> This doesn't work (piping it out of a cat call),
> cat moo.tar | java -Xbootclasspath/a:commons-compress.jar HelloWorld
> testfile2
> java.io.FileInputStream.skip(Native Method)
> java.io.BufferedInputStream.skip(BufferedInputStream.java:377)
> org.apache.commons.compress.archivers.tar.TarArchiveInputStream.skip(TarArchiveInputStream.java:211)
> org.apache.commons.compress.utils.IOUtils.skip(IOUtils.java:103)
> org.apache.commons.compress.archivers.tar.TarArchiveInputStream.getNextTarEntry(TarArchiveInputStream.java:263)
> org.apache.commons.compress.archivers.tar.TarArchiveInputStream.getNextEntry(TarArchiveInputStream.java:562)
> HelloWorld.main(HelloWorld.java:11)
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