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https://issues.apache.org/jira/browse/COMPRESS-124?focusedWorklogId=355131&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-355131
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ASF GitHub Bot logged work on COMPRESS-124:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 06/Dec/19 11:42
            Start Date: 06/Dec/19 11:42
    Worklog Time Spent: 10m 
      Work Description: tcurdt commented on issue #87: COMPRESS-124 : Add 
support for extracting sparse entries from tar archives
URL: https://github.com/apache/commons-compress/pull/87#issuecomment-562540937
 
 
   I didn't do a thorough code review but from the diffs it looks OKish. Still 
not sure about some of the new classes. Either way - thanks for all the work!
   
   It would probably be good to check this out and look at the final code as 
this is a big change.
   
   I am wondering if our test cases are enough of a safety net.
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 355131)
    Time Spent: 4h  (was: 3h 50m)

> Unable to extract a sparse entries from tar archives
> ----------------------------------------------------
>
>                 Key: COMPRESS-124
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-124
>             Project: Commons Compress
>          Issue Type: New Feature
>          Components: Archivers
>    Affects Versions: 1.1, 1.2
>         Environment: Platform independent. However, I'm currently using 
> Window 7 Enterprise.
>            Reporter: Patrick Dreyer
>            Priority: Major
>              Labels: tar
>             Fix For: 1.20
>
>         Attachments: gnuSparseFile.patch
>
>          Time Spent: 4h
>  Remaining Estimate: 0h
>
> Good news first: I already have the patch ready for that.
> I got several TAR files which I could not extract with any of the existing 
> Java implementations, but I could extract all those TAR files successfully 
> with GNU tar.
> It turned out that all the failing TAR files contained so called sparse 
> files. Investigating the source code of all existing Java TAR implementations 
> showed me that none of them even recognizes the existence of GNU sparse 
> entries.
> Actually, I don't need to process one of the contained sparse files and I'm 
> happy if I'm at least able to correctly untar all the non-sparsed files. 
> Thus, it would be sufficient recognizing sparse files without the need to 
> correctly un-sparse them while extracting. As long as all non-sparsed files 
> get extracted correctly, I'm fine.
> The TAR files in question have all been VMware Diagnostic File bundles.
> See 
> http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=653
>  to know how to get them.



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