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From "Christian Marquez Grabia (JIRA)" <>
Subject [jira] [Commented] (COMPRESS-380) Support for ENHANCED_DEFLATED (Deflate64) in ZIP files
Date Thu, 09 Nov 2017 00:29:00 GMT


Christian Marquez Grabia commented on COMPRESS-380:

I have tried many other options to solve this issue but not able to... the only thing I could
use to replace it is the sevenzipjbinding project but it seems to have caused some JVM crashes
when running unit tests (randomly), so I'm a bit concerned about it... currently spawning
a separate process to execute the native code to avoid any major issues here...

Any update / suggestions on the topic would be greatly appreciated.

> Support for ENHANCED_DEFLATED (Deflate64) in ZIP files
> ------------------------------------------------------
>                 Key: COMPRESS-380
>                 URL:
>             Project: Commons Compress
>          Issue Type: New Feature
>            Reporter: Dawid Weiss
> Some of the (large) ZIP files we try to process currently will throw this:
> {code}
> UnsupportedZipFeatureException: unsupported feature method 'ENHANCED_DEFLATED' 
> {code}
> which is a bummer since JDK's implementation also doesn't support Deflate64. This seems
to be PKWare's extensions, although code to decrypt it exists in zlib (and is appropriately
licensed, I believe).

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