Craig Russell commented on OPENJPA-148:

Just thinking a bit outside the box here. Is it possibly a bug that the classes 
directory is being presented as a file? 

And perhaps defensively OpenJPA might check to see if the file is actually a 
directory and then just ignore it. i.e. if (file.isDirectory()) continue;

But I'd like to see a bit more investigation into whether the behavior of the 
container is correct. It does seem odd that the container is expecting the 
provider to remove duplicate items from the deployment artifact.

> Parsing exception while using an "exploded" archive
> ---------------------------------------------------
>                 Key: OPENJPA-148
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-148
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jpa
>         Environment: Sun JDK 5.0 / EasyBeans / OpenJPA snapshot 0.9.7
>            Reporter: Florent BENOIT
>            Priority: Minor
>             Fix For: 0.9.8
>         Attachments: debug_traces_directorymode.txt, 
> debug_traces_filemode_working.txt, OPENJPA-148.patch, stacktrace-error.txt, 
> steps.txt
> This happens when using OpenJPA as persistence provider for the EasyBeans 
> ObjectWeb container.
> The error is happening with "exploded" archive.
> Exploded means that there is a directory, named "entitybean.jar" with a 
> folder META-INF which contains a file named persistence.xml, and other 
> directories/files for the classes.
> It seems that when using this mode, OpenJPA is trying to parse the directory 
> inputstream (which is failing).
> This exception is not occuring if a jar file is used instead of the 
> "exploded" mode, but the exploded mode is the default mode for EasyBeans.
> Note also that this exception don't occur by using Hibernate Entity Manager 
> or Oracle TopLink Essentials as persistence provider.
> I will attach to this issue a stack trace (with the exploded directory) which 
> fails and at the end with a jar file (which work)
> And 4 steps used to reproduce this problem

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