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https://issues.apache.org/jira/browse/WICKET-4293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pepijn de Geus updated WICKET-4293:
-----------------------------------

    Attachment: patch.txt
                Wicket153-bug.zip

Quickstart to reproduce the bug. Must be ran on GlassFish to be able to see the 
problem.

The patch on Wicket 1.5-SNAPSHOT fixes the problem.
                
> UrlResourceStream closes incorrect InputStream causing stacktraces on 
> undeploy on GlassFish
> -------------------------------------------------------------------------------------------
>
>                 Key: WICKET-4293
>                 URL: https://issues.apache.org/jira/browse/WICKET-4293
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket
>    Affects Versions: 1.5.3
>         Environment: GlassFish v2.1.1 and GlassFish v.3.1
> java version "1.6.0_29"
> Java(TM) SE Runtime Environment (build 1.6.0_29-b11-402-11M3527)
> Java HotSpot(TM) 64-Bit Server VM (build 20.4-b02-402, mixed mode)
> Mac OS X 10.7.2
>            Reporter: Pepijn de Geus
>              Labels: core, ear, glassfish, resource
>         Attachments: Wicket153-bug.zip, patch.txt
>
>
> The UrlResourceStream, used by PackageResources, uses 
> URLConnection#getInputStream() to get file contents. This method is called in 
> UrlResourceStream#getInputStream(), but also when closing the resource in 
> UrlResourceStream#close(). At least on GlassFish v2 and v3, the second call 
> to URLConnection#getInputStream() returns a new stream, so the one created to 
> retrieve the file contents is never closed properly.
> This results in a warning of the container when the classes are 
> garbage-collected, for example on undeploy.
> The problem is not triggered in all situations. It can be reproduced by using 
> Wicket in a multi-module project consisting of an EAR, WAR and JAR. The JAR 
> must contain a resource (CSS, image, ...) and a Behavior. Inside the 
> Behavior, a static ResourceReference must be created for the resource file.
> When using this Behavior from inside the WAR project by loading a page the 
> resource is loaded properly. On undeploy however, the described problem will 
> show up.
> The problem does not exists in Wicket 1.4.x, because a reference to the 
> InputStream is stored. A quickstart and patch for 1.5 is available, will try 
> to attach it :)

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