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https://jira.codehaus.org/browse/SUREFIRE-864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=312419#comment-312419
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Luke Stevens commented on SUREFIRE-864:
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Wow, that means the JUnit plugin is doing the wrong thing by letting it work.
Never would have figured that out myself. Thanks for looking into it!
> NPE when unit test loads resources from JAR
> -------------------------------------------
>
> Key: SUREFIRE-864
> URL: https://jira.codehaus.org/browse/SUREFIRE-864
> Project: Maven Surefire
> Issue Type: Bug
> Affects Versions: 2.9, 2.10, 2.11, 2.12
> Environment: Windows 64-bit, Eclipse Maven plug-in
> Reporter: Luke Stevens
> Assignee: Kristian Rosenvold
> Attachments: TestSurefire.zip
>
>
> I have a unit test that reads resources from a JAR built by another project.
> This works totally fine when running JUnit within Eclipse. But when building
> under Maven, it hits an error:
> java.lang.NullPointerException
> at java.io.FilterInputStream.close(FilterInputStream.java:155)
> at
> sun.net.www.protocol.jar.JarURLConnection$JarURLInputStream.close(JarURLConnection.java:90)
> ...
> Suppressing this error (which occurs on close, after all) only leads to
> others.
> Some digging reveals that this is probably related to a longstanding
> classloader bug in the JVM:
> http://stackoverflow.com/questions/3216780/
> A very simple project is attached to demonstrate the problem.
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