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https://jira.codehaus.org/browse/MNG-5589?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason van Zyl updated MNG-5589:
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Fix Version/s: 3.2.2
> Investigate how plugin classloaders are shutdown
> ------------------------------------------------
>
> Key: MNG-5589
> URL: https://jira.codehaus.org/browse/MNG-5589
> Project: Maven 2 & 3
> Issue Type: Improvement
> Affects Versions: 3.2.1
> Reporter: Jason van Zyl
> Fix For: 3.2.2
>
>
> http://www.mail-archive.com/dev@maven.apache.org/msg99645.html
> Stuart's analysis of the above thread:
> I suspect this is related to the change in Classworlds 2.4.1+ to use the
> new ClassLoader.close() method available in Java7 to forcibly close plugin
> ClassLoaders when the plugin/container realm is disposed. This happens
> after the Maven build is finished, but before JVM shutdown hooks run.
> Any plugin that registers a JVM shutdown hook which tries to load
> classes/resources from the original plugin realm will throw a NCDFE -
> you'll probably see similar issues if a plugin forks threads that are still
> running after the plugin/container realm has been disposed and subsequently
> try to load classes.
> ( note that the same error will likely occur with Maven 3.1.1 since it uses
> the same version of Classworlds )
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