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https://issues.apache.org/jira/browse/GROOVY-7733?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Wagenleitner resolved GROOVY-7733.
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    Resolution: Duplicate

> Can't unloaded Groovy classes - PermGen Erros
> ---------------------------------------------
>
>                 Key: GROOVY-7733
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7733
>             Project: Groovy
>          Issue Type: Bug
>          Components: groovy-jdk
>    Affects Versions: 1.0
>         Environment: linux,windows
>            Reporter: Itay Hudedi
>            Priority: Critical
>
> I have a legacy system that is extensively using Groovy version 1.0 and 
> currently I can not update Groovy to an updated version. From time to time 
> I'm getting a PermGen error due to the fact that all the Groovy 
> classes/scripts are kept in memory even if no one is using them any more.
> I'm trying to figure out what is the correct way to unload those classes 
> after I've finished using them.
> I'm using the following code to create the Script object:
>     GroovyShell shell=new GroovyShell();
>     Script script = shell.parse("ANY_TEXT");
>     .....
> And I'm trying the following code to unload the generated class:
>     MetaClassRegistry metaClassRegistry = MetaClassRegistry.getIntance(0);
>     metaClassRegistry.removeMetaClass(script.getMetaClass().getClass());
>     metaClassRegistry.removeMetaClass(script.getClass());
>     metaClassRegistry.removeMetaClass(script.getBinding().getClass());
>     script.setBinding(null);
>     script.setMetaClass(null);
>     script = null;
> Unfortunately, this doesn't seems to work because I keep on getting a PermGen 
> error. How can I unloaded groovy classes and keep the PermGen size reasonable?



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