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https://issues.apache.org/jira/browse/BEANUTILS-59?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497255
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Niall Pemberton commented on BEANUTILS-59:
------------------------------------------

The declaredMethodCache was removed from MappedPropertyDescriptor for issue# 
BEANUTILS-6 (on 1st Sept 2005)  - see revision 265760[1]. BeanUtils already 
contained equivalent functionality in the getMatchingAccessibleMethod() method 
in MethodUtils - so this was used to replace the functionality in 
MappedPropertyDescriptor.

However MethodUtils also uses a static Map to cache "Method" instances (keyed 
by MethodDescriptor) - the difference is that the Map in this case is a 
WeakHashMap. Does this resolve this issue? If it doesn't then the MethodUtils 
static WeakHashMap be put inside a ContextClassLoaderLocal[2] instance - which 
would mean there would be a cache of methods (i.e. Map) for each ClassLoader in 
a WeakHashMap.

[1] http://svn.apache.org/viewvc?view=rev&revision=265760
[2] 
http://svn.apache.org/repos/asf/jakarta/commons/proper/beanutils/trunk/src/java/org/apache/commons/beanutils/ContextClassLoaderLocal.java



> [beanutils] Memory leak on webapp undeploy in WrapDynaClass
> -----------------------------------------------------------
>
>                 Key: BEANUTILS-59
>                 URL: https://issues.apache.org/jira/browse/BEANUTILS-59
>             Project: Commons BeanUtils
>          Issue Type: Bug
>          Components: DynaBean
>    Affects Versions: 1.6
>         Environment: Operating System: All
> Platform: All
>            Reporter: Simon Kitching
>             Fix For: 1.8.0
>
>         Attachments: WrapDynaClassClassKey.txt, WrapDynaClassClassKey.txt
>
>
> Class WrapDynaClass has a HashMap dynaClasses containing a mapping from Class 
> to
> WrapDynaClass. If this class were to be deployed via a shared webapp, then any
> reference in there to a class loaded via the webapp classloader will prevent 
> the
> webapp classloader from being garbage-collected when the webapp is undeployed.

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