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https://jira.jboss.org/jira/browse/RF-4471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12442310#action_12442310
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Denis Petrunin commented on RF-4471:
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I've encountered in the same issue on 3.2.2-SR1.
See org.ajax4jsf.resource.ResourceBuilderImpl for ImageIO.setUseCache(false)
(line 115). Due to this call there is a reference to WebappClassLoader in
static member of sun.awt.AppContext. As result webapp classes can't be garbage
collected in PermGen space. I can't continuously redelpoy my web application
due to PermGen failure (java.lang.OutOfMemoryError).
Here is an output of jhat utility (heap dump was done after webapp was
undeployed):
Static reference from sun.awt.AppContext.mainAppContext (from class
sun.awt.AppContext) :
--> sun.awt.appcont...@0x3a30ce0 (49 bytes) (field contextClassLoader:)
--> org.apache.catalina.loader.webappclassloa...@0x382ec00 (152 bytes)
As result I have a troubles with hot redeployment while development.
> Usage of ImageIO in ResourceBuilderImpl causes memory leak
> ----------------------------------------------------------
>
> Key: RF-4471
> URL: https://jira.jboss.org/jira/browse/RF-4471
> Project: RichFaces
> Issue Type: Bug
> Affects Versions: 3.1.6
> Environment: any
> Reporter: Philipp Schoepf
> Assignee: Nick Belaevski
> Fix For: Future
>
>
> It seems as we found a memleak in the ResourceBuilderImpl class. The call to
> ImageIO.setCache(false)
> causes sun.awt.AppContext to statically initialize itself (inside static
> initialization of IIORegistry). The problem is that AppContext seems to hold
> a static reference to the contextclassloader of the calling thread. When our
> application gets undeployed the reference to the applications classloader is
> still hold by AppContext causing that loaded classes cannot be garbage
> collected.
> I only checked richfaces 3.16 but if ResourceBuilderImpl still exists in 3.2
> stream I suppose that the problem exists there as well.
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