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https://jira.jboss.org/jira/browse/RF-4471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12464710#action_12464710
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Alexander Schwartz commented on RF-4471:
----------------------------------------
This code sample keeps away the Java2D Disposer and the AWT Windows thread.
They only appear when you have i.e. rendered images in richfaces tabs. But
beware: these images are cached, so you will get the threads only when you
force a reload.
@Create
public void startup() {
Thread thread = Thread.currentThread();
ClassLoader initialTCCL = thread.getContextClassLoader();
try {
ClassLoader systemCL = ClassLoader.getSystemClassLoader();
thread.setContextClassLoader(systemCL);
this.getClass().getClassLoader().loadClass(
"org.ajax4jsf.resource.ResourceBuilderImpl").newInstance();
this.getClass().getClassLoader().loadClass("sun.java2d.Disposer")
.newInstance();
// start AWT Windows thread
Toolkit.getDefaultToolkit().getSystemEventQueue();
} catch (...) {
...
}
}
> 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: 3.3.1
>
>
> 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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