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https://issues.apache.org/jira/browse/TAPESTRY-2561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12629206#action_12629206
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Howard M. Lewis Ship commented on TAPESTRY-2561:
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FYI: Ultimately, I think the problem here was the fact that javassist.ClassPool
needs to invoke setAccessible() in order to invoke defineClass(), a protected
ClassLoader method. That is, I believe, what ends up locking the class loader
(though it's hard to tell, at it may be the actual call to defineClass() that
does it).
In any case, introducing the extra URLClassLoader between the context class
loader and the component layer class loader is doing the trick.
> Rapidly refreshing a page, even the same page, can cause a deadlock related
> to class loading
> --------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2561
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2561
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.14
> Environment: Mac pro, OS Version: Mac OS X 10.5.4 (9E17)
> Java HotSpot(TM) Client VM (1.5.0_13-119 mixed mode,
> sharing)
> Reporter: Steven Woolley
> Assignee: Howard M. Lewis Ship
> Priority: Blocker
> Fix For: 5.0.15
>
> Attachments: full thread dump deadlock.txt
>
>
> It was triggered by (accidentally) double clicking a pagelink ;)
> Unfortunately, can't quite repeat it... at least not clicking with a mouse...
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