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https://issues.apache.org/jira/browse/WW-3902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lukasz Lenart updated WW-3902:
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Fix Version/s: 2.3.6
> Performance - Locks in class loader
> -----------------------------------
>
> Key: WW-3902
> URL: https://issues.apache.org/jira/browse/WW-3902
> Project: Struts 2
> Issue Type: Improvement
> Components: Plugin - JSON
> Affects Versions: 2.3.5
> Reporter: Pelladi Gabor
> Priority: Minor
> Labels: patch, performance
> Fix For: 2.3.6
>
> Attachments: WW-3902.diff
>
>
> JSONWriter is causing locks in class loader, because it always invokes
> Introspector.getBeanInfo(). That in turn tries to load a class with
> "BeanInfo" suffix in Introspector.findExplicitBeanInfo(). Such class does not
> exists, but we try to load it over and over again for every JSON result.
> Class loading involves a lock in the application server, and this causes
> performance issue in heavily multithreaded applications.
> This could be solved by caching the BeanInfo for the classes, for which I
> have created a patch.
> The issue is also mentioned here:
> http://stackoverflow.com/questions/12728860/java-performance-issue-tomcat-webappclassloader-locked
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