Pelladi Gabor created WW-3902:
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Summary: 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
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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