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https://issues.apache.org/struts/browse/WW-3201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Musachy Barroso resolved WW-3201.
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Resolution: Won't Fix
we can't make changes in ognl
> thread contention on OGNL ClassCasheImpl
> ----------------------------------------
>
> Key: WW-3201
> URL: https://issues.apache.org/struts/browse/WW-3201
> Project: Struts 2
> Issue Type: Sub-task
> Reporter: Musachy Barroso
> Assignee: Musachy Barroso
> Fix For: Future
>
>
> OGNL has a custom map implementation(ognl.internal.ClassCacheImpl) where it
> keeps a cache from Class->Object. In OgnlRuntime, there are several caches
> that use this implementation and OgnlRuntime synchronizes on it often.
> Suggested solution: replace the internal implementation of a map in
> ClassCacheImpl by ConcurrentHashMap. Because these caches are mostly
> readonly, this will reduce thread contention.
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