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From "Lukasz Lenart (JIRA)" <>
Subject [jira] [Commented] (OGNL-224) Performance - Locking and performance problem with OgnlRuntime.findParameterTypes
Date Mon, 22 Oct 2012 06:06:12 GMT


Lukasz Lenart commented on OGNL-224:

I will merge it to OGNL git source and prepare a new version.
> Performance - Locking and performance problem with OgnlRuntime.findParameterTypes
> ---------------------------------------------------------------------------------
>                 Key: OGNL-224
>                 URL:
>             Project: Commons OGNL
>          Issue Type: Improvement
>          Components: Core Runtime
>    Affects Versions: 3.0
>            Reporter: Pelladi Gabor
>            Priority: Minor
>              Labels: patch, perfomance
>         Attachments: OGNL-224.patch,
> I am using struts2 and under heavy load (around 100 threads) many threads are in BLOCKED
state because of OgnlRuntime.findParameterTypes(). The actions we use have a generic superclass
> public class PersonalCaptureAction extends DataCaptureAction<PersonalDTO>
> OGNL handles this very bad, it enters
> synchronized (_genericMethodParameterTypesCache)
> all the time, at every property access of the Action. A possible workaround is to introduce
another layer of superclass that is not generic.
> I know that in current OGNL trunk (4.0-SNAPSHOT) caching has been rewritten, but Struts2
is using 3.0.5, and maybe it could be fixed as 3.0.6 in the git tree I found:
> I will attach a patch and a testcase.

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