[hibernate-issues] [Hibernate-JIRA] Commented: (HV-495) Many locks on AnnotatedElements

[Hardy Ferentschik (JIRA)]

    [ https://hibernate.onjira.com/browse/HV-495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=46113#comment-46113 ] 

Hardy Ferentschik commented on HV-495:
--------------------------------------

A more long term solution to avoid reflection in general would be to introduce Jandex as annotation repository and use it for annotation based meta data. Amongst other things the Jandex index can even be saved to disk in which case on following startups no reflection has to occur at all. Of course this comes at the cost of another dependency. 

> Many locks on AnnotatedElements
> -------------------------------
>
>                 Key: HV-495
>                 URL: https://hibernate.onjira.com/browse/HV-495
>             Project: Hibernate Validator
>          Issue Type: Patch
>          Components: validators
>    Affects Versions: 4.2.0.CR1
>         Environment: GNU/Linux, JVM 6.0, Hibernate Validator 4.2.0.CR1
>            Reporter: Loïc DIAS DA SILVA
>             Fix For: 4.3.0.CR1
>
>         Attachments: jmeter-graph.docx, patch-ldds.patch
>
>
> Hi all, we use Hibernate Validator 4.2.0-CR1 (previously Apache BVAL) for one of our API projects.
> All is working fine for our needs except one big issue recently discovered during JMeter tests.
> Several injectors make many requests from some Amazon cloud servers to our API and starting from a number of requests the response time begins to increase eavily, making a big jump from about 100ms in average to more than 5s.
> After investigating we have seen many locks in some AnnotatedElement methods (mainly getAnnotation).
> I've then made a little patch on hibernate in order to cache this kind of requests as i've not found any other cleaver/yet implemented way..
> Since this patch all is working very well for us..
> Regards.

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