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https://issues.apache.org/jira/browse/WICKET-3846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13057761#comment-13057761
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Peter Ertl commented on WICKET-3846:
------------------------------------

Should be working + fixed, leaving this ticket open for a while. Your feedback 
on tests is welcome!

> in environments without reliable timestamps (e.g. some clusters) resource 
> caching is useless
> --------------------------------------------------------------------------------------------
>
>                 Key: WICKET-3846
>                 URL: https://issues.apache.org/jira/browse/WICKET-3846
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket-core
>    Affects Versions: 1.5-RC5.1
>            Reporter: Peter Ertl
>            Assignee: Peter Ertl
>             Fix For: 1.5-RC6
>
>         Attachments: cache.patch
>
>
> As mentioned already in the wicket userlist *iirc* wicket's default resource 
> caching strategy using resource file timestamps will not work in some cluster 
> environments. Cluster deployers seem to be quite dumb and not preserve the 
> 'lastModified' file attribute. So depending on the server instance the 
> resource is delivered from it will contain multiple timestamps for the same 
> resource. Apparently timestamps seem to be unsuitable for the purpose of 
> caching in that environment.

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