Page Lock on Browser Back Button after Page Expiry
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                 Key: WICKET-4009
                 URL: https://issues.apache.org/jira/browse/WICKET-4009
             Project: Wicket
          Issue Type: Bug
          Components: wicket
    Affects Versions: 1.5-RC7
         Environment: Wicket version: 1.5-RC7
java version "1.6.0_25"
Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
Java HotSpot(TM) Client VM (build 20.0-b11, mixed mode, sharing)

            Reporter: bernard


In the attached quickstart, after page expiry and browser back navigation, a 
server error occurs such as:

"failed to acquire lock to page 0, attempted for 1 minutes out of allowed 1 
minute"
This appears to be related to request logging, but I have seen other strange 
errors without request logging such as

org.apache.wicket.request.handler.ComponentNotFoundException: Could not find 
component 'form' on page 'class web.page.ExpiredPage

also with browser history back navigation.

I have seen none of these errors in Wicket 1.4. I guess the reason for not 
having seen this before it that http cache headers are different in 1.5.


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