[jira] [Updated] (WICKET-4572) DiskDataStore returns the wrong page when the page disk space is full

["Martin Grigorov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/WICKET-4572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martin Grigorov updated WICKET-4572:
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    Attachment: pagecache.zip

A quickstart that reproduces the problem:

1. Open the home page. There you can find two links ("Page A", "Page B")
2. Now you have to open "Page B" in a new tab, three times in a row
3. Switch to the Page B tab that you have opened first
4. Click on the "update" link on that page
5. You can now see that that an error occurred. 
                
> DiskDataStore returns the wrong page when the page disk space is full 
> ----------------------------------------------------------------------
>
>                 Key: WICKET-4572
>                 URL: https://issues.apache.org/jira/browse/WICKET-4572
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket
>    Affects Versions: 1.5.6
>            Reporter: Martin Grigorov
>            Assignee: Martin Grigorov
>            Priority: Critical
>         Attachments: pagecache.zip
>
>
> If the configured file size for the session data is overflowed (see org.apache.wicket.settings.IStoreSettings#setMaxSizePerSession(Bytes)) then Wicket may return wrong page data (bytes) for a expired page.
> The problem is in org.apache.wicket.pageStore.PageWindowManager#idToWindowIndex which may have several page ids (the keys) pointing to the same window index (values).

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