Martin Grigorov created WICKET-4572:
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             Summary: 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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