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https://issues.apache.org/jira/browse/JSPWIKI-299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608168#action_12608168
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Harry Metske commented on JSPWIKI-299:
--------------------------------------

Nope, I still have to find out where to fiddle the cache when a page is 
renamed. (can take a while since I'll be on vacation for 3 weeks)

> NPE while deleting an attachment from a renamed page
> ----------------------------------------------------
>
>                 Key: JSPWIKI-299
>                 URL: https://issues.apache.org/jira/browse/JSPWIKI-299
>             Project: JSPWiki
>          Issue Type: Bug
>          Components: Core & storage
>    Affects Versions: 2.7.x
>         Environment: JSPWiki 2.7.0-svn-49
>            Reporter: Harry Metske
>            Priority: Minor
>             Fix For: 2.8
>
>         Attachments: JSPWIKI-299.patch
>
>
> If you try to delete an attachment from a page that has been renamed, you 
> will get the following NPE:
> Error Message
>     An unknown exception java.lang.NullPointerException was caught by 
> Error.jsp.
> Exception
>     java.lang.NullPointerException
> Place where detected
>     
> com.ecyrd.jspwiki.providers.CachingAttachmentProvider$CachedAttachmentCollector.cacheEntryRemoved(),
>  line 459
> patch is attached (an extra NPE check) 

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