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https://issues.apache.org/jira/browse/JSPWIKI-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12619319#action_12619319
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Harry Metske commented on JSPWIKI-324:
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I was not able to recreate this problem on 2.7.0-alpha-7 (my personal wiki) nor
on v2.8.0-alpha-1 (sandbox.jspwiki.org).
They both use the VersioningFileProvider.
You can try it yourself on the sandbox if you want:
- create account A
- login with A
- create page A with ACL: [{ALLOW edit accountA}] and pagelink to page B
- logout
- create account B
- create page B
- rename page B
No NPE's, referring links are updated.
> ReferenceManager throws NullPointerException when renaming read-only page
> -------------------------------------------------------------------------
>
> Key: JSPWIKI-324
> URL: https://issues.apache.org/jira/browse/JSPWIKI-324
> Project: JSPWiki
> Issue Type: Bug
> Components: Core & storage
> Affects Versions: 2.6.2
> Environment: RHEL 5.1, Apache Tomcat 6.0.16, JSPWiki 2.6.2
> Reporter: Thomas Hinterndorfer
> Assignee: Harry Metske
> Priority: Minor
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> I am using custom Page and Attachment Providers, so this issue may not be
> recreatable in other environments.
> These providers store the contents in the CMS of the company, i am working
> for.
> I have 2 pages, created by different users, linking each other. If i change
> the ACL (in the CMS) for page A, so the other user may only read, but not
> change it, then rename page B with the user, who may only read page A, the
> referring link on page A is not updated, because the user doesn't have write
> permissions. But if i then rename page A, i get a NullPointerException from
> the ReferenceManager (the page name is updated correctly), it's only
> confusing for users to get an error, and other references to the page aren't
> updated too. If i restart JSPWiki after renaming page B, there's no error. So
> i guess, the ReferenceManager is trying to update the link, it fails due to
> the lack of permissions, and the ReferenceManager stores wrong information
> and tries to update non-existing references when renaming page A. This would
> explain why there's no error after restarting, because the references are
> rebuilt.
> Text from Error.jsp:
> Error Message
> An unknown exception java.lang.NullPointerException was caught by
> Error.jsp.
> Exception
> java.lang.NullPointerException
> Place where detected
> com.ecyrd.jspwiki.ReferenceManager.clearPageEntries(), line 885
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