[jira] Updated: (JSPWIKI-324) ReferenceManager throws NullPointerException when renaming read-only page

["Janne Jalkanen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JSPWIKI-324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Janne Jalkanen updated JSPWIKI-324:
-----------------------------------

    Remaining Estimate:     (was: 4h)
     Original Estimate:     (was: 4h)

> 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
>
> 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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