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From "Janne Jalkanen (JIRA)" <>
Subject [jira] Updated: (JSPWIKI-324) ReferenceManager throws NullPointerException when renaming read-only page
Date Sun, 10 Aug 2008 10:31:44 GMT


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:
>             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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