ReferenceManager throws NullPointerException when renaming read-only page
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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
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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