Problem

When trying to modify an existing Restriction, under Tools > Restrictions, the following error is thrown:

2013-08-06 11:44:12,876 WARN [http-8090-2] [confluence.pages.actions.GetPagePermissionsAction] execute User with name 'RemovedUser' not found, but page permissions still exist on: page: Test Page (106702962)
 -- space: 44269570 | url: /pages/getpagepermissions.action | page: 106702962 | userName: admin | referer: http://192.168.10.101:8090/pages/viewpage.action?pageId=106702962 | action: getpagepermissions

Cause

There is a user entry in CONTENT PERM table that does not exist on the confluence user base. That will cause the above stack trace to appear.

Diagnosis:

To find those users that belong to restrictions that are no longer in Confluence Users run below one of the below queries:

-- From Confluence 5.2.3 to latest
SELECT * FROM CONTENT_PERM cp inner join CONTENT_PERM_SET cps on cp.CPS_ID=cps.ID
WHERE USERNAME NOT IN (SELECT user_key FROM user_mapping);

-- Prior Confluence 5.2.3
SELECT * FROM CONTENT_PERM cp inner join CONTENT_PERM_SET cps on cp.CPS_ID=cps.ID 
WHERE USERNAME NOT IN (SELECT user_name FROM cwd_user);

Resolution

1. Shutdown Confluence

2. Go to your Database and Run the following queries:

   -- From Confluence 5.2.3 to latest
   delete from CONTENT_PERM where USERNAME NOT IN (SELECT user_key FROM user_mapping);
   delete from CONTENT_PERM_SET where ID NOT IN (select CPS_ID from CONTENT_PERM);
   
   -- Prior Confluence 5.2.3
   delete from CONTENT_PERM where USERNAME NOT IN (SELECT user_name FROM cwd_user);
   delete from CONTENT_PERM_SET where ID NOT IN (select CPS_ID from CONTENT_PERM);

3. Restart Confluence

4. Check if the error messages are gone.