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http://jira.magnolia.info/browse/MAGNOLIA-2029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Philipp Bracher resolved MAGNOLIA-2029.
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Resolution: Fixed
> If anonymous user is not found magnolia can corrupt the user repository
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>
> Key: MAGNOLIA-2029
> URL: http://jira.magnolia.info/browse/MAGNOLIA-2029
> Project: Magnolia
> Issue Type: Bug
> Components: core
> Affects Versions: 3.5.3
> Reporter: Fabrizio Giustina
> Assignee: Fabrizio Giustina
> Priority: Blocker
> Fix For: 3.5.4
>
>
> Ok, this is pretty difficult to explain since the principal cause is still
> unknown but I saw it several times...
> I will try to trace the root issue separately, but here I will discuss only a
> fix that can alleviate the problem.
> Happened only on a clustered instance with a jackrabbit bundle db persistence
> manager on ms sql server (since magnolia 3.1 milestones to 3.5.3):
> - on one of the nodes magnolia can't find the anonymous user at startup also
> if it should be there (this is the problem that still needs to be
> investigated)
> - ... so it creates a new Anonymous user with default permissions (none)
> - the new anonymous user gets propagated to othe instances
> - other calls still can't find such user, so more anonymous users are created
> - the result is that at the end there are hundreds of anonymous users in the
> repository (all of them called "anonymous")
> - all the cluster nodes gets locked up (public instances starts to show the
> magnolia login page!)
> the only way to restore it is to shut down all the instances, restart only
> one of the, log into magnolia as a superuser and delete manually all the
> additional "anonymous" users.
> I am debugging this problem, but I don't still have any clue on why the
> anonymous user couldn't be found. Looks like a jackrabbit bug but it's really
> strange.
> Anyway, since the scenario after the initial problem is so bad, I think we
> should at least avoid that magnolia could cause such damage, by NOT creating
> the anonymous user anymore if it can't find it. Note that this happened
> several times and that only the anonymous user looks to be affected.
>
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