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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (JCR-2672) Cache also failed principal lookups
Date Wed, 04 Aug 2010 15:17:21 GMT

     [ https://issues.apache.org/jira/browse/JCR-2672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jukka Zitting updated JCR-2672:
-------------------------------

    Fix Version/s: 2.1.1

> Cache also failed principal lookups
> -----------------------------------
>
>                 Key: JCR-2672
>                 URL: https://issues.apache.org/jira/browse/JCR-2672
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core, security
>    Affects Versions: 2.0.0, 2.1.0
>            Reporter: Jukka Zitting
>            Assignee: angela
>            Priority: Minor
>             Fix For: 2.1.1, 2.2.0
>
>         Attachments: JCR-2672.patch
>
>
> The principal cache in Jackrabbit normally does a good job in ensuring good performance
in critical areas like ACL evaulation. However, the cache only includes successful principal
lookups, so an ACE that references a missing (or mistyped) principal can cause notable performance
issues as a new principal lookup is needed whenever the node covered by such an ACL is accessed.
> To solve that problem I propose that we extend the principal cache to also cover negative
principal lookups.

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