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From "Carsten Ziegeler (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SLING-3524) ResourceResolver.clone(null) should not share the same JCR session
Date Wed, 02 May 2018 10:08:00 GMT

     [ https://issues.apache.org/jira/browse/SLING-3524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Carsten Ziegeler updated SLING-3524:
------------------------------------
    Component/s: API

> ResourceResolver.clone(null) should not share the same JCR session
> ------------------------------------------------------------------
>
>                 Key: SLING-3524
>                 URL: https://issues.apache.org/jira/browse/SLING-3524
>             Project: Sling
>          Issue Type: Improvement
>          Components: API, JCR, ResourceResolver
>    Affects Versions: Resource Resolver 1.0.6
>            Reporter: Alexander Klimetschek
>            Priority: Major
>             Fix For: API 2.18.2, JCR Resource 3.0.10, Resource Resolver 1.6.2
>
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> {{ResourceResolver.clone()}} will reuse the same JCR session in case it was created by
passing an existing session using {{JcrResourceConstants.AUTHENTICATION_INFO_SESSION}}. If
you need a clone of the resource resolver to pass into a new, separate thread, and use {{ResourceResolver.clone(null)}},
you will actually share the session, but this is not obvious. The problem is that a JCR session
cannot be shared across threads.
> The javadocs of clone() say "the same credential data is used as was used to create this
instance".
> There are a few problems with this:
> - seeing the session object itself as "credential data" is unintuitive
> - in my code, I have no idea what the original credential data was, so I don't know what
kind of credential data it was to make the right decision
> - since sharing a JCR session is to be avoided at all times, the resource resolver should
prevent one from this
> A solution would be if a plain {{ResourceResolver.clone(null)}} would return a session
that impersonated itself, abstracting this from the resource resolver user. Additionally,
it might be worth looking that clone always returns a new session, unless specifically stated.



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