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From "Carsten Ziegeler (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FELIX-4538) [DS] problem with stale references with "triangle" of static references
Date Thu, 06 Aug 2015 12:21:06 GMT

     [ https://issues.apache.org/jira/browse/FELIX-4538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Carsten Ziegeler updated FELIX-4538:
------------------------------------
    Fix Version/s:     (was: scr-2.0.0)
                   scr-2.0.2

> [DS] problem with stale references with "triangle" of static references
> -----------------------------------------------------------------------
>
>                 Key: FELIX-4538
>                 URL: https://issues.apache.org/jira/browse/FELIX-4538
>             Project: Felix
>          Issue Type: Bug
>          Components: Declarative Services (SCR)
>    Affects Versions: scr-1.8.2
>            Reporter: David Jencks
>            Assignee: David Jencks
>             Fix For: scr-2.0.2
>
>
> Lets say you have a service A and DS components B and C, each with a static reference
to A, and that C also has a static reference to B. Suppose B and C are immediate or there
is some other reason C will be recreated immediately.
> If everything is running, and you unregister A, a service event goes out announcing this.
> If B gets the event first, it will deactivate and activate immediately.  This causes
C to deactivate and reactivate.  However C's service tracker for A has not yet received the
notification that A is gone and with current code C will be created with a stale reference
to A. (in a moment C is notified that A is gone and gets recreated again)
> If C gets the event first, there won't be this problem.



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