[jira] [Resolved] (FELIX-4237) Updating a configuration may deactivate/active component multiple times

["David Jencks (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FELIX-4237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Jencks resolved FELIX-4237.
---------------------------------
       Resolution: Cannot Reproduce
         Assignee: David Jencks
    Fix Version/s: scr-2.0.4

I can't find the relevant parts of the test case any more, namely the exact component configurations and code.  The most obvious reason this is happening is that D1 doesn't have a modified method, so it has to be recycled.  This is going to cause anything with a mandatory dependency on it to recycle.

I would guess the effect of when you get the service from the service tracker means the components aren't immediate and unless you get the service promptly it's deactivated since there are no references to it.

> Updating a configuration may deactivate/active component multiple times
> -----------------------------------------------------------------------
>
>                 Key: FELIX-4237
>                 URL: https://issues.apache.org/jira/browse/FELIX-4237
>             Project: Felix
>          Issue Type: Bug
>          Components: Declarative Services (SCR)
>    Affects Versions: scr-1.6.2
>            Reporter: Thomas Diesler
>            Assignee: David Jencks
>             Fix For: scr-2.0.4
>
>
> * ServiceD has a mandatory unary reference to ServiceD1
> * ServiceD1 is backed by a configuration in ConfigurationAdmin (1.6.0)
> * Activate the services with no configuration
> * Create and update the configuration for ServiceD1
> The observed behaviour is
> * ServiceD gets deactivated
> * ServiceD1 gets deactivated
> * New instance of ServiceD1 is constructed and activated with the configuration
> * ServiceD1 is bound to to a new instance of ServiceD and ServiceD gets activated
> following this ServiceD1 may get deactivated again causing the above sequence to get repeated.
> In a large dependency graph this would deactivate/activate all components in the graph. Component activation may not be cheap and should not be done repeatedly with the same configuration passed in.



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