[jira] [Work started] (FELIX-4394) Race problems in DependencyManager Configuration Dependency

["Pierre De Rop (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FELIX-4394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on FELIX-4394 started by Pierre De Rop.

> Race problems in DependencyManager Configuration Dependency
> -----------------------------------------------------------
>
>                 Key: FELIX-4394
>                 URL: https://issues.apache.org/jira/browse/FELIX-4394
>             Project: Felix
>          Issue Type: Bug
>          Components: Dependency Manager
>    Affects Versions: dependencymanager-3.1.0
>            Reporter: Pierre De Rop
>            Assignee: Pierre De Rop
>         Attachments: FELIX-4394.patch
>
>
> There are some synchronization issues in the ConfigurationDependencyImpl:
> 1) in the stop(DependencyService service) method, if the current size of the "m_services" list is greater than 1, then the 'service' method parameter to be removed is not removed from the internal "m_services" list. 
> Also, if the list size is 1, then the service is removed from the list, but outside the synchronized block.
> 2) in the updated(Dictionary settings) method: the service list (m_services) is iterated outside a synchronized block.
> 3) the ensureActive method should be synchronized since it checks the m_services list size.
> 4) I'm sometimes seeing the following WARN message logged from the ConfigurationDependencyImpl.updated class:
>                     m_logger.log(Logger.LOG_ERROR, "Service " + ds + " with configuration dependency " + this + " could not be instantiated.");



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