FYI, I created https://issues.apache.org/jira/browse/KARAF-7113 
<https://issues.apache.org/jira/browse/KARAF-7113> about that.

Regards
JB

> Le 18 avr. 2021 à 22:14, Paul Spencer <[email protected]> a écrit :
> 
> Karaf 4.2.11 with Scheduler feature installed
> 
> 
> I am seeing the following error for Components implementing Runnable without 
> Scheduler configuration and multiple ConfigurationPID. 
> 
> 16:44:46.313 ERROR [pipe-start 195] Bundle org.apache.karaf.scheduler.core 
> [182] EventDispatcher: Error during dispatch. (java.lang.ClassCastException: 
> java.util.ArrayList cannot be cast to java.lang.String)
> java.lang.ClassCastException: java.util.ArrayList cannot be cast to 
> java.lang.String
>       at 
> org.apache.karaf.scheduler.core.WhiteboardHandler.getServiceIdentifier(WhiteboardHandler.java:87)
>  ~[?:?]
>       at 
> org.apache.karaf.scheduler.core.WhiteboardHandler.register(WhiteboardHandler.java:101)
>  ~[?:?]
>       at 
> org.apache.karaf.scheduler.core.WhiteboardHandler.access$100(WhiteboardHandler.java:36)
>  ~[?:?]
>       at 
> org.apache.karaf.scheduler.core.WhiteboardHandler$1.addingService(WhiteboardHandler.java:65)
>  ~[?:?]
>       at 
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:941)
>  ~[osgi.core-6.0.0.jar:?]
>       at 
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:870)
>  ~[osgi.core-6.0.0.jar:?]
>       at 
> org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256) 
> ~[osgi.core-6.0.0.jar:?]
>       at 
> org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229) 
> ~[osgi.core-6.0.0.jar:?]
>       at 
> org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:901)
>  ~[osgi.core-6.0.0.jar:?]
> 
> @Component {configurationPid = {"foo","bar"})
> public class Foo implements Runnable {
> ...
> }
> 
> It appears the Scheduler assumes all runnable components may have valid 
> Scheduler configuration in the @Component annotation or OSGi configuration 
> files. In my case, the Scheduler is failing to set a Service Identifier when 
> there is no scheduler.name configuration and the component's configurationPid 
> is an array.
> 
> Is this a bug?
> 
> 
> 
> Paul Spencer
> 

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