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https://issues.apache.org/jira/browse/FELIX-6274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17106307#comment-17106307
]
Timothy James Ward commented on FELIX-6274:
-------------------------------------------
I've made a failing test case at [https://github.com/apache/felix-dev/pull/21]
There's definitely a class space issue from using a bundle context with a
different view - it may actually be that SCR is failing to protect itself from
the different view of the component bundle.
{{java.lang.ClassCastException: org.apache.felix.log.LogServiceImpl cannot be
cast to org.osgi.service.log.LogService }}{{at
org.apache.felix.scr.impl.logger.LogServiceSupport.<init>(LogServiceSupport.java:60)
}}{{at
org.apache.felix.scr.impl.logger.LogServiceEnabledLogger$1.addingService(LogServiceEnabledLogger.java:62)
}}{{at
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:941)
}}{{at
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:870)
}}{{at
org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)
}}{{at
org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183)
}}{{at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:318)
}}{{at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:261)
}}{{at
org.apache.felix.scr.impl.logger.LogServiceEnabledLogger.<init>(LogServiceEnabledLogger.java:82)}}{{at
org.apache.felix.scr.impl.logger.BundleLogger.<init>(BundleLogger.java:34)
}}{{at
org.apache.felix.scr.impl.BundleComponentActivator.<init>(BundleComponentActivator.java:201)
}}{{at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:551)
}}{{at org.apache.felix.scr.impl.Activator.access$200(Activator.java:69) }}{{at
org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:424)
}}{{at
org.apache.felix.scr.impl.AbstractExtender.createExtension(AbstractExtender.java:196)
}}{{at
org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:169)
}}{{at
org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:49)}}
{{...}}
> Potential Class Space problems with multiple Log Service APIs
> -------------------------------------------------------------
>
> Key: FELIX-6274
> URL: https://issues.apache.org/jira/browse/FELIX-6274
> Project: Felix
> Issue Type: Bug
> Components: Declarative Services (SCR)
> Affects Versions: scr-2.1.20
> Reporter: Timothy James Ward
> Priority: Major
> Fix For: scr-2.1.22
>
>
> The Declarative Services specification requires SCR to inject Logger
> implementations into a DS component (if requested). In order to find a
> suitable Log Service SCR uses its *own* BundleContext, not the context of the
> bundle being extended. This means that if the bundle being extended has a
> different view of the Log Service API then the injection will fail with a
> ClassCastException.
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