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https://issues.apache.org/jira/browse/KARAF-6813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Jean-Baptiste Onofré updated KARAF-6813:
----------------------------------------
    Affects Version/s: cellar-4.2.0

> Warning while starting cellar bundle activator
> ----------------------------------------------
>
>                 Key: KARAF-6813
>                 URL: https://issues.apache.org/jira/browse/KARAF-6813
>             Project: Karaf
>          Issue Type: Bug
>          Components: cellar
>    Affects Versions: cellar-4.2.0
>            Reporter: Jean-Baptiste Onofré
>            Assignee: Jean-Baptiste Onofré
>            Priority: Major
>             Fix For: cellar-4.2.1
>
>
> The following warn happens while starting cellar-bundle bundle:
> {code:java}
> 09:01:07.353 WARN [activator-1-thread-4] Error starting activator
> java.lang.UnsupportedOperationException: null
>         at java.util.AbstractCollection.add(AbstractCollection.java:262) 
> ~[?:1.8.0_241]
>         at 
> org.apache.karaf.cellar.hazelcast.HazelcastGroupManager.listGroups(HazelcastGroupManager.java:351)
>  ~[!/:?]
>         at 
> org.apache.karaf.cellar.hazelcast.HazelcastGroupManager.listGroups(HazelcastGroupManager.java:380)
>  ~[!/:?]
>         at 
> org.apache.karaf.cellar.hazelcast.HazelcastGroupManager.listLocalGroups(HazelcastGroupManager.java:297)
>  ~[!/:?]
>         at 
> org.apache.karaf.cellar.bundle.BundleSynchronizer.init(BundleSynchronizer.java:62)
>  ~[!/:?]
>         at 
> org.apache.karaf.cellar.bundle.internal.osgi.Activator.doStart(Activator.java:109)
>  ~[!/:?]
>         at 
> org.apache.karaf.util.tracker.BaseActivator.run(BaseActivator.java:312) [!/:?]
>         at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
> [?:1.8.0_241]
>         at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
> [?:1.8.0_241]
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>  [?:1.8.0_241]
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>  [?:1.8.0_241]
>         at java.lang.Thread.run(Thread.java:748) [?:1.8.0_241] {code}



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