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https://issues.apache.org/jira/browse/OPENEJB-1248?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Blevins resolved OPENEJB-1248.
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Resolution: Unresolved
Closing this hoping it was resolved. Reopen if this shows up again.
> DiscoveryRegistry doesn't work (ConcurrentModificationException)
> ----------------------------------------------------------------
>
> Key: OPENEJB-1248
> URL: https://issues.apache.org/jira/browse/OPENEJB-1248
> Project: OpenEJB
> Issue Type: Bug
> Affects Versions: 3.1.x
> Reporter: David Jencks
> Fix For: 3.1.x
>
> Attachments: OPENEJB-1248.patch
>
>
> I get:
> Module 35/41 org.apache.geronimo.configs/openejb-deployer/3.0-SNAPSHOT/car
> Exception in thread "Multicast Discovery Agent Notifier"
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
> at
> org.apache.openejb.server.DiscoveryRegistry.serviceAdded(DiscoveryRegistry.java:121)
> at
> org.apache.openejb.server.discovery.MulticastDiscoveryAgent$Listener$3.run(MulticastDiscoveryAgent.java:437)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:637)
> Looking at the code it clearly needs a lot of synchronization. Perhaps the
> author thought that
> List<DiscoveryListener> getListeners(){
> return Collections.unmodifiableList(listeners);
> }
> would copy the list of listeners instead of providing a view that reflects
> all changes to the underlying list.
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