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Create two ejb modules with ejbs, as described in issue 77470 (in fact, this bug may be related to that bug.) On restart of IDE, open sun-ejb-jar.xml in the config editor. Observe there are _two_ EJB nodes present "ClientBean" and "ServiceBean". ClientBean is the only bean that should exist. It looks like the merged annotation provider might be misinterpreting an ejb-ref annotation as an ejb annotation (again, see issue 77470.)
Already fixed.