The interceptors for an EJB are initialised in the create step of EJB deployment, this means that they can be initialised before the services the EJB depends on have been started.

This can be reproduced by deploying a sar that contains a jar that contains a MDB and then starting JBoss, the CachedConnectionInterceptor is initialised before the CachedConnectionManager is available and the following warning is logged: -

12:27:54,179 WARN [EjbModule] Could not load the org.jboss.resource.connectionmanager.CachedConnectionInterceptor interceptor for this container
javax.management.InstanceNotFoundException: jboss.jca:service=CachedConnectionManager is not registered.
at org.jboss.mx.server.registry.BasicMBeanRegistry.get(BasicMBeanRegistry.java:523)
at org.jboss.mx.server.MBeanServerImpl.getAttribute(MBeanServerImpl.java:550)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.<init>(CachedConnectionInterceptor.java:78)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at java.lang.Class.newInstance0(Class.java:350)
at java.lang.Class.newInstance(Class.java:303)
at org.jboss.ejb.EjbModule.addInterceptors(EjbModule.java:930)
at org.jboss.ejb.EjbModule.initializeContainer(EjbModule.java:816)
at org.jboss.ejb.EjbModule.createMessageDrivenContainer(EjbModule.java:602)
at org.jboss.ejb.EjbModule.createContainer(EjbModule.java:569)
at org.jboss.ejb.EjbModule.createService(EjbModule.java:342)
at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:260)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:243)