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Servers do not have a common channel to communicate over
java.lang.AssertionError: Servers do not have a common channel to communicate over	at weblogic.cluster.messaging.internal.server.ConfiguredServersMonitorImpl.createConfiguration(ConfiguredServersMonitorImpl.java:124)	at weblogic.cluster.messaging.internal.server.ConfiguredServersMonitorImpl.(ConfiguredServersMonitorImpl.java:55)	at weblogic.cluster.messaging.internal.server.ConfiguredServersMonitorImpl.(ConfiguredServersMonitorImpl.java:28)	at weblogic.cluster.messaging.internal.server.ConfiguredServersMonitorImpl$Factory.(ConfiguredServersMonitorImpl.java:39)	at weblogic.cluster.messaging.internal.server.ConfiguredServersMonitorImpl.getInstance(ConfiguredServersMonitorImpl.java:44)	at weblogic.cluster.messaging.internal.server.UnicastFragmentSocket.(UnicastFragmentSocket.java:47)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)	at java.lang.Class.newInstance0(Class.java:355)	at java.lang.Class.newInstance(Class.java:308)	at weblogic.cluster.FragmentSocketWrapper.getUnicastFragmentSocket(FragmentSocketWrapper.java:76)	at weblogic.cluster.FragmentSocketWrapper.(FragmentSocketWrapper.java:64)	at weblogic.cluster.FragmentSocketWrapper.getInstance(FragmentSocketWrapper.java:47)	at weblogic.cluster.MulticastManager.(MulticastManager.java:158)	at weblogic.cluster.MulticastManager.initialize(MulticastManager.java:111)	at weblogic.cluster.ClusterService.startService(ClusterService.java:196)	at weblogic.server.ServiceActivator.start(ServiceActivator.java:96)	at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)	at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:528)	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)	at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)