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java.net.SocketException: No such device at java.net.PlainDatagramSocketImpl.join(Native Method) at java.net.PlainDatagramSocketImpl.join(PlainDatagramSocketImpl.java:134) at java.net.MulticastSocket.joinGroup(MulticastSocket.java:274) at weblogic.cluster.FragmentSocket.initializeMulticastSocket(FragmentSocket.java:92) at weblogic.cluster.FragmentSocket.start(FragmentSocket.java:109) at weblogic.cluster.MulticastManager.startListening(MulticastManager.java:164) at weblogic.cluster.ClusterCommunicationService.initialize(ClusterCommunicationService.java:52) at weblogic.t3.srvr.T3Srvr.initializeHere(T3Srvr.java:922) at weblogic.t3.srvr.T3Srvr.initialize(T3Srvr.java:664) at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:342) at weblogic.Server.main(Server.java:32)