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java.lang.ClassCastException: java.util.Hashtable	at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:99)	at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:103)	at weblogic.cluster.replication.ReplicationManager_WLSkel.invoke(Unknown Source)	at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:455)	at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:396)	at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:726)	at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:391)	at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30)	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:251)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:219)