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java.lang.NullPointerException at weblogic.utils.collections.NumericValueHashtable.containsKey(NumericValueHashtable.java:138) at weblogic.cluster.replication.ReplicationManager.getSecondaryDistributionNames(ReplicationManager.java:908) at weblogic.cluster.ClusterRuntime.getSecondaryDistributionNames(ClusterRuntime.java:100) at java.lang.reflect.Method.invoke(Native Method) at weblogic.management.internal.DynamicMBeanImpl.getAttribute(DynamicMBeanImpl.java:432) at weblogic.management.internal.DynamicMBeanImpl.getAttribute(DynamicMBeanImpl.java:394) at com.sun.management.jmx.MBeanServerImpl.getAttribute(MBeanServerImpl.java:1181) at com.sun.management.jmx.MBeanServerImpl.getAttribute(MBeanServerImpl.java:1151) at weblogic.management.internal.MBeanProxy.getAttribute(MBeanProxy.java:225) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:158) at $Proxy44.getSecondaryDistributionNames(Unknown Source) at weblogic.management.console.pages._panels._mbean._server._jspService(_server.java:5705) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)