Enable Kerberos fails when Ambari server is not on a registered host

2019-01-03 15:28:34,238  WARN [Server Action Executor Worker 39] ServerActionExecutor:471 - Task #39 failed to complete execution due to thrown exception: org.apache.ambari.server.HostNotFoundException:Host not found, hostname=c7401.ambari.apache.org
org.apache.ambari.server.HostNotFoundException: Host not found, hostname=c7401.ambari.apache.org
        at org.apache.ambari.server.state.cluster.ClustersImpl.getHost(ClustersImpl.java:456)
        at org.apache.ambari.server.state.ConfigHelper.getEffectiveDesiredTags(ConfigHelper.java:190)
        at org.apache.ambari.server.state.ConfigHelper.getEffectiveDesiredTags(ConfigHelper.java:174)
        at org.apache.ambari.server.controller.AmbariManagementControllerImpl.findConfigurationTagsWithOverrides(AmbariManagementControllerImpl.java:2431)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.google.inject.internal.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:50)
        at com.sun.proxy.$Proxy134.findConfigurationTagsWithOverrides(Unknown Source)
        at org.apache.ambari.server.state.ConfigHelper.calculateExistingConfigurations(ConfigHelper.java:2158)
        at org.apache.ambari.server.controller.KerberosHelperImpl.calculateConfigurations(KerberosHelperImpl.java:1722)
        at org.apache.ambari.server.controller.KerberosHelperImpl.getActiveIdentities(KerberosHelperImpl.java:1797)
        at org.apache.ambari.server.serveraction.kerberos.KerberosServerAction.calculateServiceIdentities(KerberosServerAction.java:512)
        at org.apache.ambari.server.serveraction.kerberos.KerberosServerAction.processIdentities(KerberosServerAction.java:456)
        at org.apache.ambari.server.serveraction.kerberos.CreatePrincipalsServerAction.execute(CreatePrincipalsServerAction.java:92)
        at org.apache.ambari.server.serveraction.ServerActionExecutor$Worker.execute(ServerActionExecutor.java:550)
        at org.apache.ambari.server.serveraction.ServerActionExecutor$Worker.run(ServerActionExecutor.java:466)
        at java.lang.Thread.run(Thread.java:745)