public void doOozieServerHAUpdate() {
    Map<String, Map<String, PropertyUpdater>> highAvailabilityUpdaters = createMapOfOozieServerHAUpdaters();

    if (highAvailabilityUpdaters.get("oozie-site").size() > 0) {
      doMultiHostExportUpdate(highAvailabilityUpdaters, clusterTopology.getConfiguration());
    }
  }
Perform export update processing for HA configuration for Oozie servers.  The properties used
in Oozie HA are not defined in the stack, but need to be added at runtime during an HA
deployment in order to support exporting/redeploying clusters with Oozie HA config.
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/BlueprintConfigurationProcessor.java