static String[] parseResourceManagers(Map<String, String> properties) {
    final String resourceManagerNames = properties.get("yarn.resourcemanager.ha.rm-ids");
    return splitAndTrimStrings(resourceManagerNames);
  }
Parses out the list of resource managers associated with this yarn-site configuration.

@param properties config properties for this cluster

@return array of Strings that indicate the ResourceManager names for this HA cluster
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/BlueprintConfigurationProcessor.java