code: public static Pair<AlluxioConfiguration, PathConfiguration> loadClusterAndPathDefaults(
        InetSocketAddress address, AlluxioConfiguration clusterConf, PathConfiguration pathConf)
        throws AlluxioStatusException {
      if (shouldLoadClusterConfiguration(clusterConf)) {
        GetConfigurationPResponse response = loadConfiguration(address, clusterConf);
        clusterConf = loadClusterConfiguration(response, clusterConf);
        pathConf = loadPathConfiguration(response, clusterConf);
      }
      return new Pair<>(clusterConf, pathConf);
    }
docs: Loads both cluster and path level configurations from meta master.
  
  Only client scope properties will be loaded.
  If cluster level configuration has been loaded or the feature of loading configuration from
  meta master is disabled, then no RPC is issued, and both cluster and path level configuration
  is kept as original
  
  @param address the meta master address
  @param clusterConf the cluster level configuration
  @param pathConf the cluster level configuration
  @return both cluster and path level configuration