code: private void parseArgs(String[] args) throws IOException {
      if (args == null) {
        return;
      }
      proxyHostname = (args.length > 0) ? args[0] : conf.get(
          StorageServiceConfigKeys.PROXY_THRIFT_HOST_KEY,
          StorageServiceConfigKeys.PROXY_THRIFT_HOST_DEFAULT);
      proxyPortThrift = (args.length > 1) ? Integer.parseInt(args[1]) : conf.getInt(
          StorageServiceConfigKeys.PROXY_THRIFT_PORT_KEY,
          StorageServiceConfigKeys.PROXY_THRIFT_PORT_DEFAULT);
      proxyPortRPC = (args.length > 2) ? Integer.parseInt(args[2]) : conf.getInt(
          StorageServiceConfigKeys.PROXY_RPC_PORT_KEY,
          StorageServiceConfigKeys.PROXY_RPC_PORT_DEFAULT);
    }
docs: Arguments: 1. proxy host name, 2. proxy Thrift port, 3. proxy Hadoop's RPC port