code: private void startRegular() throws IOException {
      String pwd = DeepwaterCaffeBackend.CAFFE_H2O_DIR;
      ProcessBuilder pb = new ProcessBuilder("python3 backend.py".split(" "));
      pb.environment().put("PYTHONPATH", DeepwaterCaffeBackend.CAFFE_DIR + "python");
      pb.redirectError(ProcessBuilder.Redirect.INHERIT);
      pb.directory(new File(pwd));
      _process = pb.start();
    }
docs: Debug, or if wee find a way to package Caffe without Docker