code: def _training_thread(self, grid, train):
      self.training_error = None
      try:
          print("starting initial grid...")
          grid.train(x=list(range(4)), y=4, training_frame=train)
      except Exception as e:
          print("Error while training")
          print(e)
          self.training_error = e
  
file_path: h2o-3/h2o-hadoop-common/tests_fault_tolerance/python/test_grid_auto_recover.py
imports: import sys
  import os
  import time
  from tests import pyunit_utils
  import fault_tolerance_utils
  import h2o
  from h2o.grid.grid_search import H2OGridSearch
  from h2o.estimators.gbm import H2OGradientBoostingEstimator
  from h2o.exceptions import H2OResponseError
  import unittest
  import threading
label_desc: Use image node_id 1 for calling the GridAutoRecoveryTest obj's underlying member method code with example usage: obj._training_thread(grid, train) without return types