message: MultiProcessRunner: Add logging of TF_CONFIG at the start of subprocess for debugging.
diff: @@ -816,6 +816,7 @@ class _ProcFunc(object):
  pid = os.getpid()
  logging.info('Subprocess with PID %d (%s, %d) is now being started.', pid,
  test_env.task_type, test_env.task_id)
  + logging.info('TF_CONFIG: %r', os.environ['TF_CONFIG'])
  # The thread will be dedicated to checking messages from the parent process.
  threading.Thread( # pylint: disable=unexpected-keyword-arg
  