message: Rename internal field.
diff: @@ -484,7 +484,7 @@ class RunConfig(object):
  self._num_ps_replicas = _count_ps(self._cluster_spec)
  self._num_worker_replicas = _count_worker(
  self._cluster_spec, chief_task_type=TaskType.CHIEF)
  - self._global_id = _get_global_id_in_cluster(
  + self._global_id_in_cluster = _get_global_id_in_cluster(
  self._cluster_spec,
  self._task_type,
  self._task_id,
  @@ -495,14 +495,14 @@ class RunConfig(object):
  self._master = _LOCAL_MASTER
  self._num_ps_replicas = 0
  self._num_worker_replicas = 0
  - self._global_id = None # undefined
  + self._global_id_in_cluster = None # undefined
  self._is_chief = self._task_type == TaskType.CHIEF
  else:
  # Local mode.
  self._task_type = task_env.get(_TASK_TYPE_KEY, TaskType.WORKER)
  self._task_id = int(task_env.get(_TASK_ID_KEY, 0))
  - self._global_id = 0
  + self._global_id_in_cluster = 0
  if self._task_type != TaskType.WORKER:
  raise ValueError(
  @@ -537,7 +537,7 @@ class RunConfig(object):
  raise ValueError('If `master` node exists in `cluster`, task_type '
  '`evaluator` is not supported.')
  - self._global_id = _get_global_id_in_cluster(
  + self._global_id_in_cluster = _get_global_id_in_cluster(
  self._cluster_spec,
  self._task_type,
  self._task_id,
  @@ -619,7 +619,7 @@ class RunConfig(object):
  Returns:
  An integer id.
  """
  - return self._global_id
  + return self._global_id_in_cluster
  @property
  def task_type(self):
  