code: def _get_worker_handles(
      deployment_name: str, app_name: str = SERVE_DEFAULT_APP_NAME
  ):
      id = DeploymentID(deployment_name, app_name)
      controller = serve.context._global_client._controller
      deployment_dict = ray.get(
          controller._all_running_replicas.remote()
      )
  
      return [replica.actor_handle for replica in deployment_dict[id]]
  
file_path: ray/python/ray/serve/tests/test_failure.py
imports: import os
  import sys
  import time
  import pytest
  import requests
  import ray
  from ray import serve
  from ray._private.test_utils import SignalActor, wait_for_condition
  from ray.serve._private.common import DeploymentID
  from ray.serve._private.constants import SERVE_DEFAULT_APP_NAME
label_desc: Use image node_id 5 for calling a global function with example usage: _get_worker_handles(deployment_name, app_name) and returns: unknown