code: def test_handle_hanging(serve_with_client):
      # With https://github.com/ray-project/ray/issues/20971
      # the following will hang forever.
  
      @serve.deployment
      def f():
          return 1
  
      handle = serve.run(f.bind())
  
      for _ in range(5):
          assert handle.remote().result() == 1
          time.sleep(0.5)
  
      ray.shutdown()
  
file_path: ray/python/ray/serve/tests/test_ray_client.py
imports: import random
  import subprocess
  import sys
  import time
  import pytest
  import requests
  import ray
  from ray import serve
  from ray._private.test_utils import run_string_as_driver
label_desc: Use image node_id 6 for calling a global function with example usage: test_handle_hanging(serve_with_client) and returns: int