message: Set 'GRPC_FAIL_FAST' to 'user_caller' in `MultiProcessCluster`.
diff: @@ -234,6 +234,11 @@ class MultiProcessCluster(object):
  server_config = config_pb2.ConfigProto()
  server_config.device_count['GPU'] = 0
  + # Set the environment variable to prevent hanging upon job failure and
  + # restart. Note that it defaults to 'use_caller' at Google, but defaults
  + # to False in OSS.
  + os.environ['GRPC_FAIL_FAST'] = 'use_caller'
  +
  server_lib.Server(
  cluster_spec,
  job_name=task_type,
  