code: def _test_remote_message_delay_timeout(self, func, args, dst=None):
      if self.rank != 0:
          return
      # Test the case where remote message is eventually processed on the owner,
      # but the future on the creator times out before the response comes back.
      dst_rank = (
          dst if dst is not None else (self.rank + 1) % self.world_size
      )
      dst_worker = f"worker{dst_rank}"
      # 10 ms timeout
      rref = rpc.remote(dst_worker, func, args=args, timeout=0.001)
      # Future corresponding to the remote creation should time out.
      expected_error = self.get_timeout_error_regex()
      with self.assertRaisesRegex(RuntimeError, expected_error):
          rref._get_future().wait()
  
      # Call to ensure pending callbacks are run.
      wait_until_pending_futures_and_users_flushed()
      # to_here() should now pick up that rpc.remote() creation has failed.
      with self.assertRaisesRegex(RuntimeError, "RRef creation"):
          rref.to_here()
  
      # Test the case where rpc.remote() times out, but to_here() has already
      # started blocking before.
      # NOTE: we only test this when not sending to self, as to_here() calls
      # calls localValue(), which does not send an RPC and thus does not have
      # a timeout. This can be supported by allowing future.wait() to
      # take in an optional timeout (https://github.com/pytorch/pytorch/issues/39280)
      if dst_rank != self.rank:
          slow_rref = rpc.remote(dst_worker, func, args=args, timeout=2)
  
          with self.assertRaisesRegex(RuntimeError, expected_error):
              # to_here() should raise timeout error, since it does not know about the
              # status of rpc.remote().
              slow_rref.to_here(0.001)
      # Note: If we proceed with shutdown, UserRRef will send out a RRefUserDelete
      # but this can be a noop since it may not exist on the owner yet. Later,
      # the owner can process the RRef creation and wait for the delete message,
      # thus leading to a timeout.
      # Therefore, we wait until we get notification that pending owners have
      # been confirmed before sending out RRefUserDeletes.
      if dst_rank != self.rank:
          wait_until_owners_and_forks_on_rank(2, 2, rank=dst_rank)
  
imports: import torch
  import time
  import torch.distributed.rpc
  from torch.distributed.rpc.api import _delete_all_user_and_unforked_owner_rrefs
  from torch.testing._internal.dist_utils import dist_init, wait_until_pending_futures_and_users_flushed, wait_until_owners_and_forks_on_rank, worker_name
  from torch.testing._internal.distributed.rpc.rpc_agent_test_fixture import RpcAgentTestFixture
label_desc: Use image node_id 14 for calling the FaultyAgentRpcTest obj's underlying member method code with example usage: obj._test_remote_message_delay_timeout(func, args, dst) without return types