Cannot call "send" once a close message has been sent.

[tchaton]

Describe the bug

ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/uvicorn/protocols/websockets/websockets_impl.py", line 240, in run_asgi
    result = await self.app(self.scope, self.asgi_receive, self.asgi_send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/uvicorn/middleware/proxy_headers.py", line 69, in __call__
    return await self.app(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/applications.py", line 123, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/middleware/errors.py", line 151, in __call__
    await self.app(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/middleware/cors.py", line 77, in __call__
    await self.app(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 65, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/_exception_handler.py", line 64, in wrapped_app
    raise exc
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    await app(scope, receive, sender)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/routing.py", line 756, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/routing.py", line 776, in app
    await route.handle(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/routing.py", line 373, in handle
    await self.app(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/routing.py", line 96, in app
    await wrap_app_handling_exceptions(app, session)(scope, receive, send)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/_exception_handler.py", line 64, in wrapped_app
    raise exc
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    await app(scope, receive, sender)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/routing.py", line 94, in app
    await func(session)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/fastapi/routing.py", line 348, in app
    await dependant.call(**values)
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/gradio/routes.py", line 265, in notify_changes
    await websocket.close()
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/websockets.py", line 203, in close
    await self.send(
  File "/home/zeus/miniconda3/envs/cloudspace/lib/python3.10/site-packages/starlette/websockets.py", line 112, in send
    raise RuntimeError('Cannot call "send" once a close message has been sent.')
RuntimeError: Cannot call "send" once a close message has been sent.

Have you searched existing issues? 🔎

• I have searched and found no existing issues

Reproduction

import os
import gradio as gr
import torch
import requests
from torchvision import transforms

model = torch.hub.load("pytorch/vision:v0.6.0", "resnet18", weights='ResNet18_Weights.IMAGENET1K_V1').eval()
response = requests.get("https://git.io/JJkYN")
labels = response.text.split("\n")


def predict(inp):
    inp = transforms.ToTensor()(inp).unsqueeze(0)
    with torch.no_grad():
        prediction = torch.nn.functional.softmax(model(inp)[0], dim=0)
        confidences = {labels[i]: float(prediction[i]) for i in range(1000)}
    return confidences


dir_path = os.path.dirname(os.path.realpath(__file__))
demo = gr.Interface(
    fn=predict,
    inputs=gr.components.Image(type="pil"),
    outputs=gr.components.Label(num_top_classes=3),
    examples=[[f"{dir_path}/cheetah.jpg"]],
)

demo.launch()

Screenshot

NA

Logs

NA

System Info

⚡ ~ python -V
Python 3.10.10
⚡ ~ pip list | grep gradio
gradio                    3.50.2
gradio_client             0.6.1

Severity

I can work around it

[freddyaboulton]

Hi @tchaton ? Does this happen in the latest version (4.30.1)? We don't release back-patches for previous versions.

[abidlabs]

Going to close for now, can reopen with clarification