Live reload shuts down waved on Windows.

[mturoci]

Discussed in #2067

^{Originally posted by MisterArbazzz July 7, 2023}
Why does live reloading not work in my H2O Wave app?

I am unable to see the changes in the Wave app as I am coding, and I have to restart the app to see the effect.

I trying to run this demo app and making some changes in it but whenever i make change to the code.

I get this error

WARNING:  StatReload detected changes in 'app.py'. Reloading...
INFO:     Started server process [8720]
INFO:     Waiting for application startup.
ERROR:    Traceback (most recent call last):
  File "c:\python37\lib\site-packages\anyio\_core\_sockets.py", line 167, in try_connect
    stream = await asynclib.connect_tcp(remote_host, remote_port, local_address)
  File "c:\python37\lib\site-packages\anyio\_backends\_asyncio.py", line 1628, in connect_tcp
    StreamProtocol, host, port, local_addr=local_addr
  File "c:\python37\lib\asyncio\base_events.py", line 962, in create_connection
    raise exceptions[0]
  File "c:\python37\lib\asyncio\base_events.py", line 949, in create_connection
    await self.sock_connect(sock, address)
  File "c:\python37\lib\asyncio\selector_events.py", line 473, in sock_connect
    return await fut
  File "c:\python37\lib\asyncio\selector_events.py", line 503, in _sock_connect_cb
    raise OSError(err, f'Connect call failed {address}')
ConnectionRefusedError: [Errno 10061] Connect call failed ('127.0.0.1', 10101)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "c:\python37\lib\site-packages\httpcore\_exceptions.py", line 10, in map_exceptions
    yield
  File "c:\python37\lib\site-packages\httpcore\_backends\anyio.py", line 117, in connect_tcp
    local_host=local_address,
  File "c:\python37\lib\site-packages\anyio\_core\_sockets.py", line 225, in connect_tcp
    raise OSError("All connection attempts failed") from cause
OSError: All connection attempts failed

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "c:\python37\lib\site-packages\httpx\_transports\default.py", line 60, in map_httpcore_exceptions
    yield
  File "c:\python37\lib\site-packages\httpx\_transports\default.py", line 353, in handle_async_request
    resp = await self._pool.handle_async_request(req)
  File "c:\python37\lib\site-packages\httpcore\_async\connection_pool.py", line 262, in handle_async_request
    raise exc
  File "c:\python37\lib\site-packages\httpcore\_async\connection_pool.py", line 245, in handle_async_request
    response = await connection.handle_async_request(request)
  File "c:\python37\lib\site-packages\httpcore\_async\connection.py", line 92, in handle_async_request
    raise exc
  File "c:\python37\lib\site-packages\httpcore\_async\connection.py", line 69, in handle_async_request
    stream = await self._connect(request)
  File "c:\python37\lib\site-packages\httpcore\_async\connection.py", line 117, in _connect
    stream = await self._network_backend.connect_tcp(**kwargs)
  File "c:\python37\lib\site-packages\httpcore\_backends\auto.py", line 36, in connect_tcp
    socket_options=socket_options,
  File "c:\python37\lib\site-packages\httpcore\_backends\anyio.py", line 121, in connect_tcp
    stream._raw_socket.setsockopt(*option)  # type: ignore[attr-defined] # pragma: no cover
  File "c:\python37\lib\contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "c:\python37\lib\site-packages\httpcore\_exceptions.py", line 14, in map_exceptions
    raise to_exc(exc) from exc
httpcore.ConnectError: All connection attempts failed

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "c:\python37\lib\site-packages\starlette\routing.py", line 686, in lifespan
    async with self.lifespan_context(app) as maybe_state:
  File "c:\python37\lib\site-packages\starlette\routing.py", line 575, in __aenter__
    await self._router.startup()
  File "c:\python37\lib\site-packages\starlette\routing.py", line 663, in startup
    await handler()
  File "c:\python37\lib\site-packages\h2o_wave\server.py", line 303, in _register
    raise exception
  File "c:\python37\lib\site-packages\h2o_wave\server.py", line 293, in _register
    key_secret=_config.app_access_key_secret,
  File "c:\python37\lib\site-packages\h2o_wave\server.py", line 241, in call
    content=marshal({method: kwargs}),
  File "c:\python37\lib\site-packages\httpx\_client.py", line 1861, in post
    extensions=extensions,
  File "c:\python37\lib\site-packages\httpx\_client.py", line 1530, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
  File "c:\python37\lib\site-packages\httpx\_client.py", line 1621, in send
    history=[],
  File "c:\python37\lib\site-packages\httpx\_client.py", line 1648, in _send_handling_auth
    history=history,
  File "c:\python37\lib\site-packages\httpx\_client.py", line 1682, in _send_handling_redirects
    response = await self._send_single_request(request)
  File "c:\python37\lib\site-packages\httpx\_client.py", line 1719, in _send_single_request
    response = await transport.handle_async_request(request)
  File "c:\python37\lib\site-packages\httpx\_transports\default.py", line 353, in handle_async_request
    resp = await self._pool.handle_async_request(req)
  File "c:\python37\lib\contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "c:\python37\lib\site-packages\httpx\_transports\default.py", line 77, in map_httpcore_exceptions
    raise mapped_exc(message) from exc
httpx.ConnectError: All connection attempts failed

ERROR:    Application startup failed. Exiting.

and app shuts down

i am using the latest h2o-wave Version: 0.26.1
with python 3.7.9
on windows 11

I need to see the changes in the wave ui as i am coding (also i tried it using both vscode and pycharm)
Can someone please assist me. @mturoci

[mturoci]

Tmp workaround: pip install uvicorn==0.21.1 as this was introduced in latest, 0.22.0.

Caused by encode/uvicorn#1584.