uvicorn reload KeyboardInterrupt error

[NC-Cj]

My Dependency:

• uvicorn version: 0.29.0
• fastapi version: 0.103.1
• python version: 3.10.11

My code:

# main.py
from fastapi import FastAPI

app = FastAPI()


@app.get('/root')
async def root():
   return "hello"

shell: uvicorn main:app --port 8000 --reload-dir .\app\ --reload

My question:

Modify the code, such as adding a new blank line, hot start will get a large amount of exception information, but the exception does not affect its operation

INFO:     Shutting down
INFO:     Waiting for application shutdown.
INFO:     Application shutdown complete.
INFO:     Finished server process [21476]
Process SpawnProcess-1:
Traceback (most recent call last):
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\multiprocessing\process.py", line 314, in _bootstrap
    self.run()
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\multiprocessing\process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "D:\code\xx\hallo429\venv\lib\site-packages\uvicorn\_subprocess.py", line 78, in subprocess_started
    target(sockets=sockets)
  File "D:\code\xx\hallo429\venv\lib\site-packages\uvicorn\server.py", line 65, in run
    return asyncio.run(self.serve(sockets=sockets))
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\asyncio\runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\asyncio\base_events.py", line 636, in run_until_complete
    self.run_forever()
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\asyncio\base_events.py", line 603, in run_forever    
    self._run_once()
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\asyncio\base_events.py", line 1909, in _run_once     
    handle._run()
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\asyncio\events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "D:\code\xx\hallo429\venv\lib\site-packages\uvicorn\server.py", line 68, in serve
    with self.capture_signals():
  File "C:\Users\xx\AppData\Local\Programs\Python\Python310\lib\contextlib.py", line 142, in __exit__
    next(self.gen)
  File "D:\code\xx\hallo429\venv\lib\site-packages\uvicorn\server.py", line 328, in capture_signals
    signal.raise_signal(captured_signal)
KeyboardInterrupt
INFO:     Started server process [34692]
INFO:     Waiting for application startup.
INFO:     Application startup complete.