问运行具有Gunicorn got的烧瓶“错误处理请求[计数必须是正整数(got 0)]”

EN

# gunicorn.conf.py
workers = 5
worker_class = "sync"  # or "gevent"
bind = "0.0.0.0:8080"

>>> gunicorn application:app -c ./gunicorn.conf.py

Starting gunicorn 20.1.0
Listening at: http://0.0.0.0:8080 (69063)
Using worker: sync   # or "gevent"
Booting worker with pid: 69065
Booting worker with pid: 69066
Booting worker with pid: 69067
Booting worker with pid: 69068
Booting worker with pid: 69069
[69065] [ERROR] Error handling request
Traceback (most recent call last):
  File "/Users/xxx/.virtualenvs/yyy/lib/python3.8/site-packages/gunicorn/workers/sync.py", line 182, in handle_request
    resp.write_file(respiter)
  File "/Users/xxx/.virtualenvs/yyy/lib/python3.8/site-packages/gunicorn/http/wsgi.py", line 385, in write_file
    if not self.sendfile(respiter):
  File "/Users/xxx/.virtualenvs/yyy/lib/python3.8/site-packages/gunicorn/http/wsgi.py", line 375, in sendfile
    self.sock.sendfile(respiter.filelike, count=nbytes)
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/socket.py", line 482, in sendfile
    return self._sendfile_use_sendfile(file, offset, count)
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/socket.py", line 346, in _sendfile_use_sendfile
    self._check_sendfile_params(file, offset, count)
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/socket.py", line 460, in _check_sendfile_params
    raise ValueError(
ValueError: count must be a positive integer (got 0)