django 调用运行 celery时报错 RecursionError: maximum recursion depth exceeded while calling a Python object

  File "C:\Python38\lib\site-packages\redis\connection.py", line 567, in connect
    self.on_connect()
  File "C:\Python38\lib\site-packages\redis\connection.py", line 663, in on_connect
    self.send_command('SELECT', self.db)
  File "C:\Python38\lib\site-packages\redis\connection.py", line 725, in send_command
    self.send_packed_command(self.pack_command(*args),
  File "C:\Python38\lib\site-packages\redis\connection.py", line 701, in send_packed_command
    self.check_health()
  File "C:\Python38\lib\site-packages\redis\connection.py", line 685, in check_health
    if nativestr(self.read_response()) != 'PONG':
  File "C:\Python38\lib\site-packages\redis\connection.py", line 749, in read_response
    self.disconnect()
  File "C:\Python38\lib\site-packages\kombu\transport\redis.py", line 959, in disconnect
    channel._on_connection_disconnect(self)
  File "C:\Python38\lib\site-packages\kombu\transport\redis.py", line 556, in _on_connection_disconnect
    self.connection.cycle._on_connection_disconnect(connection)
  File "C:\Python38\lib\site-packages\kombu\transport\redis.py", line 280, in _on_connection_disconnect
    self.poller.unregister(connection._sock)
  File "C:\Python38\lib\site-packages\kombu\utils\eventio.py", line 269, in unregister
    fd = fileno(fd)
  File "C:\Python38\lib\site-packages\kombu\utils\compat.py", line 99, in fileno
    if isinstance(f, numbers.Integral):
  File "C:\Python38\lib\abc.py", line 98, in __instancecheck__
    return _abc_instancecheck(cls, instance)
RecursionError: maximum recursion depth exceeded while calling a Python object
[08/Aug/2020 18:00:53] "GET /course/ HTTP/1.1" 500 5459037

celery会使用redis数据库，这时有可能是因为数据库连接redis数据库的密码错误导致的。确认一下密码。

BROKER_URL = 'redis://:xxxxx@192.168.100.159:6379/1'

# 后端结果存储
CELERY_RESULT_BACKEND = 'redis://:xxxxx@192.168.100.159:6379/2'