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我正在与 Flask 和远程 celery 工作人员一起工作，对于 celery 通信，我使用rabbitmq 作为消息代理。远程芹菜工作人员随机抛出错误，如下所示：-

[2020-09-03 13:49:59,390: CRITICAL/MainProcess] Couldn't ack 20, reason:RecoverableConnectionError(None, 'connection already closed', None, '')
Traceback (most recent call last):
  File "c:\users\g-us01.test\.virtualenvs\celery_doors_integration-o4w-mxzx\lib\site-packages\kombu\message.py", line 131, in ack_log_error
    self.ack(multiple=multiple)
  File "c:\users\g-us01.test\.virtualenvs\celery_doors_integration-o4w-mxzx\lib\site-packages\kombu\message.py", line 126, in ack
    self.channel.basic_ack(self.delivery_tag, multiple=multiple)
  File "c:\users\g-us01.test\.virtualenvs\celery_doors_integration-o4w-mxzx\lib\site-packages\amqp\channel.py", line 1394, in basic_ack
    spec.Basic.Ack, argsig, (delivery_tag, multiple),
  File "c:\users\g-us01.test\.virtualenvs\celery_doors_integration-o4w-mxzx\lib\site-packages\amqp\abstract_channel.py", line 56, in send_method
    raise RecoverableConnectionError('connection already closed')
amqp.exceptions.RecoverableConnectionError: connection already closed

我正在使用 celery 版本 4。有关如何避免此错误的任何指示都会有所帮助。