不能从另一个BlockingConnection或BlockingChannel调用范围调用Rabbitmq start_consuming

Question

我有两个python进程，一个消费者进程和一个生产者进程。每个进程将启动一个rabbitmq连接并生成多个使用者/生产者线程。每个线程将在连接中创建一个通道，并执行消息发送和接收逻辑。在

这是我的消费线索

def consumer_thread(connection, routing_key):
    channel = connection.channel()
    result = channel.queue_declare(exclusive=True)
    queue_name = result.method.queue
    channel.queue_bind(exchange="test", routing_key=routing_key, queue=queue_name)
    thread_name = current_thread().name

    def process(ch, method, properties, body):
        print(f"{thread_name} received {body}")

    channel.basic_consume(process, queue=queue_name, no_ack=True)
    channel.start_consuming()

这是我的制作人线索

^{pr2}$

我用启动一个rabbitmq连接

connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))

然而，当我第一次运行这个消息时，我收到了这个消息

Traceback (most recent call last):
  File "D:\app\cortex-bin\Python36\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "D:\app\cortex-bin\Python36\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "D:\app\cortex\background\core\scratch\test.py", line 18, in consumer_thread
    channel.start_consuming()
  File "D:\app\cortex-bin\Python36\lib\site-packages\pika\adapters\blocking_connection.py", line 1817, in start_consuming
    'start_consuming may not be called from the scope of 'pika.exceptions.RecursionError: start_consuming may not be called from the scope of another BlockingConnection or BlockingChannel callback'

对于所有后续的消息，消费者线程可以很好地接收它们。在

我能知道是什么引起了这个异常吗？谢谢。在

Answer 1

不能从多个线程（comment）访问Pika连接。你的线程必须启动自己的连接和通道。在

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