MQTT连续重新连接

Question

我构建了一个简单的mqtt模型来测试重新连接。我预计，如果重新连接成功，它将在断开连接后重新连接一次

import paho.mqtt.client as mqtt

def on_connect(client,userdata,flags,reasonCode,properties):
    client.subscribe(topic)
    print('subscribed')

def on_disconnect(client,userdata,rc):
    print('disconnect')

client=mqtt.Client(protocol=5)
client.on_connect=on_connect
client.on_disconnect=on_disconnect
client.connect('192.168.233.133')
client.loop_forever()

但它会产生以下结果

subscribed
disconnect
subscribed
disconnect
subscribed
..........

是什么造成了这个问题