我正在使用在AWS上托管的mosquitto代理。我的客户已连接到经纪人，但一段时间后它已断开连接。它发生了很多次。
我正在传递QOS = 2，retain = true，clean session = false，没有用户名和密码，lwt = none，port = 1883，ip =托管在aws上的服务器，客户端id = timeStamp（始终唯一）
这是我的代码 -
import time
import paho.mqtt.client as mqtt
class MqttCommunication(object):
def __init__(self):
self.current_module = "Mqtt Communication class"
self.clientID = clientId
self.name = thread_name
self.DEBUG = True
self.MQTT_HOST = ""
self.MQTT_PORT = 1883
self.MQTT_USERNAME = ""
self.MQTT_PASSWORD = ""
self.MQTT_CLIENT_ID = self.clientID
self.MQTT_TOPIC = ""
self.MQTT_QOS = 0
self.MQTT_RETAIN = None
self.MQTT_CLEAN_SESSION = None
self.MQTT_LWT = ""
self.client = mqtt.Client(self.MQTT_CLIENT_ID,clean_session=self.MQTT_CLEAN_SESSION)
self.on_connect = None
self.on_disconnect = None
self.on_message = None
self.on_subscribe = None
self.on_unsubscribe = None
self.on_publish = None
self.client.on_connect = self.mqtt_on_connect
#self.client.on_message = self.mqtt_on_message
self.client.on_disconnect = self.mqtt_on_disconnect
self.client.on_subscribe = self.mqtt_on_subscribe
self.client.on_unsubscribe = self.mqtt_on_unsubscribe
self.client.on_publish = self.mqtt_on_publish
def connectHost(self,mqtt_host,mqtt_port,mqtt_username,mqtt_password):
self.MQTT_USERNAME = mqtt_username
self.MQTT_PASSWORD = mqtt_password
self.MQTT_HOST = mqtt_host
self.MQTT_PORT = mqtt_port
try:
self.client.username_pw_set(self.MQTT_USERNAME, self.MQTT_PASSWORD)
self.client.connect(self.MQTT_HOST,self.MQTT_PORT,60)
print self.MQTT_HOST
self.client.loop_start()
except Exception, e:
print "Error connecting to %s:%d: %s" % (mqtt_host, mqtt_port, str(e))
return True
def disconnectHost(self):
self.client.disconnect()
return True
def mqttSettings(self,qos,mqtt_retain,mqtt_clean_session,mqtt_lwt):
self.MQTT_QOS = qos
self.MQTT_RETAIN = mqtt_retain
self.MQTT_CLEAN_SESSION = mqtt_clean_session
self.MQTT_LWT = mqtt_lwt
return True
def subscribeTopic(self,topic):
self.MQTT_TOPIC = topic
self.client.subscribe(self.MQTT_TOPIC, qos=self.MQTT_QOS)
return True
def unsubscribeTopic(self,topic):
self.client.unsubscribe(self.MQTT_TOPIC)
return True
def setClientId(self,clientID):
self.MQTT_CLIENT_ID= clientID
return True
def getClientId(self):
return self.MQTT_CLIENT_ID
def publishData(self,topic,message,qos):
self.client.publish(topic,message,qos)
return True
# The callback for when the client receives a CONNACK response from the server.
def mqtt_on_connect(self,client, userdata, flags, rc):
if rc == 0:
print "Connected to %s:%s" % (self.MQTT_HOST, self.MQTT_PORT)
time.sleep(3)
elif rc == 1:
print "Connection refused - unacceptable protocol version"
elif rc == 2:
print "Connection refused - identifier rejected"
elif rc == 3:
print "Connection refused - server unavailable"
elif rc == 4:
print "Connection refused - bad user name or password"
elif rc == 5:
print "Connection refused - not authorised"
else:
print "Connection failed - result code %d" % (rc)
# The callback for when a PUBLISH message is received from the server.
def mqtt_on_message(self , client, userdata, msg):
#print msg
print(msg.topic+" : "+str(msg.payload))
def mqtt_on_disconnect(self, client, userdata, rc):
if rc != 0:
print("Unexpected disconnection.")
else:
print('hello from disconnect')
def mqtt_on_publish(self, client, userdata, mid):
"""
What to do when a message is published
"""
#print "publish"
def mqtt_on_subscribe(self,client, userdata, mid, granted_qos):
"""
What to do in the event of subscribing to a topic"
"""
#logging.debug("Subscribe with mid " + str(mid) + " received.")
def mqtt_on_unsubscribe(self, client, userdata, mid):
"""
What to do in the event of unsubscribing from a topic
"""
#logging.debug("Unsubscribe with mid " + str(mid) + " received.")
分享一些日志---
1483617475: New connection from xx.xx.xx.xx on port 1883.
1483617475: New client connected from xx.xx.xx.xx as mqttjs_bd875699 (c1, k10$
1483617718: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1483618131: Client 2017-01-05 17:27:18.963994 has exceeded timeout, disconnecti$
1483618131: Socket error on client 2017-01-05 17:27:18.963994, disconnecting.
1483618810: Socket error on client mqttjs_bd875699, disconnecting.
1483618854: New connection from xx.xx.xx.xx on port 1883.
1483618854: New client connected from xx.xx.xx.xx as mqttjs_7aa97fd9 (c1, k10$
1483618865: Socket error on client mqttjs_7aa97fd9, disconnecting.
1483618866: New connection from xx.xx.xx.xx on port 1883.
1483618866: New client connected from xx.xx.xx.xx as mqttjs_25e2f297 (c1, k10$
1483618886: New connection from xx.xx.xx.xx on port 1883.
1483618886: New client connected from xx.xx.xx.xx as 2017-01-05 17:51:23.51980$
1483619018: Socket error on client mqttjs_25e2f297, disconnecting.
1483619019: New connection from xx.xx.xx.xx on port 1883.
1483619019: New client connected from xx.xx.xx.xx as mqttjs_1c8ec6dd (c1, k10$
1483619023: Socket error on client mqttjs_1c8ec6dd, disconnecting.
1483619024: New connection from xx.xx.xx.xx on port 1883.
答案 0 :(得分：2)
您需要启动mqtt客户端网络循环，以便它可以处理保持活动的ping数据包。
通过添加以下行在后台启动循环：
...
def connectHost(self,mqtt_host,mqtt_port,mqtt_username,mqtt_password):
self.MQTT_USERNAME = mqtt_username
self.MQTT_PASSWORD = mqtt_password
self.MQTT_HOST = mqtt_host
self.MQTT_PORT = mqtt_port
try:
self.client.username_pw_set(self.MQTT_USERNAME, self.MQTT_PASSWORD)
print self.client.connect(self.MQTT_HOST,self.MQTT_PORT,60)
self.client.loop_start() # This line
print self.MQTT_HOST
except Exception, e:
print "Error connecting to %s:%d: %s" % (mqtt_host, mqtt_port, str(e))
return True
您可以使用以下内容停止循环：
def disconnectHost(self):
self.client.disconnect()
self.client.loop_stop() # This line
return True
答案 1 :(得分：0)
您不会显示整个代码。 特别是，您不会显示您要进入loop_forever或 阻止代码的其他一些方法。 当我添加它时，我得到了mosquitto -v输出（我的clientId是PAHO）：
1483629832: New connection from 192.9.200.14 on port 1883.
1483629832: New client connected from 192.9.200.14 as PAHO (c0, k60).
1483629832: Sending CONNACK to PAHO (0, 0)
1483629895: Received PINGREQ from PAHO
1483629895: Sending PINGRESP to PAHO