GerryYuan edited a comment on pull request #5694:
URL: https://github.com/apache/skywalking/pull/5694#issuecomment-716375827


   > Yes, the question is about that,but my concern is more about, could 
rabbitmq and mqtt share one request? Sorry, I am far from understanding what 
mqtt did.
   
   Rabbitmq itself also supports the mqtt protocol, but it needs to be 
introduced as a plug-in, which is relatively complex. At present, we have 
independently deployed the mqtt broker for link tracking. In the IOT business 
scenario, this deployment method is more common. Of course, if rabbitmq 
installs the mqtt plug-in, it will not have the problem of tracking links now. 
Because our mqtt plugin enhances and tracks the mqtt client (eclipse PAHO) of 
Java, there is no coexistence problem.
   
   Test scenarios:
   If mqtt broker is rabbitmq, mqtt client is eclipse PAHO, then the topology 
is as follows:
   
![image](https://user-images.githubusercontent.com/11907624/97149948-64eb0300-17a8-11eb-966f-caf925317a34.png)
   
![image](https://user-images.githubusercontent.com/11907624/97149671-09b91080-17a8-11eb-8875-116387c51972.png)
   
   


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