[GitHub] [rocketmq-exporter] RichardChengshaojin opened a new issue #78: Metrics rocketmq_consumer_offset's tag countOfOnlineConsumers doesn't behave as expected

Wed, 01 Dec 2021 23:22:36 -0800 


RichardChengshaojin opened a new issue #78:
URL: https://github.com/apache/rocketmq-exporter/issues/78


   **Describe the bug**
   I deleted the subscription group, then queried the metrics 
**rocketmq_consumer_offset** in prometheus, and found the value of tag 
**countOfOnlineConsumers** was still 1.
   
   **To Reproduce**
   Steps to reproduce the behavior:
   1. Delete the subscription group through rocketmq console or the script 
provided by rocket mq `sh mqadmin deleteSubGroup -n namesrv -c cluster -g 
groupName`, say groupName is **test-accumulate-consumer-1**
   2. Query metrics through prometheus, 
`rocketmq_group_diff{group="test-accumulate-consumer-1"}`
   3. Result is 
   
![图片](https://user-images.githubusercontent.com/10008660/144375758-5c6c1850-dbce-40fa-b79e-00882bed04d6.png)
   4. As shown in console, find no consumer
   5. 
   
![图片](https://user-images.githubusercontent.com/10008660/144375915-38551f3a-e3ed-4cb0-9b61-72ddd0984160.png)
   
   **Expected behavior** 
   Expect the value of tag `countOfOnlineConsumers`  to be `0` rather than `1`. 
As shown below
   
`rocketmq_group_diff{countOfOnlineConsumers="0",group="test-accumulate-consumer-1",instance="172.20.22.30:5557",job="dev-metrics",msgModel="1",topic="test-accumulate"}`
   
   
   **Desktop (please complete the following information):**
    - Rocketmq broker version is V4_7_0
   
   **Additional context**
   I found a similar issue here: 
https://github.com/apache/rocketmq-exporter/issues/62
   


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