[GitHub] [pinot] sajjad-moradi opened a new pull request, #8877: Emit metrics if there's no consuming segment for a partition

[GitBox]

sajjad-moradi opened a new pull request, #8877:
URL: https://github.com/apache/pinot/pull/8877

   ## Description
   Currently if there's no consuming segment for a partition, it remains 
undetected. 
   With the changes in this PR, the following two metrics get emitted if for a 
partition group has no consuming segment.
   - Number of missing consuming segments
   - Maximum duration (in minutes) that a partition hasn't had a consuming 
segment
   The check happens at the beginning of the realtime segment validation 
periodic task.
   
   ## Testing Done
   - Unit tests
   - Ran LLC cluster integration test. Then deleted a consuming segment in 
ideal state and after that ran the periodic task. Here are the MBeans for the 
emitted metrics:
   
![image](https://user-images.githubusercontent.com/8548220/172966583-3ceeba6c-5e7b-4bca-af2e-154e2665490a.png)
   


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