timothy65535 edited a comment on issue #981:
URL: 
https://github.com/apache/incubator-kyuubi/issues/981#issuecomment-908842314


   # Implementation
   
   First of all, we need a store which can help us to save / index /query 
events, and supports remove expired events when reach a threshold. 
`org.apache.spark.status.ElementTrackingStore` meets our needs. Then the 
listener monitors the occurrence of various events and saves them in the store.
   
   In addition, if `spark.eventLog.enabled` is enable, sparkhistoryserver will 
consume events and replay them.
   
   ## Work Flow
   
   
![image](https://user-images.githubusercontent.com/86483005/131428702-42780d08-5663-469e-9be9-79f0fe2726ea.png)


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