venkata91 commented on pull request #33253:
URL: https://github.com/apache/spark/pull/33253#issuecomment-885391140


   > > killedTaskSummary when original attempt succeeded - 
https://user-images.githubusercontent.com/8871522/126575315-5e766870-eab4-4afc-a02f-ede63148692b.png
   > > killedTaskSummary when speculative attempt succeeded - 
https://user-images.githubusercontent.com/8871522/126575323-0c7c2fc9-5f28-4b2c-a47e-bbd4ceed2597.png
   > 
   > I know your attempt succeeded but as I hit, `killedTasksSummary` can be 
empty.
   > It's not expected behavior right?
   > If so, we should investigate the cause and resolve it.
   
   Ah I see, currently we are populating `killedTasksSummary` in 
`SpeculationStageSummary` only if the killed reason is `another attempt 
succeeded`. For other reasons, we are not populating it since this is mainly 
specific to speculation to understand how many speculated tasks killed vs 
original tasks killed. So yeah `killedTasksSummary` can be empty. What do you 
think should be the right behavior? Also 


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