lianetm commented on PR #15909:
URL: https://github.com/apache/kafka/pull/15909#issuecomment-2104982949

   Just to clarify what we're getting here, related to @AndrewJSchofield 's 
very valid point. With this we get the time between internal poll events, which 
do not translate exactly to calls to consumer.poll depending on the situation. 
So the log here will be very helpful to tune the config in cases where the 
delay that led to leaving the group was due to the client app taking too long 
to process messages after a call to poll. It would be less accurate in cases 
where the delay is due to the fetch not getting messages for instance, since we 
internally generate more poll events while at it. 
   
   


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