Zaiming Shi created KAFKA-3470:
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             Summary: Consumer group coordinator should take commit requests as 
effective as heartbeats
                 Key: KAFKA-3470
                 URL: https://issues.apache.org/jira/browse/KAFKA-3470
             Project: Kafka
          Issue Type: Improvement
            Reporter: Zaiming Shi


Group coordinator does not reset heartbeat timer when commit request is 
received.
This may lead to unnecessary session timeouts when a consumer sends
sync commit requests so frequently that causes heartbeat requests to be
delayed.

Presumably (as I do not know Kafka code well):
Commit requests (v1/v2) have all data fields for a heartbeat request,
If they are taken as effective as heartbeat requests, we should have
better group stability.

[For reference]
previous discussions in: us...@kafka.apache.org
mail title:     consumer group, why commit requests are not considered as 
effective heartbeats?




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