Lianet Magrans created KAFKA-15954:
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Summary: Review minimal effort approach on consumer last heartbeat
on unsubscribe
Key: KAFKA-15954
URL: https://issues.apache.org/jira/browse/KAFKA-15954
Project: Kafka
Issue Type: Task
Components: clients, consumer
Reporter: Lianet Magrans
Currently the legacy and new consumer follows a minimal effort approach when
sending a leave group (legacy) or last heartbeat request (new consumer). The
request is sent without waiting/handling any response. This behaviour applies
when the consumer is being closed or when it unsubscribes.
For the case when the consumer is being closed, (which is a "terminal" state),
it makes sense to just follow a minimal effort approach for "properly" leaving
the group. But for the case of unsubscribe, it would maybe make sense to put a
little more effort in making sure that the last heartbeat is sent and received
by the broker. Note that unsubscribe could a temporary state, where the
consumer might want to re-join the group at any time.
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