Gwen Shapira created KAFKA-8338:
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Summary: Improve consumer offset expiration logic to take
subscription into account
Key: KAFKA-8338
URL: https://issues.apache.org/jira/browse/KAFKA-8338
Project: Kafka
Issue Type: Improvement
Reporter: Gwen Shapira
Currently, we expire consumer offsets for a group after the group is considered
gone.
There is a case where the consumer group still exists, but is now subscribed to
different topics. In that case, the offsets of the old topics will never expire
and if lag is monitored, the monitors will show ever-growing lag on those
topics.
We need to improve the logic to expire the consumer offsets if the consumer
group didn't subscribe to specific topics/partitions for enough time.
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