Bill Bejeck created KAFKA-7190:
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Summary: Under low traffic conditions purging repartition topics
cause WARN statements about UNKNOWN_PRODUCER_ID
Key: KAFKA-7190
URL: https://issues.apache.org/jira/browse/KAFKA-7190
Project: Kafka
Issue Type: Improvement
Components: core, streams
Affects Versions: 1.1.1, 1.1.0
Reporter: Bill Bejeck
When a streams application has little traffic, then it is possible that
consumer purging would delete
even the last message sent by a producer (i.e., all the messages sent by
this producer have been consumed and committed), and as a result, the broker
would delete that producer's ID. The next time when this producer tries to
send, it will get this UNKNOWN_PRODUCER_ID error code, but in this case,
this error is retriable: the producer would just get a new producer id and
retries, and then this time it will succeed.
Possible fixes could be on the broker side, i.e., delaying the deletion of the
produderIDs for a more extended period or on the streams side developing a more
conservative approach to deleting offsets from repartition topics
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