Greg Harris created KAFKA-14797:
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Summary: MM2 does not emit offset syncs when conservative
translation logic exceeds positive max.offset.lag
Key: KAFKA-14797
URL: https://issues.apache.org/jira/browse/KAFKA-14797
Project: Kafka
Issue Type: Bug
Components: mirrormaker
Reporter: Greg Harris
Assignee: Greg Harris
This is a regression in MirrorMaker 2 introduced by KAFKA-12468.
Reproduction steps:
1. Set max.offset.lag to a non-zero value.
2. Set up a 1-1 replication flow which does not skip upstream offsets or have a
concurrent producer to the target topic.
3. Produce more than max.offset.lag records to the source topic and allow
replication to proceed.
4. Examine end offsets, checkpoints and/or target consumer group lag
Expected behavior:
Consumer group lag should be at most max.offset.lag.
Actual behavior:
Consumer group lag is significantly larger than max.offset.lag.
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