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https://issues.apache.org/jira/browse/KAFKA-14797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Egerton resolved KAFKA-14797.
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Resolution: Fixed
> 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
> Priority: Blocker
> Fix For: 3.5.0, 3.4.1, 3.3.3
>
>
> 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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