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https://issues.apache.org/jira/browse/KAFKA-21161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bill Bejeck resolved KAFKA-21161.
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Resolution: Fixed
> Source-topic changelog store gets the task's last produced offset instead of
> its last consumed offset when the task writes to its own source topic
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-21161
> URL: https://issues.apache.org/jira/browse/KAFKA-21161
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Bill Bejeck
> Assignee: Bill Bejeck
> Priority: Major
>
> When a KTable uses its source topic as its changelog
> (topology.optimization=all or reuse.ktable.source.topics, or
> Topology#addReadOnlyStateStore) and the same task also writes to that source
> topic, StreamTask#checkpointableOffsets() gives the offset the task produced
> precedence over the offset it consumed:
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