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Posted to jira@kafka.apache.org by "Bill Bejeck (Jira)" <ji...@apache.org> on 2026/09/30 13:31:00 UTC

[jira] [Resolved] (KAFKA-21161) 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

     [ https://issues.apache.org/jira/browse/KAFKA-21161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bill Bejeck resolved KAFKA-21161.
---------------------------------
    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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