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https://issues.apache.org/jira/browse/FLINK-40894?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-40894:
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    Labels: pull-request-available  (was: )

> Expose counters for unmatched retractions in SinkUpsertMaterializer and 
> KeyedLookupJoinWrapper
> ----------------------------------------------------------------------------------------------
>
>                 Key: FLINK-40894
>                 URL: https://issues.apache.org/jira/browse/FLINK-40894
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Runtime
>            Reporter: Martijn Visser
>            Priority: Minor
>              Labels: pull-request-available
>
> Both SinkUpsertMaterializer and KeyedLookupJoinWrapper only log when a 
> retraction finds no matching row or when state was cleared by TTL. Wrong 
> results from non-deterministic updates or a too short TTL are therefore 
> invisible in metrics. LateralSnapshotJoinOperator already exposes 
> {{numUnmatchedBuildRetractions}} for the same situation. We should add the 
> same counter to both operators, the V2 and the watermark compacting 
> materializer included.



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