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https://issues.apache.org/jira/browse/FLINK-28303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tzu-Li (Gordon) Tai updated FLINK-28303:
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Fix Version/s: kafka-3.0.1
kafka-3.1.0
> Kafka SQL Connector loses data when restoring from a savepoint with a topic
> with empty partitions
> -------------------------------------------------------------------------------------------------
>
> Key: FLINK-28303
> URL: https://issues.apache.org/jira/browse/FLINK-28303
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: 1.14.4
> Reporter: Robert Metzger
> Priority: Blocker
> Labels: pull-request-available
> Fix For: kafka-3.0.1, kafka-3.1.0
>
>
> Steps to reproduce:
> - Set up a Kafka topic with 10 partitions
> - produce records 0-9 into the topic
> - take a savepoint and stop the job
> - produce records 10-19 into the topic
> - restore the job from the savepoint.
> The job will be missing usually 2-4 records from 10-19.
> My assumption is that if a partition never had data (which is likely with 10
> partitions and 10 records), the savepoint will only contain offsets for
> partitions with data.
> While the job was offline (and we've written record 10-19 into the topic),
> all partitions got filled. Now, when Kafka comes online again, it will use
> the "latest" offset for those partitions, skipping some data.
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