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https://issues.apache.org/jira/browse/FLINK-28037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17561261#comment-17561261
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Qingsheng Ren commented on FLINK-28037:
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Thanks for reporting this issue [~Jiangfei Liu] . I think it's a bug in
`ReducingUpsertWriter` that the context wrapper doesn't handle the case without
timestamp correctly. I'll take over the issue.
> Flink SQL Upsert-Kafka can not support Flink1.14.x
> --------------------------------------------------
>
> Key: FLINK-28037
> URL: https://issues.apache.org/jira/browse/FLINK-28037
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: 1.14.4
> Environment: Flink Version: 1.14.0 1.14.2 1.14.3 1.14.4
> Reporter: Jiangfei Liu
> Priority: Major
> Labels: flink-connector-kafka, upser-kafka
> Attachments: kafka-sql.png, kafka-sql2.png
>
>
> in Flink 1.14.x，flink sql upsert-kafka sink can not write data into kafka
> topic with sink buffer flush config，eg
> h5. sink.buffer-flush.max-rows
> h5. sink.buffer-flush.interval
> in Flink1.13.x，flink sql upsert-kafka sink can write data into kafka topic
> with sink buffer lush config
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