tvielgouarin edited a comment on issue #7405: [FLINK-11249] FlinkKafkaProducer011 can not be migrated to FlinkKafkaProducer URL: https://github.com/apache/flink/pull/7405#issuecomment-456391275 hi @pnowojski , @yanghua , I come from @cjolif 's team and I am currently working on the implementation of the Migration test in order to accelerate the merge of this PR. I came here with several questions in mind. I do understand that it needs to implement: - migration tests of `FlinkKafkaProducer011` between Flink versions - migration test from `FlinkKafkaProducer011` to universal `FlinkKafkaProducer` But for migration tests of universal `FlinkKafkaProducer` between Flink versions : I read in the doc that this connector is supported since flink 1.7 . So currently, no migration test should be passing ? Also, do we just want to check that the connector can start from a previous version checkpoint ? Furthermore I've worked on a simple implementation of Migration test for `FlinkKafkaProducer`: https://github.com/tvielgouarin/flink/commit/973756430c226a0cd5011fedc1eab1345a27cc2a Most of the time the test fail with `The producer attempted to use a producer id which is not currently assigned to its transactional id`. I'm not sure, but I guess it's because there is a different KafkaServer's instance between the snapshot version and the test, and the transactional Id assignations are lost (?). If so, do you have and idea of the the best work around ? Anyway if you can have a look at what I've done and criticize it, it would be much appreciated.
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