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https://issues.apache.org/jira/browse/FLINK-11249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16732813#comment-16732813
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Aljoscha Krettek commented on FLINK-11249:
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[~yanghua] The solution that Piotr already mentioned is the correct one: All
state should be serialized using a custom-written {{TypeSerializer}}, not via
Java serialization. The class itself already has examples of where we user a
{{TypeSerializer}} for state.
> FlinkKafkaProducer011 can not be migrated to FlinkKafkaProducer
> ---------------------------------------------------------------
>
> Key: FLINK-11249
> URL: https://issues.apache.org/jira/browse/FLINK-11249
> Project: Flink
> Issue Type: Sub-task
> Components: Kafka Connector
> Affects Versions: 1.7.0, 1.7.1
> Reporter: Piotr Nowojski
> Assignee: vinoyang
> Priority: Blocker
> Fix For: 1.7.2, 1.8.0
>
>
> As reported by a user on the mailing list "How to migrate Kafka Producer ?"
> (on 18th December 2018), {{FlinkKafkaProducer011}} can not be migrated to
> {{FlinkKafkaProducer}} and the same problem can occur in the future Kafka
> producer versions/refactorings.
> The issue is that {{ListState<FlinkKafkaProducer.NextTransactionalIdHint>
> FlinkKafkaProducer#nextTransactionalIdHintState}} field is serialized using
> java serializers and this is causing problems/collisions on
> {{FlinkKafkaProducer011.NextTransactionalIdHint}} vs
> {{FlinkKafkaProducer.NextTransactionalIdHint}}.
> To fix that we probably need to release new versions of those classes, that
> will rewrite/upgrade this state field to a new one, that doesn't relay on
> java serialization. After this, we could drop the support for the old field
> and that in turn will allow users to upgrade from 0.11 connector to the
> universal one.
> One bright side is that technically speaking our {{FlinkKafkaProducer011}}
> has the same compatibility matrix as the universal one (it's also forward &
> backward compatible with the same Kafka versions), so for the time being
> users can stick to {{FlinkKafkaProducer011}}.
> FYI [~tzulitai] [~yanghua]
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