[jira] [Assigned] (FLINK-37583) Upgrade Kafka Client version to 4.0.0

["Fabian Paul (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-37583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabian Paul reassigned FLINK-37583:
-----------------------------------

    Assignee: Thomas Cooper

> Upgrade Kafka Client version to 4.0.0
> -------------------------------------
>
>                 Key: FLINK-37583
>                 URL: https://issues.apache.org/jira/browse/FLINK-37583
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: Thomas Cooper
>            Assignee: Thomas Cooper
>            Priority: Major
>              Labels: pull-request-available
>
> Kafka Client version 4.0.0 has been released. This has many performance improvements and security fixes so we should upgrade the flink-connector-kafka to use this version. 
> It is backwards compatible with older Kafka versions, however as noted in the [release notes|https://kafka.apache.org/40/documentation.html#upgrade_servers_400_notable]:
> {quote}
> Old protocol API versions have been removed. Users should ensure brokers are version 2.1 or higher before upgrading Java clients (including Connect and Kafka Streams which use the clients internally) to 4.0.
> {quote}
> Therefore, moving to this version will mean that the connector cannot be used with Kafka version 2.0 or older. Hopefully, users have upgraded beyond this point by now but it will need to be stated clearly.



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