chia7712 commented on PR #18193: URL: https://github.com/apache/kafka/pull/18193#issuecomment-2572283545
> Again: I am not arguing client-broker upgrades, and yes, broker 4.0 require KS 2.1. But we need to keep both compatibility dimensions independent. The notion of a "bridge" version is for client-broker and yes, also applies to KS. But if I am on an older broker, I can still use KS 2.0. I understand. We can include a scenario in the documentation that covers upgrading the client to test the 4.0 broker. My primary concern is to prevent user confusion when selecting the appropriate bridge version. @m1a2st, please consider noting this special case in issue #18091? "If you plan to upgrade your broker to version 4.0, you may need to carefully consider avoiding the use of version 2.0 as a bridge version for your clients. This is because version 2.0 may include protocols that are no longer supported in broker version 4.0." ### conclusion 1. protocol matrix -> 2.1 is base line 2. (client and streams) upgrade path -> [0.11.x - 1.x] -> [2.0 - 3.9] -> 4.x ### follow-up 1. add 2.0 to consumer e2e upgrade test (this PR) 2. remove 0.11, 1.0 and 1.1 from streams e2e upgrade test ( this can be addressed in this PR too) 3. (optional) file a KIP to document the upgrade path (perhaps @brandboat could assist) and involve a wider range of kafka users 4. review issue #18091 to ensure we have comprehensive documentation for both the protocol and upgrade procedures. (Thank you, @m1a2st. @ijuma @mjsax @cadonna @brandboat @m1a2st @ableegoldman WDYT? I believe this is a valuable discussion, as it allows for the establishment of an officially supported compatibility matrix. This matrix will be a valuable resource for users during upgrade. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
