[jira] [Commented] (KAFKA-8998) Release Candidate Version 2.3.1-rc1 breaks backward compatibility in PATCH version

["Ismael Juma (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-8998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16947013#comment-16947013 ] 

Ismael Juma commented on KAFKA-8998:
------------------------------------

The request/response classes are not part of the public API. See the javadoc for the public API classes:

[https://kafka.apache.org/23/javadoc/overview-summary.html]

We only provide compatibility guarantees to those classes

> Release Candidate Version 2.3.1-rc1 breaks backward compatibility in PATCH version
> ----------------------------------------------------------------------------------
>
>                 Key: KAFKA-8998
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8998
>             Project: Kafka
>          Issue Type: Bug
>          Components: clients
>    Affects Versions: 2.3.1
>            Reporter: Juan Pablo Correa
>            Priority: Major
>
> The expected type for the `preparedResponse` method in the `MetadataResponse` ([https://github.com/apache/kafka/blob/2.3.1-rc1/clients/src/main/java/org/apache/kafka/common/requests/MetadataResponse.java#L466]) has changed from a `List<Node>` to a `Collection<Node>` from the version 2.3.0 to 2.3.1, this breaks the backward compatibility that one would expect from a PATCH version.



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