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