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https://issues.apache.org/jira/browse/KAFKA-8828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16918840#comment-16918840
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Adam Rinehart commented on KAFKA-8828:
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As I had said, I'm new to Kafka Streams and only started using them since 2.3,
so had not fully read the upgrade-guide since I wasn't upgrading. It would have
been useful if this was in the javadoc, but I won't argue that it wasn't
documented.
Either way, this discussion has been helpful on increasing my understanding of
KTables and GlobalKTables and I appreciate it. I'll leave it up to Marcos, the
original poster, if he is satisfied but personally, I understand now.
> [BC Break] Global store returns a TimestampedKeyValueStore in 2.3
> -----------------------------------------------------------------
>
> Key: KAFKA-8828
> URL: https://issues.apache.org/jira/browse/KAFKA-8828
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.3.0
> Reporter: Marcos Passos
> Priority: Major
>
> Since 2.3, {{ProcessorContext}} returns a {{TimestampedKeyValueStore}} for
> global stores, which is backward incompatible. This change makes the upgrade
> path a lot painful and involves creating a non-trivial adapter to hide the
> timestamp-related functionality in cases where it is not needed.
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