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https://issues.apache.org/jira/browse/KAFKA-8828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16915317#comment-16915317
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Matthias J. Sax commented on KAFKA-8828:
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Can you elaborate? Since 2.3, `GlobalKTable` use timestamped stores. However, 
manually added global stores should not be affected. However, if you add a 
`GlobalKTable` you don't need to write any code and you would never need to 
access the `ProcessorContext`. What are you exactly trying to do? The change of 
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-258%3A+Allow+to+Store+Record+Timestamps+in+RocksDB]
 should be backward compatible.

> [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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