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https://issues.apache.org/jira/browse/KAFKA-12925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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A. Sophie Blee-Goldman updated KAFKA-12925:
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Priority: Critical (was: Major)
> prefixScan missing from intermediate interfaces
> -----------------------------------------------
>
> Key: KAFKA-12925
> URL: https://issues.apache.org/jira/browse/KAFKA-12925
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.8.0
> Reporter: Michael Viamari
> Assignee: Sagar Rao
> Priority: Critical
> Fix For: 3.0.0, 2.8.1
>
>
> [KIP-614|https://cwiki.apache.org/confluence/display/KAFKA/KIP-614%3A+Add+Prefix+Scan+support+for+State+Stores]
> and [KAFKA-10648|https://issues.apache.org/jira/browse/KAFKA-10648]
> introduced support for {{prefixScan}} to StateStores.
> It seems that many of the intermediate {{StateStore}} interfaces are missing
> a definition for {{prefixScan}}, and as such is not accessible in all cases.
> For example, when accessing the state stores through a the processor context,
> the {{KeyValueStoreReadWriteDecorator}} and associated interfaces do not
> define {{prefixScan}} and it falls back to the default implementation in
> {{KeyValueStore}}, which throws {{UnsupportedOperationException}}.
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