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Romain Quinio commented on KAFKA-9109: -------------------------------------- I've faced the same issue when upgrading a library to new PAPI, very annoying. In order to support both old and new APIs, our decorators of org.apache.kafka.streams.processor.api.ProcessorContext must actually implement InternalProcessorContext (by extending org.apache.kafka.streams.processor.internals.ProcessorContextImpl) to workaround the cast... > Get Rid of Cast from ProcessorContext to InternalProcessorContext > ----------------------------------------------------------------- > > Key: KAFKA-9109 > URL: https://issues.apache.org/jira/browse/KAFKA-9109 > Project: Kafka > Issue Type: Improvement > Components: streams > Reporter: Bruno Cadonna > Priority: Major > > The following cast is often used in Kafka Streams code. > {code:java} > public void init(final ProcessorContext context) { > internalProcessorContext = (InternalProcessorContext) context; > ... > } > {code} > This code leads to a {{ClassCastException}} if the implementation of the > {{ProcessorContext}} is not an {{InternalProcessorContext}}, which defeats > the purpose of using interface {{ProcessorContext}} in the API. -- This message was sent by Atlassian Jira (v8.20.10#820010)