Kafka Streams (4.2) added native DLQ support via KIP-1034. All three exception handlers (DeserializationExceptionHandler, ProcessingExceptionHandler, ProductionExceptionHandler) gained a handleError() method that returns a Response containing a result (RESUME/FAIL) and an optional list of DLQ ProducerRecords. The DLQ topic is configured via errors.dead.letter.queue.topic.name.

Spring Kafka's RecoveringDeserializationExceptionHandler already implements handleError() but bypasses the native DLQ — it returns Response.resume() with no DLQ records and instead routes failures through DeadLetterPublishingRecoverer + KafkaTemplate.

Changes needed:

• Expose the native DLQ topic configuration on StreamsBuilderFactoryBean
• Consider providing Spring-friendly equivalents of RecoveringDeserializationExceptionHandler for the processing and production exception handler types