wcarlson5 commented on code in PR #15414:
URL: https://github.com/apache/kafka/pull/15414#discussion_r1528807717


##########
streams/src/main/java/org/apache/kafka/streams/processor/internals/RecordDeserializer.java:
##########
@@ -68,40 +68,49 @@ ConsumerRecord<Object, Object> deserialize(final 
ProcessorContext<?, ?> processo
                 Optional.empty()
             );
         } catch (final Exception deserializationException) {
-            final 
DeserializationExceptionHandler.DeserializationHandlerResponse response;
-            try {
-                response = deserializationExceptionHandler.handle(
-                    (InternalProcessorContext<?, ?>) processorContext,
-                    rawRecord,
-                    deserializationException);
-            } catch (final Exception fatalUserException) {
-                log.error(
-                    "Deserialization error callback failed after 
deserialization error for record {}",
-                    rawRecord,
-                    deserializationException);
-                throw new StreamsException("Fatal user code error in 
deserialization error callback", fatalUserException);
-            }
+            handleDeserializationFailure(deserializationExceptionHandler, 
processorContext, deserializationException, rawRecord, log, 
droppedRecordsSensor);
+            return null;

Review Comment:
   yeah we can add a note



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