address comments

Author: lucasbru

clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java

@@ -1500,7 +1500,7 @@ private void runRebalanceCallbacksOnClose() {
 
         int memberEpoch = groupMetadata.get().get().generationId();
 
-        final Exception error;
+        Exception error = null;
 
         if (streamsRebalanceListenerInvoker != null && streamsRebalanceListenerInvoker.isPresent()) {