以前当我使用 RC2 时，我观察到每个 kafka 消费者似乎都在自己的线程中执行（在本例中为pool-6-thread-1）：
2016-05-13 12:13:14 pool-6-thread-1 DEBUG KafkaMessageChannelBinder$ReceivingHandler:115 - org.springframework.cloud.stream.binder.kafka.KafkaMessageChannelBinder$ReceivingHandler@2b461688 received message: GenericMessage [payload=byte[400], headers={kafka_offset=17, kafka_messageKey=null, kafka_topic=redeemed, kafka_partitionId=0, kafka_nextOffset=18}] - {}
但是在升级到 1.0.0RELEASE 之后，似乎同一个线程（kafka-binder-）被用于所有消费，无论设置concurrency属性如何：
2016-05-17 14:14:18 kafka-binder- DEBUG KafkaMessageChannelBinder$ReceivingHandler:115 - org.springframework.cloud.stream.binder.kafka.KafkaMessageChannelBinder$ReceivingHandler@5044f552 received message: GenericMessage [payload=byte[287], headers={kafka_offset=62, kafka_messageKey=null, kafka_topic=error.redeemed.poc, kafka_partitionId=0, kafka_nextOffset=63}] - {}
这是新的默认行为吗？如何配置我的应用程序以利用 MessageChannelBinders 池，每个池在各自的线程中执行？