rabbittmq 出现NullPointerException at org.springframework.amqp.rabbit.core.RabbitTemplate.onMessage

rabbitmq 跟spring整合测试的时候出现了空指针异常，
异常日志：

2018-01-14 23:07:23  [ SimpleAsyncTaskExecutor-1:3769 ] - [ WARN ]  Execution of Rabbit message listener failed.
org.springframework.amqp.rabbit.listener.ListenerExecutionFailedException: Listener threw exception
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.wrapToListenerExecutionFailedExceptionIfNeeded(AbstractMessageListenerContainer.java:758)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:653)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:576)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:78)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:161)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1177)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:559)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:950)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:934)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$600(SimpleMessageListenerContainer.java:78)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1045)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at java.lang.String.<init>(String.java:491)
    at org.springframework.amqp.rabbit.core.RabbitTemplate.onMessage(RabbitTemplate.java:1039)
    at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.onMessage(MessageListenerAdapter.java:357)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:650)
    ... 10 more
2018-01-14 23:07:23  [ SimpleAsyncTaskExecutor-1:3769 ] - [ DEBUG ]  Rejecting messages (requeue=true)

问题：队列没有找到消费者，导致消息重新入队列，然后再发，再被拒绝，再发。。。就会一直打印如上的错误日志。
案例：

如上图所示在我的配置里，queue：queueCheng它绑定的消费者是amqpTemplate2，但是在配置文件里面没有配置有amqpTemplate2的类。
正确配置如下图：