Springboot integrates rocketmq to create a topic and send a message to this topic No route info of this topic

An error will be reported during testing:

com.alibaba.rocketmq.client.exception.MQClientException: No route info of this topic, TopicTest1
See http://docs.aliyun.com/cn#/pub/ons/faq/exceptions&topic_not_exist for further details.
    at com.alibaba.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendDefaultImpl(DefaultMQProducerImpl.java:542)
    at com.alibaba.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:1030)
    at com.alibaba.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:989)
    at com.alibaba.rocketmq.client.producer.DefaultMQProducer.send(DefaultMQProducer.java:90)
    at com.yang.rocketmq.Producer.main(Producer.java:45)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

solution

DefaultMQProducer producer = new DefaultMQProducer("please_rename_unidcque_group_name");
//设置自动创建topic的key值
producer.setCreateTopicKey("AUTO_CREATE_TOPIC_KEY");

//Set the key value of the automatically created topic
producer.setCreateTopicKey("AUTO_CREATE_TOPIC_KEY");
this step is very important

Don't forget the water carrier reference link

Persistence or non-persistence in this life is not terrible. What I am afraid of is walking on the road of persistence alone! ! !