jeffchanjunwei opened a new issue, #4359:
URL: https://github.com/apache/rocketmq/issues/4359

   
   1. Please describe the issue you observed:
   
   
   - What did you see instead?
   
   ```
   Send Failed.
   org.apache.rocketmq.client.exception.MQClientException: No route info of 
this topic, EW_RFLOW_NOTIFY_RESULT
   See http://rocketmq.apache.org/docs/faq/ for further details.
           at 
org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendDefaultImpl(DefaultMQProducerImpl.java:564)
           at 
org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:1069)
           at 
org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:1023)
           at 
org.apache.rocketmq.client.producer.DefaultMQProducer.send(DefaultMQProducer.java:214)
   ```
   
   2. Please tell us about your environment:
   
   nameserver and broker : v4.8.0 & 2 master + 4slave dledger-mode & netty 
version 4.0.42.Final;
   client: v4.2.0 & netty version 4.0.54.Final;
   
   3. Other information (e.g. detailed explanation, logs, related issues, 
suggestions on how to fix, etc):
   
   broker's autoCreateTopic is setted to false. We can see the topic is created 
manual in the two namesrv's log as follow 
   
   ```
   2022-05-18 11:09:58 INFO RemotingExecutorThread_2 - new topic registered, 
EW_RFLOW_NOTIFY_RESULT QueueData [brokerName=broker-b, readQueueNums=8, 
writeQueueNums=8, perm=6, topicSynFlag=0]
   ```
   
   alse in the two broker's log as follow:
   
   ```
   2022-05-18 11:09:57 INFO AdminBrokerThread_15 - create new topic 
[TopicConfig [topicName=EW_RFLOW_NOTIFY_RESULT, readQueueNums=8, 
writeQueueNums=8, perm=RW-, topicFilterType=SINGLE_TAG, topicSysFlag=0, 
order=false]]
   ```
   
   but we cannot find the related log of the producer client group registed to 
the broker and namesrv, and find a lot of other consumer client log as follow :
   
   ```
   2022-05-18 18:48:58 WARN PullMessageThread_8 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   2022-05-18 18:48:58 WARN PullMessageThread_17 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   2022-05-18 18:48:58 WARN PullMessageThread_24 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   2022-05-18 18:48:58 WARN PullMessageThread_3 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   2022-05-18 18:48:58 WARN PullMessageThread_9 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   2022-05-18 18:48:58 WARN PullMessageThread_2 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   2022-05-18 18:48:58 WARN PullMessageThread_7 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   2022-05-18 18:48:58 WARN PullMessageThread_23 - The broker's subscription is 
not latest, group: 
cb-ew-entry|EW_RFLOW_NOTIFY_RESULT|EW_RFLOW_NOTIFY_ENTRY_REFUND|RefundReviewResultListener
 EW_RFLOW_NOTIFY_ENTRY_REFUND
   ```
   
   


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