shirenchuang opened a new issue, #7400: URL: https://github.com/apache/rocketmq/issues/7400
### Before Creating the Bug Report - [X] I found a bug, not just asking a question, which should be created in [GitHub Discussions](https://github.com/apache/rocketmq/discussions). - [X] I have searched the [GitHub Issues](https://github.com/apache/rocketmq/issues) and [GitHub Discussions](https://github.com/apache/rocketmq/discussions) of this repository and believe that this is not a duplicate. - [X] I have confirmed that this bug belongs to the current repository, not other repositories of RocketMQ. ### Runtime platform environment MacOs 12 ### RocketMQ version 5.1.3 ### JDK Version jdk 8 ### Describe the Bug ```bash sh bin/mqadmin getBrokerEpoch -n 127.0.0.1:9876 -c szz_cluster_a ```   ### Steps to Reproduce  this one cmd only for Controller mode ### What Did You Expect to See? I think we can remind the user before the client initiates a request that this can only be used in Controller Mode. 我觉得可以在客户端发起请求之前就提醒用户这个只能在Controller Mode下才能使用 ### What Did You See Instead? . ### Additional Context _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
