gaoyf opened a new issue, #10168: URL: https://github.com/apache/rocketmq/issues/10168
### 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 OS: Ubuntu 22.04 ### RocketMQ version 5.4.0 ### JDK Version Open Jdk 8 ### Describe the Bug GetAllTopicConfigResponseHeader‘s field totalTopicNum should not add annotation: @CFNotNull. ### Steps to Reproduce When I update the broker cluster with old master(version 5.3.1) and new slave(version 5.4.0)，the slave can not sync topic from master as for the bellowing exception: ``` 2026-03-16 16:24:45 ERROR BrokerControllerScheduledThread1 - Failed field [totalTopicNum] decoding org.apache.rocketmq.remoting.exception.RemotingCommandException: the custom field <totalTopicNum> is null at org.apache.rocketmq.remoting.protocol.RemotingCommand.decodeCommandCustomHeaderDirectly(RemotingCommand.java:307) at org.apache.rocketmq.remoting.protocol.RemotingCommand.decodeCommandCustomHeader(RemotingCommand.java:275) at org.apache.rocketmq.remoting.protocol.RemotingCommand.decodeCommandCustomHeader(RemotingCommand.java:267) at org.apache.rocketmq.broker.out.BrokerOuterAPI.getAllTopicConfig(BrokerOuterAPI.java:802) at org.apache.rocketmq.broker.slave.SlaveSynchronize.syncTopicConfig(SlaveSynchronize.java:86) at org.apache.rocketmq.broker.slave.SlaveSynchronize.syncAll(SlaveSynchronize.java:68) at org.apache.rocketmq.broker.BrokerController$10.run(BrokerController.java:773) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) ``` ### What Did You Expect to See? No exception. ### What Did You See Instead? Exception. ### 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]
