cserwen commented on code in PR #4523:
URL: https://github.com/apache/rocketmq/pull/4523#discussion_r911564678
##########
namesrv/src/main/java/org/apache/rocketmq/namesrv/processor/DefaultRequestProcessor.java:
##########
@@ -240,6 +240,13 @@ public RemotingCommand
registerBrokerWithFilterServer(ChannelHandlerContext ctx,
registerBrokerBody.getFilterServerList(),
ctx.channel());
+ if (result == null) {
Review Comment:
```java
if (topicConfigWrapper.getTopicConfigTable().size() == 1) {
log.warn("Can't register topicConfigWrapper={} because broker={} has not
registered.", topicConfigWrapper, brokerName);
return null;
}
```
`null` is returned directly. @Oliverwqcwrw
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