We should first identify whether the user has configured it and then set it up, otherwise the user will not be able to choose another serialization protocol.

[leizhiyuan]

https://github.com/apache/rocketmq/blob/develop/example/src/main/java/org/apache/rocketmq/example/benchmark/Consumer.java#L54

We should first identify whether the user has configured it and then set it up, otherwise the user will not be able to choose another serialization protocol.

Also, for POP, there will be problems with using RocketMQ serialization here, because the requestcode will be converted from int to short, resulting in