Why rocketmq5 not support send batch message

[zsh9527]

pageckage: org.apache.rocketmq:rocketmq-client:5.3.1
api: org.apache.rocketmq.client.producer.DefaultMQProducer#send(java.util.Collection<org.apache.rocketmq.common.message.Message>)
topic type: normal
send error code: VERSION_NOT_SUPPORTED
send error message: Request doesn't have field bname

saved this api， but not support

[francisoliverlee]

old client. try this one

<dependency>
    <groupId>org.apache.rocketmq</groupId>
    <artifactId>rocketmq-client</artifactId>
    <version>5.3.1</version>
</dependency>

you can check client code, not support without codes in-red-frame

[zsh9527]

I use this version of the client, and queried the server source code.
org.apache.rocketmq. Proxy. removing.activity.AbstractRemotingActivity# BatchMessage_Code not equlas BROKER_NAME_FIELD_FOR_SEND_MESSAGE_V2 is marked as an old version request header, so this is a buy?
rocketmq server version: 5.3.1

[zsh9527]

I connect to rocketmq proxy. I test connect to rocketmq nameserver it work

[lizhimins]

The feature to support batch sending is currently unavailable(5.3.3), but it is in the planning stages.

[lizhimins]

@qianye1001 Please pay attention to this issue