[Bug] MessageBatch Custom Attribute Value Lost

[Sunw730]

Before Creating the Bug Report

• I found a bug, not just asking a question, which should be created in GitHub Discussions.

• I have searched the GitHub Issues and GitHub Discussions of this repository and believe that this is not a duplicate.

• I have confirmed that this bug belongs to the current repository, not other repositories of RocketMQ.

Runtime platform environment

生产端：Windows11
消费端：Windows11
服务端：CentOS Linux 7 (Core)

RocketMQ version

生产端/消费端：org.apache.rocketmq:rocketmq-client:4.7.1
服务端：rocketmq server 4.7.1

JDK Version

OpenJDK：zulu-11

Describe the Bug

生产端发送批量消息 MessageBatch 时，通过 putUserProperty 方法设置了属性值（内部的 List 都设置了相同的属性值），
消费端接收到的消息中没有获取到自定义的属性值。

Steps to Reproduce

1. 生产端：

// step 1
messageBatch.putUserProperty("name", "value");
messageBatch.forEach(message -> message.putUserProperty("name", "value"));
producer.send(messageBatch);

2. 消费端：

consumer.registerMessageListener((MessageListenerConcurrently) (messages, context) -> {
    messages.forEach(message -> {
        // step 2
        System.out.println(message.getUserProperty("name"));
    });
});

What Did You Expect to See?

我希望 step 2 能输出字符串 value

What Did You See Instead?

目前 step 2 处实际输出的是 null

Additional Context

No response

[yx9o]

嗨，我没有复现你说的场景，方便发下完整的生产消费代码吗？或者你可以调试下，确认下发送时props里是否包含设置的属性。

[RongtongJin]

这个好像有修复，你可以用最新的5.x或者4.x版本试试吗？