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

OS: Centos7.6

RocketMQ version

5.3.2

JDK Version

1.8

Describe the Bug

RocketMQ 5.3.2 在 Proxy 模式下，如果 gRPC Client 使用 IPv6 地址连接 Proxy，发送消息时 Broker 会抛出 NullPointerException，导致消息发送失败。

经过排查发现，该问题仅在 IPv6 环境下出现，IPv4 环境一切正常。

Steps to Reproduce

为了定位问题，我在 Proxy 中增加了一些日志。

gRPC Metadata 中记录的客户端地址如下：

REMOTE_ADDRESS = [240e:341:6246:c700:c4ad:e645:459e:2]:44880
LOCAL_ADDRESS = [240e:341:6246:c700:c4ad:e645:459e:2]:8081

随后 ProxyContext 中保存的地址也是：

ProxyContext remote = [240e:341:6246:c700:c4ad:e645:459e:2]:44880

发送消息时：

ctx.remoteAddress = [240e:341:6246:c700:c4ad:e645:459e:2]:44880

说明 gRPC Metadata 在整个 Proxy 内部传递过程中没有发生变化。

What Did You Expect to See?

RocketMQ Version：5.3.2
部署方式：Proxy + Broker + NameServer
Client：rocketmq-clients-go
网络环境：IPv6
我期望发送消息返回正常信息

What Did You See Instead?

发送消息后，有异常
java.lang.NullPointerException: Cannot invoke "java.net.InetSocketAddress.getAddress()" because "bornSocketAddress" is null
at org.apache.rocketmq.store.CommitLog.asyncPutMessage(CommitLog.java:945)
at org.apache.rocketmq.store.DefaultMessageStore.asyncPutMessage(DefaultMessageStore.java:602)
at org.apache.rocketmq.broker.processor.SendMessageProcessor.sendMessage(SendMessageProcessor.java:328)
...

Additional Context

最终定位到：
org.apache.rocketmq.common.utils.NetworkUtil
public static SocketAddress string2SocketAddress(final String addr) {
int split = addr.lastIndexOf(":");
String host = addr.substring(0, split);
String port = addr.substring(split + 1);
return new InetSocketAddress(host, Integer.parseInt(port));
}
Proxy 将 gRPC Metadata 中的
[240e:341:6246:c700:c4ad:e645:459e:2]:44880
转换为：
new InetSocketAddress(
"[240e:341:6246:c700:c4ad:e645:459e:2]",
44880
)
随后：ctx.channel().remoteAddress()
最终成为：InetSocketAddress
但是其中：inetSocketAddress.getAddress()
返回为：null
最终在 CommitLog 中：bornSocketAddress.getAddress()
触发 NullPointerException。