[Bug] copy sync.Map will cause the data race in loadbalance

[absolute8511]

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.

Programming Language of the Client

Go

Runtime Platform Environment

Linux

RocketMQ Version of the Client/Server

newest

Run or Compiler Version

golang 1.20

Describe the Bug

copy sync.Map will cause the data race, it may report as below

Steps to Reproduce

running benchmark to send messages for golang and make it sometimes blocked or limited by the server.

What Did You Expect to See?

no panic

What Did You See Instead?

panic as below

Additional Context

No response

[github-actions]

This issue is stale because it has been open for 30 days with no activity. It will be closed in 3 days if no further activity occurs.

[github-actions]

This issue was closed because it has been inactive for 3 days since being marked as stale.