What is the difference between RocketMQ error system busy and broker busy

[smallemployees]

Before Creating the Bug Report

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

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

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

Runtime platform environment

Linux node89 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

RocketMQ version

4.6.0

JDK Version

1.8

Describe the Bug

What is the difference between RocketMQ error system busy and broker busy

Steps to Reproduce

What is the difference between RocketMQ error system busy and broker busy

What Did You Expect to See?

What is the difference between RocketMQ error system busy and broker busy

What Did You See Instead?

What is the difference between RocketMQ error system busy and broker busy

Additional Context

No response