Search before asking

• I had searched in the issues and found no similar issues.

Read the unit testing guidelines

• I have read.

Unit test request

As a result of the refactoring of #4768, all of the unit test classes no longer work and need to be rewritten using Netty.

Describe the unit tests you want to do

Module name: eventmesh-runtime
Located at: org.apache.eventmesh.runtime.admin.handler
Task status: ×(unfinished)

Are you willing to submit PR?

• Yes I am willing to submit a PR!