THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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also blocking the underline IO thread in bRPC. So that we should use the following way. PUT the request into a pthread thread pool and do the work in pthread like line 225.
5. Do Not Do Heavy Work in Deconstructor and Not Do Deconstructor Work in Close method
For example, if we do some close work in deconstructor, the dependend parent raw ptr may be released. it will core.