GO and JAVA cannot communicate with each other due to case issues

[ssfyn]

Environment

• Server: go: v3.1.0 or v3.1.1-rc1, java: 3.17
• Client: go: v3.1.0 or v3.1.1-rc1, java: 3.17
• Protocol: triple
• Registry: zookeeper (go: interface, java: service+interface)

Issue description

Should the rpc method in the proto file be defined as PascalCase or camelCase?
No matter which one, go and java are currently unable to communicate with each other.

rpc method using PascalCase:

// The greeting service definition.
service GreeterService {
  // Sends a greeting
  rpc Greet(HelloRequest) returns (HelloResponse) {}
}

// The request message containing the user's name.
message HelloRequest {
  string name = 1;
}

// The response message containing the greetings
message HelloResponse {
  string message = 1;
}

result: java client convert method name to camelCase

client	server	result
go	go	Success
go	java	Success
java	java	java client: throw exception UNIMPLEMENTED : Method : greet not found of service:com.example.triple.service.GreeterService, maybe because java server return status is UNIMPLEMENTED(12)
java	go	go server: return error cannot find method [greet] of service [com.example.GreeterService] in dubbo

rpc method using camelCase (not followed protobuf style guid):

// The greeting service definition.
service GreeterService {
  // Sends a greeting
  rpc greet(HelloRequest) returns (HelloResponse) {}
}

// The request message containing the user's name.
message HelloRequest {
  string name = 1;
}

// The response message containing the greetings
message HelloResponse {
  string message = 1;
}

result: go server convert method name to PascalCase, but serviceInfo still camelCase

client	server	result
go	go	go server: throw error: unknown method Greet for service com.example.GreeterService
go	java	Success
java	java	Success
java	go	go server: throw error: unknown method Greet for service com.example.GreeterService

[FoghostCn]

PascalCase should be used, in java side PascalCase and camelCase always generate camelCase method name , but in go side currently method name is same with proto defined name

update: go 3.1.x is always PascalCase，3.2 will be PascalCase also #2570

[ssfyn]

PascalCase should be used, in java side PascalCase and camelCase always generate camelCase method name , but in go side currently method name is same with proto defined name

If you use PascalCase, an error will occur when java calls java or go services through the triple protocol.
Maybe it's because the java client converts the method name to camelCase during the transmission process.

java server return: UNIMPLEMENTED : Method : greet not found of service:com.example.triple.service.GreeterService
go server return: cannot find method [greet] of service [com.example.GreeterService] in dubbo

[FoghostCn]

please create a demo project to reproduce, java client call java server is a basic usage,I'm confused how it happen

[ssfyn]

please create a demo project to reproduce, java client call java server is a basic usage,I'm confused how it happen

see this example

Is spring proxy problem, the @DubboReference default proxy use java service reflect assemble url.
When I add proxy = CommonConstants.NATIVE_STUB parameter, I can call it.
It is recommended to add some explanation in the examples or documentation.

[FoghostCn]

I still can't reproduce you problem, but if you think the proxy parameter not work as you expect you can open an issue in the dubbo java project