[Bug] java.lang.ClassCastException: org.apache.dubbo.samples.proto.GreetResponse cannot be cast to java.util.concurrent.CompletableFuture

[FoghostCn]

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ref: https://github.com/apache/dubbo/discussions/13914

Apache Dubbo Component

Java SDK (apache/dubbo)

Dubbo Version

Dubbo java: 3.2.11 Jdk: 1.8 OS: macos 14.2.1

Steps to reproduce this issue

when use async method in java client and go server application level service discovery

1. start the nacos server
2. start the go-server:go run server.go
3. start the java-client:

CompletableFuture<GreetResponse> future = greetService.greetAsync(req);
GreetResponse greet = future.get();

Exception in thread "main" java.lang.ClassCastException: org.apache.dubbo.samples.proto.GreetResponse cannot be cast to java.util.concurrent.CompletableFuture
	at org.apache.dubbo.samples.proto.DubboGreetServiceTriple$GreetServiceStub.greetAsync(DubboGreetServiceTriple.java:117)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.dubbo.config.spring.util.LazyTargetInvocationHandler.invoke(LazyTargetInvocationHandler.java:54)
	at org.apache.dubbo.samples.proto.GreetServiceDubboProxy0.greetAsync(GreetServiceDubboProxy0.java)
	at org.apache.dubbo.samples.Main.main(Main.java:26)

code is at: https://github.com/FoghostCn/dubbo-go-samples/blob/async-bug/service_discovery/service/java-client/src/main/java/org/apache/dubbo/samples/Main.java

What you expected to happen

async method invoke success

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• [X] Yes I am willing to submit a pull request on my own!

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