zrlw opened a new issue #8567:
URL: https://github.com/apache/dubbo/issues/8567
### Environment
* Dubbo version: 2.7.13
* Operating System version: centos7
* Java version: 1.8
* nacos 1.4.2
### Steps to reproduce this issue
一个springboot工程里有两个组件ClientA,
ClientB，分别reference了同一个dubbo服务S，调用S的方法execute分别设置了不同的回调方法：
```
@Component
public class ClientA {
// 回调组件callbackA
@DubboReference( async = true, methods = @Method(name = "execute",
onreturn = "callbackA.onReturn"))
DubboService s;
public void callS(...) {
s.execute(...);
}
}
@Component
public class CallbackA {
public void onReturn(...) {
}
}
@Component
public class ClientB {
// 回调组件callbackB
@DubboReference( async = true, methods = @Method(name = "execute",
onreturn = "callbackB.onReturn"))
DubboService s;
public void callS(...) {
s.execute(...);
}
}
@Component
public class CallbackB {
public void onReturn(...) {
}
}
```
### Expected Result
ClientA调用S的execute方法返回后，回调CallbackA的onReturn，ClientB调用S的execute方法返回后，回调CallbackB的onReturn。
### Actual Result
无论ClientA，还是ClientB，调用S的execute方法后，始终只调用CallbackA或CallbackB中的一个onReturn方法（具体调用哪个貌似和加载顺序有关）。
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