dubbo3.0.5如何使用stubevent?

[xxxcrel]

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我在@DubboReference注解中看到有一项stubevent配置, 并尝试设置为true, @DubboReference(onconnect = "onConnect", stubevent = true, stub = "DemoServiceLocal")
我的本地存根类如下:

package org.apache.dubbo.demo.consumer;

import org.apache.dubbo.demo.DemoService;

public class DemoServiceLocal implements DemoService {

    private DemoService demoService;
    public DemoServiceLocal(DemoService demoService){
        this.demoService = demoService;
    }
    @Override
    public String sayHello(String name) {
        return demoService.sayHello(name);
    }
    
    public void onConnect(){
        System.out.println("DemoServiceLocal.onConnect()");
    }
}

按照Provider端的onconnect, ondisconnect事件通知理解, 在Consumer端的存根也支持onconnect, ondisconnect事件
但是Consumer端抛出如下异常:

13:00:59.150 [main] ERROR org.apache.dubbo.rpc.proxy.wrapper.StubProxyFactoryWrapper -  [DUBBO] export a stub service error., dubbo version: 3.0.5, current host: 192.168.40.120
java.lang.NullPointerException: null
	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
	at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37)
	at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51)
	at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:75)
	at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:71)
	at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.export(DubboProtocol.java:296)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:66)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:76)
	at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:61)
	at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.export(ProtocolSerializationWrapper.java:47)
	at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java)
	at org.apache.dubbo.rpc.proxy.wrapper.StubProxyFactoryWrapper.export(StubProxyFactoryWrapper.java:123)
	at org.apache.dubbo.rpc.proxy.wrapper.StubProxyFactoryWrapper.getProxy(StubProxyFactoryWrapper.java:93)
	at org.apache.dubbo.rpc.ProxyFactory$Adaptive.getProxy(ProxyFactory$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:400)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:275)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:216)
	at org.apache.dubbo.config.utils.SimpleReferenceCache.get(SimpleReferenceCache.java:110)
	at org.apache.dubbo.config.deploy.DefaultModuleDeployer.lambda$referServices$6(DefaultModuleDeployer.java:384)
	at java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4707)
	at org.apache.dubbo.config.deploy.DefaultModuleDeployer.referServices(DefaultModuleDeployer.java:364)
	at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:151)
	at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.startModules(DefaultApplicationDeployer.java:617)
	at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.doStart(DefaultApplicationDeployer.java:581)
	at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.start(DefaultApplicationDeployer.java:554)
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.start(DubboBootstrap.java:222)
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.start(DubboBootstrap.java:212)

[BurningCN]

@DubboReference里的stub值要类的权限定名 class.getName()