kbac001 opened a new issue, #15446:
URL: https://github.com/apache/dubbo/issues/15446

   ### Pre-check
   
   - [x] I am sure that all the content I provide is in English.
   
   
   ### Search before asking
   
   - [x] I had searched in the 
[issues](https://github.com/apache/dubbo/issues?q=is%3Aissue) and found no 
similar issues.
   
   
   ### Apache Dubbo Component
   
   Java Samples (apache/dubbo-samples)
   
   ### Dubbo Version
   
   Dubbo 3.3.4, SpringBoot 2.7.18, Corretto 1.8.0_452
   
   ### Steps to reproduce this issue
   
   Modify the samples code: 
   ```[java]
   /**
    * stub-consumer/StubConsumer
    * /
       @DubboReference(check=false,
               stub="org.apache.dubbo.samples.stub.DemoServiceStub",
               onconnect = "print",
               interfaceName = "org.apache.dubbo.samples.stub.DemoService")
       private DemoService demoService;
   
   ```
   ```[stub-interface]
   /**
    * stub-interface/DemoServiceStub
    * /
   
       public void print() {
           logger.info("onconnect.");
       }
   
   ```
   then start zk, provider, consumer. and consumer print error log:
   ```
   17:25:50.205 |-ERROR [main] pc.proxy.wrapper.StubProxyFactoryWrapper:    -|  
[DUBBO] export a stub service error., dubbo version: 3.3.4, current host: 
192.168.31.200, error code: 3-2. This may be caused by , go to 
https://dubbo.apache.org/faq/3/2 to find instructions. 
   java.lang.IllegalStateException: No such extension 
org.apache.dubbo.rpc.Protocol by name consumer, no related exception was found, 
please check whether related SPI module is missing.
        at 
org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:768)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:775)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:575)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:549)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) 
~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.rpc.proxy.wrapper.StubProxyFactoryWrapper.export(StubProxyFactoryWrapper.java:139)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.rpc.proxy.wrapper.StubProxyFactoryWrapper.getProxy(StubProxyFactoryWrapper.java:99)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.rpc.ProxyFactory$Adaptive.getProxy(ProxyFactory$Adaptive.java) 
~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:522) 
~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:383) 
~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:244) 
~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.utils.SimpleReferenceCache.get(SimpleReferenceCache.java:140)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.deploy.DefaultModuleDeployer.lambda$referServices$6(DefaultModuleDeployer.java:567)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4705)
 ~[?:1.8.0_452]
        at 
org.apache.dubbo.config.deploy.DefaultModuleDeployer.referServices(DefaultModuleDeployer.java:539)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.deploy.DefaultModuleDeployer.startSync(DefaultModuleDeployer.java:186)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:159)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextRefreshedEvent(DubboDeployApplicationListener.java:167)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:153)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:52)
 ~[dubbo-3.3.4.jar:3.3.4]
        at 
org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:178)
 ~[spring-context-5.3.31.jar:5.3.31]
        at 
org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:171)
 ~[spring-context-5.3.31.jar:5.3.31]
        at 
org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:145)
 ~[spring-context-5.3.31.jar:5.3.31]
        at 
org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:429)
 ~[spring-context-5.3.31.jar:5.3.31]
        at 
org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:386)
 ~[spring-context-5.3.31.jar:5.3.31]
        at 
org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:949)
 ~[spring-context-5.3.31.jar:5.3.31]
        at 
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:594)
 ~[spring-context-5.3.31.jar:5.3.31]
        at 
org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) 
~[spring-boot-2.7.18.jar:2.7.18]
        at 
org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:409)
 ~[spring-boot-2.7.18.jar:2.7.18]
        at 
org.springframework.boot.SpringApplication.run(SpringApplication.java:308) 
~[spring-boot-2.7.18.jar:2.7.18]
        at 
org.springframework.boot.SpringApplication.run(SpringApplication.java:1300) 
~[spring-boot-2.7.18.jar:2.7.18]
        at 
org.springframework.boot.SpringApplication.run(SpringApplication.java:1289) 
~[spring-boot-2.7.18.jar:2.7.18]
        at 
org.apache.dubbo.samples.stub.consumer.StubConsumer.main(StubConsumer.java:44) 
~[classes/:?]
   
   ```
   
   
   ### What you expected to happen
   
   Consumer can work normally
   
   ### Anything else
   
   _No response_
   
   ### Are you willing to submit a pull request to fix on your own?
   
   - [ ] Yes I am willing to submit a pull request on my own!
   
   ### Code of Conduct
   
   - [x] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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