<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> I have searched the <a href="https://github.com/apache/dubbo/issues">issues</a> of this repository and believe that this is not a duplicate.</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> I have checked the <a href="https://github.com/apache/dubbo/blob/master/FAQ.md">FAQ</a> of this repository and believe that this is not a duplicate.</li>
</ul>
<h3 dir="auto">Environment</h3>
<ul dir="auto">
<li>Dubbo version: 2.7.4.1</li>
<li>Operating System version: win10</li>
<li>Java version: 1.8</li>
</ul>
<h3 dir="auto">Steps to reproduce this issue</h3>
<ol dir="auto">
<li>create class implements org.apache.dubbo.rpc.Filter</li>
<li>Write setter method on API fields ,  Field on @org.apache.dubbo.config.annotation.Reference</li>
<li>run my app<br>
4.block DubboMetadataServiceProxy#initProxy() in dubboMetadataServiceCache.computeIfAbsent Infinite loop</li>
</ol>
<p dir="auto">Pls. provide [GitHub address] to reproduce this issue.</p>
<h3 dir="auto">Expected Result</h3>
<p dir="auto">What do you expected from the above steps？</p>
<p dir="auto">I want my app to start up properly</p>
<h3 dir="auto">Actual Result</h3>
<p dir="auto">What actually happens?</p>
<p dir="auto">My application cannot be started, stuck in DubboMetadataServiceProxy# initProxy here</p>
<p dir="auto">If there is an exception, please attach the exception trace:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/18204507/75248936-1ef03080-5810-11ea-93f5-51c80e8f8717.png"><img src="https://user-images.githubusercontent.com/18204507/75248936-1ef03080-5810-11ea-93f5-51c80e8f8717.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/18204507/75248763-bdc85d00-580f-11ea-84e2-0a661311ac21.png"><img src="https://user-images.githubusercontent.com/18204507/75248763-bdc85d00-580f-11ea-84e2-0a661311ac21.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/18204507/75248641-8063cf80-580f-11ea-899a-76a25a74214b.png"><img src="https://user-images.githubusercontent.com/18204507/75248641-8063cf80-580f-11ea-899a-76a25a74214b.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/18204507/75248568-5dd1b680-580f-11ea-951f-5c409ddb687f.png"><img src="https://user-images.githubusercontent.com/18204507/75248568-5dd1b680-580f-11ea-951f-5c409ddb687f.png" alt="image" style="max-width: 100%;"></a></p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Just put your stack trace here!

at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1673)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.initProxy(DubboMetadataServiceProxy.java:52)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initDubboMetadataServiceProxy(DubboServiceMetadataRepository.java:647)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$null$4(DubboServiceMetadataRepository.java:625)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$initSubscribedDubboMetadataService$5(DubboServiceMetadataRepository.java:621)
	at java.util.Optional.ifPresent(Optional.java:159)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initSubscribedDubboMetadataService(DubboServiceMetadataRepository.java:620)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initializeMetadata(DubboServiceMetadataRepository.java:292)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$FastClassBySpringCGLIB$$4ef4b7bd.invoke(&lt;generated&gt;)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$EnhancerBySpringCGLIB$$aec22326.initializeMetadata(&lt;generated&gt;)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURL(AbstractSpringCloudRegistry.java:257)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.lambda$doSubscribeDubboServiceURLs$0(AbstractSpringCloudRegistry.java:206)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1082)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:206)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:172)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribe(AbstractSpringCloudRegistry.java:166)
	at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:295)
	at org.apache.dubbo.registry.integration.RegistryDirectory.subscribe(RegistryDirectory.java:172)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:412)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:393)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:69)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:71)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:128)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:396)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:329)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:250)
	at org.apache.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:73)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1818)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1266)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:260)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:227)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1155)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveBean(DefaultListableBeanFactory.java:416)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:349)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:342)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1126)
	at org.apache.dubbo.config.spring.extension.SpringExtensionFactory.getExtension(SpringExtensionFactory.java:94)
	at org.apache.dubbo.common.extension.factory.AdaptiveExtensionFactory.getExtension(AdaptiveExtensionFactory.java:47)
	at org.apache.dubbo.common.extension.ExtensionLoader.injectExtension(ExtensionLoader.java:570)
	at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:532)
	at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:346)
	at org.apache.dubbo.common.extension.ExtensionLoader.getActivateExtension(ExtensionLoader.java:230)
	at org.apache.dubbo.common.extension.ExtensionLoader.getActivateExtension(ExtensionLoader.java:194)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.buildInvokerChain(ProtocolFilterWrapper.java:55)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:130)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.registry.integration.RegistryDirectory.toInvokers(RegistryDirectory.java:423)
	at org.apache.dubbo.registry.integration.RegistryDirectory.refreshInvoker(RegistryDirectory.java:280)
	at org.apache.dubbo.registry.integration.RegistryDirectory.refreshOverrideAndInvoker(RegistryDirectory.java:239)
	at org.apache.dubbo.registry.integration.RegistryDirectory.notify(RegistryDirectory.java:233)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboMetadataServiceURLs(AbstractSpringCloudRegistry.java:352)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribe(AbstractSpringCloudRegistry.java:163)
	at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:295)
	at org.apache.dubbo.registry.integration.RegistryDirectory.subscribe(RegistryDirectory.java:172)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:412)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:393)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:69)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:71)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:128)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:396)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:329)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:250)
	at com.alibaba.cloud.dubbo.service.DubboGenericServiceFactory.create(DubboGenericServiceFactory.java:81)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceInvocationHandler.&lt;init&gt;(DubboMetadataServiceInvocationHandler.java:40)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.newProxy(DubboMetadataServiceProxy.java:92)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.lambda$initProxy$0(DubboMetadataServiceProxy.java:53)
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.initProxy(DubboMetadataServiceProxy.java:52)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initDubboMetadataServiceProxy(DubboServiceMetadataRepository.java:647)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$null$4(DubboServiceMetadataRepository.java:625)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$initSubscribedDubboMetadataService$5(DubboServiceMetadataRepository.java:621)
	at java.util.Optional.ifPresent(Optional.java:159)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initSubscribedDubboMetadataService(DubboServiceMetadataRepository.java:620)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initializeMetadata(DubboServiceMetadataRepository.java:292)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$FastClassBySpringCGLIB$$4ef4b7bd.invoke(&lt;generated&gt;)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$EnhancerBySpringCGLIB$$aec22326.initializeMetadata(&lt;generated&gt;)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURL(AbstractSpringCloudRegistry.java:257)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.lambda$doSubscribeDubboServiceURLs$0(AbstractSpringCloudRegistry.java:206)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1082)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:206)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:172)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribe(AbstractSpringCloudRegistry.java:166)
	at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:295)
	at org.apache.dubbo.registry.integration.RegistryDirectory.subscribe(RegistryDirectory.java:172)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:412)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:393)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:69)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:71)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:128)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:396)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:329)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:250)
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.getOrCreateProxy(ReferenceAnnotationBeanPostProcessor.java:246)
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.doGetInjectedBean(ReferenceAnnotationBeanPostProcessor.java:143)
	at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor.getInjectedObject(AnnotationInjectedBeanPostProcessor.java:359)
	at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor$AnnotatedFieldElement.inject(AnnotationInjectedBeanPostProcessor.java:539)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:116)
	at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor.postProcessPropertyValues(AnnotationInjectedBeanPostProcessor.java:146)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1434)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.resolveBeanReference(ConfigurationClassEnhancer.java:394)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:366)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87.securityUserFilter(&lt;generated&gt;)
	at com.ig.web.quake.conf.WebMvcConfig.securityUserFilterRegistration(WebMvcConfig.java:53)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87.CGLIB$securityUserFilterRegistration$4(&lt;generated&gt;)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87$$FastClassBySpringCGLIB$$aa41d8bb.invoke(&lt;generated&gt;)
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87.securityUserFilterRegistration(&lt;generated&gt;)
	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.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:640)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:475)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:207)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:211)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:202)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.addServletContextInitializerBeans(ServletContextInitializerBeans.java:96)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.&lt;init&gt;(ServletContextInitializerBeans.java:85)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getServletContextInitializerBeans(ServletWebServerApplicationContext.java:253)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.selfInitialize(ServletWebServerApplicationContext.java:227)
	at org.springframework.boot.web.embedded.tomcat.TomcatStarter.onStartup(TomcatStarter.java:53)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5135)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.startup.Tomcat.start(Tomcat.java:459)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:107)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.&lt;init&gt;(TomcatWebServer.java:88)
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:438)
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:191)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:153)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at com.ig.web.quake.IGWebQuakeBootstrap.main(IGWebQuakeBootstrap.java:55)"><pre class="notranslate"><code class="notranslate">Just put your stack trace here!

at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1673)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.initProxy(DubboMetadataServiceProxy.java:52)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initDubboMetadataServiceProxy(DubboServiceMetadataRepository.java:647)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$null$4(DubboServiceMetadataRepository.java:625)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$initSubscribedDubboMetadataService$5(DubboServiceMetadataRepository.java:621)
	at java.util.Optional.ifPresent(Optional.java:159)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initSubscribedDubboMetadataService(DubboServiceMetadataRepository.java:620)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initializeMetadata(DubboServiceMetadataRepository.java:292)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$FastClassBySpringCGLIB$$4ef4b7bd.invoke(&lt;generated&gt;)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$EnhancerBySpringCGLIB$$aec22326.initializeMetadata(&lt;generated&gt;)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURL(AbstractSpringCloudRegistry.java:257)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.lambda$doSubscribeDubboServiceURLs$0(AbstractSpringCloudRegistry.java:206)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1082)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:206)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:172)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribe(AbstractSpringCloudRegistry.java:166)
	at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:295)
	at org.apache.dubbo.registry.integration.RegistryDirectory.subscribe(RegistryDirectory.java:172)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:412)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:393)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:69)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:71)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:128)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:396)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:329)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:250)
	at org.apache.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:73)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1818)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1266)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:260)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:227)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1155)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveBean(DefaultListableBeanFactory.java:416)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:349)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:342)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1126)
	at org.apache.dubbo.config.spring.extension.SpringExtensionFactory.getExtension(SpringExtensionFactory.java:94)
	at org.apache.dubbo.common.extension.factory.AdaptiveExtensionFactory.getExtension(AdaptiveExtensionFactory.java:47)
	at org.apache.dubbo.common.extension.ExtensionLoader.injectExtension(ExtensionLoader.java:570)
	at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:532)
	at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:346)
	at org.apache.dubbo.common.extension.ExtensionLoader.getActivateExtension(ExtensionLoader.java:230)
	at org.apache.dubbo.common.extension.ExtensionLoader.getActivateExtension(ExtensionLoader.java:194)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.buildInvokerChain(ProtocolFilterWrapper.java:55)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:130)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.registry.integration.RegistryDirectory.toInvokers(RegistryDirectory.java:423)
	at org.apache.dubbo.registry.integration.RegistryDirectory.refreshInvoker(RegistryDirectory.java:280)
	at org.apache.dubbo.registry.integration.RegistryDirectory.refreshOverrideAndInvoker(RegistryDirectory.java:239)
	at org.apache.dubbo.registry.integration.RegistryDirectory.notify(RegistryDirectory.java:233)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboMetadataServiceURLs(AbstractSpringCloudRegistry.java:352)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribe(AbstractSpringCloudRegistry.java:163)
	at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:295)
	at org.apache.dubbo.registry.integration.RegistryDirectory.subscribe(RegistryDirectory.java:172)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:412)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:393)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:69)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:71)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:128)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:396)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:329)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:250)
	at com.alibaba.cloud.dubbo.service.DubboGenericServiceFactory.create(DubboGenericServiceFactory.java:81)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceInvocationHandler.&lt;init&gt;(DubboMetadataServiceInvocationHandler.java:40)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.newProxy(DubboMetadataServiceProxy.java:92)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.lambda$initProxy$0(DubboMetadataServiceProxy.java:53)
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy.initProxy(DubboMetadataServiceProxy.java:52)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initDubboMetadataServiceProxy(DubboServiceMetadataRepository.java:647)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$null$4(DubboServiceMetadataRepository.java:625)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.lambda$initSubscribedDubboMetadataService$5(DubboServiceMetadataRepository.java:621)
	at java.util.Optional.ifPresent(Optional.java:159)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initSubscribedDubboMetadataService(DubboServiceMetadataRepository.java:620)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initializeMetadata(DubboServiceMetadataRepository.java:292)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$FastClassBySpringCGLIB$$4ef4b7bd.invoke(&lt;generated&gt;)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$EnhancerBySpringCGLIB$$aec22326.initializeMetadata(&lt;generated&gt;)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURL(AbstractSpringCloudRegistry.java:257)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.lambda$doSubscribeDubboServiceURLs$0(AbstractSpringCloudRegistry.java:206)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1082)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:206)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURLs(AbstractSpringCloudRegistry.java:172)
	at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.doSubscribe(AbstractSpringCloudRegistry.java:166)
	at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:295)
	at org.apache.dubbo.registry.integration.RegistryDirectory.subscribe(RegistryDirectory.java:172)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:412)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:393)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:69)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:71)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:128)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:396)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:329)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:250)
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.getOrCreateProxy(ReferenceAnnotationBeanPostProcessor.java:246)
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.doGetInjectedBean(ReferenceAnnotationBeanPostProcessor.java:143)
	at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor.getInjectedObject(AnnotationInjectedBeanPostProcessor.java:359)
	at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor$AnnotatedFieldElement.inject(AnnotationInjectedBeanPostProcessor.java:539)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:116)
	at org.apache.dubbo.config.spring.beans.factory.annotation.AnnotationInjectedBeanPostProcessor.postProcessPropertyValues(AnnotationInjectedBeanPostProcessor.java:146)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1434)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.resolveBeanReference(ConfigurationClassEnhancer.java:394)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:366)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87.securityUserFilter(&lt;generated&gt;)
	at com.ig.web.quake.conf.WebMvcConfig.securityUserFilterRegistration(WebMvcConfig.java:53)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87.CGLIB$securityUserFilterRegistration$4(&lt;generated&gt;)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87$$FastClassBySpringCGLIB$$aa41d8bb.invoke(&lt;generated&gt;)
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363)
	at com.ig.web.quake.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$e0c6cf87.securityUserFilterRegistration(&lt;generated&gt;)
	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.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:640)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:475)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:207)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:211)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:202)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.addServletContextInitializerBeans(ServletContextInitializerBeans.java:96)
	at org.springframework.boot.web.servlet.ServletContextInitializerBeans.&lt;init&gt;(ServletContextInitializerBeans.java:85)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getServletContextInitializerBeans(ServletWebServerApplicationContext.java:253)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.selfInitialize(ServletWebServerApplicationContext.java:227)
	at org.springframework.boot.web.embedded.tomcat.TomcatStarter.onStartup(TomcatStarter.java:53)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5135)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.startup.Tomcat.start(Tomcat.java:459)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:107)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.&lt;init&gt;(TomcatWebServer.java:88)
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:438)
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:191)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:153)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at com.ig.web.quake.IGWebQuakeBootstrap.main(IGWebQuakeBootstrap.java:55)
</code></pre></div>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> I have searched the <a href="https://github.com/apache/dubbo/issues">issues</a> of this repository and believe that this is not a duplicate.</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> I have checked the <a href="https://github.com/apache/dubbo/blob/master/FAQ.md">FAQ</a> of this repository and believe that this is not a duplicate.</li>
</ul>
<h3 dir="auto">Environment</h3>
<ul dir="auto">
<li>Dubbo version: master</li>
<li>Operating System version: macos  10.14.3</li>
<li>Java version: 1.8.0_201-b09</li>
</ul>
<h3 dir="auto">Steps to reproduce this issue</h3>
<ol dir="auto">
<li>demo-xml model，use zookeeper registery  just  change:<br>
&lt;dubbo:registry address="multicast://224.5.6.7:1234" /&gt;<br>
to<br>
&lt;dubbo:registry protocol="zookeeper" address="127.0.0.1:2181" /&gt;</li>
</ol>
<p dir="auto">2.Exception：<br>
java.lang.IllegalStateException: No such extension org.apache.dubbo.registry.RegistryFactory by name zookeeper</p>
<p dir="auto">3.solution:<br>
add maven dependency in demo pom as:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content=" &lt;dependency&gt;
            &lt;groupId&gt;org.apache.dubbo&lt;/groupId&gt;
            &lt;artifactId&gt;dubbo-registry-zookeeper&lt;/artifactId&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.apache.dubbo&lt;/groupId&gt;
            &lt;artifactId&gt;dubbo-configcenter-zookeeper&lt;/artifactId&gt;
        &lt;/dependency&gt;"><pre class="notranslate"><code class="notranslate"> &lt;dependency&gt;
            &lt;groupId&gt;org.apache.dubbo&lt;/groupId&gt;
            &lt;artifactId&gt;dubbo-registry-zookeeper&lt;/artifactId&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.apache.dubbo&lt;/groupId&gt;
            &lt;artifactId&gt;dubbo-configcenter-zookeeper&lt;/artifactId&gt;
        &lt;/dependency&gt;
</code></pre></div>
<p dir="auto">maybe it's not useful in multicast registry, so may be some lines in readme can help</p>
<h3 dir="auto">Expected Result</h3>
<p dir="auto">can run without Exception</p>
<h3 dir="auto">Actual Result</h3>
<p dir="auto">Exception：<br>
java.lang.IllegalStateException: No such extension org.apache.dubbo.registry.RegistryFactory by name zookeeper</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="java.lang.IllegalStateException: No such extension org.apache.dubbo.registry.RegistryFactory by name zookeeper
	at org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:520)
	at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:527)
	at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:351)
	at org.apache.dubbo.registry.RegistryFactory$Adaptive.getRegistry(RegistryFactory$Adaptive.java)
	at org.apache.dubbo.registry.integration.RegistryProtocol.getRegistry(RegistryProtocol.java:298)
	at org.apache.dubbo.registry.integration.RegistryProtocol.access$1100(RegistryProtocol.java:111)
	at org.apache.dubbo.registry.integration.RegistryProtocol$ExporterChangeableWrapper.unexport(RegistryProtocol.java:669)
	at org.apache.dubbo.registry.integration.RegistryProtocol.destroy(RegistryProtocol.java:442)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.destroy(ProtocolFilterWrapper.java:135)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.destroy(ProtocolListenerWrapper.java:79)
	at org.apache.dubbo.config.DubboShutdownHook.destroyProtocols(DubboShutdownHook.java:103)
	at org.apache.dubbo.config.DubboShutdownHook.doDestroy(DubboShutdownHook.java:91)
	at org.apache.dubbo.config.spring.extension.SpringExtensionFactory$ShutdownHookListener.onApplicationEvent(SpringExtensionFactory.java:114)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:393)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:991)
	at org.springframework.context.support.AbstractApplicationContext$2.run(AbstractApplicationContext.java:929)```"><pre class="notranslate"><code class="notranslate">java.lang.IllegalStateException: No such extension org.apache.dubbo.registry.RegistryFactory by name zookeeper
	at org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:520)
	at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:527)
	at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:351)
	at org.apache.dubbo.registry.RegistryFactory$Adaptive.getRegistry(RegistryFactory$Adaptive.java)
	at org.apache.dubbo.registry.integration.RegistryProtocol.getRegistry(RegistryProtocol.java:298)
	at org.apache.dubbo.registry.integration.RegistryProtocol.access$1100(RegistryProtocol.java:111)
	at org.apache.dubbo.registry.integration.RegistryProtocol$ExporterChangeableWrapper.unexport(RegistryProtocol.java:669)
	at org.apache.dubbo.registry.integration.RegistryProtocol.destroy(RegistryProtocol.java:442)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.destroy(ProtocolFilterWrapper.java:135)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.destroy(ProtocolListenerWrapper.java:79)
	at org.apache.dubbo.config.DubboShutdownHook.destroyProtocols(DubboShutdownHook.java:103)
	at org.apache.dubbo.config.DubboShutdownHook.doDestroy(DubboShutdownHook.java:91)
	at org.apache.dubbo.config.spring.extension.SpringExtensionFactory$ShutdownHookListener.onApplicationEvent(SpringExtensionFactory.java:114)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:393)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:991)
	at org.springframework.context.support.AbstractApplicationContext$2.run(AbstractApplicationContext.java:929)```
</code></pre></div>