Dubbo版本：2.7.6
在服务运行中频繁打印java.lang.IllegalStateException: safe guard client , should not be called ,must have a bug.的异常提示！
14:00:20.193 [Curator-TreeCache-1] WARN o.a.d.r.p.d.LazyConnectExchangeClient - [warning,138] - safe guard client , should not be called ,must have a bug. java.lang.IllegalStateException: safe guard client , should not be called ,must have a bug. at org.apache.dubbo.rpc.protocol.dubbo.LazyConnectExchangeClient.warning(LazyConnectExchangeClient.java:138) at org.apache.dubbo.rpc.protocol.dubbo.LazyConnectExchangeClient.request(LazyConnectExchangeClient.java:127) at org.apache.dubbo.rpc.protocol.dubbo.ReferenceCountExchangeClient.request(ReferenceCountExchangeClient.java:91) at org.apache.dubbo.rpc.protocol.dubbo.DubboInvoker.doInvoke(DubboInvoker.java:100) at org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:162) at org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:52) at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78) at org.apache.dubbo.rpc.filter.GenericImplFilter.invoke(GenericImplFilter.java:126) at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:81) at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:89) at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:81) at org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:51) at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:81) at org.apache.dubbo.rpc.filter.ConsumerContextFilter.invoke(ConsumerContextFilter.java:55) at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:81) at org.apache.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56) at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:82) at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:259) at org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47) at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92) at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:82) at org.apache.dubbo.rpc.cluster.support.registry.ZoneAwareClusterInvoker.doInvoke(ZoneAwareClusterInvoker.java:91) at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:259) at org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47) at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92) at org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47) at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92) at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:82) at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:74) at org.apache.dubbo.common.bytecode.proxy8.$invoke(proxy8.java) at com.alibaba.cloud.dubbo.service.DubboMetadataServiceInvocationHandler.invoke(DubboMetadataServiceInvocationHandler.java:48) at com.sun.proxy.$Proxy141.getServiceRestMetadata(Unknown Source) at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.getServiceRestMetadataSet(DubboServiceMetadataRepository.java:607) at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initDubboRestServiceMetadataRepository(DubboServiceMetadataRepository.java:496) at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initSubscribedDubboMetadataService(DubboServiceMetadataRepository.java:666) at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.initializeMetadata(DubboServiceMetadataRepository.java:293) at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$FastClassBySpringCGLIB$$4ef4b7bd.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:771) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749) 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$CglibMethodInvocation.proceed(CglibAopProxy.java:749) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691) at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$EnhancerBySpringCGLIB$$b5b422c6.initializeMetadata(<generated>) at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry.subscribeDubboServiceURL(AbstractSpringCloudRegistry.java:281) at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry$1.onApplicationEvent(AbstractSpringCloudRegistry.java:204) at com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry$1.onApplicationEvent(AbstractSpringCloudRegistry.java:197) 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:403) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceDiscoveryAutoConfiguration.dispatchServiceInstancesChangedEvent(DubboServiceDiscoveryAutoConfiguration.java:168) at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceDiscoveryAutoConfiguration.access$200(DubboServiceDiscoveryAutoConfiguration.java:106) at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceDiscoveryAutoConfiguration$ZookeeperConfiguration.beforeChildEvent(DubboServiceDiscoveryAutoConfiguration.java:439) at sun.reflect.GeneratedMethodAccessor195.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644) at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:626) at org.springframework.aop.aspectj.AspectJMethodBeforeAdvice.before(AspectJMethodBeforeAdvice.java:44) at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:55) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749) at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:47) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691) at org.springframework.cloud.zookeeper.discovery.ZookeeperServiceWatch$$EnhancerBySpringCGLIB$$75742748.childEvent(<generated>) at org.apache.curator.framework.recipes.cache.TreeCache$2.apply(TreeCache.java:749) at org.apache.curator.framework.recipes.cache.TreeCache$2.apply(TreeCache.java:743) at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93) at org.apache.curator.shaded.com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:435) at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:85) at org.apache.curator.framework.recipes.cache.TreeCache.callListeners(TreeCache.java:742) at org.apache.curator.framework.recipes.cache.TreeCache.access$1700(TreeCache.java:72) at org.apache.curator.framework.recipes.cache.TreeCache$4.run(TreeCache.java:860) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266) at java.util.concurrent.FutureTask.run(FutureTask.java) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)