coder-michaelwu edited a comment on pull request #6959:
URL: https://github.com/apache/dubbo/pull/6959#issuecomment-933442143
今天在`dubbo 2.7.8`，` spring-cloud-starter-dubbo:2.2.6.RELEASE`
也遇见这个问题，不过貌似除了打印出该日志，并没有其他影响，仅在此评论，留作记录。
```
2021-10-04 20:25:49.943 WARN 46224 --- [nio-8888-exec-8]
o.a.d.r.p.d.LazyConnectExchangeClient : 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)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.dubbo.LazyConnectExchangeClient.request(LazyConnectExchangeClient.java:127)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.dubbo.ReferenceCountExchangeClient.request(ReferenceCountExchangeClient.java:91)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.dubbo.DubboInvoker.doInvoke(DubboInvoker.java:105)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:163)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:52)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:89)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:83)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:51)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:83)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.filter.ConsumerContextFilter.invoke(ConsumerContextFilter.java:69)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:83)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:82)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:260)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:88)
[dubbo-2.7.8.jar:2.7.8]
at
org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:74)
[dubbo-2.7.8.jar:2.7.8]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
~[na:1.8.0_231]
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
~[na:1.8.0_231]
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[na:1.8.0_231]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_231]
at
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
[tomcat-embed-core-9.0.46.jar:4.0.FR]
at
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
[tomcat-embed-core-9.0.46.jar:4.0.FR]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
[tomcat-embed-websocket-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[na:1.8.0_231]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[na:1.8.0_231]
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
[tomcat-embed-core-9.0.46.jar:9.0.46]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_231]
```
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