服务报nacos链接异常，无法链接等。

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153934475 剑圣 2021-10-26 11:05

一、该问题的重现步骤是什么？

1. 系统运行一段时间，可能1-3天不等，出现nacos链接不上。

二、你期待的结果是什么？实际看到的又是什么？

希望保持nacos链接的稳定性

三、你正在使用的是什么产品，什么版本？在什么操作系统上？

spring cloud 2.8.2,在centos7.8上，nacos2.0.1，如图项目的集群情况。

四、请提供详细的错误堆栈信息，这很重要。

2021-10-25 22:14:52.228 ERROR 1 --- [aming.updater.0] com.alibaba.nacos.common.remote.client : Send request fail, request=ServiceQueryRequest{headers={}, requestId='null'}, retryTimes=0,errorMessage=java.util.concurrent.TimeoutException: Waited 3000 milliseconds (plus 6314 milliseconds, 839650 nanoseconds delay) for com.alibaba.nacos.shaded.io.grpc.stub.ClientCalls$GrpcFuture@71519140[status=PENDING, info=[GrpcFuture{clientCall={delegate={delegate=ClientCallImpl{method=MethodDescriptor{fullMethodName=Request/request, type=UNARY, idempotent=false, safe=false, sampledToLocalTracing=true, requestMarshaller=com.alibaba.nacos.shaded.io.grpc.protobuf.lite.ProtoLiteUtils$MessageMarshaller@a746c7f5, responseMarshaller=com.alibaba.nacos.shaded.io.grpc.protobuf.lite.ProtoLiteUtils$MessageMarshaller@45fece32, schemaDescriptor=com.alibaba.nacos.api.grpc.auto.RequestGrpc$RequestMethodDescriptorSupplier@d4ee5bbe}}}}}]]

2021-10-25 22:15:01.017 ERROR 1 --- [ XNIO-1 task-1] com.alibaba.nacos.common.remote.client : Send request fail, request=ServiceListRequest{headers={app=unknown}, requestId='null'}, retryTimes=0,errorMessage=Client not connected,current status:UNHEALTHY

2021-10-25 22:15:01.012 ERROR 1 --- [aming.updater.0] com.alibaba.nacos.common.remote.client : Send request fail, request=ServiceQueryRequest{headers={app=unknown}, requestId='null'}, retryTimes=0,errorMessage=Client not connected,current status:UNHEALTHY

2021-10-25 22:15:03.213 ERROR 1 --- [aming.updater.0] com.alibaba.nacos.common.remote.client : Send request fail, request=ServiceQueryRequest{headers={app=unknown}, requestId='null'}, retryTimes=0,errorMessage=Client not connected,current status:UNHEALTHY

2021-10-25 22:15:06.216 ERROR 1 --- [aming.updater.0] com.alibaba.nacos.common.remote.client : Send request fail, request=ServiceQueryRequest{headers={app=unknown}, requestId='null'}, retryTimes=1,errorMessage=Client not connected,current status:UNHEALTHY

2021-10-25 22:15:03.212 ERROR 1 --- [ XNIO-1 task-1] c.a.c.n.discovery.NacosDiscoveryClient : get service name from nacos server fail,

com.alibaba.nacos.api.exception.NacosException: Request nacos server failed:

at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.requestToServer(NamingGrpcClientProxy.java:227)

at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.getServiceList(NamingGrpcClientProxy.java:175)

at com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate.getServiceList(NamingClientProxyDelegate.java:137)

at com.alibaba.nacos.client.naming.NacosNamingService.getServicesOfServer(NacosNamingService.java:440)

at com.alibaba.nacos.client.naming.NacosNamingService.getServicesOfServer(NacosNamingService.java:428)

at com.alibaba.cloud.nacos.discovery.NacosServiceDiscovery.getServices(NacosServiceDiscovery.java:69)

at com.alibaba.cloud.nacos.discovery.NacosDiscoveryClient.getServices(NacosDiscoveryClient.java:67)

at org.springframework.cloud.client.discovery.composite.CompositeDiscoveryClient.getServices(CompositeDiscoveryClient.java:67)

at org.springframework.cloud.client.discovery.health.DiscoveryClientHealthIndicator.health(DiscoveryClientHealthIndicator.java:74)

at org.springframework.cloud.client.discovery.health.DiscoveryCompositeHealthContributor.lambda$asHealthIndicator$0(DiscoveryCompositeHealthContributor.java:77)

at org.springframework.cloud.client.discovery.health.DiscoveryCompositeHealthContributor$$Lambda$1375/0000000078187D40.health(Unknown Source)

at org.springframework.boot.actuate.health.HealthIndicator.getHealth(HealthIndicator.java:37)

at org.springframework.boot.actuate.health.HealthEndpointWebExtension.getHealth(HealthEndpointWebExtension.java:85)

at org.springframework.boot.actuate.health.HealthEndpointWebExtension.getHealth(HealthEndpointWebExtension.java:44)

at org.springframework.boot.actuate.health.HealthEndpointSupport.getContribution(HealthEndpointSupport.java:99)

at org.springframework.boot.actuate.health.HealthEndpointSupport.getAggregateHealth(HealthEndpointSupport.java:110)

at org.springframework.boot.actuate.health.HealthEndpointSupport.getContribution(HealthEndpointSupport.java:96)

at org.springframework.boot.actuate.health.HealthEndpointSupport.getAggregateHealth(HealthEndpointSupport.java:110)

at org.springframework.boot.actuate.health.HealthEndpointSupport.getContribution(HealthEndpointSupport.java:96)

at org.springframework.boot.actuate.health.HealthEndpointSupport.getHealth(HealthEndpointSupport.java:74)

at org.springframework.boot.actuate.health.HealthEndpointSupport.getHealth(HealthEndpointSupport.java:61)

at org.springframework.boot.actuate.health.HealthEndpointWebExtension.health(HealthEndpointWebExtension.java:71)

at org.springframework.boot.actuate.health.HealthEndpointWebExtension.health(HealthEndpointWebExtension.java:60)

at sun.reflect.GeneratedMethodAccessor369.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282)

at org.springframework.boot.actuate.endpoint.invoke.reflect.ReflectiveOperationInvoker.invoke(ReflectiveOperationInvoker.java:77)

at org.springframework.boot.actuate.endpoint.annotation.AbstractDiscoveredOperation.invoke(AbstractDiscoveredOperation.java:60)

at org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$ServletWebOperationAdapter.handle(AbstractWebMvcEndpointHandlerMapping.java:305)

at org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$OperationHandler.handle(AbstractWebMvcEndpointHandlerMapping.java:388)

at sun.reflect.GeneratedMethodAccessor367.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:497)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:584)

at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)

at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)

at org.springblade.core.log.filter.LogTraceFilter.doFilter(LogTraceFilter.java:39)

at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)