Springboot启动提示：com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception

Springboot启动提示：com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception

错误提示：

10:51:55.121 [main] INFO  c.a.n.c.r.client - [printIfInfoEnabled,60] - [1e2ab6c0-368b-46b3-95d6-d7a05eaee886_config-0] Try to connect to server on start up, server: {serverIp='127.0.0.1', server main port=8848}
10:51:56.822 [main] ERROR c.a.n.c.r.c.g.GrpcClient - [printIfErrorEnabled,99] - Server check fail, please check server 127.0.0.1 ,port 9848 is available , error ={}
java.util.concurrent.ExecutionException: com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
	at com.alibaba.nacos.shaded.com.google.common.util.concurrent.AbstractFuture.getDonevalue(AbstractFuture.java:566)
	at com.alibaba.nacos.shaded.com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:445)
	at com.alibaba.nacos.common.remote.client.grpc.GrpcClient.serverCheck(GrpcClient.java:146)
	at com.alibaba.nacos.common.remote.client.grpc.GrpcClient.connectToServer(GrpcClient.java:268)
	at com.alibaba.nacos.common.remote.client.RpcClient.start(RpcClient.java:394)
	at com.alibaba.nacos.client.config.impl.ClientWorker$ConfigRpcTransportClient.ensureRpcClient(ClientWorker.java:941)
	at com.alibaba.nacos.client.config.impl.ClientWorker$ConfigRpcTransportClient.getoneRunningClient(ClientWorker.java:1104)
	at com.alibaba.nacos.client.config.impl.ClientWorker$ConfigRpcTransportClient.queryConfig(ClientWorker.java:996)
	at com.alibaba.nacos.client.config.impl.ClientWorker.getServerConfig(ClientWorker.java:407)
	at com.alibaba.nacos.client.config.NacosConfigService.getConfigInner(NacosConfigService.java:166)
	at com.alibaba.nacos.client.config.NacosConfigService.getConfig(NacosConfigService.java:94)
	at com.alibaba.cloud.nacos.client.NacosPropertySourceBuilder.loadNacosData(NacosPropertySourceBuilder.java:85)
	at com.alibaba.cloud.nacos.client.NacosPropertySourceBuilder.build(NacosPropertySourceBuilder.java:73)
	at com.alibaba.cloud.nacos.client.NacosPropertySourceLocator.loadNacosPropertySource(NacosPropertySourceLocator.java:199)
	at com.alibaba.cloud.nacos.client.NacosPropertySourceLocator.loadNacosDataIfPresent(NacosPropertySourceLocator.java:186)
	at com.alibaba.cloud.nacos.client.NacosPropertySourceLocator.loadNacosConfiguration(NacosPropertySourceLocator.java:158)
	at com.alibaba.cloud.nacos.client.NacosPropertySourceLocator.loadSharedConfiguration(NacosPropertySourceLocator.java:116)
	at com.alibaba.cloud.nacos.client.NacosPropertySourceLocator.locate(NacosPropertySourceLocator.java:101)
	at org.springframework.cloud.bootstrap.config.PropertySourceLocator.locateCollection(PropertySourceLocator.java:51)
	at org.springframework.cloud.bootstrap.config.PropertySourceLocator.locateCollection(PropertySourceLocator.java:47)
	at org.springframework.cloud.bootstrap.config.PropertySourceBootstrapConfiguration.initialize(PropertySourceBootstrapConfiguration.java:95)
	at org.springframework.boot.SpringApplication.applyInitializers(SpringApplication.java:634)
	at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:403)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:337)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332)
	at com.wd.SystemApplication.main(SystemApplication.java:22)
Caused by: com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
	at com.alibaba.nacos.shaded.io.grpc.Status.asRuntimeException(Status.java:533)
	at com.alibaba.nacos.shaded.io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:490)
	at com.alibaba.nacos.shaded.io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
	at com.alibaba.nacos.shaded.io.grpc.internal.CensusStatsModule$StatsClientInterceptor.onClose(CensusStatsModule.java:700)
	at com.alibaba.nacos.shaded.io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
	at com.alibaba.nacos.shaded.io.grpc.internal.CensusTracingModule$TracingClientInterceptor.onClose(CensusTracingModule.java:399)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:510)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl.access0(ClientCallImpl.java:66)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:630)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access0(ClientCallImpl.java:518)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImplStreamClosed.runInternal(ClientCallImpl.java:692)
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImplStreamClosed.runInContext(ClientCallImpl.java:681)
	at com.alibaba.nacos.shaded.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
	at com.alibaba.nacos.shaded.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: /127.0.0.1:9848

解决方法：在nacos服务的机器添加隧道，两个端口都加上后，可以正常运行。只解决了我本人的实际情况，望谅解。