Ncos项目调用服务报错，提示java.net.UnknownHostException: nacos-consumer？

Question

生产方：

@RestController
public class ProducerController {

    @Autowired
    private RestTemplate restTemplate;


    @GetMapping(value = "/echo/{string}")
    public String produce(@PathVariable String string) {
        return restTemplate.getForObject("http://nacos-consumer/echo/" + string, String.class);
    }
}

生产方properties文件：

# Nacos帮助文档: https://nacos.io/zh-cn/docs/concepts.html
spring.application.name=nacos-producer
# Nacos认证信息
spring.cloud.nacos.discovery.username=nacos
spring.cloud.nacos.discovery.password=nacos
# Nacos 服务发现与注册配置，其中子属性 server-addr 指定 Nacos 服务器主机和端口
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
# 注册到 nacos 的指定 namespace，默认为 public
spring.cloud.nacos.discovery.namespace=public
# spring.cloud.nacos.discovery.service=nacos-producer

management.endpoints.web.exposure.include=*

消费方：

package com.example.nacosdiscoverycloudprovider.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
public class NacosController {

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/echo/{string}")
    public String echoString(@PathVariable String string) {
        return "Hello "+string;
    }
}

消费方application.properties：

# Nacos帮助文档: https://nacos.io/zh-cn/docs/concepts.html
spring.application.name=nacos-consumer
server.port=8081
# Nacos认证信息
spring.cloud.nacos.discovery.username=nacos
spring.cloud.nacos.discovery.password=nacos
# Nacos 服务发现与注册配置，其中子属性 server-addr 指定 Nacos 服务器主机和端口
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
# 注册到 nacos 的指定 namespace，默认为 public
spring.cloud.nacos.discovery.namespace=public
#spring.cloud.nacos.discovery.service=nacos-consumer

management.endpoints.web.exposure.include=*

注册中心控制台：

访问的接口地址：http://127.0.0.1:8080/echo/peter
报错信息：

"C:\Program Files\Java\jdk-1.8\bin\java.exe" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.1\lib\idea_rt.jar=12291:C:\Program Files\JetBrains\IntelliJ IDEA 2024.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk-1.8\jre\lib\charsets.jar;C:\Program Files\Java\jdk-1.8\jre\lib\deploy.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk-1.8\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk-1.8\jre\lib\javaws.jar;C:\Program Files\Java\jdk-1.8\jre\lib\jce.jar;C:\Program Files\Java\jdk-1.8\jre\lib\jfr.jar;C:\Program Files\Java\jdk-1.8\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk-1.8\jre\lib\jsse.jar;C:\Program Files\Java\jdk-1.8\jre\lib\management-agent.jar;C:\Program Files\Java\jdk-1.8\jre\lib\plugin.jar;C:\Program Files\Java\jdk-1.8\jre\lib\resources.jar;C:\Program Files\Java\jdk-1.8\jre\lib\rt.jar;C:\MyData\JavaData\WorkSpace\idea-projects\nacos-discovery-cloud-producer\target\classes;C:\localRepository\org\springframework\boot\spring-boot-starter\2.7.18\spring-boot-starter-2.7.18.jar;C:\localRepository\org\springframework\boot\spring-boot\2.7.18\spring-boot-2.7.18.jar;C:\localRepository\org\springframework\spring-context\5.3.31\spring-context-5.3.31.jar;C:\localRepository\org\springframework\boot\spring-boot-autoconfigure\2.7.18\spring-boot-autoconfigure-2.7.18.jar;C:\localRepository\org\springframework\boot\spring-boot-starter-logging\2.7.18\spring-boot-starter-logging-2.7.18.jar;C:\localRepository\ch\qos\logback\logback-classic\1.2.12\logback-classic-1.2.12.jar;C:\localRepository\ch\qos\logback\logback-core\1.2.12\logback-core-1.2.12.jar;C:\localRepository\org\apache\logging\log4j\log4j-to-slf4j\2.17.2\log4j-to-slf4j-2.17.2.jar;C:\localRepository\org\apache\logging\log4j\log4j-api\2.17.2\log4j-api-2.17.2.jar;C:\localRepository\org\slf4j\jul-to-slf4j\1.7.36\jul-to-slf4j-1.7.36.jar;C:\localRepository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\localRepository\org\springframework\spring-core\5.3.31\spring-core-5.3.31.jar;C:\localRepository\org\springframework\spring-jcl\5.3.31\spring-jcl-5.3.31.jar;C:\localRepository\org\yaml\snakeyaml\1.30\snakeyaml-1.30.jar;C:\localRepository\org\springframework\boot\spring-boot-starter-web\2.7.18\spring-boot-starter-web-2.7.18.jar;C:\localRepository\org\springframework\boot\spring-boot-starter-json\2.7.18\spring-boot-starter-json-2.7.18.jar;C:\localRepository\com\fasterxml\jackson\core\jackson-databind\2.13.5\jackson-databind-2.13.5.jar;C:\localRepository\com\fasterxml\jackson\core\jackson-annotations\2.13.5\jackson-annotations-2.13.5.jar;C:\localRepository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.13.5\jackson-datatype-jdk8-2.13.5.jar;C:\localRepository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.13.5\jackson-datatype-jsr310-2.13.5.jar;C:\localRepository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.13.5\jackson-module-parameter-names-2.13.5.jar;C:\localRepository\org\springframework\boot\spring-boot-starter-tomcat\2.7.18\spring-boot-starter-tomcat-2.7.18.jar;C:\localRepository\org\apache\tomcat\embed\tomcat-embed-core\9.0.83\tomcat-embed-core-9.0.83.jar;C:\localRepository\org\apache\tomcat\embed\tomcat-embed-el\9.0.83\tomcat-embed-el-9.0.83.jar;C:\localRepository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.83\tomcat-embed-websocket-9.0.83.jar;C:\localRepository\org\springframework\spring-web\5.3.31\spring-web-5.3.31.jar;C:\localRepository\org\springframework\spring-beans\5.3.31\spring-beans-5.3.31.jar;C:\localRepository\org\springframework\spring-webmvc\5.3.31\spring-webmvc-5.3.31.jar;C:\localRepository\org\springframework\spring-aop\5.3.31\spring-aop-5.3.31.jar;C:\localRepository\org\springframework\spring-expression\5.3.31\spring-expression-5.3.31.jar;C:\localRepository\com\alibaba\cloud\spring-cloud-starter-alibaba-nacos-discovery\2021.0.5.0\spring-cloud-starter-alibaba-nacos-discovery-2021.0.5.0.jar;C:\localRepository\com\alibaba\cloud\spring-cloud-alibaba-commons\2021.0.5.0\spring-cloud-alibaba-commons-2021.0.5.0.jar;C:\localRepository\com\alibaba\nacos\nacos-client\2.2.0\nacos-client-2.2.0.jar;C:\localRepository\com\alibaba\nacos\nacos-auth-plugin\2.2.0\nacos-auth-plugin-2.2.0.jar;C:\localRepository\com\alibaba\nacos\nacos-encryption-plugin\2.2.0\nacos-encryption-plugin-2.2.0.jar;C:\localRepository\commons-codec\commons-codec\1.15\commons-codec-1.15.jar;C:\localRepository\com\fasterxml\jackson\core\jackson-core\2.13.5\jackson-core-2.13.5.jar;C:\localRepository\org\apache\httpcomponents\httpasyncclient\4.1.5\httpasyncclient-4.1.5.jar;C:\localRepository\org\apache\httpcomponents\httpcore\4.4.16\httpcore-4.4.16.jar;C:\localRepository\org\apache\httpcomponents\httpcore-nio\4.4.16\httpcore-nio-4.4.16.jar;C:\localRepository\org\apache\httpcomponents\httpclient\4.5.14\httpclient-4.5.14.jar;C:\localRepository\io\prometheus\simpleclient\0.15.0\simpleclient-0.15.0.jar;C:\localRepository\io\prometheus\simpleclient_tracer_otel\0.15.0\simpleclient_tracer_otel-0.15.0.jar;C:\localRepository\io\prometheus\simpleclient_tracer_common\0.15.0\simpleclient_tracer_common-0.15.0.jar;C:\localRepository\io\prometheus\simpleclient_tracer_otel_agent\0.15.0\simpleclient_tracer_otel_agent-0.15.0.jar;C:\localRepository\com\alibaba\spring\spring-context-support\1.0.11\spring-context-support-1.0.11.jar;C:\localRepository\org\springframework\cloud\spring-cloud-commons\3.1.5\spring-cloud-commons-3.1.5.jar;C:\localRepository\org\springframework\security\spring-security-crypto\5.7.11\spring-security-crypto-5.7.11.jar;C:\localRepository\org\springframework\cloud\spring-cloud-context\3.1.5\spring-cloud-context-3.1.5.jar;C:\localRepository\org\slf4j\slf4j-api\1.7.36\slf4j-api-1.7.36.jar" com.example.nacosdiscoverycloudprovider.NacosDiscoveryCloudProducerApplication
2024-08-17 10:18:49.910  INFO 87244 --- [           main] c.a.n.client.env.SearchableProperties    : properties search order:PROPERTIES->JVM->ENV->DEFAULT_SETTING

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::               (v2.7.18)

2024-08-17 10:18:50.044  INFO 87244 --- [           main] n.NacosDiscoveryCloudProducerApplication : Starting NacosDiscoveryCloudProducerApplication using Java 1.8.0_421 on Hasee-PC with PID 87244 (C:\MyData\JavaData\WorkSpace\idea-projects\nacos-discovery-cloud-producer\target\classes started by btcho in C:\MyData\JavaData\WorkSpace\idea-projects\nacos-discovery-cloud-producer)
2024-08-17 10:18:50.044  INFO 87244 --- [           main] n.NacosDiscoveryCloudProducerApplication : No active profile set, falling back to 1 default profile: "default"
2024-08-17 10:18:50.567  INFO 87244 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=6fd54010-1d76-3fba-bc3f-71b99c1d8fe3
2024-08-17 10:18:50.813  INFO 87244 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2024-08-17 10:18:50.814  INFO 87244 --- [           main] o.a.catalina.core.AprLifecycleListener   : Loaded Apache Tomcat Native library [1.3.0] using APR version [1.7.4].
2024-08-17 10:18:50.814  INFO 87244 --- [           main] o.a.catalina.core.AprLifecycleListener   : APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true], UDS [true].
2024-08-17 10:18:50.814  INFO 87244 --- [           main] o.a.catalina.core.AprLifecycleListener   : APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
2024-08-17 10:18:50.820  INFO 87244 --- [           main] o.a.catalina.core.AprLifecycleListener   : OpenSSL successfully initialized [OpenSSL 3.0.13 30 Jan 2024]
2024-08-17 10:18:50.830  INFO 87244 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2024-08-17 10:18:50.830  INFO 87244 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.83]
2024-08-17 10:18:51.003  INFO 87244 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2024-08-17 10:18:51.003  INFO 87244 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 928 ms
2024-08-17 10:18:52.320  INFO 87244 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2024-08-17 10:18:52.390  INFO 87244 --- [           main] c.a.n.p.a.s.c.ClientAuthPluginManager    : [ClientAuthPluginManager] Load ClientAuthService com.alibaba.nacos.client.auth.impl.NacosClientAuthServiceImpl success.
2024-08-17 10:18:52.390  INFO 87244 --- [           main] c.a.n.p.a.s.c.ClientAuthPluginManager    : [ClientAuthPluginManager] Load ClientAuthService com.alibaba.nacos.client.auth.ram.RamClientAuthServiceImpl success.
2024-08-17 10:18:54.047  INFO 87244 --- [           main] c.a.c.n.registry.NacosServiceRegistry    : nacos registry, DEFAULT_GROUP nacos-producer 192.168.237.1:8080 register finished
2024-08-17 10:18:54.311  INFO 87244 --- [           main] n.NacosDiscoveryCloudProducerApplication : Started NacosDiscoveryCloudProducerApplication in 5.011 seconds (JVM running for 5.857)
2024-08-17 10:20:19.054  INFO 87244 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2024-08-17 10:20:19.054  INFO 87244 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2024-08-17 10:20:19.055  INFO 87244 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 0 ms
2024-08-17 10:20:21.801 ERROR 87244 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://nacos-consumer/echo/peter": nacos-consumer; nested exception is java.net.UnknownHostException: nacos-consumer] with root cause

java.net.UnknownHostException: nacos-consumer
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:196) ~[na:1.8.0_421]
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162) ~[na:1.8.0_421]
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394) ~[na:1.8.0_421]
    at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_421]
    at java.net.Socket.connect(Socket.java:555) ~[na:1.8.0_421]
    at sun.net.NetworkClient.doConnect(NetworkClient.java:180) ~[na:1.8.0_421]
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:499) ~[na:1.8.0_421]
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:594) ~[na:1.8.0_421]
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:278) ~[na:1.8.0_421]
    at sun.net.www.http.HttpClient.New(HttpClient.java:375) ~[na:1.8.0_421]
    at sun.net.www.http.HttpClient.New(HttpClient.java:393) ~[na:1.8.0_421]
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1240) ~[na:1.8.0_421]
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1167) ~[na:1.8.0_421]
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1061) ~[na:1.8.0_421]
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:995) ~[na:1.8.0_421]
    at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:76) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:782) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:717) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:340) ~[spring-web-5.3.31.jar:5.3.31]
    at com.example.nacosdiscoverycloudprovider.controller.ProducerController.produce(ProducerController.java:19) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_421]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_421]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_421]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_421]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1072) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:529) ~[tomcat-embed-core-9.0.83.jar:4.0.FR]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.31.jar:5.3.31]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:623) ~[tomcat-embed-core-9.0.83.jar:4.0.FR]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:209) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.31.jar:5.3.31]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.31.jar:5.3.31]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.31.jar:5.3.31]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.31.jar:5.3.31]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168) ~[tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:390) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:928) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1794) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.83.jar:9.0.83]
    at java.lang.Thread.run(Thread.java:750) [na:1.8.0_421]

我查了下，restTemplate是支持服务名调用的，问题到底出在哪里呢？
已解决，要添加如下依赖：

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-loadbalancer</artifactId>
        </dependency>

Answer 1

是不是配置RestTemplate这个Bean时没有添加@LoadBalanced注解。