使用RestTemplate时报错java.lang.IllegalStateException: No instances available for 127.0.0.1

蔚落 2021-10-24 01:24 185阅读 0赞

java.lang.IllegalStateException: No instances available for xxx
        at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.execute(RibbonLoadBalancerClient.java:75)
        at org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor.intercept(LoadBalancerInterceptor.java:53)
        at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86)
        at org.springframework.cloud.netflix.metrics.MetricsClientHttpRequestInterceptor.intercept(MetricsClientHttpRequestInterceptor.java:68)
        at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86)
        at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:70)
        at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
        at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
        at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:652)
        at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613)
        at org.springframework.web.client.RestTemplate.postForEntity(RestTemplate.java:407)
        at org.springframework.web.client.RestTemplate$$FastClassBySpringCGLIB$$aa4e9ed0.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
        at org.springframework.cloud.netflix.metrics.RestTemplateUrlTemplateCapturingAspect.captureUrlTemplate(RestTemplateUrlTemplateCapturingAspect.java:33)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656)
        at org.springframework.web.client.RestTemplate$$EnhancerBySpringCGLIB$$ec1f757d.postForEntity(<generated>)

必须使用应用名作为代替ip:端口，

http://127.0.0.1:8080/user/get

改成

http://应用名/user/get

不然会报错

使用RestTemplate时报错java.lang.IllegalStateException: No instances available for 127.0.0.1

不要使用ip+port的方式访问，取而代之的是应用名

1.这种方式发送的请求都会被ribbon拦截，ribbon从eureka注册中心获取服务列表，然后采用均衡策略进行访问

user:
      ribbon:
        eureka:
          enabled: true

2.这种方式发送的请求都会被ribbon拦截，Ribbon脱离Eureka使用，配置Ribbon能访问 的微服务节点，多个节点用逗号隔开

配置如下：

user:
      ribbon:
        eureka:
          enabled: false
        listOfServers: dev.earth.xpaas.baidu.com
    
    #Ribbon脱离Eureka使用
    ribbon:
      eureka:
       enabled: false
    
    #配置Ribbon能访问 的微服务节点，多个节点用逗号隔开
    user:
      ribbon:
        listOfServers: dev.earth.xpaas.baidu.com