集成OpenFeign启动失败-蒲公英云

集成OpenFeign启动失败

小灰灰 2022-11-05 15:53 243阅读 0赞

使用open feign开发接口，直接启动失败，抛出如下异常：

nested exception is java.lang.IllegalStateException: No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalancer?

问题很显然是没有添加 spring-cloud-starter-loadbalancer,所以在pom.xml中添加如下依赖：

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

重新导入依赖之后，启动成功，但是调用接口依旧报错：

java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud/client/ServiceInstance;

这是因为spring cloud将负载均衡组件从ribbon替换成了loadbalancer，需要在spring-cloud-starter-alibaba-nacos-discovery排除ribbon组件，否则loadbalancer是不生效的。

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        </exclusion>
    </exclusions>
</dependency>