Caused by: java.lang.IllegalStateException: No Feign Client for loadBalancing defined.

Caused by: java.lang.IllegalStateException: No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-netflix-ribbon?報錯

可能在使用SpringCloud中使用了一下eureka的依賴，由於以下依賴不包含ribbon的負載均衡的配置。

  <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
        </dependency>

應使用一下的依賴：

<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>

問題解決！