Param ‘serviceName‘ is illegal, serviceName is blank --------报错

报错内容为：java.lang.IllegalArgumentException: Param ‘serviceName’ is illegal, serviceName is blank

报错原因：SpringBoot2.4版本之后不会默认加载bootstrap.yaml

解决方案一：设置：spring.cloud.bootstrap.enabled=true

解决方案二：添加依赖

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