public String getServerAddr() {
		return serverAddr;
	}
A {@code NacosConnectionFailureException} is thrown when the application fails to
connect to Nacos Server.

@author juven.xuxb
spring-cloud-alibaba-starters/spring-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/diagnostics/analyzer/NacosConnectionFailureException.java