@Bean
		@ConditionalOnBean(ReactiveDiscoveryClient.class)
		@ConditionalOnMissingBean
		@ConditionalOnProperty(value = "spring.cloud.loadbalancer.configurations", havingValue = "zone-preference")
		public ServiceInstanceListSupplier zonePreferenceDiscoveryClientServiceInstanceListSupplier(
				ConfigurableApplicationContext context) {
			return ServiceInstanceListSupplier.builder().withDiscoveryClient()
					.withZonePreference().build(context);
		}
{@link ServiceInstanceListSupplier} don't use cache.<br>
<br>
1. LoadBalancerCache causes information such as the weight of the service instance to
be changed without immediate effect.<br>
2. Nacos itself supports caching.

@author XuDaojie
@since 2021.1
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/loadbalancer/NacosLoadBalancerClientConfiguration.java