gateway先启动其他微服务，在启动网关，网关启动不了，且无异常日志；先启动网关，所有服务能正常启动

升级spring boot到2.7.0，gateway先启动其他微服务，在启动网关，网关启动不了，但是网关也没有任何异常日志，仅仅是一直等待状态，查看nacos服务未正常注册；先启动网关，所有服务能正常启动，产看nacos服务，所有服务能正常注册。
最终发现是Feign导致，Spring Cloud Gateway使用OpenFeign卡死，启动不了。当在gateway网关中使用Feign时，就会导致gateway网关启动一直卡着，然而也不报错。

日志无异常情况，详细日志如下：

 :: Spring Boot ::                (v2.7.0)

2022-06-04 20:41:37.627  INFO 28144 --- [           main] c.a.n.c.c.impl.LocalConfigInfoProcessor  : LOCAL_SNAPSHOT_PATH:/Users/carter/nacos/config
2022-06-04 20:41:37.644  INFO 28144 --- [           main] c.a.nacos.client.config.impl.Limiter     : limitTime:5.0
2022-06-04 20:41:37.712  INFO 28144 --- [           main] c.a.nacos.client.config.utils.JvmUtil    : isMultiInstance:false
2022-06-04 20:41:37.731  WARN 28144 --- [           main] c.a.c.n.c.NacosPropertySourceBuilder     : Ignore the empty nacos configuration and get it based on dataId[gateway] & group[DEFAULT_GROUP]
2022-06-04 20:41:37.757  WARN 28144 --- [           main] c.a.c.n.c.NacosPropertySourceBuilder     : Ignore the empty nacos configuration and get it based on dataId[gateway.yml] & group[DEFAULT_GROUP]
2022-06-04 20:41:37.758  INFO 28144 --- [           main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-gateway.yml,DEFAULT_GROUP'}, BootstrapPropertySource {name='bootstrapProperties-gateway,DEFAULT_GROUP'}, BootstrapPropertySource {name='bootstrapProperties-allows.yaml,DEFAULT_GROUP'}]
2022-06-04 20:41:37.764  INFO 28144 --- [           main] com.cloud.gateway.GatewayApplication     : No active profile set, falling back to 1 default profile: "default"
2022-06-04 20:41:38.210  INFO 28144 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2022-06-04 20:41:38.211  INFO 28144 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode.
2022-06-04 20:41:38.225  INFO 28144 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 5 ms. Found 0 Redis repository interfaces.
2022-06-04 20:41:38.346  INFO 28144 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=d6da96dc-ee00-3f1d-b951-2210fa3441c0
2022-06-04 20:41:38.356  INFO 28144 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'validatorConfiguration' of type [com.common.exception.validation.ValidatorConfiguration$$EnhancerBySpringCGLIB$$8078cc58] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2022-06-04 20:41:38.370  INFO 28144 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'validator' of type [org.hibernate.validator.internal.engine.ValidatorImpl] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2022-06-04 20:41:38.465  INFO 28144 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.client.loadbalancer.reactive.LoadBalancerBeanPostProcessorAutoConfiguration' of type [org.springframework.cloud.client.loadbalancer.reactive.LoadBalancerBeanPostProcessorAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2022-06-04 20:41:38.467  INFO 28144 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.client.loadbalancer.reactive.LoadBalancerBeanPostProcessorAutoConfiguration$ReactorDeferringLoadBalancerFilterConfig' of type [org.springframework.cloud.client.loadbalancer.reactive.LoadBalancerBeanPostProcessorAutoConfiguration$ReactorDeferringLoadBalancerFilterConfig] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2022-06-04 20:41:38.470  INFO 28144 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'reactorDeferringLoadBalancerExchangeFilterFunction' of type [org.springframework.cloud.client.loadbalancer.reactive.DeferringLoadBalancerExchangeFilterFunction] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [After]
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Before]
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Between]
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Cookie]
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Header]
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Host]
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Method]
2022-06-04 20:41:39.656  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Path]
2022-06-04 20:41:39.657  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Query]
2022-06-04 20:41:39.657  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [ReadBody]
2022-06-04 20:41:39.657  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [RemoteAddr]
2022-06-04 20:41:39.657  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [XForwardedRemoteAddr]
2022-06-04 20:41:39.657  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Weight]
2022-06-04 20:41:39.657  INFO 28144 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [CloudFoundryRouteService]
2022-06-04 20:41:39.699  INFO 28144 --- [oundedElastic-1] com.alibaba.nacos.client.naming          : initializer namespace from System Property :null
2022-06-04 20:41:39.699  INFO 28144 --- [oundedElastic-1] com.alibaba.nacos.client.naming          : initializer namespace from System Environment :null
2022-06-04 20:41:39.699  INFO 28144 --- [oundedElastic-1] com.alibaba.nacos.client.naming          : initializer namespace from System Property :null
2022-06-04 20:41:39.842  INFO 28144 --- [oundedElastic-3] com.alibaba.nacos.client.naming          : new ips(1) service: [email protected]@user-center -> [{"instanceId":"192.168.1.108#9002#DEFAULT#[email protected]@user-center","ip":"192.168.1.108","port":9002,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"[email protected]@user-center","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ipDeleteTimeout":30000}]
2022-06-04 20:41:39.847  INFO 28144 --- [oundedElastic-3] com.alibaba.nacos.client.naming          : current ips:(1) service: [email protected]@user-center -> [{"instanceId":"192.168.1.108#9002#DEFAULT#[email protected]@user-center","ip":"192.168.1.108","port":9002,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"[email protected]@user-center","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ipDeleteTimeout":30000}]
2022-06-04 20:43:43.034  WARN 28144 --- [.naming.updater] com.alibaba.nacos.client.naming          : out of date data received, old-t: 1654346563261, new-t: 0

日志图片：

解决方案：
1.修改配置

	由于配置了spring.cloud.gateway.discovery.locator.enabled = true导致，改为false或者去掉该配置，因为默认为false，但是该方案会导致动态路由不能加载，影响微服务调用。
    gateway:
      discovery:
        locator:
          enabled: false          

2.feign注入使用懒加载方式

    // 关键：这里必须使用@Lazy
    @Lazy
    @Autowired
    private Oauth2Client oauth2Client;

相关大数据学习demo地址:
https://github.com/carteryh/big-data