java.net.ConnectException: [NACOS HTTP-POST] The maximum number of tolerable server reconnection err

java.net.ConnectException: [NACOS HTTP-POST] The maximum number of tolerable server reconnection errors has been reached
	at com.alibaba.nacos.client.config.http.ServerHttpAgent.httpPost(ServerHttpAgent.java:181) ~[nacos-client-1.4.1.jar:na]
	at com.alibaba.nacos.client.config.http.MetricsHttpAgent.httpPost(MetricsHttpAgent.java:68) ~[nacos-client-1.4.1.jar:na]
	at com.alibaba.nacos.client.config.impl.ClientWorker.checkUpdateConfigStr(ClientWorker.java:441) ~[nacos-client-1.4.1.jar:na]
	at com.alibaba.nacos.client.config.impl.ClientWorker.checkUpdateDataIds(ClientWorker.java:408) ~[nacos-client-1.4.1.jar:na]
	at com.alibaba.nacos.client.config.impl.ClientWorker$LongPollingRunnable.run(ClientWorker.java:596) ~[nacos-client-1.4.1.jar:na]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_181]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_181]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_181]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_181]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]

出现此错误的原因是我在项目的pom文件依赖了nacos-config，但是有没有创建一个boostrap的文件

解决的办法有两种。
一种是将依赖给注释掉

另一种是创建一个boostrap.yml的文件

bootstrap.yml也是用来加载配置文件的
applicaiton.yml是用户级的资源配置项
bootstrap.yml是系统级的，优先级更加高

Spring Cloud会创建一个“Bootstrap Context”，作为Spring应用的Application Context的父上下文。初始化的时候，Bootstrap Context负责从外部源加载配置属性并解析配置。这两个上下文共享一个从外部获取的Environment。
Bootstrap属性有高优先级，默认情况下，它们不会被本地配置覆盖。 Bootstrap context和Application Context有着不同的约定，所以新增了一个bootstrap.yml文件，保证Bootstrap Context和Application Context配置的分离。