1：报错提示提示一直通过127.0.0.1这个本地IP连接nacos，具体报错如下

Connected to the target VM, address: '127.0.0.1:2678', transport: 'socket'

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::               (v2.7.18)

2024-10-04 18:09:18.776 ERROR 17912 --- [           main] com.alibaba.nacos.common.remote.client   : Send request fail, request = ConfigQueryRequest{headers={charset=UTF-8, Client-AppName=unknown, Client-RequestToken=c3bb19da656bf24e917561f4874ea436, Client-RequestTS=1728036558664, exConfigInfo=true, notify=false, Timestamp=1728036558664}, requestId='null'}, retryTimes = 0, errorMessage = Client not connected, current status:STARTING
2024-10-04 18:09:18.887 ERROR 17912 --- [           main] com.alibaba.nacos.common.remote.client   : Send request fail, request = ConfigQueryRequest{headers={charset=UTF-8, Client-AppName=unknown, Client-RequestToken=c3bb19da656bf24e917561f4874ea436, Client-RequestTS=1728036558664, exConfigInfo=true, notify=false, Timestamp=1728036558664}, requestId='null'}, retryTimes = 1, errorMessage = Client not connected, current status:STARTING
2024-10-04 18:09:18.939 ERROR 17912 --- [t.remote.worker] c.a.n.c.remote.client.grpc.GrpcClient    : Server check fail, please check server 127.0.0.1 ,port 9848 is available , error ={}

java.util.concurrent.ExecutionException: com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
	at com.alibaba.nacos.shaded.com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:566) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:445) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.common.remote.client.grpc.GrpcClient.serverCheck(GrpcClient.java:148) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.common.remote.client.grpc.GrpcClient.connectToServer(GrpcClient.java:264) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.common.remote.client.RpcClient.reconnect(RpcClient.java:522) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.common.remote.client.RpcClient.lambda$start$2(RpcClient.java:370) ~[nacos-client-2.0.4.jar:na]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
Caused by: com.alibaba.nacos.shaded.io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
	at com.alibaba.nacos.shaded.io.grpc.Status.asRuntimeException(Status.java:533) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:490) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1$1.onClose(CensusStatsModule.java:700) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.CensusTracingModule$TracingClientInterceptor$1$1.onClose(CensusTracingModule.java:399) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:510) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:66) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:630) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$700(ClientCallImpl.java:518) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:692) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:681) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123) ~[nacos-client-2.0.4.jar:na]
	... 3 common frames omitted
Caused by: com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: getsockopt: /127.0.0.1:9848
Caused by: java.net.ConnectException: Connection refused: getsockopt
	at java.base/sun.nio.ch.Net.pollConnect(Native Method) ~[na:na]
	at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:682) ~[na:na]
	at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:973) ~[na:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:336) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[nacos-client-2.0.4.jar:na]
	at com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[nacos-client-2.0.4.jar:na]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]

2024-10-04 18:09:18.939  INFO 17912 --- [t.remote.worker] com.alibaba.nacos.common.remote.client   : [72ec5d41-3620-4022-8895-c11021e01f3a_config-0] Fail to connect server, after trying 3 times, last try server is {serverIp = '127.0.0.1', server main port = 8848}, error = unknown
2024-10-04 18:09:18.998 ERROR 17912 --- [           main] com.alibaba.nacos.common.remote.client   : Send request fail, request = ConfigQueryRequest{headers={charset=UTF-8, Client-AppName=unknown, Client-RequestToken=c3bb19da656bf24e917561f4874ea436, Client-RequestTS=1728036558664, exConfigInfo=true, notify=false, Timestamp=1728036558664}, requestId='null'}, retryTimes = 2, errorMessage = Client not connected, current status:STARTING
2024-10-04 18:09:18.998  WARN 17912 --- [           main] c.a.c.n.c.NacosPropertySourceBuilder     : Ignore the empty nacos configuration and get it based on dataId[small-contractor] & group[DEFAULT_GROUP]
2024-10-04 18:09:19.108 ERROR 17912 --- [           main] com.alibaba.nacos.common.remote.client   : Send request fail, request = ConfigQueryRequest{headers={charset=UTF-8, Client-AppName=unknown, Client-RequestToken=27691c8c6e879b5a5f2a01a367989391, Client-RequestTS=1728036558998, exConfigInfo=true, notify=false, Timestamp=1728036558998}, requestId='null'}, retryTimes = 0, errorMessage = Client not connected, current status:STARTING
2024-10-04 18:09:19.220 ERROR 17912 --- [           main] com.alibaba.nacos.common.remote.client   : Send request fail, request = ConfigQueryRequest{headers={charset=UTF-8, Client-AppName=unknown, Client-RequestToken=27691c8c6e879b5a5f2a01a367989391, Client-RequestTS=1728036558998, exConfigInfo=true, notify=false, Timestamp=1728036558998}, requestId='null'}, retryTimes = 1, errorMessage = Client not connected, current status:STARTING
2024-10-04 18:09:19.331 ERROR 17912 --- [           main] com.alibaba.nacos.common.remote.client   : Send request fail, request = ConfigQueryRequest{headers={charset=UTF-8, Client-AppName=unknown, Client-RequestToken=27691c8c6e879b5a5f2a01a367989391, Client-RequestTS=1728036558998, exConfigInfo=true, notify=false, Timestamp=1728036558998}, requestId='null'}, retryTimes = 2, errorMessage = Client not connected, current status:STARTING
2024-10-04 18:09:19.331  WARN 17912 --- [           main] c.a.c.n.c.NacosPropertySourceBuilder     : Ignore the empty nacos configuration and get it based on dataId[small-contractor.properties] & group[DEFAULT_GROUP]
2024-10-04 18:09:19.332  INFO 17912 --- [           main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-small-contractor.properties,DEFAULT_GROUP'}, BootstrapPropertySource {name='bootstrapProperties-small-contractor,DEFAULT_GROUP'}]
2024-10-04 18:09:19.336  INFO 17912 --- [           main] c.hdx.contractor.ContractorApplication   : No active profile set, falling back to 1 default profile: "default"
2024-10-04 18:09:19.344  WARN 17912 --- [           main] c.a.c.n.c.NacosConfigDataLoader          : [Nacos Config] config[dataId=small-contractor.yaml, group=DEFAULT_GROUP] is empty
2024-10-04 18:09:19.349 ERROR 17912 --- [t.remote.worker] c.a.n.c.remote.client.grpc.GrpcClient    : Server check fail, please check server 127.0.0.1 ,port 9848 is available , error ={}

1-1根据具体问题分析，为什么没有使用到自己的配置文件，查看自己的配置文件是否正确，这是我的application.yml配置文件

server:
  port: 8089
spring:
  main:
    allow-bean-definition-overriding: true
  application:
    name: small-contractor
  cloud:
    nacos:
      discovery:
        namespace: yd-energy
        server-addr: 192.168.39.18:8848
        ip: 192.168.11.50

      config:
        server-addr: 192.168.39.18:8848
        namespace: yd-energy
  config:
    import:
      - optional:nacos:small-contractor.yaml

1-2：这个问题一直分析源码追踪了很久，发现代码自己默认先执行127.0.0.1，在cloud自带的配置类NacosConfigProperties，先执行如下代码

1-3：接着再执行配置的ip

2：我这个项目最根本的原因pom文件是使用如下依赖，这个依赖的作用是，启动时会加载 bootstrap.properties 或 bootstrap.yml 文件。它们在应用的主配置文件（application.properties 或 application.yml）之前加载。所以造成了一些默认的配置先执行一次，，遇到一些默认配置执行的时候，如果异常服务会退出的现象，如果服务不退出，有一些配置又在我的application.yml中生效，例如设置的端口8089

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

2-1：解决方法一：将application.yml修改成bootstrap.yml

2-2：解决方法二：注释spring-cloud-starter-bootstrap依赖，修改如下

<!--        <dependency>-->
<!--            <groupId>io.hdx</groupId>-->
<!--            <artifactId>yd-common</artifactId>-->
<!--            <version>5.3.0</version>-->
<!--        </dependency>-->

3：注意事项，如果连接不上nacos都是读取不了里面的配置文件，如下报的错误也是没链接上nacos

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).