两个服务一个服务提供者A，另一个服务提供者B同时调用服务A，在阿里云ECS上启动nacos，部署A正常注册服务，当部署B应用时会报错，然后nacos服务停止了。是怎么回事
报错信息如下：
com.alibaba.nacos.api.exception.NacosException: failed to req API:/api//nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:496) ~[nacos-client-1.2.1.jar!/:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:401) ~[nacos-client-1.2.1.jar!/:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:397) ~[nacos-client-1.2.1.jar!/:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:212) ~[nacos-client-1.2.1.jar!/:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:207) ~[nacos-client-1.2.1.jar!/:na]
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:64) ~[spring-cloud-starter-alibaba-nacos-discovery-2.2.1.RELEASE.jar!/:2.2.1.RELEASE]
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry$$FastClassBySpringCGLIB$$ca3a8dbd.invoke(<generated>) [spring-cloud-starter-alibaba-nacos-discovery-2.2.1.RELEASE.jar!/:2.2.1.RELEASE]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) [spring-core-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:47) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689) [spring-aop-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry$$EnhancerBySpringCGLIB$$87d69c67.register(<generated>) [spring-cloud-starter-alibaba-nacos-discovery-2.2.1.RELEASE.jar!/:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239) [spring-cloud-commons-2.2.2.RELEASE.jar!/:2.2.2.RELEASE]
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:76) [spring-cloud-starter-alibaba-nacos-discovery-2.2.1.RELEASE.jar!/:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138) [spring-cloud-commons-2.2.2.RELEASE.jar!/:2.2.2.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101) [spring-cloud-commons-2.2.2.RELEASE.jar!/:2.2.2.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88) [spring-cloud-commons-2.2.2.RELEASE.jar!/:2.2.2.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) [spring-cloud-commons-2.2.2.RELEASE.jar!/:2.2.2.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) [spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) [spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) [spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) [spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:165) [spring-boot-2.2.3.RELEASE.jar!/:2.2.3.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.2.3.RELEASE.jar!/:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.3.RELEASE.jar!/:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.3.RELEASE.jar!/:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.3.RELEASE.jar!/:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.3.RELEASE.jar!/:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.3.RELEASE.jar!/:2.2.3.RELEASE]
	at com.bigshot.post.provider.PostServiceProviderApplication.main(PostServiceProviderApplication.java:14) [classes!/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_271]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_271]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_271]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_271]
	at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) [post-service-provider.jar:na]
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:107) [post-service-provider.jar:na]
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) [post-service-provider.jar:na]
	at org.springframework.boot.loader.PropertiesLauncher.main(PropertiesLauncher.java:467) [post-service-provider.jar:na]

2021-01-18 16:13:46.907  INFO 24050 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2021-01-18 16:13:46.912  WARN 24050 --- [           main] o.a.c.loader.WebappClassLoaderBase       : The web application [ROOT] appears to have started a thread named [logback-1] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 sun.misc.Unsafe.park(Native Method)
 java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
 java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
 java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
 java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 java.lang.Thread.run(Thread.java:748)
2021-01-18 16:13:46.913  WARN 24050 --- [           main] o.a.c.loader.WebappClassLoaderBase       : The web application [ROOT] appears to have started a thread named [com.alibaba.nacos.naming.client.listener] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 sun.misc.Unsafe.park(Native Method)
 java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
 java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467)
 com.alibaba.nacos.client.naming.core.EventDispatcher$Notifier.run(EventDispatcher.java:118)
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 java.lang.Thread.run(Thread.java:748)
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