springboot版本：
2.0.1.RELEASEspringcloud版本：
Finchley.RELEASE
日志：
2018-07-15 10:50:10.516 INFO 16952 --- [ main] c.x.springcloud.EurekaClientApplication : Started EurekaClientApplication in 8.884 seconds (JVM running for 10.459)
2018-07-15 10:50:10.522 INFO 16952 --- [ Thread-23] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@4278284b: startup date [Sun Jul 15 10:50:05 CST 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@6c80d78a
2018-07-15 10:50:10.522 INFO 16952 --- [ Thread-23] o.s.c.n.e.s.EurekaServiceRegistry : Unregistering application eureka-client1 with eureka with status DOWN
2018-07-15 10:50:10.523 WARN 16952 --- [ Thread-23] com.netflix.discovery.DiscoveryClient : Saw local status change event StatusChangeEvent [timestamp=1531623010523, current=DOWN, previous=UP]
2018-07-15 10:50:10.524 INFO 16952 --- [ Thread-23] o.s.c.support.DefaultLifecycleProcessor : Stopping beans in phase 0
2018-07-15 10:50:10.526 INFO 16952 --- [ Thread-23] com.netflix.discovery.DiscoveryClient : Shutting down DiscoveryClient ...
2018-07-15 10:50:10.542 INFO 16952 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA-CLIENT1/localhost:eureka-client1:8080 - registration status: 204
2018-07-15 10:50:10.543 INFO 16952 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA-CLIENT1/localhost:eureka-client1:8080: registering service...
2018-07-15 10:50:10.547 INFO 16952 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA-CLIENT1/localhost:eureka-client1:8080 - registration status: 204
2018-07-15 10:50:10.548 INFO 16952 --- [ Thread-23] com.netflix.discovery.DiscoveryClient : Unregistering ...
2018-07-15 10:50:10.553 INFO 16952 --- [ Thread-23] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA-CLIENT1/localhost:eureka-client1:8080 - deregister status: 200
2018-07-15 10:50:10.564 INFO 16952 --- [ Thread-23] com.netflix.discovery.DiscoveryClient : Completed shut down of DiscoveryClient
2018-07-15 10:50:10.565 INFO 16952 --- [ Thread-23] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
2018-07-15 10:50:10.565 INFO 16952 --- [ Thread-23] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans
Process finished with exit code 0在eureka-client中加入web包后解决
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>我理解的是不用web包只是一个java程序，所以运行后就停止了。具体原理，希望大家研究出来回复一下。