停掉前的日志信息如下：

2017-12-26 15:12:10.857  INFO 10878 --- [       Thread-3] ationConfigEmbeddedWebApplicationContext : Closing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@64a294a6: startup date [Tue Dec 26 14:53:02 CST 2017]; root of context hierarchy
2017-12-26 15:12:10.860  INFO 10878 --- [       Thread-3] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
2017-12-26 15:12:10.867  INFO 10878 --- [       Thread-3] org.mongodb.driver.connection            : Closed connection [connectionId{localValue:2, serverValue:26574}] to 120.25.224.11:28888 because the pool has been closed.

我用了mongodb和redis数据库，内置的tomcat
请问是什么原因呢？应该怎么解决啊？
谢谢了