2019-12-26 at 14:40:31 CST [main] INFO org.apache.coyote.http11.Http11NioProtocol - Initializing ProtocolHandler ["http-nio-8887"] 2019-12-26 at 14:40:31 CST [main] INFO org.apache.catalina.core.StandardService - Starting service [Tomcat] 2019-12-26 at 14:40:31 CST [main] INFO org.apache.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.21] 2019-12-26 at 14:40:32 CST [main] INFO org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/] - Initializing Spring embedded WebApplicationContext 2019-12-26 at 14:40:33 CST [main] INFO org.apache.catalina.core.StandardService - Stopping service [Tomcat] 2019-12-26 at 14:40:33 CST [main] WARN org.apache.catalina.loader.WebappClassLoaderBase - The web application [ROOT] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: java.lang.Object.wait(Native Method) java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:142) com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)