Tomcat Failed to start component
问题 I am trying to learn Spring, but I don't understand Tomcat logs. Here is the log that I am getting. I tried to search here but unfortunately most people suggested that web.xml might have a typo, but unfortunately counldn't find anything. INFO: Starting Servlet Engine: Apache Tomcat/8.5.16 Jan 08, 2018 11:45:25 AM org.apache.catalina.core.ContainerBase startInternal SEVERE: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: