Restart a deployed, running Web application so that the application can pick up changes to its classes or libraries.
To use this action, the Tomcat manager (manager.war) must be deployed on the instance and the instance must be running. You can deploy manager.war from $CATALINA_HOME/extras.
Note: The reload action does not reload the web application's web.xml file. To begin using changes to web.xml, you must stop and restart the web application.