Create an empty file named .reload at the root of the deployed module.
where vs_id is the virtual server ID in which the web application is deployed, and uri is the value of the uri attribute of the webapp/ element.
Type touch .reload to explicitly update the .reload file's timestamp each time you make the above changes.
For JSPs, changes are reloaded automatically at a frequency set in the reload-interval property of the jsp-config element in the sun-web.xml file. To disable dynamic reloading of JSPs, set the reload-interval property to -1.