You deploy a WAR module as described in Tools for Deployment. If you do not specify a context root, the default is the name of the WAR file without the extension.
If a web application accesses a DataSource that is not specified in a resource-ref in sun-web.xml, or there is no sun-web.xml file, the resource-ref-name defined in web.xml is used. A warning message is logged recording the JNDI name used to look up the resource.
You can precompile JSP files during deployment by checking the appropriate box in the Admin Console, or by using the --precompilejsp option of the asadmin deploy or asadmin deploydir command. The asant tasks sun-appserv-deploy and sun-appserv-jspc also allow you to precompile JSP files. For more information, see Chapter 3, The asant Utility, in Sun Java System Application Server 9.1 Developer’s Guide.
You can keep the generated source for JSP files by adding the -keepgenerated flag to the jsp-config element in sun-web.xml. If you include this property when you deploy the WAR module, the generated source is kept in domain-dir/generated/jsp/j2ee-apps/app-name/module-name, if it is in an application, or domain-dir/generated/jsp/j2ee-modules/module-name, if it is in an individually deployed web module.
For more information about JSP precompilation, see jsp-config and Options for Compiling JSP Files in Sun Java System Application Server 9.1 Developer’s Guide.
HTTP sessions in WAR modules can be saved in a persistent store in case a server instance fails. For more information, see Distributed Sessions and Persistence in Sun Java System Application Server 9.1 Developer’s Guide and the Sun Java System Application Server 9.1 High Availability Administration Guide.
After a web application is undeployed, its HttpSession information is not immediately removed if sessions are persistent. HttpSession information is removed in the subsequent cycle, when timed out sessions are removed. Therefore, you should disable a web application before undeploying it if sessions are persistent.
Web module context roots must be unique within a server instance.
See the Sun Java System Application Server 9.1 High Availability Administration Guide for information about load balancing.