EAServer uses custom Java class loaders to allow refreshing the Web application classes and Java components, and to load classes from directories and JAR files that are not specified in the CLASSPATH environment variable. During the development cycle, this feature allows you to add or modify classes without restarting the server. However, duplicates in the custom class list for different components can waste memory by loading duplicate class instances. Chapter 10, “Configuring Java Class Loaders,” in the System Administration Guide describes how to configure common class lists for components and Web applications.