When using Servlet 3.0 web modules, keep in mind the following features.
Java Servlet 3.0 annotations are picked up in Servlet 2.5 web modules, which can include exposing a servlet on the web. Use caution when upgrading prerequisites of an older application, because the new annotations are processed and the prerequisites JAR file might include annotations that you do not want applied.
You can change the value of the javax.servlet.context.tempdir servlet context attribute to be relative to a different directory by setting the com.ibm.websphere.servlet.temp.dir system property. This system property affects all applications on a server-wide basis. For example, if you set com.ibm.websphere.servlet.temp.dir to /foo, the application temp directory is /foo/node1/server1/fragmentTest/fragmentTest24.war. If you want to change the value at an application level, use the scratchdir JavaServer Pages (JSP) attribute. View the JSP engine configuration parameters topic for more information about the scratchdir attribute.