This Web Server update release introduces the ability to display the exception stack trace or JSP compiler errors in a browser. In the earlier releases of Web Server, when an exception occurs in the servlet container at the request time, a "Server Error" is displayed at the client without exposing internal application details. The exception is always logged in the error log with or without this feature enabled.
Displaying exception stack trace or JSP compiler errors in a browser feature is not enabled by default. You can enable this feature through set-servlet-container-prop command or through the Display Exception checkbox in the Servlet Container tab of the Admin Console. This is useful for development purposes. It is strongly recommended not to enable this feature in production systems.