Common problem areas for web administrators

Web administrators always find issues with applications, not due to server failure of the Tomcat server, but because applications start malfunctioning due to other components as well. The following figure shows different components for a typical middleware environment:

Let's briefly discuss the issues encountered by web administrators in real-time production support:

• Application: These issues occur when an application doesn't work correctly due to reasons such as class loader conflicts, application deployment conflicts, configuration parameters missing, and so on.

• Database: Database issues are very critical for the web administrator. It is very difficult to find the issues related to the DB. Some of them are; JNDI not found, broken pipe errors, and so on.

• User Access: Access issues can occur due to database or application mis-configuration. Some examples of these issues are; users are not able to access the application, login page doesn't...