This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
The code would run, but the Servlet wouldn't actually be taken out of service. The destroy method is a method like any other method, but its purpose has to do with the lifecycle of the Servlet, which is managed by the web container.
A developer should never call the init or destroy method of a Servlet. We just put pertinent code there, and allow the container to invoke it.