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.
When creating additional Threads in any servlet container you need to think carefully about the implications of servicing many requests. Creating a new Thread for every request is probably a very bad idea.
Back up a bit and define what timing functions you need to have, then maybe you can get suggestions as to how to implement the functions.