This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
It is up to the servlet container to create and manage HttpServletRequest and response objects. If the container wants to use a pool of request objects instead of creating new ones for each request, that is OK. Presumably it provides for clearing the old data before reuse. Bill