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.
I have a web application where at times, users will "see each other's sessions". The only thing that seems possible is that the instances of actions I have defined are being shared by multiple users, even though I have given each scope="prototype". Here is a sample action: