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.
Context Attributes are not thread safe. You can make Context Attributes thread safe if you synchronize on ServletContext object. Context Attributes will be thread safe if all servlets accessing context attributes are synchronized. Check yourself by synchronize context object in one servlet and in another servlet dont synchronize context object and see result.