session not stored

[kz kz]

When running the following code, a new session is generated every time
in development mode and when hosted in App Engine. When I try the code
in Tomcat, it works fine. Why isn't the code working correctly?

response.setContentType("text/html");
PrintWriter out = response.getWriter();
HttpSession session = request.getSession(true);

if (session.isNew()) {
out.println("New session");
} else {
out.println("Old Session");
}

[Simon Knott]

Hi,

Have you enabled sessions, through your app config file?  https://developers.google.com/appengine/docs/java/config/appconfig#Enabling_Sessions

Cheers,

Simon