Question

I have a web app that runs perfectly on Apache Tomcat. However, when I deploy it to WebLogic 10.2.3 server, it gets a NPE due to the session being null.

The app is Java 5, jQuery 1.7.1 running on Win 7 Pro. The first Ajax GET to the server causes some values to be stored in the session object. The next Ajax GET uses these values – thus the NPE due to null session.

In Firebug, I see that different session IDs are being passed – why?

Can anyone help me resolve this?

Another piece of information. Here’s some related jQuery:

    $.ajaxSetup ({
    cache: false,
    xhrFields: {
        withCredentials: true
     },
     crossDomain: true
});

and:

    $('#findSites').click(function() {                                // Locate HTML DOM element with ID "somebutton" and assign the following function to its "click" event...
    searchVal = document.getElementById("searchFor").value;
    searchTyp = document.getElementById("searchType").value;
    $.get('SiteSearchServlet', {searchFor: searchVal, searchType: searchTyp}, function(responseJson) { // Execute Ajax GET request on URL of "someservlet" and execute the following function with Ajax response JSON...
...

Answer 1

Turns out that adding this to the document ready function solved the problem (i.e. now I use the same session unless timeout):

    jQuery.support.cors = true; // force cross-site scripting

Hope this helps someone else.
Mark