Uncaught exception with 'DB connection error' on line 18

jQuery.post() function fail

After installing a newer jquery version the jQuery.post() failed. The documentation says not to use the deprecated  jqXHR.success(), jqXHR.error(), and jqXHR.complete()callback methods. As of jQuery 1.8 prepare the code with jqXHR.done(), jqXHR.fail(), and jqXHR.always()instead.

But on every post action the callback fail was called, the request send to the url was working fine.

function doPostSomething(key, val) {
var req = $.post("url/something", { key: key, value: val }, "json");
req.fail(function() { alert("There is an error\n" + status); });
req.done(function() {
doSomeStuff() ;

The reason why jquery handles it as an error is I post something without requesting data. I just store something in a database (key, val).

The url serves a tomcat application with the following response status code in a servlet:

if (productsDAO.getResult() != null) {
response.sendError(460, productsDAO.getResult());
} else {
// response.setStatus(HttpServletResponse.SC_OK);

Changing the response status code to SC_NO_CONTENT will work.