In a jQuery AJAX post, is it possible that the data payload is not sent?

Question

I have a problem where sometimes the data payload in the AJAX code below is not sent to the server.

// loans_url, sample_id, sample defined above this block
$.ajax({
  type:       "POST",
  url:        loans_url,
  data:       {'loan[sample_id]':sample_id},
  beforeSend: function()     { sample.remove(); },
  success:    function(data) { $('#basket table tr:last').after(data); },
  error:      function()     { $('#results').prepend("Apologetic error message..."); }
});

"Good" post sends data that looks like this: loan[sample_id]: 1234. A "bad" message hits the correct URL, but does not send any data.

I cannot reproduce this in development, but it happens about once a day in production. In Firebug, I tried to sabotage the markup on the page from which sample_id was obtained, but it just caused a submission loan[sample_id]: undefined, which is not the problem I am facing.

Is there any way to transfer payload data at all? Can you suggest how I can debug this further? (All this with jQuery 1.3.2.)

Answer 1

error jquery ajax- - (, ajax ?). , - . , - (, cookie) ( , , , ).

Answer 2

- , , , "" - , - .

, , . , - . , - , .