title: Recursive ajax() requests
body: <p>I use jQuery's <code>ajax()</code>to get information. I call the method when the request is successful. Here is the code:</p>
  
  <pre><code>function recursively_ajax(){
      console.warn("begin");
      $.ajax({
          type:"GET",
          url: "./JvmInfoClass",
          success: function(data){
              console.warn("get jvm info success");
              recursively_ajax();
          }
      });
  }
  
  recursively_ajax();
  </code></pre>
  
  <p>I make the thread sleep 3 seconds in the back-end. But the console print the message continuously not after 3 seconds. Why is this?</p>