Why my post request is pending?

I have code a request, similar to others in the code, but it pends and I don't understand why.

Here is the code in the controller :

  $scope.addScroll = function(){
    InternDataProvider.addScroll(globalCtrl.unscrolled)
            .then(function(reports) {
                console.log("Changes saved");
                globalCtrl.scrollmessage="Combinaison "+globalCtrl.unscrolled.media+"/"+globalCtrl.unscrolled.platoform+" ajoutée.";
                globalCtrl.scrollmessageerr="";
                }).catch(function(err) {
                  console.error('Unable to fetch forecast report: ' + err);
        });
  };

The code in the factory part :

internDataProvider.addScroll = function(uscr)
{
    var httpParams = {
            unscrolled: uscr
    };


    return $http.post(addScroll, {
        params : httpParams,
        }).then(function(response){
            console.log("Successful: response from submitting data to server was: " + response);

            }).catch(function(err){
            console.log(err.statusCode);
    });

};

And the code in the node.js part :

//Add a combination of media or platform to the scroll
function addScroll(res, queryParams)
{
    var int1 = listMedias.indexOf(queryParams.unscrolled.media) +1;
    var int2 = listPlatforms.indexOf(queryParams.unscrolled.platform);
    connection.query("UPDATE safeplusdb.scroll SET isscrolled="+true+" WHERE idm="+int1+" AND vector_id="+int2+";", function(err, records) {
              if(err) throw err;
              console.log("UPDATE safeplusdb.scroll SET isscrolled="+true+" WHERE idm="+int1+" AND vector_id="+int2+";");
      connection.query("SELECT * FROM safeplusdb.scroll;", function (err, records){
              if(err) throw err;

              for(i=0; i<records.length; i++)
              {
                var record= records[i];
                indj=indk=0;
                if(record.isscrolled==false)
                {
                  if(record.idm==null && record.vector_id !=null)
                  {
                    listUnScroll[indj] = {media : null, platform : null};
                    listUnScroll[indj].media = null;
                    listUnScroll[indj].platform = listPlatforms[record.vector_id]; 
                    indj++;
                  }
                  else if(record.vector_id==null && record.idm!=null)
                  {
                    listUnScroll[indj] = {media : null, platform : null};
                    listUnScroll[indj].platform = null;
                    listUnScroll[indj].media = listMedias[record.idm-1];
                    indj++;
                  }
                  else
                  {
                    listUnScroll[indj] = {media : null, platform : null};
                    listUnScroll[indj].media = listMedias[record.idm-1];
                    listUnScroll[indj].platform = listPlatforms[record.vector_id]; 
                    indj++;  
                  }    
                }

                else if(record.isscrolled==true)
                {
                  if(record.idm==null && record.vector_id !=null)
                  {
                    listScroll[indk] = {media : null, platform : null};
                    listScroll[indk].media = null;
                    listScroll[indk].platform = listPlatforms[record.vector_id]; 
                    indk++;
                  }
                  else if(record.vector_id==null && record.idm!=null)
                  {
                    listScroll[indk] = {media : null, platform : null};
                    listScroll[indk].platform = null;
                    listScroll[indk].media = listMedias[record.idm-1];
                    indk++;
                  }
                  else
                  {
                    listScroll[indk] = {media : null, platform : null};
                    listScroll[indk].media = listMedias[record.idm-1];
                    listScroll[indk].platform = listPlatforms[record.vector_id]; 
                    indk++;  
                  }       
                }
              }

            });
    });
}

I obtain data in a HTML page, I use a controller (with Angular.js) to manipulate it and, I transmit it to my server.js file (node.js).

The request resulted, when I test it on Workbench, it works with no problem. But with this code, I have a request pending, like this :

When I stop the web application, the change executed by the request can be made.

So, how to explain the present pending ? How to solve this ?

via Simon Girard