Android Ti.Network.createHTTPClient memory leak

I have created a background service that every second has to ask to the server if there are any new data. Using debug monitor what I notice is that the allocated memory is growing and growing till it says memory leak.

index.js

var intent = Titanium.Android.createServiceIntent({
    url: 'service.js'
  });
intent.putExtra('interval', 1000); // Needs to be milliseconds
 
Titanium.Android.startService(intent);

service.js

var URL = "localhost:8051";
Ti.API.info("checkForNotification: " + URL );
 
var xhr = Ti.Network.createHTTPClient({
     onload: function(e) {
             Ti.API.info('onload called, HTTP status = '+this.status); 
      },
     onerror: function(e) {
             Ti.API.info('error, HTTP status = '+this.status); 
     },
     timeout:5000  /* in milliseconds */
});
 
xhr.open('GET', URL);
xhr.send();

What I have realized so far is fault of xhr.send(), it does not get clean or maybe it's me doing something wrong. Can anyone suggest, how to avoid this memory leak?