Error: socket hang up in Node JS using request-promise module

I am getting socket hang up eror message while sending request. As per observation request is getting processed but at the time of sending response, I am getting below response:

 {
   "success":false,
   "error":{
     "name":"RequestError","message":"Error: socket hang up","cause":{"code":"ECONNRESET"},
     "error":{"code":"ECONNRESET"},
     "options":{"uri":"request url","simple":true,"resolveWithFullResponse":false,"transform2xxOnly":false}
   }
}

I am using below code:

var options = {
  uri: 'request url',
};
request(options).then(function(data) {
    res.json({
      success: true,
      data: data
    });     
 })
 .catch(function (err) {
    res.json({
      success: false,
      error: err,
    });
});