async.parallel stops working on huge list of array - asynchronous

Question

i'm still new with async module. Basically, I want to do the batch update operation from array using async.parallel, like this :
var _ = require('lodash');
var async = require('async');
var list = req.body.dataArr; //the array
var asyncTasks = [];
_.each(hotelList,function(value,key){
asyncTasks.push(function(callback){
Hotel.find({hotelId:value.hotelId}).exec(function(err,hotels){
if(err){
console.log(err);
}
if(hotels.length ==0){
//hotel not found
console.log('Hotel not found for ID :'+value.hotelId);
return;
}
hotels[0].countryCode = value.countryCode;
hotels[0].city = value.city;
hotels[0].save(function(err){
if(err){
console.log('saving failed ... Reason : '+err);
return;
}
console.log('saving successful');
});
});
});
});
async.parallelLimit(asyncTasks,function(){
//async.parallelLimit(asyncTasks,10, function(){
console.log('finish call asyncTask');
res.json({status:'success'});
});
The problem is, when i run it using all data in array (there's more then 100.000 indexes), it only stop without any message eventough i have waited for several minutes, but when i try to limit the array to only 10 using parallelLimit, it only do 10 update operation like this :
saving successful
Is there something wrong in how I'm using async? Sorry if my english is bad.

Answer 1

Your asyncTasks functions need to call their callback parameters when they've finished their work so that parallel or parallelLimit knows when they're done.
_.each(hotelList,function(value,key){
asyncTasks.push(function(callback){
Hotel.find({hotelId:value.hotelId}).exec(function(err,hotels){
if(err){
console.log(err);
return callback(err);
}
if(hotels.length ==0){
//hotel not found
console.log('Hotel not found for ID :'+value.hotelId);
return callback(Error('Not found'));
}
hotels[0].countryCode = value.countryCode;
hotels[0].city = value.city;
hotels[0].save(function(err){
if(err){
console.log('saving failed ... Reason : '+err);
return callback(err);
}
console.log('saving successful');
callback();
});
});
});
});