Why "Unexpected Error" on UrlFetchApp GAS - google-apps-script

Question

My code has an issue when run by trigger but running manually is ok.
i have the following function
var url = "https://api.facebook.com/method/links.getStats?urls="+links+"&format=json";
var getParams = {
"method": "get",
"validateHttpsCertificates":false,
"accept": "application/json",
"muteHttpExceptions": true
};
var stats = UrlFetchApp.fetch(url,getParams);
Utilities.sleep(3000);
var cont = JSON.parse(stats.getContentText());
Running by trigger it logs "Unexpected Error"
according to my research i found that is an usual issue, i read that the rules to run manually are diferent than by trigger (even the ip are diferent)
"Apps Script uses two different UrlFetchApp pipelines: one for when the code is run by a user and one for when the code is run by a trigger. The trigger pipeline has some slightly different rules, which is why you are occasionally seeing these errors."
Well i think this is a serious issue and if google do it on purpose to regulate Fetch calls, i think is an offense for users and basically should not exist trigger service.
Any idea for the Solution?

Answer 1

I am found a posible temporal solution:
Util.fetchJSON = function (url) {
var maxTries = 3;
var tries = 0;
var res, body;
do {
tries++;
if (tries > 1) {
Utilities.sleep(1000);
Logger.log('GET %s (try #%s)', url, tries);
} else {
Logger.log('GET %s', url);
}
res = UrlFetchApp.fetch(url);
body = res.getContentText();
} while (!body && (tries < maxTries));
if (!body) {
throw new Error('Unable to fetch JSON after ' + tries + ' attempts: ' + url);
}
return JSON.parse(body);
};
But i dont know how to apply it to my original function: (help)
(this is a part of my original function)
function soyEspiritual() {
do {
try {
var pipe = "http://pipes.yahoo.com/pipes/pipe.run?_id=888ed60ff6a5ee79c05ec6963f6d3efe&_render=json";
var pipedata = UrlFetchApp.fetch(pipe,{method:"get"});
Utilities.sleep(3000);
var object = JSON.parse(pipedata.getContentText());