Merge pull request #681 from CartoDB/feature/ch139802/phl-inconsistent-errors-when-downloading

[ch139802] Avoid concurrent requests from getting stuck when exporting file formats handled by OGR - v2

lib/models/formats/ogr/shp.js

@@ -1,5 +1,6 @@
 'use strict';
 
+var uuid = require('uuid');
 var step = require('step');
 var fs = require('fs');
 var spawn = require('child_process').spawn;
@@ -37,7 +38,7 @@ ShpFormat.prototype.toSHP = function (options, callback) {
     var zip = global.settings.zipCommand || 'zip';
     var zipOptions = '-qrj';
     var tmpdir = global.settings.tmpDir || '/tmp';
-    var reqKey = this.limitPathname(['shp', dbname, userId, gcol, this.generateMD5(sql)].concat(skipfields).join(':'));
+    var reqKey = this.limitPathname(['shp', dbname, userId, gcol, this.generateMD5(sql), uuid.v4()].concat(skipfields).join(':'));
     var outdirpath = tmpdir + '/sqlapi-' + process.pid + '-' + reqKey;
     var zipfile = outdirpath + '.zip';
     var shapefile = outdirpath + '/' + filename + '.shp';