Make sure that only one PhantomJS process is running at any single time

plugins/reporting/index.js

@@ -23,9 +23,6 @@ exports.initWebApp = function(options) {
   var count = 0;
 
   Ping.on('afterInsert', function(ping) {
-    if (count > 1) {
-      return;
-    }
     Check.findById(ping.check, function(err, check) {
       if (err) {
         return;
@@ -45,13 +42,17 @@ exports.initWebApp = function(options) {
         }
       }
 
+      if (count > 0) {
+        return;
+      }
+      count++;
+      console.log('PhantomJS started, currently ' + count + ' processes.');
+
       // Create the report
       var phantomjs = require('phantomjs-prebuilt'),
           path = require('path'),
           program = phantomjs.exec(path.join(__dirname, 'phantomjs-script.js'), config['url'], config['basicAuth']['username'], config['basicAuth']['password'], check._id, output, 'month', date);
 
-      count++;
-      console.log('PhantomJS started, currently ' + count + ' processes.');
       program.on('exit', function() {
         count--;
         console.log('PhantomJS finished');