Dev/Core 25 Wrap the mailing split_job function in a transaction to e…

…nsure that there is no possibility of duplicate maiing jobs created

Include the split_jobs in the transaction used to update the parent job

CRM/Mailing/BAO/MailingJob.php

@@ -375,11 +375,11 @@ public static function runJobs_pre($offset = 200, $mode = NULL) {
         continue;
       }
 
+      $transaction = new CRM_Core_Transaction();
+
       $job->split_job($offset);
 
       // update the status of the parent job
-      $transaction = new CRM_Core_Transaction();
-
       $saveJob = new CRM_Mailing_DAO_MailingJob();
       $saveJob->id = $job->id;
       $saveJob->start_date = date('YmdHis');
@@ -437,6 +437,7 @@ public function split_job($offset = 200) {
         CRM_Core_DAO::executeQuery($sql, $params);
       }
     }
+
   }
 
   /**