Cron Produces Duplicate Submissions [Solution Included]

Hi,
When the Eloqua modules sends post information via cron if the next cron run is triggered before the first one finishes you will end up with duplicates. This is easy to fix using Drupal's lock features. This issue will show up immediately on Acquia since it uses multiple servers to trigger cron jobs at the same time.

Goto line 51 in eloqua.module and replace the eloqua_cron function with the one below:

module_load_include('inc', 'eloqua', 'eloqua.cron');
$lock = lock_acquire('eloqua_cron',300);
if($lock) {
_eloqua_cron();
lock_release('eloqua_cron');
}