Cron not Working in Magento +Solution

I recently had a Magento store that was not running cron jobs despite everything appearing to be set up correctly.

After tearing out my hair, I discovered that there was a cron job running that had not closed properly, which prevented any new cron jobs from starting.

This is because the file that is used by magento checks the currently running processes, and if one exists quietly exits.

To check if this is the case you can run a modified line from the file as set out below

ps auxwww | grep “/path/to/magento/cron.php” | grep -v grep | grep -v

If this returns a line similar to the one below

root 2125 0.0 0.9 329896 40484 ? S Nov13 0:00 /usr/bin/php /path/to/magento/cron.php

You can kill the running job, which will allow cron to run normally. At this stage you should debug the cron tasks to see why the process stalled