I have a scheduled rule (schedule, rules module) to send a HTML email (mime module), using a View to list the email addresses (View Rules).
I tested this based on a couple of users (all users within my site's database) and everything worked as expected. When I increased the number of emails (to around 1400), I found that around half the users received the email, over and over again.
I also noticed that when I manually run CRON, the page times out.
I can't see any errors logged, but these may have been cleared.
Could anyone explain why this is occurring? I'm confident that everything was working before the increase in user numbers.
If a CRON task times out / errors, does it repeat on every page hit until it is successful ?