Database access in a thread

Hi all,

Even after setting ActiveRecord::Base.allow_concurrency = true in my
controller, I can’t access the database in a new thread that I create
within that controller.

I am trying to start a new thread in my controller after sending out an
email. If after 5 minutes of sending out that email, a response is not
detected (by way of a flag in the database), I need to reset that flag.
So my new thread will sleep for 5 minutes and then check the database
and take the necessary actions.

BackgroundRB seems way too complicated for such a task.

This seems such an easy thing to do in Java and other languages but has
got me stumped here. I have trawled the Internet and looked up all sorts
of books, to no avail!

Any help appreciated.

Vikram