Why do bots keep going after the same site with the same exploit?
 

Why do bots keep going after the same site with the same exploit?
They hit every hour from the same domain trying to hit /mysqladmin/scripts/setup.php

Are the URLs feed in from a file? And the bad guys keep using the same file? Never deleting the urls were already processed?

Most of these attempted attacks are highly automated, if you run an SSH server for example you can see thousands of brute force attempts a day, the same goes for web exploits - lots of hackers using lots of automated scripts trying every IP address that returns as a HTTP server.

Thanks. Just seems odd, How they just keep trying and trying. And nobody tries to stop them.

It's your job as a webmaster and/or your server admin to stop them. Use .htaccess to 403 requests for common exploits like admin, install, setup, etc.