Comment 3 for bug 798152

With the stack trace given, it seem that there was a MaharaException generated from
htdocs/lib/activity.php:462
call_static_method($notificationclass, 'notify_user', $user, $userdata);
This in turn calls activity_occurred again on line 476 (resulting in an endless loop, yay!)
This second call is sent to the admin
This line of code is only called if $user->method != 'internal'

Possible causes are bad email?

Michael,

Would you be able to let us know whether the users are getting an email sent to them?
Also, is the normal user requesting friendship of the admin user, or another normal user.
Would you be able to look at the email addresses in question and let us know if they are correct, and whether you can manually send an email to those addresses
Also, is the email system in mahara working in other areas, for example you can try creating a forum and replying to a post created by a user, they should receive a user.

Cheers,

Hugh