Rented the Shaggy rig on leaserig.net.
Everything ran well for a few hours, and then the rig speed dropped to 2.91 Mhs and stopped submitting shares altogether. It did this for about 45 minutes, and then started back up again.
After another hour of running at the advertised rate, the speed dropped to 2.91 Mhs again, and it stopped submitting shares for about 45 minutes (which is where it's still at).
The interesting thing here is that while the rig isn't doing anything, it's still reporting a hash rate of 2.91 Mhs, so there wouldn't be an offline notification.
Perhaps the provider would be so kind as to shed some light on what's happening behind the scenes? :-)
I noticed the same thing and I rebooted my rig both times. As you mention I did not get a message to let me know the rig was down I just happen to be checking it since I am new and want to make sure evreything runs smooth. Both times I see the hash speed on sgminer but I see that no shares are being submitted.
I have had issues when the pools are switched and it would freeze the rig but this is not the case in this situation. The rig doesn't freeze the pool just seems to stop requesting work or sgminer stops submitting requests.
Would you mind switching to your secondary pool and see if the problem happens again?
Also if you could send me a message if something else happens. I would likely get a PM faster then I would check my reputation thread.