I have never noticed this on any of the VPS systems, but for some unknown reason I can't explain the wallet goes from an unlocked state to a locked state and at the same time block production gets disabled. When this occurs all that is required to resume normal block production is to unlock the wallet.
When I unlock the wallet I set the time for it to remain unlocked to weeks, so that is not the issue.
I'm using different monitoring options in bts_tools than I was on the VPS, and I'm wondering if that might be the cause. It doesn't seem likely, but I'm puzzled by this behavior. It seems to happen every other day or so.
Wackou, I have set the "missed" blocks option in monitoring array, but when this occurs I get no notification, tho blocks are missed. Any ideas why?