I have not opened an SR on this yet, but over the past week I've had to restart the Preboot Service multiple times. Everything functions properly, except automated imaging (such as flagging to apply an image or take an image). I restart the service and everything works again for a random period of time.

Servers are 2012 R2 Standard. I hadn't noticed this problem previously, but then I haven't done much automated imaging in that zone. Anyone have a suggestion of what to look at? I see nothing in the novell-pbserv.log file that points to any problems, other than there are no entries for 5 hours before I restarted the services. On days where everything works, I never go more than an hour without an entry.