OS X Server Locks Every Morning

Specs:
12' Mac Mini 2.5GHz i5 4GB Ram 500GB HD with 2TB Ex On RAID for Backup, OS 10.10.3
Running 2 Parallel OS X 10.10.3 Servers each with 1GB of RAM.
All Software is up to date
The Installs are very minimal. No extra's just the server.

Problem
Every Morning when I come in to the office both my servers are off line. When I attach a screen They are running and just take a minute to then show up in a server client on my MBP. What the heck is going on? How do I keep the server Live?

kweevuss said:

With this mac mini only having 4GB and the VM's taking up 2GB that doesn't leave the host os very much room. I would check activity monitor to see what the memory pressure is like

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with both machines running and stable memory load is sitting between 60-70%

Native Parallels is 150 MB
Servers are 550-650 MB Each.

The servers run great all day long. Granted Im not loading them much at al. Cal, Reminders, Contacts, A Wiki and a webpage redirect....They are basically there so that the guys in the field have uptodate cal's with job details and contacts for new clients.

marzer said:

From what you describe, I don't think the issue is memory. If they run fine all day long then obviously you have sufficient memory. This sounds like a energy saver/wake issue. I have dealt with wake-up problems on and off with my 2012 headless mini. Could be something is interfering with the wake on LAN. In my case it turned out to be a third party utility I was running in the background.

What are your sleep settings? Do you have "wake on network" enabled?

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I have it set to never sleep. but I also have the wake on lan set on all 3 systems (Host and 2 PL)

ratsg said:

any "smoking guns" in the system logs from around the time your system freezes?

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Havnet checked. will check tomorrow. thanks for the idea. Not acustom to looking at log files.

btdpi007 said:

Take this for whatever it's worth, but you state you attach a monitor every morning which I presume means you run the servers "headless". I recall have all types of issues running my Mac mini server "headless" and attached a monitor for several days and the problems went away. You may want to see if the "headless" part is attributing to your issues. A possible workaround if you determine this is your cause is to keep a monitor attached or build a dummy dongle.

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I do Infact run it headless. I have thought about putting a cheap 1080 wall mounted screen and having it display photos or reference charts for me. shame it can't drive a 4k!

https://forums.macrumors.com/attachment.php?attachmentid=555015&stc=1&d=1432388187

So it did it again this morning. I work up, fired up the Cal app and "...can not be refreshed".... So I start server. type in my domain and a few seconds later Im looking at the server no problem. Every thing appears to be normal. Looking through the logs doesn't show many any glaring sign of anything that went wrong. Every hour there is a log entry of listening on HTTP and HTTPs ports (cal and contacts ports) there is only one entry at 4:46 am that shows any type of error

May 23 04:46:33 mycompany.com BezelServices 250.15[99]: ASSERTION FAILED: dvcAddrRef != ((void *)0) -[DriverServices getDeviceAddress:] line: 2727

No idea what it means