I had a client complain about the same thing recently. What I found in my research was that the (51) indicates one particular flavor of this message. It means the server didn't hear from the client as expected. The FM client is supposed to ping the server every 60 seconds if there is no other network activity happening during that time. If the server doesn't hear from a client after 125 seconds (two pings missed) and the server doesn't have anything to send to the client, it disconnects the client with a (51) message.
From what I've been able to pick up from various boards, this may be due to a network issue. But it may just be that the FM client computer went to sleep, which also causes failure to check in with the server. (In my client's case, they have many iPad users who are working outside and when they move out of network range, they get disconnected by FM Server with that same warning message.)
Maybe someday FMI will produce a list of possible FM Server log messages with an in-depth discussion of what they mean.
Thanks for the info onn your experiences.
Mine in rehash#
1. The server never sleeps, never sleeps the hard disk.
2. All clients never sleep, never sleep the hard disk.
3. The redeploy of the iMac has had no issues at all. FMS 13 with OSX 10.9.2.
4. The MacMini, in testing at my "laboratory" with three connected Macs, demonstates the connection dropouts. Tried WIFI and Ehtenret direct.
5. This is true for FMS13 on 10.9.2 and for, on the other internal SSD, for FMS12 on 10.9.2.
Have many hours on phone with Apple. Will now "spend" time with FMI tech tomorrow.
Since all my time will not be billed I am tempted to order another same spec Mini to see if I can replicate the issue.
"It is better, of course, to know useless things than to know nothing." --- Lucius Annaeus Seneca
Don't forget the networking hardware. Could be a faulty router or switch (or a bad port on one). Try switching those out first since they tend to be cheaper than swapping out a server.
While you are at it, check for bad cables and check where they run to see if there could be any other interference. Same for the wifi.
Agreed Wim. I have a client, a school, which is experiencing the same problem with their Mac's. It doesn't happen on the Windows machines. They have a really slow internet connection and it's really heavily used by students in their classrooms. Due to their location, they can't do anything about internet speed. Our best guess is that the 'pings' to the server are simply getting lost or drowned out by the other internet traffic. It could be that the router is simply not coping.
Another possibility is your network configuration.
Until recently, I was under the impression that it was OK to have a GigaBit switch (or two) between client and server. We had several 8-port ones that were passing the traffic from FMS server to some clients. I've since learned that longer cables from a single GigBit switch is a much better configuration as it is far less likely to drop the network speed when traffic is high.
You probably already know all this!!
The iMac works 100%. The MacMini rather less so. Exactly the same network configuration. Same ethernet cable. Same physical space.
"In preparing for battle I have always found that plans are useless, but planning is indispensable." --- Dwight D. Eisenhower
Well. Apple has taken back both MacMini's, credited VISA account, and now we are shopping for a MacPro.
The only MacMini configuration that had no disconnects was MacMini and two laptops all hardwired to a dedicated router with max cable length 3 feet between any computer and router. Even tried a different router.
"The key to everything is patience. You get the chicken by hatching the egg, not by smashing it." --- Arnold H. Glasow
That is weird.
My disconnects seem to be when the laptops go to sleep. I set all the iMacs to never sleep (hard disks) and this solved the problem, mostly. The MacMini Server is also set to never sleep and never turn off the display. I have one 2011 iMac that still has random disconnects, but it is less frequent. The iMacs are all wired to the same switch as the MacMini.
How old are the clients? Maybe this is an issue with older hardware running 10.9.2.
The laptops are still set to sleep and the users understand the will disconnect. The most rediculous thing is the diconnect warning window. This dialog box should really have an option to reconnect to any of the disconnected files. The users need to interact with the dialog and then move to the menu bar to open the file again.
Given that it's Mavericks, is there any chance that "App Nap" is coming into play? On the clients, that is.
The information from the latter link that caught my eye is "How it works: An app enters App Nap when it’s completely hidden from view and not actively working."
Just from a quick test on my own machine, FMPA enters App Nap regularly - but is not losing network connection to the hosted files (which are on an iMac).
Of note is that my test machines were MacBookPro 15" running 10.8.5, MacBook running 10.7.5 and sometimes my MacBookPro 17" running 10.9.2. Same dropouts.
"Nothing is impossible, the word itself says 'I'm possible'!" --- Audrey Hepburn
I have app nap disabled globally and for the FM app. Still happens on the old iMac but less often and it is tolerable.