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New Intel Xserve rebooting under network load

18142 Views 17 Replies Latest reply: Mar 9, 2007 3:52 PM by DaddyPaycheck RSS
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Wes Plate Level 4 Level 4 (2,845 points)
Currently Being Moderated
Aug 14, 2008 7:24 AM
We added an Xserve before the end of the year (2006), and we added an Xserve RAID to it just this last week.

During the period before the RAID was installed, the Xserve was used lightly as a file server, mostly just enough for me to move some files around the office and start to get to know OS X Server.

With the RAID attached we've started to try using the system as we intend, which is to have a large common file repository where common files can be shared out to the several clients on the GigE network.

So far the results have been disappointing, the Xserve has shut down and reboot itself a few times during periods of active use. I searched this forum and found a suggestion to run memtest and I have that tool running right now on the server. The system has 2GB of RAM installed.

Is RAM a good place to start with crashes that seem to be related to network load? How else can I troubleshoot?

I've not yet called Apple, I hoped to get more info before standing on line in the phone queue.
MacBook Pro, Dual Core 2.16, Mac OS X (10.4.8), Keyboard protected with leather
  • Roger Smith3 Level 6 Level 6 (13,475 points)
    Currently Being Moderated
    Feb 12, 2007 3:50 PM (in response to Wes Plate)
    If the machine is panic'ing and rebooting, what does /Library/Logs/panic.log say?

    Roger
    XServer, Mac OS X (10.4.3), XRAID, Xasperated
  • DaddyPaycheck Level 6 Level 6 (16,035 points)
    Currently Being Moderated
    Feb 13, 2007 2:57 AM (in response to Wes Plate)
    Wes Plate-

    Something wrong there. My gut says hardware. When it shuts down is it graceful or pow and off?

    Did you enable any other services when you attached the RAID? Are you doing anything radically different.

    Odd that nothing is in the panic log. Do you have redundant power supplies? One of those heading south and no backup PS could cause an immediate shutdown.

    Memtest is good for rooting out errors, but you should run it at east 10 times or so just to be sure.

    Luck-

    -DaddyPaycheck
    Basement XServe sitting on a Box of Apples, Mac OS X (10.4.8), A collection of clinking, clanking caliginous junk.
  • DaddyPaycheck Level 6 Level 6 (16,035 points)
    Currently Being Moderated
    Feb 13, 2007 6:09 AM (in response to Wes Plate)
    Wes Plate-

    Any chance of idiot-interference (somebody hit the button?) on the power down? Is the server room on UPS? I would cover that before anything else.

    Any chance your AC supply side got overloaded? A RAID and an X is a bit of a load and your circuit should be rated for that load.

    I am fairly certain that you can purchase the power supplies separately. Plug and pray I would guess but I haven't done this myself.

    Go slow when connecting peripherals. Make sure everything is working correctly first before proceeding to the next step. Consider troubleshooting this problem first, find the cause, and then make sure things are stable before going to the next step.

    Luck-

    -DaddyPaycheck
    Basement XServe sitting on a Box of Apples, Mac OS X (10.4.8), A collection of clinking, clanking caliginous junk.
  • DaddyPaycheck Level 6 Level 6 (16,035 points)
    Currently Being Moderated
    Feb 13, 2007 3:29 PM (in response to Wes Plate)
    Wes Plate-

    Those data points certainly point towards the Ethernet circuitry.

    Luck-

    -DaddyPaycheck
    Basement XServe sitting on a Box of Apples, Mac OS X (10.4.8), A collection of clinking, clanking caliginous junk.
  • Tod Kuykendall Level 4 Level 4 (2,270 points)
    Currently Being Moderated
    Feb 14, 2007 11:53 AM (in response to Wes Plate)
    Wow, pretty conclusive evidence of the problem. If a single app is using this much memory it should be obvious in the Activity Monitor above. Sort by memory usage see what bubbles to the top.

    It will probably be Apple File Server or something opaque like kernel task but you never know. Grabbing samples may or may not help analysis. I think selecting the thread and "inspecting" is the best you can do with the regular tools. Apple's Dev tools have several interesting debugging tools, Big Top and Shark for example, that you can attach to virtually any process that is running and see where it is spending it's time and resources. I've never tried attaching them to system processes but they are technically no different than regular processes.

    Out of interest how do you cause the problem? Is it just overloading it or is it something specific? I was thinking that you could hit the server and see if it recovers over time... any process that eventually swallows all memory always suggests memory leakage to me. If you could watch a thread always increment in memory every time you do X that is pretty clear evidence of leak situation. On the PPC AFP now seems to free memory way better then it ever did before the Intel versions came out. They clearly dug deeply into the guts of AFP for the Intel port and the PPC side gained some beenfits but perhaps there is still a missed "free" on the Intel side...

    =Tod
    G5/2.0x2, Dual XServes x2, XRAID, beige G3 501Mhz
  • Tod Kuykendall Level 4 Level 4 (2,270 points)
    Currently Being Moderated
    Feb 14, 2007 12:48 PM (in response to Wes Plate)
    Wes,

    Change the pop-up after the search field to either Active Processes or All Processes to get at the system level stuff and sort by memory. Clearly it's nothing you're running in your space that's triggering it.

    This is no guarantee to reveal which process it is because it could be an underlying process but memory is much easier to trace than CPU consumption so I would be surprised if you can't find it.

    =Tod
    G5/2.0x2, Dual XServes x2, XRAID, beige G3 501Mhz
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