Logsi

Q: File Sharing Grinds to a Halt in Yosemite

I've been having a problem since 10.10 whereby out of the blue our Mac Mini fileserver just grinds to a halt and whenever someone tries to access files in the finder on their client Macs it will just hang and beachball.

 

I've troubleshooted a little bit from having to reboot the server to now ejecting the culprit client off the network This then speeds the network back up again but there is no way to tell which client will be the one that's caused the issue so i have to quickly run around the office and check everyones finder and the problem Mac will be the one that's a tad slower to load files in the finder than others. It's almost as if the computers are DoSing our own server which then slows down the network. There is no way to replicate this issue it seems and comes totally out of the blue.

 

We mainly have word and excel files on the server. We are connected via SMB with AFP turned off. I don't think this issue happens if we're all on AFP but different issues happen with AFP like not being able to save documents and we also need SMB on.

 

All clients are on 10.10.3 and the server is also on 10.10.3.

Posted on Apr 30, 2015 2:28 AM

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Q: File Sharing Grinds to a Halt in Yosemite

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  • by AJ 2010,

    AJ 2010 AJ 2010 Jul 15, 2015 8:33 AM in response to Logsi
    Level 1 (4 points)
    Jul 15, 2015 8:33 AM in response to Logsi

    While that's extremely disappointing news, I do want to thank Logsi for continuing to follow up with their findings. It drives me insane to find a thread that matches your problem but the person never comes back to say if they found a solution or what they have tried. My bug report was recently rejected for being a duplicate but since Apple doesn't allow you to view any other bug reports it's impossible to know if that's actually the case or not. It would be interesting to see what Apple phone support makes of this once you got to their tier 2 or 3 level of support engineers.

  • by Peter Goldman1,

    Peter Goldman1 Peter Goldman1 Jul 15, 2015 8:46 AM in response to AJ 2010
    Level 1 (24 points)
    Jul 15, 2015 8:46 AM in response to AJ 2010

    Thanks for keeping this thread (and hope) alive Logsi + AJ2010.

     

    I'm still here as well.. and will remain... while we search for a solution.

     

    Not to sidetrack this thread at all, but Logsi - what issues with AFP are you experiencing?  Reverting everyone's connections to AFP has been a (albeit a bit ridiculous) fairly sufficient temporary fix for us.

  • by Logsi,

    Logsi Logsi Jul 15, 2015 8:48 AM in response to AJ 2010
    Level 1 (5 points)
    Jul 15, 2015 8:48 AM in response to AJ 2010

    One other update i've had to this problem is that i could sort of simulate the problem when a client computer in the office quickly went through files and used quick look repeatedly it would then spew out errors in the console about running out of memory and cause SMB slow down. Not sure if this is a coincidence.

  • by Logsi,

    Logsi Logsi Jul 15, 2015 8:50 AM in response to Peter Goldman1
    Level 1 (5 points)
    Jul 15, 2015 8:50 AM in response to Peter Goldman1

    The office would have problems with their Office documents/spreadsheets saving.

     

    It would sporadically just not let people save their documents/spreadsheets with little to no indication as to why. I may be forced to try AFP again...

     

    The Office 2011 suite of applications would just give the error "Document not Saved", which is very insightful! We couldn't even save as a new copy...could only shut the program down and start again losing work in the process.

  • by Peter Goldman1,

    Peter Goldman1 Peter Goldman1 Jul 15, 2015 8:54 AM in response to Logsi
    Level 1 (24 points)
    Jul 15, 2015 8:54 AM in response to Logsi

    Yes, we saw the sporadic issue with Office document saving as well... interestingly both via AFP and SMB on 10.4.x server.

     

    Interestingly... when comparing them back to back and side to side...  Office 2016 does _not_ have that problem.

  • by Logsi,

    Logsi Logsi Jul 15, 2015 8:59 AM in response to Peter Goldman1
    Level 1 (5 points)
    Jul 15, 2015 8:59 AM in response to Peter Goldman1

    Unfortunately at the moment, even with the release build of Office 2016, it's not viable for some people in the office to use it. It's still a bit finicky with heavily macroed spreadsheets and has weird issues. I'm slowly rolling it out across the office though and it's vastly better in speed than 2011.

     

    Also, when a file path is longer than 255 characters it won't save at all and won't tell you why it won't save unlike 2011...it was only trial and error that made me assume it was the 255 character file path issue. Not sure why this is still a problem in this day and age.

  • by Logsi,

    Logsi Logsi Jul 30, 2015 1:32 AM in response to Logsi
    Level 1 (5 points)
    Jul 30, 2015 1:32 AM in response to Logsi

    Here's a screen grab from a client macs console. Does this shed any light on the matter?

     

    Screen Shot 2015-07-30 at 09.30.35.png

  • by ianrsaffron,

    ianrsaffron ianrsaffron Oct 5, 2015 4:12 AM in response to Logsi
    Level 1 (0 points)
    Oct 5, 2015 4:12 AM in response to Logsi

    Logsi, thanks for posting this I am so grateful you posted this as I was thinking it was just me. Did you get any further with this? I believe it's an SMB2/3 issue but I can't be sure.

    I'm currently using Wireshark to analyse network data, however the random nature is annoying to put it mildly.

    Let me know

  • by Patto,

    Patto Patto Apr 8, 2016 10:43 AM in response to Logsi
    Level 1 (4 points)
    Apr 8, 2016 10:43 AM in response to Logsi

    I too have been experiencing this issue for the last 5 months with up to 35 iMacs on a LAN with a MacMini Server, all iMacs running Yosemite and using SMB exclusively. At random intervals - sometimes once a day - sometimes once a week a random Mac appears to cause network files transfer speeds to decrease to 1-5% of normal. Disconnecting the Mac restores speeds - reconnecting recommences the slowdown. Typically the problem may disappear after some hours or after the Mac is restarted. Recently I was lucky enough to find the offending Mac whilst onsite and ran a Wireshark capture and an Apple Data Capture. The packet capture looks very similar to those shown by others in this thread. Still baffled and frustrated.

  • by Patto,

    Patto Patto Apr 8, 2016 10:17 PM in response to Logsi
    Level 1 (4 points)
    Apr 8, 2016 10:17 PM in response to Logsi

    Further to my previous post I should also mention that when the issue arises - ALL network traffic slows down - not just file sharing

  • by Insix,

    Insix Insix Apr 9, 2016 9:30 PM in response to Patto
    Level 1 (8 points)
    Servers Enterprise
    Apr 9, 2016 9:30 PM in response to Patto

    I am having this same issue at several customers... How did you figure out what mac was the culprit? We have an open ticket with Apple Enterprise support for this issue for 2 months and so far they have been useless... Never thought from the angle that it could be a computer on the network...

     

    I always assumed it to be the server since it was never an issue with the 10.6 server previously anywhere... and seemed to happen only after we updated from I think 10.11.1 -> .2 or .2 to .3

  • by Logsi,

    Logsi Logsi May 4, 2016 2:42 AM in response to Insix
    Level 1 (5 points)
    May 4, 2016 2:42 AM in response to Insix

    I run a wireshark capture and look for offending traces that are along the lines of "INSUFFICIENT_RESOURCES".

     

    Disconnect them and the server speeds up again.

     

    I thought it may be a problem with the preview and quick look in finder. Disabling preview doesn't seem to work but may hinder the frequency it happens.

     

    May resort to Path Finder and see if this changes anything.

     

    This has only been a problem on Yosemite as far as I'm aware. Mavericks was just plain awful. I'm still having this issue a year on and wonder whether updating to El Cap 10.11.4 fixes it...it's a gamble as there is always a host of new problems to fix when you update the OS. You try and fix one problem with an upgrade but it causes another host of issues...

  • by DJ Flyte,

    DJ Flyte DJ Flyte May 16, 2016 3:02 PM in response to Logsi
    Level 1 (4 points)
    May 16, 2016 3:02 PM in response to Logsi

    Hi Logsi,

     

    Can you let me know how you filter wireshark to look for "INSUFFICIENT_RESOURCES"

    Where exactly do you do that in the wireshark app?

     

    Thanks!

  • by Patto,

    Patto Patto May 16, 2016 11:57 PM in response to Insix
    Level 1 (4 points)
    May 16, 2016 11:57 PM in response to Insix

    Selecting the random offending iMac was mostly trial and error - perhaps focussing on machines that had been on the longest without a reboot. By using a app like LAN_SpeedTest (Totusoft.com) to test file transfer speeds between any two Macs it is easy to monitor the immediate improvement in overall network speed when a Mac is disconnected- it jumps from less than 5Mbps to 100.

  • by Logsi,

    Logsi Logsi May 17, 2016 1:10 AM in response to DJ Flyte
    Level 1 (5 points)
    May 17, 2016 1:10 AM in response to DJ Flyte

    You can literally run a trace for 10 seconds and see if there is a problem. They'll be yellow in colour and there will be lots of them!

     

    I'm starting to think it's a problem with finder and previews. I've put a troublesome client on an application called Path Finder and i haven't had to boot them off since.

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