** Description changed:

  On Ubuntu 16.04.02 running SAMBA 4.3.11, various OS X (or macOS now)
  clients have issues with our SAMBA server which uses ZFS as the
  filesystem.
  
  During their regular work, it seems nothing that can be pinned down,
  every share the system is connected to will disconnect with a
  notification from macOS. This occurs on our Yosemite, El Cap, and Sierra
  clients. The systems can be remounted immediately without needing a
  reboot or resetting services.
  
  This happens anywhere between once and many times a day, but there is
  not a day that goes by where it doesn't happen once.
  
  The ZFS pool is basic but large (10 pools of 10 disks in a z2), and
  there is a 128GB of ram dedicated to caching. There have been no
  reported issues with ZFS that I can see. No errors, missing devices,
  corruption, etc... The pool is set xattr=sa.
  
  As you can see from the attached smb.conf, fruit is active and
  configured. We have tried countless variations of the smb.conf but COULD
  have missed something, so invite enquiries there.
  
+ More details: The server is connected over a lagged connection to a
+ switch then served to the clients. Some clients are connecting through a
+ Dell switch and some through a Supermicro switch, both with their own
+ LAG. This doesn't seem to matter.
+ 
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: samba 2:4.3.11+dfsg-0ubuntu0.16.04.3
  ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
  Uname: Linux 4.4.0-59-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  Date: Wed Feb 22 20:45:15 2017
  InstallationDate: Installed on 2017-02-02 (19 days ago)
  InstallationMedia: ShareOS 16.04.1 2017.02.01 amd64 "ShareOS Xenial"
  NmbdLog:
-  
+ 
  OtherFailedConnect: Yes
  ProcEnviron:
-  LANGUAGE=en_US
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_US
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SambaServerRegression: No
  SmbConfIncluded: Yes
  SmbLog:
-  
+ 
  SourcePackage: samba
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1666843

Title:
  Regular recoverable disconnections over SAMBA on OSX clients

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