[Bug 1381236] [NEW] cifs share hangs after several hours

Phil Tull phil at aquilatech.com
Tue Oct 14 21:37:11 UTC 2014 

Public bug reported:

I have 2 cifs shares from Ubuntu to a Windows 2012 NAS.
The shares work at first, then after a few hours, one or both hang and do not respond until rebooting the ubuntu server.
In my example below, the video share has hung, but music is still working.  This system did work last year before I upgraded packages to 14.04.1.
I have tried purging and reinstalling cifs-utils, but no improvement.


This is /etc/fstab:
//deepthought/video$   /mnt/video      cifs    ro,_netdev,username=plex,password=xx,sec=ntlm     0      0
//deepthought/music$   /mnt/music      cifs    ro,_netdev,username=plex,password=xx,sec=ntlm     0      0


This is the output from /proc/fs/cifs/DebugData:

Display Internal CIFS Data Structures for Debugging
---------------------------------------------------
CIFS Version 2.02
Features: dfs fscache lanman posix spnego xattr acl
Active VFS Requests: 2
Servers:
1) Name: 192.168.0.213  Domain: AQUILA Uses: 1 OS: Windows Server 2012 R2 Datacenter 9600
        NOS: Windows Server 2012 R2 Datacenter 6.3      Capability: 0x1e3fc
        SMB session status: 1   TCP status: 1
        Local Users To Server: 1 SecMode: 0x3 Req On Wire: 0
        Shares:
        1) \\deepthought\music$ Mounts: 1 Type: NTFS DevInfo: 0x20020 Attributes: 0xc700ff
        PathComponentMax: 255 Status: 0x1 type: DISK

        MIDs:

2) Name: 192.168.0.213  Domain: AQUILA Uses: 1 OS: Windows Server 2012 R2 Datacenter 9600
        NOS: Windows Server 2012 R2 Datacenter 6.3      Capability: 0x1e3fc
        SMB session status: 1   TCP status: 4
        Local Users To Server: 1 SecMode: 0x3 Req On Wire: 1
        Shares:
        1) \\deepthought\video$ Mounts: 1 Type: NTFS DevInfo: 0x20020 Attributes: 0xc700ff
        PathComponentMax: 255 Status: 0x1 type: DISK    DISCONNECTED

        MIDs:
        State: 2 com: 114 pid: 11739 cbdata: ffff8800e515c800 mid 11

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: cifs-utils 2:6.0-1ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
Date: Tue Oct 14 17:23:14 2014
InstallationDate: Installed on 2014-03-06 (222 days ago)
InstallationMedia: Ubuntu-Server 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: cifs-utils
UpgradeStatus: Upgraded to trusty on 2014-08-22 (53 days ago)

** Affects: cifs-utils (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1381236

Title:
  cifs share hangs after several hours

Status in “cifs-utils” package in Ubuntu:
  New

Bug description:
  I have 2 cifs shares from Ubuntu to a Windows 2012 NAS.
  The shares work at first, then after a few hours, one or both hang and do not respond until rebooting the ubuntu server.
  In my example below, the video share has hung, but music is still working.  This system did work last year before I upgraded packages to 14.04.1.
  I have tried purging and reinstalling cifs-utils, but no improvement.

  
  This is /etc/fstab:
  //deepthought/video$   /mnt/video      cifs    ro,_netdev,username=plex,password=xx,sec=ntlm     0      0
  //deepthought/music$   /mnt/music      cifs    ro,_netdev,username=plex,password=xx,sec=ntlm     0      0


  This is the output from /proc/fs/cifs/DebugData:

  Display Internal CIFS Data Structures for Debugging
  ---------------------------------------------------
  CIFS Version 2.02
  Features: dfs fscache lanman posix spnego xattr acl
  Active VFS Requests: 2
  Servers:
  1) Name: 192.168.0.213  Domain: AQUILA Uses: 1 OS: Windows Server 2012 R2 Datacenter 9600
          NOS: Windows Server 2012 R2 Datacenter 6.3      Capability: 0x1e3fc
          SMB session status: 1   TCP status: 1
          Local Users To Server: 1 SecMode: 0x3 Req On Wire: 0
          Shares:
          1) \\deepthought\music$ Mounts: 1 Type: NTFS DevInfo: 0x20020 Attributes: 0xc700ff
          PathComponentMax: 255 Status: 0x1 type: DISK

          MIDs:

  2) Name: 192.168.0.213  Domain: AQUILA Uses: 1 OS: Windows Server 2012 R2 Datacenter 9600
          NOS: Windows Server 2012 R2 Datacenter 6.3      Capability: 0x1e3fc
          SMB session status: 1   TCP status: 4
          Local Users To Server: 1 SecMode: 0x3 Req On Wire: 1
          Shares:
          1) \\deepthought\video$ Mounts: 1 Type: NTFS DevInfo: 0x20020 Attributes: 0xc700ff
          PathComponentMax: 255 Status: 0x1 type: DISK    DISCONNECTED

          MIDs:
          State: 2 com: 114 pid: 11739 cbdata: ffff8800e515c800 mid 11

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: cifs-utils 2:6.0-1ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  Date: Tue Oct 14 17:23:14 2014
  InstallationDate: Installed on 2014-03-06 (222 days ago)
  InstallationMedia: Ubuntu-Server 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: cifs-utils
  UpgradeStatus: Upgraded to trusty on 2014-08-22 (53 days ago)

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