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https://bugs.launchpad.net/bugs/1630905

Title:
  Loss of lan connection causes applications using gvfsd-sftp to hang
  until demon is killed

Status in gvfs package in Ubuntu:
  Fix Released
Status in gvfs source package in Bionic:
  Fix Released

Bug description:
  * Impact

  The gvfsd-sftp service sometime hangs

  * Test case
  - connect to a ssh server from nautilus
  - suspend the computer for longer than the ssh timeout (1 hour for example)
  - resume and try to use the connection

  * Regression potential
  Check that nautilus access to remote servers still work correctly

  -----------------------------

  
  This affects an installation of Ubuntu 14.04 on a Lenovo laptop.
  When applications like nautilus or Bluefish are connected to a remote 
fileshare using sftp (ssh) via a lan connection, if the connection is lost and 
re-established the old process seems to hang blocking attempts to save data or 
use Nautilus in any way.

  This typically occurs when the connection is either lost accidentally
  or when the laptop is suspended and then unsuspended causing a loss of
  wireless connection.

  The workaround is to kill the gvsftp process manually and then
  recreate the remote connection using Nautilus.

  This bug leads to data loss if, for instance, the laptop is closed
  (starting suspend mode) while in the middle of a task that must be
  saved.

  ERROR: apport (pid 5064) Thu Oct  6 17:38:29 2016: called for pid 3309, 
signal 6, core limit 0
  ERROR: apport (pid 5064) Thu Oct  6 17:38:29 2016: executable: 
/usr/lib/gvfs/gvfsd-sftp (command line "/usr/lib/gvfs/gvfsd-sftp --spawner :1.4 
/org/gtk/gvfs/exec_spaw/28")
  ERROR: apport (pid 5064) Thu Oct  6 17:38:29 2016: debug: session gdbus call: 
(true,)

  ERROR: apport (pid 5064) Thu Oct  6 17:38:30 2016: wrote report
  /var/crash/_usr_lib_gvfs_gvfsd-sftp.1000.crash

  Description:  Ubuntu 14.04.5 LTS
  Release:      14.04

  gvfs:
    Installed: 1.20.3-0ubuntu1.2
    Candidate: 1.20.3-0ubuntu1.2
    Version table:
   *** 1.20.3-0ubuntu1.2 0
          500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 
Packages
          100 /var/lib/dpkg/status
       1.20.1-1ubuntu1 0
          500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

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