This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1889721

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: xenial

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https://bugs.launchpad.net/bugs/1889721

Title:
   xenial/linux: 4.4.0-186.216 - Problem with NFS mount

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Xenial Package: linux-image-generic (4.4.0.186.192)

  Since Xenial Kernel upgrade to version linux: 4.4.0-186.216, there is
  a problem with the NFS mounts, when the NFS Server has a timeout.

  The journal and syslog are reporting thousands of the following messages per 
second
  Jul 30 09:05:07 ... kernel: [  280.904750] xs_tcp_setup_socket: connect 
returned unhandled error -1

  The server becomes instable and OS hungs. Reboot resolves the issue
  until the next NFS timeout occures.

  
  using the previous kernel Linux 4.4.0-185-generic resolves the issue.

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