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[Launchpad Bug Tracker <1596835@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package zfs-linux - 0.6.5.6-0ubuntu18

---------------
zfs-linux (0.6.5.6-0ubuntu18) xenial; urgency=medium

  * Improve cloning performance for large numbers of clones (LP: #1567557)
    Bump zcmd buffer from 16K to 256K.
  * Correctly install libraries such as libnvpair.so.1 to  /lib and not /usr/lib,
    this also fixes boot issues (LP: #1596835)

 -- Colin Ian King <colin.king@xxxxxxxxxxxxx>  Fri, 11 Aug 2017 08:33:23
+0100

** Changed in: zfs-linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1596835

Title:
  libnvpair.so.1 should be in /lib/, not /usr/lib/

Status in zfs-linux package in Ubuntu:
  Fix Released
Status in zfs-linux source package in Xenial:
  Fix Released
Status in zfs-linux source package in Zesty:
  Fix Released
Status in zfs-linux source package in Artful:
  Fix Released

Bug description:
  [SRU JUSTIFICATION XENIAL]

  
  Currently, in Ubuntu 16.04, the package libnvpair1linux puts libnvpair.so.1 in /usr/lib/, however, tools like zpool and zfs which are installed in /sbin/ need this library. According to the FHS this means the required libraries should be in /lib/ in order to allow the user to install /usr/ on a separate partition that is not immediately available after boot.

  This turns out to be a problem indeed. On one of my systems I had
  /usr/ on a ZFS filesystem (and /, /lib/, /sbin/, /bin/ on a separate
  ext4 partition). However, the system failed to boot: it hung while
  mounting the ZFS partitions which failed because zpool import didn't
  work as it couldn't find libnvpair.so.1.

  $ apt-cache policy libnvpair1linux
  libnvpair1linux:
    Installed: 0.6.5.6-0ubuntu9
    Candidate: 0.6.5.6-0ubuntu9
    Version table:
   *** 0.6.5.6-0ubuntu9 500
          500 http://nl.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages
          100 /var/lib/dpkg/status
       0.6.5.6-0ubuntu8 500
          500 http://nl.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

  $ apt-cache policy zfsutils-linux
  zfsutils-linux:
    Installed: 0.6.5.6-0ubuntu9
    Candidate: 0.6.5.6-0ubuntu9
    Version table:
   *** 0.6.5.6-0ubuntu9 500
          500 http://nl.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages
          100 /var/lib/dpkg/status
       0.6.5.6-0ubuntu8 500
          500 http://nl.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

  [FIX]
  Correctly set path by modifying the debian install files for the specific libraries to match the correct settings found in releases after Xenial.

  [TEST]
  The path /usr/lib/ should no longer be populated with zfs libraries and instead they are located after the fix in /lib as expected.

  [REGRESSION POTENTIAL]
  There could be other applications that are relying on the location of the libraries and so moving them could break these. However, they should not be using hard coded paths, so this regression is limited to badly coded applications that I am not aware of.

  The fix upgrade has been tested and double check with the ubuntu
  kernel team ZFS regression tests without issue.

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

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