package mysql-common 5.7.17-0ubuntu0.16.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[Bagus Satria]

package mysql-common 5.7.17-0ubuntu0.16.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mysql-common 5.7.17-0ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.8.0-46.49~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-46-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Sun Apr 23 23:52:30 2017
Dependencies:

DpkgHistoryLog:
 Start-Date: 2017-04-23 23:52:27
 Commandline: apt-get install mysql-server
 Requested-By: strwrd (1000)
 Install: mysql-client-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, automatic), libevent-core-2.0-5:amd64 (2.0.21-stable-2ubuntu0.16.04.1, automatic), mysql-server-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, automatic), mysql-server:amd64 (5.7.17-0ubuntu0.16.04.2), mysql-client-core-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, automatic), mysql-common:amd64 (5.7.17-0ubuntu0.16.04.2, automatic), mysql-server-core-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, automatic)
DuplicateSignature:
 package:mysql-common:5.7.17-0ubuntu0.16.04.2
 Setting up mysql-common (5.7.17-0ubuntu0.16.04.2) ...
 update-alternatives: error: alternative path /etc/mysql/my.cnf.fallback doesn't exist
 dpkg: error processing package mysql-common (--configure):
  subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
 [mysqldump]
 quick
 quote-names
 max_allowed_packet = 16M
MySQLConf.etc.mysql.mysql.conf.d.mysqld_safe_syslog.cnf:
 [mysqld_safe]
 syslog
MySQLVarLibDirListing: ['ibdata1', 'ib_buffer_pool', 'ib_logfile0', 'ib_logfile1', 'auto.cnf', 'debian-5.7.flag', 'sys', 'mysql', 'performance_schema']
PackageArchitecture: all
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.8.0-46-generic root=UUID=a69b15e3-c0a4-441a-96b4-b3fbb2beaea0 ro quiet splash acpi_osi= vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: mysql-5.7
Title: package mysql-common 5.7.17-0ubuntu0.16.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)

[Christian Ehrhardt  (paelzer)]

Hi Bagus,
thank you for your report and your help to make Ubuntu better.

From your log what puzzles me most is the error:
update-alternatives: error: alternative path /etc/mysql/my.cnf.fallback doesn't exist

This file is part of mysql-common and usually around.
I wonder what do the following commands report you:
$ update-alternatives --display my.cnf
$ dpkg --verify mysql-common
$ dpkg --verify mysql-server-5.7

I don't think it really applies as no deleted conffiles are listed, but if you want to reinstall the packages in a way that they would re-populate any accidentially deleted config files you could try:
$ apt-get install --reinstall -o Dpkg::Options::="--force-confmiss" mysql-common mysql-server-5.7

Since it seems likely to me that this is a local configuration problem, rather than a bug in Ubuntu, I'm marking this bug as Incomplete for now until you provide the requested extra information.

If the suggested workarounds/checks already uncover the issue please still report back so others can find the solution here.

[Launchpad Janitor (janitor)]

[Expired for mysql-5.7 (Ubuntu) because there has been no activity for 60 days.]