package mysql-server-5.7 5.7.15-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Ertan Günay]

This started to happen after xenity upgrade (I guess)
My MySql data folder is different to "\var\lib\mysql"
So after each mysql upgrade,
apt gives me an error.
after that
I set "datadir" of mysql to "\var\lib\mysql"
than I complete mysql upgrade.
than I stop mysql service
than I change "datadir" to normal value
and last, I start the mysql service.
.
After this procedure, apt function completes the upgrade procedure.

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: mysql-server-5.7 5.7.15-0ubuntu2
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
Date: Fri Oct 14 08:51:14 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-02-24 (232 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224)
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: ['mysql_upgrade_info', 'ib_logfile0', 'mysql', 'ib_buffer_pool', 'auto.cnf', 'performance_schema', 'debian-5.7.flag', 'sys', 'ibdata1', 'ib_logfile1']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.8.0-22-generic root=UUID=f57f2a94-225d-470e-b0a0-f4b2d63b8aca ro quiet splash quiet splash modprobe radeon.modeset=1 vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1
 apt 1.3.1
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.15-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to yakkety on 2016-10-14 (0 days ago)
modified.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: [modified]
mtime.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: 2016-10-14T09:06:23.247145

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Joshua Powers (powersj)]

From log:

Preparing to unpack .../python-samba_2%3a4.3.11+dfsg-0ubuntu0.16.04.1_i386.deb ...
  File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:
                             ^
SyntaxError: invalid syntax
dpkg: warning: subprocess old pre-removal script returned error exit status 1
dpkg: trying script from the new package instead ...
  File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:
                             ^
SyntaxError: invalid syntax

[Joshua Powers (powersj)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

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'. It appears from the error messages that you may have linked /usr/bin/python to run Python 3 and not Python 2. This is not suggested because may applications are expecting to use Python 2.

If indeed this is a local configuration problem, you can find pointers to get help for this sort of problem here: http://www.ubuntu.com/support/community

Or if you believe that this is really a bug, then you may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem, explain why you believe this is a bug in Ubuntu rather than a problem specific to your system, and then change the bug status back to New.

[Ertan Günay (ergunay)]

Thanks Joshua

[Launchpad Janitor (janitor)]

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