package mysql-server-5.7 5.7.18-0ubuntu0.17.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Caujka]

I was debugging a jboss application when mysql reported a crash.

ProblemType: Package
DistroRelease: Ubuntu 17.04
Package: mysql-server-5.7 5.7.18-0ubuntu0.17.04.1
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
Date: Thu Apr 27 18:19:20 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-04-15 (11 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Beta amd64 (20170321)
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: ['enterprisemanager', 'performance_schema', 'sys', 'ibdata1', 'cas_ticket_registry_em', 'ib_logfile1', 'debian-5.7.flag', 'auto.cnf', 'mysql', 'ib_logfile0', 'ib_buffer_pool']
ProcCmdline: BOOT_IMAGE=/vmlinuz-4.10.0-20-generic.efi.signed root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.10ubuntu2
 apt 1.4
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.18-0ubuntu0.17.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
upstart.mysql.override: manual

[Launchpad Janitor (janitor)]

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

[Christian Ehrhardt  (paelzer)]

Hi,
thank you for your report and your help to make Ubuntu better.
I'm convinced this is a duplicate of bug 1670629 and will flag it like this.

In general we are reworking the upgrade handling - I'd be very pleased if you could help verify that once it is ready.

Until then given the reports we have seen so far simply retrying helps quite often.