Crash occurred during "apt upgrade" w/ 500+ packages updating

[Todd Kaufmann]

Occurred as part of the upgrade,
briefly saw 'upstart' mentioned in details.

This is of little concern to me;
I am confident I can fix if necessary
though currently I use docker container(s)
for my mysql db needs.

However, may provide useful info to you.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mysql-server-5.7 5.7.19-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Wed Aug 16 19:18:25 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2012-06-06 (1898 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqld_safe_syslog.cnf:
 [mysqld_safe]
 syslog
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: ['performance_schema', 'ibdata1', 'ib_logfile1', 'auto.cnf', 'debian-5.7.flag', 'debian-5.5.flag', 'sys', 'ib_buffer_pool', 'test', 'ib_logfile0', 'bbf', 'mysql', 'mysql_upgrade_info']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-59-generic root=UUID=5980d7dd-a309-45b0-8f51-f8a4638d98b4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.19-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2016-11-15 (274 days ago)
modified.conffile..etc.logrotate.d.mysql-server: [modified]
mtime.conffile..etc.logrotate.d.mysql-server: 2017-06-24T12:54:08.791484
upstart.mysql.override: manual

[Christian Ehrhardt  (paelzer)]

Thanks Todd for your report.
This is in fact a known error being worked on.
The TL;DR is a race on the server being available.

I'll dup you to the main bug.