Public bug reported:
Hello,
The corresponding apt error message looks like this:
...
Do you want to continue? [Y/n]
Setting up mysql-server-5.7 (5.7.17-0ubuntu0.16.04.1) ...
Renaming removed key_buffer and myisam-recover options (if present)
mysql_upgrade: Got error: 2002: Can't connect to local MySQL server through
socket '/var/run/mysqld/mysqld.sock' (2) while connecting to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
dpkg: error processing package mysql-server-5.7 (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on mysql-server-5.7; however:
Package mysql-server-5.7 is not configured yet.
dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup
error from a previous failure.
Errors were encountered while processing:
mysql-server-5.7
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
The workaround is to put a `sleep 3` on the 320. line of
mysql-server-5.7.postinst script (right before `mysql_upgrade
--defaults-file=/etc/mysql/debian.cnf || result=$?` )
The root cause seems to be that invoke-rc.d does not execute systemctl
--wait, and systemctl without wait doesn't wait until the database
server daemon is up and listening.
And of course it could be mitigated by using a systemd socket for mysql.
** Affects: mysql-5.7 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1670629
Title:
postinst runs mysql_upgrade before server is properly started
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