*** This bug is a duplicate of bug 1574168 ***
https://bugs.launchpad.net/bugs/1574168
Also receiving this error. A ton of errors really. It also failed to
update several MySQL tables in information_schema and performance_schema
and many other things. Over a series of hours I got MySQL to work by
running mysql_upgrade and doing several other things, some of which are
linked to below, sorry I did not create exact steps:
http://askubuntu.com/questions/705458/ubuntu-15-10-mysql-error-1524-unix-socket
http://stackoverflow.com/questions/31967527/table-performance-schema-session-variables-doesnt-exist
Finally I noticed this:
Setting up mysql-server-5.7 (5.7.12-0ubuntu1.1) ...
mysql_upgrade: Got error: 1045: Access denied for user
'debian-sys-maint'@'localhost' (using password: YES) while connecting to the
MySQL server
SOLUTION:
CREATE USER 'debian-sys-maint'@'localhost' IDENTIFIED BY '***';GRANT ALL
PRIVILEGES ON *.* TO 'debian-sys-maint'@'localhost' IDENTIFIED BY '***' REQUIRE
NONE WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0
MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;
Then: sudo apt-get upgrade
Anyways good luck folks, this took me several hours to move through this
hell. I believe something messed up with the install, the debian-sys-
maint user was not created, so system could not update MySQL schema
which probably lead to a whole host of other errors. Be sure to check
your logs so you can resolve this quicker than it took me.
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https://bugs.launchpad.net/bugs/1573279
Title:
package mysql-server-5.7 5.7.11-0ubuntu6 failed to install/upgrade:
subprocess installed post-installation script returned error exit
status 1 during release upgrade
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