**Comment from Launchpad by: Tomislav Plavcic on: 28-04-2016 08:13:49

5.7 unaffected as it doesn't run mysql_upgrade automatically.

**Comment from Launchpad by: Nilnandan Joshi on: 26-05-2015 09:36:51

https://bugs.launchpad.net/percona-server/+bug/1236938 has been merged in newer versions.

So as per last comment in this bug, https://bugs.launchpad.net/percona-server/+bug/1218664

If using enforce-storage-engine, we must either disable it before doing mysql_upgrade or perform mysql_upgrade with server started with --skip-grants-tables. This changes is not done in debian-start yet.

nilnandan@desktop:~$ cat /etc/mysql/debian-start
#!/bin/bash
#

1. This script is executed by "/etc/init.d/mysql" on every (re)start.

2. Changes to this file will be preserved when updating the Debian package.
   #

PERCONA_PREFIX=/usr

source "${PERCONA_PREFIX}"/share/mysql/debian-start.inc.sh

MYSQL="${PERCONA_PREFIX}/bin/mysql --defaults-file=/etc/mysql/debian.cnf"
MYADMIN="${PERCONA_PREFIX}/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf"
MYUPGRADE="${PERCONA_PREFIX}/bin/mysql_upgrade --defaults-extra-file=/etc/mysql/debian.cnf"
MYCHECK="${PERCONA_PREFIX}/bin/mysqlcheck --defaults-file=/etc/mysql/debian.cnf"
MYCHECK_SUBJECT="WARNING: mysqlcheck has found corrupt tables"
MYCHECK_PARAMS="--all-databases --fast --silent"
MYCHECK_RCPT="root"

1. The following commands should be run when the server is up but in background

2. where they do not block the server start and in one shell instance so that

3. they run sequentially. They are supposed not to echo anything to stdout.

4. If you want to disable the check for crashed tables comment

5. "check_for_crashed_tables" out.

6. (There may be no output to stdout inside the background process!)
   echo "Checking for corrupt, not cleanly closed and upgrade needing tables."
   (
   upgrade_system_tables_if_necessary;
   check_root_accounts;
   check_for_crashed_tables;
   ) >&2 &

exit 0

nilnandan@desktop:~