mysql upgrade 失败,mysql_upgrade-致命错误：升级失败

I recently had my MySQL server upgraded from 5.1 to 5.5 and I'm trying to upgrade my databases using mysql_upgrade but I keep getting this error:

[root@ip-??-???-???-??? ~]# mysql_upgrade -uadmin -p

Enter password:

Looking for 'mysql' as: mysql

Looking for 'mysqlcheck' as: mysqlcheck

FATAL ERROR: Upgrade failed

I can't figure why this won't run. MySQL Server is running.

解决方案

I had the same issue going from MySQL 5.5 to 5.6 on OS X (installed via MacPorts).

Seems that mysql_upgrade needs to be run as user root and only root and a password needs to be set up for the user. Any other user with administrative privileges does not seem work.

So the only valid command seems to be: mysql_upgrade -u root -p

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