Am 20.12.2013 13:22, schrieb Frank Röhm: > day before yesterday I updated my MySQL Server 5.5.34 to MariaDB 5.5.34 > on my Ubuntu 12.04 Server. > > All went fine but next day, I noticed that the automatic backup script > (automysqlbackup) had errors, I read: > > mysqldump: Couldn't execute 'SELECT /*!40001 SQL_NO_CACHE */ * FROM > `EVENTS`': Cannot proceed because system tables used by Event Scheduler > were found damaged at server start (1577) > mysqldump: Couldn't execute 'show events': Cannot proceed because system > tables used by Event Scheduler were found damaged at server start (1577)
looks like you *did not* run "mysql_upgrade -u root -p" after the migration! you should do this after *any* mysql/mariadb update directly after the service was restarted to prevent from hidden *serious* problems like root not allowed to use several grant-commands because missing columns in the permission tables and such nasty things
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