2015-09-17 00:31:55 3c786628700 InnoDB: Error: Column last_update in table "mysql"."innodb_table_stats" is INT UNSIGNED NOT NULL but should be BINARY(4) NOT NULL (type mismatch). 2015-09-17 00:31:55 3c786628700 InnoDB: Error: Fetch of persistent statistics requested for table "mysql"."gtid_slave_pos" but the required system tables mysql.innodb_table_stats and mysql.innodb_index_stats are not present or have unexpected structure. Using transient stats instead. Reproducible: Always Solution: mysql> ALTER TABLE `mysql`.`innodb_table_stats` MODIFY `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; mysql> ALTER TABLE `mysql`.`innodb_index_stats` MODIFY `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; I haven't started mysql_upgrade, since it wasn't a major version bump.
You must run mysql_upgrade on every minor version change. 10.0 -> 10.1 requires it. This has always been true for dev-db/mysql as well. 5.5 -> 5.6 and soon 5.6 -> 5.7
