环境:ubuntu 14.04.5 LTS amd64
MySQL版本:5.7.16
1. performance_schema结构错误
[ERROR] Native table ‘performance_schema’.’events_transactions_history_long’ has the wrong structure
升级时出现,可使用mysql_upgrade修复,如下:
root@localhost:~# mysql_upgrade -u root -p
2.innodb已存在
[ERROR] Function ‘innodb’ already exists
分析原因:mysql-server初始化脚本添加了以下的插件表,而实际上MySQL中已包含这些插件。
mysql> select * from mysql.plugin;
+-----------+-----------------+
| name | dl |
+-----------+-----------------+
| innodb | ha_innodb.so |
| federated | ha_federated.so |
| blackhole | ha_blackhole.so |
| archive | ha_archive.so |
+-----------+-----------------+
4 rows in set (0.00 sec)
解决方法:执行命令删除这4个插件即可:
mysql> delete from mysql.plugin;
Query OK, 4 rows affected (0.00 sec)
清除日志,重启MySQL服务,可以看到,MySQL无错运行。
3.无HOME目录
No directory, logging in with HOME=/
未指定mysql目录/var/lib/mysql,在/etc/passwd中添加,即将/etc/passwd中的
mysql:x:106:111:MySQL Server,,,:/nonexistent:/bin/false
修改为
mysql:x:106:111:MySQL Server,,,:/var/lib/mysql:/bin/false