昨天看到论坛有人提问：
error 1524: plugin ... in not loaded
问题相关信息：
1、安装mysql 5.7.16
2、修改my.ini为
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[client]
default-character-set=utf8
port = 3306
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
basedir = "D:\Program Files\MySQL\MySQL Server 5.7"
datadir = "D:\Program Files\MySQL\MySQL Server 5.7\data"
tmpdir = "D:\Program Files\MySQL\MySQL Server 5.7\data"
socket = "D:\Program Files\MySQL\MySQL Server 5.7\data\mysql.sock"
port = 3306
log-error = "D:\Program Files\MySQL\MySQL Server 5.7\data\mysql_error.log"
# server_id = .....
max_connections = 100
table_open_cache = 256
query_cache_size = 1M
tmp_table_size = 32M
thread_cache_size = 8
innodb_data_home_dir = "D:\Program Files\MySQL\MySQL Server 5.7\data\"
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 128M
innodb_buffer_pool_size = 128M
innodb_log_file_size = 10M
innodb_thread_concurrency = 16
innodb-autoextend-increment = 1000
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
join_buffer_size = 128M
sort_buffer_size = 32M
read_rnd_buffer_size = 32M
max_allowed_packet = 32M
explicit_defaults_for_timestamp = true
sql_mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
3、下载mysql 5.6.27，并解压
4、拷贝其中的data文件夹中的mysql文件夹至5.7.16版本的对应位置
5、安装mysql-connector-odbc-noinstall-5.3.6-winx64
6、用root登陆mysql一切正常；添加root密码，再次用root加密码登陆，失败，显示“”error 1524: plugin ... in not loaded"
7、在my.ini中添加了skip-grant-tables，然后不用密码登陆root
8、mysql>use mysql;
9、mysql>update user set password=PASSWORD("123456") where user='root';
10、修改成功，再次root加密码登陆，失败，还是同样的问题
解决方法：
修改mysql.user表的plugin字段为 mysql_native_plugin
update mysql.user set plugin = 'mysql_native_plugin'
