MySQL 跨版本主从复制时报错：ERROR 1794 (HY000): Slave is not configured or failed to initialize properly.

背景： zabbix 数据库迁移，搭建主从，主是5.6.25，从是5.7.15，流式备份应用 redo.log 之后，change master 和reset slave 时报出如下错误

mysql> CHANGE MASTER TO
    ->   MASTER_HOST='192.168.40.129',
    ->   MASTER_USER='repl',
    ->   MASTER_PASSWORD='repl_123',
    ->   MASTER_PORT=3306,
    ->   MASTER_LOG_FILE='mysql-bin.000005',       
    ->   MASTER_LOG_POS=749,
    ->   MASTER_AUTO_POSITION=0;
ERROR 1794 (HY000): Slave is not configured or failed to initialize properly. You must at least set --server-id to enable either a master or a slave. Additional error messages can be found in the MySQL error log.

原因：从 5.6.25 版本使用 innobackupex 备份，在 5.7.15 版本中应用恢复，ibd系统表需要重建

解决步骤：

1、drop 备份的 ibd表

use mysql
drop table slave_master_info;
drop table slave_relay_log_info;
drop table slave_worker_info;
drop table innodb_index_stats;
drop table innodb_table_stats;

2、重建

mysql> source /usr/local/mysql/share/mysql_system_tables.sql
Query OK, 0 rows affected, 1 warning (0.00 sec)

3、重启数据库

[root@zero02 data]# /etc/init.d/mysqld restart
Shutting down MySQL..                                      [  OK  ]
Starting MySQL..                                           [  OK  ]

　至此，问题解决，登陆数据库，重新 change master to 即可！

MySQL 跨版本主从复制时报错：ERROR 1794 (HY000): Slave is not configured or failed to initialize properly.

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