如何解决 MySQL 主从数据库没有同步的问题？

mysql>show processlist;

show master status;

mysql> show master status;
+-------------------+----------+--------------+-------------------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB              |
+-------------------+----------+--------------+-------------------------------+
| mysqld-bin.000001 |     3260 |              | mysql,test,information_schema |
+-------------------+----------+--------------+-------------------------------+
1 row in set (0.00 sec)

mysql> show slave status\G                                                
 
Slave_IO_Running: Yes
Slave_SQL_Running: No

stop slave;
 
#表示跳过一步错误，后面的数字可变
set global sql_slave_skip_counter =1;
start slave;

mysql> show slave status\G
Slave_IO_Running: Yes
Slave_SQL_Running: Yes

mysql> flush tables with read lock;

mysqldump -uroot -p -hlocalhost > mysql.bak.sql

mysql> show master status;
+-------------------+----------+--------------+-------------------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB              |
+-------------------+----------+--------------+-------------------------------+
| mysqld-bin.000001 |     3260 |              | mysql,test,information_schema |
+-------------------+----------+--------------+-------------------------------+
1 row in set (0.00 sec)

scp mysql.bak.sql root@192.168.128.101:/tmp/

mysql> stop slave;

mysql> source /tmp/mysql.bak.sql

change master to master_host = '192.168.128.100', master_user = 'rsync',  master_port=3306, master_password='', master_log_file =  'mysqld-bin.000001', master_log_pos=3260;

mysql> start slave;

mysql> show slave status\G  
Slave_IO_Running: Yes
Slave_SQL_Running: Yes

UNLOCK TABLES;