主从不同步故障案例一

唐伯虎

　　故障原因：
开发人员在主库上修改了一张表的结构，加了一个字段，从库由于各种原因没有同步过去，导致主从同步失败。
　　故障处理：
1、查看在从库上查看同步状态：

mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.10.100.100
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000009
Read_Master_Log_Pos: 917648
Relay_Log_File: mysqld-relay-bin.000017
Relay_Log_Pos: 778406
Relay_Master_Log_File: mysql-bin.000009
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB:
Replicate_Ignore_DB: mysql,information_schema,performance_schema,test,mysql,information_schema,performance_schema,test
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 1054
Last_Error: Error 'Unknown column 'js_code' in 'field list'' on query. Default database: 'web_platform'. Query: 'update act_id set js_code='确保该页面的PV埋点已经上报;__tj(node,snode,cid,w,'''','''','''');说明:remark;' where act_id=11'
Skip_Counter: 0
Exec_Master_Log_Pos: 906099
Relay_Log_Space: 790258
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 1054
Last_SQL_Error: Error 'Unknown column 'js_code' in 'field list'' on query. Default database: 'web_platform'. Query: 'update act_id set js_code='确保该页面的PV埋点已经上报;__tj(node,snode,cid,w,'''','''','''');说明:remark;' where act_id=11'
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
1 row in set (0.00 sec)

　　2、从上面可以看出表act_id的js_code字段在从库上没有，可以对比一下主库和从库这张表的结构：
查看主库：

mysql> desc act_id;
+-----------------+------------------+------+-----+---------+----------------+
| Field       | Type       | Null | Key | Default | Extra      |
+-----------------+------------------+------+-----+---------+----------------+
| act_id      | int(10) unsigned | NO   | PRI | NULL  | auto_increment |
| name      | varchar(512)   | NO   |   | NULL  |        |
| fields      | varchar(512)   | NO   |   | NULL  |        |
| js_code     | text       | NO   |   | NULL  |        |
| remark      | varchar(512)   | NO   |   | NULL  |        |
| create_user   | varchar(256)   | NO   |   | NULL  |        |
| duty_user_name  | varchar(256)   | NO   |   | NULL  |        |
| duty_user_email | varchar(256)   | YES  |   | NULL  |        |
| duty_user_phone | varchar(256)   | YES  |   | NULL  |        |
| create_time   | bigint(20)     | NO   |   | NULL  |        |
| update_time   | bigint(20)     | NO   |   | NULL  |        |
+-----------------+------------------+------+-----+---------+----------------+
11 rows in set (0.00 sec)

　　查看从库：

mysql> desc act_id;
+-----------------+------------------+------+-----+---------+----------------+
| Field       | Type       | Null | Key | Default | Extra      |
+-----------------+------------------+------+-----+---------+----------------+
| act_id      | int(10) unsigned | NO   | PRI | NULL  | auto_increment |
| name      | varchar(512)   | NO   |   | NULL  |        |
| fields      | varchar(512)   | NO   |   | NULL  |        |
| remark      | varchar(512)   | NO   |   | NULL  |        |
| create_user   | varchar(256)   | NO   |   | NULL  |        |
| duty_user_name  | varchar(256)   | NO   |   | NULL  |        |
| duty_user_email | varchar(256)   | YES  |   | NULL  |        |
| duty_user_phone | varchar(256)   | YES  |   | NULL  |        |
| create_time   | bigint(20)     | NO   |   | NULL  |        |
| update_time   | bigint(20)     | NO   |   | NULL  |        |
+-----------------+------------------+------+-----+---------+----------------+
10 rows in set (0.00 sec)

　　3、在正式处理故障之前要停掉主库和从库的slave进程（我的环境是做了双向同步，即主主同步）

mysql> slave stop;
Query OK, 0 rows affected (0.12 sec)

　　4、在从库上加缺少的字段：

alter table act_id add js_code text not Null AFTER fields;

　　5、启动从库的slave进程，查看主从状态：

mysql> slave start;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.10.100.100
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000009
Read_Master_Log_Pos: 917648
Relay_Log_File: mysqld-relay-bin.000117
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000009
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB: mysql,information_schema,performance_schema,test,mysql,information_schema,performance_schema,test
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 917648
Relay_Log_Space: 556
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
1 row in set (0.00 sec)

　　6、查看从库的master信息，在主库上从新change

从库上：
mysql> show master status \G
*************************** 1. row ***************************
File: mysql-bin.000009
Position: 235
Binlog_Do_DB:
Binlog_Ignore_DB: mysql,information_schema,performance_schema,test,mysql,information_schema,performance_schema,test
1 row in set (0.00 sec)

　　主库上：

mysql> change master to master_host="10.10.100.101", master_port=3306, master_user='slave', master_password='123456', master_log_file='mysql-bin.000009', master_log_pos=235;
1 row in set (0.00 sec)

　　7、对比主库和从库这两张表的结构和数据是否一样：
　　主库：

mysql> show create table act_id;
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table  | Create Table                                                                                                                                                                                                                                                                                           |
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| act_id | CREATE TABLE `act_id` (
`act_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(512) NOT NULL,
`fields` varchar(512) NOT NULL,
`js_code` text NOT NULL,
`remark` varchar(512) NOT NULL,
`create_user` varchar(256) NOT NULL,
`duty_user_name` varchar(256) NOT NULL,
`duty_user_email` varchar(256) DEFAULT NULL,
`duty_user_phone` varchar(256) DEFAULT NULL,
`create_time` bigint(20) NOT NULL,
`update_time` bigint(20) NOT NULL,
PRIMARY KEY (`act_id`),
UNIQUE KEY `act_id_UNIQUE` (`act_id`)
) ENGINE=MyISAM AUTO_INCREMENT=100 DEFAULT CHARSET=utf8 |
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> desc act_id;
+-----------------+------------------+------+-----+---------+----------------+
| Field       | Type       | Null | Key | Default | Extra      |
+-----------------+------------------+------+-----+---------+----------------+
| act_id      | int(10) unsigned | NO   | PRI | NULL  | auto_increment |
| name      | varchar(512)   | NO   |   | NULL  |        |
| fields      | varchar(512)   | NO   |   | NULL  |        |
| js_code     | text       | NO   |   | NULL  |        |
| remark      | varchar(512)   | NO   |   | NULL  |        |
| create_user   | varchar(256)   | NO   |   | NULL  |        |
| duty_user_name  | varchar(256)   | NO   |   | NULL  |        |
| duty_user_email | varchar(256)   | YES  |   | NULL  |        |
| duty_user_phone | varchar(256)   | YES  |   | NULL  |        |
| create_time   | bigint(20)     | NO   |   | NULL  |        |
| update_time   | bigint(20)     | NO   |   | NULL  |        |
+-----------------+------------------+------+-----+---------+----------------+
11 rows in set (0.00 sec)

　　从库：

mysql> show create table act_id;
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table  | Create Table                                                                                                                                                                                                                                                                                           |
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| act_id | CREATE TABLE `act_id` (
`act_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(512) NOT NULL,
`fields` varchar(512) NOT NULL,
`js_code` text NOT NULL,
`remark` varchar(512) NOT NULL,
`create_user` varchar(256) NOT NULL,
`duty_user_name` varchar(256) NOT NULL,
`duty_user_email` varchar(256) DEFAULT NULL,
`duty_user_phone` varchar(256) DEFAULT NULL,
`create_time` bigint(20) NOT NULL,
`update_time` bigint(20) NOT NULL,
PRIMARY KEY (`act_id`),
UNIQUE KEY `act_id_UNIQUE` (`act_id`)
) ENGINE=MyISAM AUTO_INCREMENT=100 DEFAULT CHARSET=utf8 |
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> desc act_id;
+-----------------+------------------+------+-----+---------+----------------+
| Field       | Type       | Null | Key | Default | Extra      |
+-----------------+------------------+------+-----+---------+----------------+
| act_id      | int(10) unsigned | NO   | PRI | NULL  | auto_increment |
| name      | varchar(512)   | NO   |   | NULL  |        |
| fields      | varchar(512)   | NO   |   | NULL  |        |
| js_code     | text       | NO   |   | NULL  |        |
| remark      | varchar(512)   | NO   |   | NULL  |        |
| create_user   | varchar(256)   | NO   |   | NULL  |        |
| duty_user_name  | varchar(256)   | NO   |   | NULL  |        |
| duty_user_email | varchar(256)   | YES  |   | NULL  |        |
| duty_user_phone | varchar(256)   | YES  |   | NULL  |        |
| create_time   | bigint(20)     | NO   |   | NULL  |        |
| update_time   | bigint(20)     | NO   |   | NULL  |        |
+-----------------+------------------+------+-----+---------+----------------+
11 rows in set (0.00 sec)

　　处理完成。

　　

[MySQL] 主从不同步故障案例一

相关帖子

腾讯视频扫码在哪里找到

电脑关不了机按哪个键可以关机?

预留手机号修改方法

电脑竖屏了变回来如何操作

502错误原因修复

迅雷影音关闭弹幕步骤

电脑蓝屏是什么原因及解决方法

ModelBox开发体验：使用YOLOv3做口罩检测

文件下载就被删除？Win10由于系统原因文件已被删除

Discuz X重置应用中心数据的方法

唐伯虎 LV4