1062错误----主键冲突，出现这种情况就是从库出现插入操作，主库又重新来了一遍，iothread没问题，sqlthread出错

解决方案：mysql> stop slave;

mysql> set global sql_slave_skip_counter=1;

mysql> start slave;

故障模拟：

从库如果误插入mysql> insert into helei(text) values('iii');

Query OK, 1 row affected (0.28 sec)

mysql> select * from helei;

+----+------+

| id | text |

+----+------+

|  1 | aa

|

|  2 | bb

|

|  3 | cc

|

|  4 | ee

|

|  5 | ff

|

|  6 | gg

|

|  7 | hh

|

|  8 | iii

|

+----+------+

8 rows in set (0.00

sec)

mysql> show slave

status\G

***************************

1. row ***************************

Slave_IO_State: Waiting for

master to send event

Master_Host: 192.168.1.250

Master_User: mysync

Master_Port: 2503306

Connect_Retry: 60

Master_Log_File: mysql-bin.000005

Read_Master_Log_Pos: 2509

Relay_Log_File:

HE1-relay-bin.000005

Relay_Log_Pos: 480

Relay_Master_Log_File: mysql-bin.000005

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

这时候从库是正常的，但由于从库私自插入数据，已经和主库不一致，如果这时主库也插入相同的数据

主库此时没有8,iii这条记录

mysql> select * from helei;

+----+------+

| id | text |

+----+------+

|  1 | aa

|

|  2 | bb

|

|  3 | cc

|

|  4 | ee

|

|  5 | ff

|

|  6 | gg

|

|  7 | hh

|

+----+------+

7 rows in set (0.00

sec)

mysql>show slave status\G

***************************

1. row ***************************

Slave_IO_State: Waiting for

master to send event

Master_Host: 192.168.1.250

Master_User: mysync

Master_Port: 2503306

Connect_Retry: 60

Master_Log_File: mysql-bin.000005

Read_Master_Log_Pos: 2709

Relay_Log_File:

HE1-relay-bin.000005

Relay_Log_Pos: 480

Relay_Master_Log_File: mysql-bin.000005

Slave_IO_Running: Yes

Slave_SQL_Running: No

Replicate_Do_DB:

Replicate_Ignore_DB:

Replicate_Do_Table:

Replicate_Ignore_Table:

Replicate_Wild_Do_Table:

Replicate_Wild_Ignore_Table:

Last_Errno: 1062

Last_Error: Could not execute Write_rows event on table test.helei;

Duplicate entry '8' for key 'PRIMARY', Error_code: 1062; handler error

HA_ERR_FOUND_DUPP_KEY; the event's master log mysql-bin.000005, end_log_pos

2678

Skip_Counter: 0

Exec_Master_Log_Pos: 2509

Relay_Log_Space: 851

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: 1062

Last_SQL_Error: Could not

execute Write_rows event on table test.helei; Duplicate entry '8' for key

'PRIMARY', Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event's

master log mysql-bin.000005, end_log_pos 2678

Replicate_Ignore_Server_Ids:

Master_Server_Id: 2503306

Master_UUID:

f7c96432-f665-11e5-943f-000c2967a454

Master_Info_File:

/data/mysql/master.info

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State:

Master_Retry_Count: 86400

Master_Bind:

Last_IO_Error_Timestamp:

Last_SQL_Error_Timestamp: 160331 09:12:02

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set:

Executed_Gtid_Set:

Auto_Position: 0

1 row in

set (0.00 sec)

1062错误----主键冲突，出现这种情况就是从库出现插入操作，主库又重新来了一遍，iothread没问题，sqlthread出错

出现这样的问题，先停从库，set跳过这条事务

HE1从库操作

mysql> stop slave;

Query OK, 0 rows

affected (0.26 sec)

mysql> set global sql_slave_skip_counter=1;(这里写10也是一样的,最好不用这种方法，用pt-slave-restart，无需手动stop/start slave)

Query OK, 0 rows

affected (0.30 sec)

mysql> start slave;

Query OK, 0 rows

affected (0.04 sec)

mysql> show slave status\G

***************************

1. row ***************************

Slave_IO_State: Waiting for

master to send event

Master_Host: 192.168.1.250

Master_User: mysync

Master_Port: 2503306

Connect_Retry: 60

Master_Log_File: mysql-bin.000005

Read_Master_Log_Pos: 2909

Relay_Log_File:

HE1-relay-bin.000006

Relay_Log_Pos: 283

Relay_Master_Log_File: mysql-bin.000005

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Replicate_Do_DB:

Replicate_Ignore_DB:

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: 2909

Relay_Log_Space: 1214

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: 2503306

Master_UUID:

f7c96432-f665-11e5-943f-000c2967a454

Master_Info_File:

/data/mysql/master.info

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State: Slave has read

all relay log; waiting for the slave I/O thread to update it

Master_Retry_Count: 86400

Master_Bind:

Last_IO_Error_Timestamp:

Last_SQL_Error_Timestamp:

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set:

Executed_Gtid_Set:

Auto_Position: 0

1 row in set (0.00

sec)