MySQL error 1396_Last

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MySQL 主备数据库切换报错1396处理方法，操作步骤如下：

mysql> show slave status \G;

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 196.55.3.180

Master_User: repl

Master_Port: 3311

Connect_Retry: 60

Master_Log_File: mysql-bin.000002

Read_Master_Log_Pos: 1674

Relay_Log_File: relay-log.000002

Relay_Log_Pos: 367

Relay_Master_Log_File: mysql-bin.000001

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: 1396

Last_Error: Error ‘Operation CREATE USER failed for ‘repl‘@‘%‘‘ on query. Default database: ‘‘. Query: ‘CREATE USER ‘repl‘@‘%‘ IDENTIFIED WITH ‘mysql_native_password‘ AS ‘*2813999EE1B5ABB4D8C2D12234F0649DF6A9BC19‘‘

Skip_Counter: 0

Exec_Master_Log_Pos: 154

Relay_Log_Space: 2217

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: 1396

Last_SQL_Error: Error ‘Operation CREATE USER failed for ‘repl‘@‘%‘‘ on query. Default database: ‘‘. Query: ‘CREATE USER ‘repl‘@‘%‘ IDENTIFIED WITH ‘mysql_native_password‘ AS ‘*2813999EE1B5ABB4D8C2D12234F0649DF6A9BC19‘‘

Replicate_Ignore_Server_Ids:

Master_Server_Id: 10003

Master_UUID: 84aa2159-14f8-11ea-bc00-00505687741b

Master_Info_File: mysql.slave_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: 191204 19:51:57

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set: 1b4e1296-14f7-11ea-8332-005056873bbd:1-2,

84aa2159-14f8-11ea-bc00-00505687741b:1

Executed_Gtid_Set: 183c6bb2-5f65-11e9-b3cf-0050568745fc:1-8807

Auto_Position: 1

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

1 row in set (0.00 sec)

ERROR:

No query specified

mysql> show master status;

+——————+———-+————–+——————+———————————————+

+——————+———-+————–+——————+———————————————+

+——————+———-+————–+——————+———————————————+

1 row in set (0.00 sec)

mysql> select * from performance_schema.replication_applier_status_by_worker where LAST_ERROR_NUMBER=1396;

+————–+———–+———–+—————+—————————————-+——————-+————————————————————————————————————————————————————————————————————+———————-+

| | 0 | NULL | OFF | 1b4e1296-14f7-11ea-8332-005056873bbd:1 | 1396 | Error ‘Operation CREATE USER failed for ‘repl‘@‘%‘‘ on query. Default database: ‘‘. Query: ‘CREATE USER ‘repl‘@‘%‘ IDENTIFIED WITH ‘mysql_native_password‘ AS ‘*2813999EE1B5ABB4D8C2D12234F0649DF6A9BC19‘‘ | 2019-12-04 20:02:13 |

1 row in set (0.00 sec)

mysql> stop slave;