mysql主从复制如何跳过报错

mysql主从复制如何跳过报错
⼀、传统binlog主从复制，跳过报错⽅法
mysql> stop slave;
mysql> set global sql_slave_skip_counter = 1;
mysql> start slave;
mysql> show slave status \G
⼆、GTID主从复制，跳过报错⽅法
mysql> stop slave； #先关闭slave复制；
mysql> change master to ...省略... #配置主从复制；
mysql> show slave status\G #查看主从状态；
发现报错：
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.19.195.212
Master_User: master-slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000021
Read_Master_Log_Pos: 194
Relay_Log_File: nginx-003-relay-bin.000048
Relay_Log_Pos: 454
Relay_Master_Log_File: mysql-bin.000016
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: 1007
Last_Error: Error 'Can't create database 'code'; database exists' on query. Default database: 'code'. Query: 'create database code'
Skip_Counter: 0
Exec_Master_Log_Pos: 8769118
Relay_Log_Space: 3500
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: 1007
Last_SQL_Error: Error 'Can't create database 'code'; database exists' on query. Default database: 'code'. Query: 'create database code' Replicate_Ignore_Server_Ids:
Master_Server_Id: 100
Master_UUID: fea89052-11ef-11eb-b241-00163e00a190
Master_Info_File: /usr/local/mysql/data/
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: 201022 09:31:29
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: fea89052-11ef-11eb-b241-00163e00a190:8-5617
Executed_Gtid_Set: a56c9b04-11f1-11eb-a855-00163e128853:1-11224,
fea89052-11ef-11eb-b241-00163e00a190:1-5614
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.01 sec)
可以看到 Slave_SQL_Running 为 NO，表⽰运⾏取回的⼆进制⽇志出了问题；
在 Last_Error 中也可以看到⼤概的报错；（因为我之前的操作，⼤概可以判断出是因为主库的⼆进制⽇志中有创建code库的sql，⽽从库上我已经创建了这个库，应该是产⽣了冲突；）
解决⽅法：
1、如果清楚⾃⼰之前的操作，可以将从库中产⽣冲突的库删除；
2、或者通过跳过GTID报错的事务的⽅法
--- 通过 Last_SQL_Errno 报错编号查询具体的报错事务
mysql> select * from performance_schema.replication_applier_status_by_worker where LAST_ERROR_NUMBER=1007\G
*************************** 1. row ***************************
CHANNEL_NAME:
WORKER_ID: 0
THREAD_ID: NULL
SERVICE_STATE: OFF
LAST_SEEN_TRANSACTION: fea89052-11ef-11eb-b241-00163e00a190:5615
LAST_ERROR_NUMBER: 1007
LAST_ERROR_MESSAGE: Error 'Can't create database 'code'; database exists' on query. Default database: 'code'. Query: 'create database code'
LAST_ERROR_TIMESTAMP: 2020-10-22 09:31:29
1 row in set (0.00 sec)
mysql> stop slave;
Query OK, 0 rows affected (0.00 sec)
--- 跳过查找到报错的事务（LAST_SEEN_TRANSACTION 的值）
mysql> set @@session.gtid_next='fea89052-11ef-11eb-b241-00163e00a190:5615';
Query OK, 0 rows affected (0.00 sec)
mysql> begin;
Query OK, 0 rows affected (0.00 sec)
--- 提交⼀个空的事务，因为设置gtid_next后，gtid的⽣命周期开始了，必须通过显性的提交⼀个事务来结束；
mysql> commit;
Query OK, 0 rows affected (0.00 sec)
--- 设置回⾃动模式；
mysql> set @@session.gtid_next=automatic;
Query OK, 0 rows affected (0.00 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
通过以上步骤，就跳过了这次的GTID报错的事务，如果 start slave 之后还是有报错，那么就按照此步骤继续跳过；
经验丰富的话，基本不⽤查询事务，通过 Executed_Gtid_Set 就可以判断出报错的事务是 fea89052-11ef-11eb-
b241-00163e00a190:5615 了；因为执⾏事务，到 fea89052-11ef-11eb-b241-00163e00a190:1-5614 的时候报错了，应该可以判断是 5615事务出现的错误；
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