Mysql主从同步问题汇总
data-1-1主机是master,data-1-2是slave
Last_IO_Errno: 1236
slave查看show slave status\G;
显示Last_IO_Errno: 1236
模拟方法:master上执行reset master
- [root@data-1-1 ~]# tail -3 /data/3306/mysql-bin.index
- /data/3306/mysql-bin.000020
- /data/3306/mysql-bin.000021
- /data/3306/mysql-bin.000022
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "reset master;"
- [root@data-1-1 ~]# tail -3 /data/3306/mysql-bin.index
- /data/3306/mysql-bin.000001
- [root@data-1-1 ~]# ll /data/3306/
- total 36
- drwxr-xr-x 10 mysql mysql 4096 Jan 16 22:03 data
- -rw-r--r-- 1 mysql mysql 1899 Oct 29 2013 my.cnf
- -rwx------ 1 mysql mysql 1310 Jan 10 19:14 mysql
- -rw-rw---- 1 mysql mysql 107 Jan 17 16:55 mysql-bin.000001
- -rw-rw---- 1 mysql mysql 28 Jan 17 16:55 mysql-bin.index
- -rw-rw---- 1 mysql mysql 6 Jan 11 00:04 mysqld.pid
- -rw-r----- 1 mysql root 10264 Jan 14 00:10 mysql_oldboy3306.err
- srwxrwxrwx 1 mysql mysql 0 Jan 11 00:04 mysql.sock
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "create database t99;"
slave上检查同步状态
- mysql> show slave status\G;
- *************************** 1. row ***************************
- Slave_IO_State:
- Master_Host: 10.0.1.81
- Master_User: rep
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000022
- Read_Master_Log_Pos: 107
- Relay_Log_File: data-1-2-relay-bin.000010
- Relay_Log_Pos: 253
- Relay_Master_Log_File: mysql-bin.000022
- Slave_IO_Running: No
- 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: 107
- Relay_Log_Space: 455
- 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: 1236
- Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'could not find next log; the first event 'mysql-bin.000019' at 556,
the last event read from '/data/3306/mysql-bin.000022' at 107, the last byte read from '/data/3306/mysql-bin.000022' at 107.'- Last_SQL_Errno: 0
- Last_SQL_Error:
- Replicate_Ignore_Server_Ids:
- Master_Server_Id: 1
- 1 row in set (0.00 sec)
- ERROR:
- No query specified
问题原因:
根据主从同步的原理,slave向master请求binlog时,master不仅把log发送过来,还会发送日志文件是哪个,以及下一次读取的位置信息。
master上执行了reset master命令后,导致日志文件从1开始了,这样从库根据之前获取的位置信息就不存在了,自然报错
解决方法:
master上找出当前日志文件最接近上一次slave同步的位置。下面可以找到是at 4,也可以使用at 107
- [root@data-1-1 ~]# mysqlbinlog /data/3306/mysql-bin.000001 >bin-1.log
- [root@data-1-1 ~]# less bin-1.log
- [root@data-1-1 ~]# cat bin-1.log
- /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
- /*!40019 SET @@session.max_insert_delayed_threads=0*/;
- /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
- DELIMITER /*!*/;
- # at 4
- #170117 16:55:09 server id 1 end_log_pos 107 Start: binlog v 4, server v 5.5.32-log created 170117 16:55:09 at startup
- # Warning: this binlog is either in use or was not closed properly.
- ROLLBACK/*!*/;
- BINLOG '
- 7dt9WA8BAAAAZwAAAGsAAAABAAQANS41LjMyLWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
- AAAAAAAAAAAAAAAAAADt231YEzgNAAgAEgAEBAQEEgAAVAAEGggAAAAICAgCAA==
- '/*!*/;
- # at 107
- #170117 16:56:18 server id 1 end_log_pos 188 Query thread_id=150 exec_time=0 error_code=0
- SET TIMESTAMP=1484643378/*!*/;
- SET @@session.pseudo_thread_id=150/*!*/;
- SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
- SET @@session.sql_mode=0/*!*/;
- SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
- /*!\C utf8 *//*!*/;
- SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;
- SET @@session.lc_time_names=0/*!*/;
- SET @@session.collation_database=DEFAULT/*!*/;
- create database t99
- /*!*/;
- DELIMITER ;
- # End of log file
- ROLLBACK /* added by mysqlbinlog */;
- /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
- /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
- [root@data-1-1 ~]#
slave执行如下过程
stop slave;
change master to master_log_file='mysql-bin.000001',master_log_pos=107;
start slave;
show slave status\G;
- mysql> stop slave;
- Query OK, 0 rows affected (0.01 sec)
- mysql> change master to master_log_file='mysql-bin.000001',master_log_pos=107;
- Query OK, 0 rows affected (0.03 sec)
- mysql> start slave;
- 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: 10.0.1.81
- Master_User: rep
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000001
- Read_Master_Log_Pos: 188
- Relay_Log_File: data-1-2-relay-bin.000002
- Relay_Log_Pos: 334
- Relay_Master_Log_File: mysql-bin.000001
- 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: 188
- Relay_Log_Space: 493
- 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)
- ERROR:
- No query specified
- mysql>
额外补充点:
这个reset master 会影响和它直接连接的slave,而不是影响slave级联的slave。
比如下面主从架构,master上执行reset master,slave1会被影响到,报错,slave2不出报错,但是slave2和slave1数据库里数据都是一样的。
master--->slave1---->slave2
因为slave1作为级联的中继端,会产生binlog,而slave2获取的是slave1的binlog
Last_SQL_Errno: 1007
模拟方法:
slave2从库执行reset slave
(master--->slave1---->slave2)此处我是在slave2上执行的reset slave操作,slave2在data-1-1机器上,slave1在data-1-2机器上
- mysql> reset slave;
- ERROR 1198 (HY000): This operation cannot be performed with a running slave; run STOP SLAVE first
- mysql> stop slave;
- Query OK, 0 rows affected (0.01 sec)
- mysql> reset slave;
- Query OK, 0 rows affected (0.01 sec)
- mysql> show slave status\G;
- *************************** 1. row ***************************
- Slave_IO_State:
- Master_Host: 10.0.1.82
- Master_User: rep
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File:
- Read_Master_Log_Pos: 4
- Relay_Log_File: relay-bin.000001
- Relay_Log_Pos: 4
- Relay_Master_Log_File:
- Slave_IO_Running: No
- Slave_SQL_Running: No
- Replicate_Do_DB:
- Replicate_Ignore_DB: mysql
- 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: 0
- Relay_Log_Space: 126
- 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: 0
- Last_SQL_Error:
- Replicate_Ignore_Server_Ids:
- Master_Server_Id: 12
- 1 row in set (0.00 sec)
- ERROR:
- No query specified
继续同步,出现1007报错
- mysql> start slave;
- Query OK, 0 rows affected (0.02 sec)
- mysql> show slave status\G;
- *************************** 1. row ***************************
- Slave_IO_State: Waiting for master to send event
- Master_Host: 10.0.1.82
- Master_User: rep
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000004
- Read_Master_Log_Pos: 348
- Relay_Log_File: relay-bin.000006
- Relay_Log_Pos: 253
- Relay_Master_Log_File: mysql-bin.000004
- Slave_IO_Running: Yes
- Slave_SQL_Running: No
- Replicate_Do_DB:
- Replicate_Ignore_DB: mysql
- Replicate_Do_Table:
- Replicate_Ignore_Table:
- Replicate_Wild_Do_Table:
- Replicate_Wild_Ignore_Table:
- Last_Errno: 1007
- Last_Error: Error 'Can't create database 'tt'; database exists' on query. Default database: 'tt'. Query: 'create database tt'
- Skip_Counter: 0
- Exec_Master_Log_Pos: 107
- Relay_Log_Space: 541385
- 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 'tt'; database exists' on query. Default database: 'tt'. Query: 'create database tt'
- Replicate_Ignore_Server_Ids:
- Master_Server_Id: 12
- 1 row in set (0.00 sec)
- ERROR:
- No query specified
解决方法:找到master点的最新位置信息at 348
- [root@data-1-2 ~]# mysqlbinlog /application/mysql/data/mysql-bin.000004 >bin4.log
- [root@data-1-2 ~]# tail -10 bin4.log
- # at 267
- #170117 16:56:18 server id 1 end_log_pos 348 Query thread_id=150 exec_time=618 error_code=0
- SET TIMESTAMP=1484643378/*!*/;
- create database t99
- /*!*/;
- DELIMITER ;
- # End of log file
- ROLLBACK /* added by mysqlbinlog */;
- /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
- /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
- [root@data-1-2 ~]# mysqlbinlog /application/mysql/data/mysql-bin.000004 >bin4.log
- [root@data-1-2 ~]# tail -10 bin4.log
- # at 348
- #170117 17:43:17 server id 1 end_log_pos 429 Query thread_id=152 exec_time=3 error_code=0
- SET TIMESTAMP=1484646197/*!*/;
- create database t10
- /*!*/;
- DELIMITER ;
- # End of log file
- ROLLBACK /* added by mysqlbinlog */;
- /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
- /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
- [root@data-1-2 ~]#
slave2上执行如下,主从同步恢复正常
- mysql> change master to master_log_file='mysql-bin.000004',master_log_pos=348;
- Query OK, 0 rows affected (0.01 sec)
- mysql> start slave;
- 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: 10.0.1.82
- Master_User: rep
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000004
- Read_Master_Log_Pos: 429
- Relay_Log_File: relay-bin.000002
- Relay_Log_Pos: 334
- Relay_Master_Log_File: mysql-bin.000004
- Slave_IO_Running: Yes
- Slave_SQL_Running: Yes
- Replicate_Do_DB:
- Replicate_Ignore_DB: mysql
- 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: 429
- Relay_Log_Space: 484
- 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: 12
- 1 row in set (0.00 sec)
- ERROR:
- No query specified
- mysql>
Last_Errno: 1008
1008:数据库不存在,删除数据库失败
master-->slave1-->slave2
data-1-1上有master(端口是3306),data-1-2机器是slave1(端口3306),data-1-1上还有个slave2(端口是3307)
模拟1008错误,在slave2上把一部分库删除。由于slave1还master和slave2,这里拿slave2做实验
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "drop database d19;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "drop database d29;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "drop database dd10;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "drop database t16;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "drop database t10;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "show databases;"
- +--------------------+
- | Database |
- +--------------------+
- | information_schema |
- | mysql |
- | performance_schema |
- | t1 |
- | test |
- +--------------------+
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "show databases;"
- +--------------------+
- | Database |
- +--------------------+
- | information_schema |
- | d19 |
- | d29 |
- | dd10 |
- | mysql |
- | performance_schema |
- | t1 |
- | t10 |
- | t16 |
- | test |
- | uu |
- | zyx |
- +--------------------+
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "drop database d19;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "drop database d29;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "drop database dd10;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "drop database t16;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "drop database t10;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3306/mysql.sock -e "show databases;"
slave2出现错误1008错误
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "show slave status\G;"
- *************************** 1. row ***************************
- Slave_IO_State: Waiting for master to send event
- Master_Host: 10.0.1.82
- Master_User: rep
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000004
- Read_Master_Log_Pos: 2367
- Relay_Log_File: relay-bin.000005
- Relay_Log_Pos: 1055
- Relay_Master_Log_File: mysql-bin.000004
- Slave_IO_Running: Yes
- Slave_SQL_Running: No
- Replicate_Do_DB:
- Replicate_Ignore_DB: mysql
- Replicate_Do_Table:
- Replicate_Ignore_Table:
- Replicate_Wild_Do_Table:
- Replicate_Wild_Ignore_Table:
- Last_Errno: 1008
- Last_Error: Error 'Can't drop database 'd19'; database doesn't exist' on query. Default database: 'd19'. Query: 'drop database d19'
- Skip_Counter: 0
- Exec_Master_Log_Pos: 1970
- Relay_Log_Space: 1602
- 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: 1008
- Last_SQL_Error: Error 'Can't drop database 'd19'; database doesn't exist' on query. Default database: 'd19'. Query: 'drop database d19'
- Replicate_Ignore_Server_Ids:
- Master_Server_Id: 12
- [root@data-1-1 ~]#
解决过程:
其实也就3步:1:停止slave。 2:跳过错误。3:开启slave
stop slave
set global sql_slave_skip_counter=5
start slave
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "stop slave;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "set global sql_slave_skip_counter=5;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "start slave;"
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "show slave status\G;" | grep Last_SQL_Errno
- Last_SQL_Errno: 0
- [root@data-1-1 ~]# mysql -uroot -poldboy123 -S /data/3307/mysql.sock -e "show slave status\G;"
- *************************** 1. row ***************************
- Slave_IO_State: Waiting for master to send event
- Master_Host: 10.0.1.82
- Master_User: rep
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000004
- Read_Master_Log_Pos: 2367
- Relay_Log_File: relay-bin.000006
- Relay_Log_Pos: 253
- Relay_Master_Log_File: mysql-bin.000004
- Slave_IO_Running: Yes
- Slave_SQL_Running: Yes
- Replicate_Do_DB:
- Replicate_Ignore_DB: mysql
- 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: 2367
- Relay_Log_Space: 1748
- 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: 12
- [root@data-1-1 ~]#
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