MySQL主从复制遇到错误的处理办法

MySQL在主从复制的时候经常遇到错误而导致Slave复制中断，这个时候就需要人工干涉，来跳过这个错误，才能使Slave端的复制，得以继续进行；

跳过错误的方法：

MariaDB [(none)]> STOP SLAVE;
MariaDB [(none)]> SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE 'SQL_SLAVE_SKIP_COUNTER';

+------------------------+-------+
| Variable_name          | Value |
+------------------------+-------+
| sql_slave_skip_counter | 1     |
+------------------------+-------+

MariaDB [(none)]> START SLAVE;

例如：
Slave错误发生时的状态:

MariaDB [(none)]> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
           Slave_IO_State: Waiting for master to send event
              Master_Host: 192.168.180.100
              Master_User: repluser
              Master_Port: 3306
            Connect_Retry: 60
          Master_Log_File: mysql-bin.000004
      Read_Master_Log_Pos: 658
           Relay_Log_File: relay-bin.000002
            Relay_Log_Pos: 601
    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: 1008
               Last_Error: Error 'Can't drop database 'test'; database doesn't exist' on query. Default database: 'test'. Query: 'drop database test'
             Skip_Counter: 0
      Exec_Master_Log_Pos: 313
          Relay_Log_Space: 4079
          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 'test'; database doesn't exist' on query. Default database: 'test'. Query: 'drop database test'
  Replicate_Ignore_Server_Ids: 
         Master_Server_Id: 1
           Master_SSL_Crl: 
       Master_SSL_Crlpath: 
               Using_Gtid: No
              Gtid_IO_Pos: 
  Replicate_Do_Domain_Ids: 
  Replicate_Ignore_Domain_Ids: 
            Parallel_Mode: conservative
            

使用上面的方法使MySQL的Slave端复制恢复正常：

MariaDB [(none)]> STOP SLAVE;
MariaDB [(none)]> SET GLOBAL  SQL_SLAVE_SKIP_COUNTER=1;
MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE 'SQL_SLAVE_SKIP_COUNTER';
+------------------------+-------+
| Variable_name          | Value |
+------------------------+-------+
| sql_slave_skip_counter | 1     |
+------------------------+-------+
MariaDB [(none)]> START SLAVE;
MariaDB [(none)]> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
           Slave_IO_State: Waiting for master to send event
              Master_Host: 192.168.180.100
              Master_User: repluser
              Master_Port: 3306
            Connect_Retry: 60
          Master_Log_File: mysql-bin.000004
      Read_Master_Log_Pos: 658
           Relay_Log_File: relay-bin.000006
            Relay_Log_Pos: 537
    Relay_Master_Log_File: mysql-bin.000004
         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: 658
          Relay_Log_Space: 1526
          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
           Master_SSL_Crl: 
       Master_SSL_Crlpath: 
               Using_Gtid: No
              Gtid_IO_Pos: 
  Replicate_Do_Domain_Ids: 
  Replicate_Ignore_Domain_Ids: 
            Parallel_Mode: conservative
            

到此，MySQL的主从复制恢复正常。。。大功告成