年后回来查看mysql运行状况与备份情况，登录mysql从库查看主从同步状态
mysql> show slave status\G;
*************************** . row ***************************
Slave_IO_State:
Master_Host: 101.200.*.*
Master_User: backup
Master_Port:
Connect_Retry:
Master_Log_File: master-bin.
Read_Master_Log_Pos:
Relay_Log_File: mysql-relay.
Relay_Log_Pos:
Relay_Master_Log_File: master-bin.
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:
Last_Error:
Skip_Counter:
Exec_Master_Log_Pos:
Relay_Log_Space:
Until_Condition: None
Until_Log_File:
Until_Log_Pos:
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:
Last_IO_Error: Got fatal error from master when reading data from binary log: 'Could not find first log file name in binary log index file'
Last_SQL_Errno:
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id:
Master_UUID: e4a43da7-5b58-11e5-a12f-00163e003632
Master_Info_File: /home/data/mysql/master.info
SQL_Delay:
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:
Master_Bind:
Last_IO_Error_Timestamp: ::
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position:
row in set (0.00 sec) ERROR:
No query specified
突然之间Slave_IO_Running: 状态变成NO了
解决方法。
首先在从库上执行
stop slave;
查看主库master状态
mysql> show master status\G;
*************************** . row ***************************
File: mysql-bin.
Position:
Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set:
row in set (0.00 sec) ERROR:
No query specified mysql> flush logs;
Query OK, rows affected (0.11 sec)
刷新binlog日志
flush logs;
刷新后的日志会+1
例如上面的 File: mysql-bin.000113 会变成 File: mysql-bin.000114
再次查看master状态
mysql> show master status\G;
*************************** . row ***************************
File: mysql-bin.
Position:
Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set:
row in set (0.00 sec) ERROR:
No query specified
然后就不需要在操作master，切换到从库
输入CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000114',MASTER_LOG_POS=120;
执行start slave;
查看从库状态
mysql> show slave status\G;
*************************** . row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 101.200.*.*
Master_User: backup
Master_Port:
Connect_Retry:
Master_Log_File: mysql-bin.
Read_Master_Log_Pos:
Relay_Log_File: mysql-relay.
Relay_Log_Pos:
Relay_Master_Log_File: mysql-bin.
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:
Last_Error:
Skip_Counter:
Exec_Master_Log_Pos:
Relay_Log_Space:
Until_Condition: None
Until_Log_File:
Until_Log_Pos:
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master:
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno:
Last_IO_Error:
Last_SQL_Errno:
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id:
Master_UUID: e4a43da7-5b58-11e5-a12f-00163e003632
Master_Info_File: /home/data/mysql/master.info
SQL_Delay:
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:
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position:
row in set (0.00 sec) ERROR:
No query specified