设置主从复制时发生报错Could not find first log file name in binary log index file‘；解决方案

如图所示，slave_io_runnind:no,slave_sql_running:yes

此时，主从配置错误，我们可以查看Last_IO_Error:来查看报错信息

 此时，我们需要停止从服务器的主从服务，

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

到master机器登陆mysql：

记录master的bin的位置，例如：

mysql> show master status;

 必要时使用flush log;进行刷新

然后。我们到从服务器进行修改

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> change master to master_log_file='service-bin.000004',master_log_pos=157;
Query OK, 0 rows affected, 3 warnings (0.01 sec)mysql> change master to master_host='master1',master_user='rep',master_password='Wyxbuke00.',master_log_file='service-bin.000004';
Query OK, 0 rows affected, 8 warnings (0.02 sec)mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> show slave status\G;
*************************** 1. row ***************************Slave_IO_State: Waiting for source to send eventMaster_Host: master1Master_User: repMaster_Port: 3306Connect_Retry: 60Master_Log_File: service-bin.000004Read_Master_Log_Pos: 157Relay_Log_File: server-relay-bin.000002Relay_Log_Pos: 328Relay_Master_Log_File: service-bin.000004Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0Last_Error: Skip_Counter: 0Exec_Master_Log_Pos: 157Relay_Log_Space: 539Until_Condition: NoneUntil_Log_File: Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1Master_UUID: d5ddcb15-d063-11ee-a4cc-000c2904e4beMaster_Info_File: mysql.slave_master_infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Replica has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: Master_public_key_path: Get_master_public_key: 0Network_Namespace: 
1 row in set, 1 warning (0.00 sec)
问题解决！