MySQL 主从报错“Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file n”
1、背景
一主一从报错，测试环境
从库执行show slave status\G
mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Master_Host: 10.0.0.51 Master_User: repl Master_Port: 3306 Connect_Retry: 10 Master_Log_File: mysql-bin.000027 Read_Master_Log_Pos: 197 Relay_Log_File: db02-relay-bin.000059 Relay_Log_Pos: 366 Relay_Master_Log_File: mysql-bin.000027 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: 197 Relay_Log_Space: 980 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: 13114 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in binary log index file' Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 53 Master_UUID: c261769d-e2ac-11ed-93ef-000c29ee4d81 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: 240707 09:44:35 Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: c261769d-e2ac-11ed-93ef-000c29ee4d81:18-23 Executed_Gtid_Set: 13d3c89a-e2ad-11ed-8b66-000c29ea33e0:1-156, c261769d-e2ac-11ed-93ef-000c29ee4d81:18-23 Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: Master_public_key_path: Get_master_public_key: 0 Network_Namespace: 1 row in set, 1 warning (0.00 sec)
2、从报错信息可以看出是从库没有找到第一个log，可能是主库清理过Log导致。
解决方法：
方法一：直接推掉从库从重新搭建一个从库
方法二：跳过
3、介绍方法二
先停止主从复制关系(从库执行)
stop slave;
主库执行
mysql> SHOW MASTER STATUS\g +------------------+----------+--------------+------------------+-------------------------------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------------------------------+ | mysql-bin.000036 | 197 | | | c261769d-e2ac-11ed-93ef-000c29ee4d81:1-34 | +------------------+----------+--------------+------------------+-------------------------------------------+ 1 row in set (0.00 sec) mysql> flush logs; Query OK, 0 rows affected (0.03 sec) mysql> SHOW MASTER STATUS\g +------------------+----------+--------------+------------------+-------------------------------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------------------------------+ | mysql-bin.000037 | 197 | | | c261769d-e2ac-11ed-93ef-000c29ee4d81:1-34 | +------------------+----------+--------------+------------------+-------------------------------------------+ 1 row in set (0.00 sec)
从库执行
mysql> change master to master_log_file='mysql-bin.000037',master_log_pos=197; Query OK, 0 rows affected, 3 warnings (0.02 sec) mysql> mysql> mysql> start slave; Query OK, 0 rows affected, 1 warning (0.01 sec) mysql> mysql> mysql> mysql> mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for source to send event Master_Host: 10.0.0.51 Master_User: repl Master_Port: 3306 Connect_Retry: 10 Master_Log_File: mysql-bin.000037 Read_Master_Log_Pos: 197 Relay_Log_File: db02-relay-bin.000002 Relay_Log_Pos: 326 Relay_Master_Log_File: mysql-bin.000037 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: 197 Relay_Log_Space: 535 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: 53 Master_UUID: c261769d-e2ac-11ed-93ef-000c29ee4d81 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: 13d3c89a-e2ad-11ed-8b66-000c29ea33e0:1-156, c261769d-e2ac-11ed-93ef-000c29ee4d81:18-23 Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: Master_public_key_path: Get_master_public_key: 0 Network_Namespace: 1 row in set, 1 warning (0.01 sec)
主库再次查看主从复制
mysql> show master status\G *************************** 1. row *************************** File: mysql-bin.000037 Position: 483 Binlog_Do_DB: Binlog_Ignore_DB: Executed_Gtid_Set: c261769d-e2ac-11ed-93ef-000c29ee4d81:1-35 1 row in set (0.00 sec)
Do everything well
