MySQL slave upgrade: Slave failed to initialize relay log info structure from the repository
MySQL slave after upgrade from 5.6.x to 5.7.x may throw the following error:
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mysql> START SLAVE;ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository |
The best solution for this error is to:
- Master server – mysqldump the database with –master-data=1 –single-transaction
- On the slave server issue command “RESET SLAVE;”
- On the slave server import the dump sql file and issue “CHANGE MASTER” command with the meta data written in the sql dump
- On the slave server issue START SLAVE to start the replication.
Here is an a real world example:
First, mysqldump in the master with
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root@master ~ # mysqldump --master-data=1 --single-transaction mydb > /root/mydb.sqlroot@master ~ # grep "CHANGE MASTER" media.sql CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.023283', MASTER_LOG_POS=537774724; |
And then copy the dump file to the slave server and import it and issue several specific slave commands:
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root@slave ~ # mysql < /root/mydb.sqlroot@slave ~ # mysqlWelcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 23Server version: 5.7.31-log Gentoo Linux mysql-5.7.31Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> reset slave;Query OK, 0 rows affected (0.01 sec)mysql> CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.023283', MASTER_LOG_POS=537774724;Query OK, 0 rows affected (0.00 sec)mysql> START SLAVE;Query OK, 0 rows affected (0.00 sec)mysql> show slave status\G;*************************** 1. row *************************** Slave_IO_State: Queueing master event to the relay log Master_Host: 10.10.10.10 Master_User: ruser Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.023283 Read_Master_Log_Pos: 641769286 Relay_Log_File: slave-relay-bin.000002 Relay_Log_Pos: 90874706 Relay_Master_Log_File: mysql-bin.023283 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: mydb.% Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 628649113 Relay_Log_Space: 103995088 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: 2395Master_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: 101 Master_UUID: cd1bcebb-cc27-11e8-90c9-801844f2c4d8 Master_Info_File: /mnt/mysql/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Reading event from the relay log 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: Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 1 row in set (0.00 sec) |
The replication is advancing. It is 2395 seconds behind the master.
