Error Failed To Open The Relay Log Relay Log_pos
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Could Not Initialize Master Info Structure
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My.cnf Relay-log
Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top moving a mysql slave to a new host : Failed to open the relay https://dev.mysql.com/doc/refman/5.7/en/slave-logs-relaylog.html log up vote 1 down vote favorite I have a master-master setup which I want to move to a new pair of servers (from linux to opensolaris). linux boxes names are shard1-1 and shard1-2, and osol boxes names are shard1-1-osol and shard1-2-osol. this is what I did: 1. took down mysql server on both linux boxes, copied the data to the osol boxes. 2. edited master.info on each of the osol boxes, changed master from shard1-1 to shard1-1-osol http://serverfault.com/questions/61471/moving-a-mysql-slave-to-a-new-host-failed-to-open-the-relay-log and vice versa on both machines. when I started mysql on the first osol machine, I see this in the error log: looks like mysql does not like the host name change, and it's bitching about it. the mysqld-relay-bin.000707 file exists in the datadir, so it's not clear what mysql is whining about. 090902 2:26:03 InnoDB: Started; log sequence number 246 3528553673 090902 2:26:03 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=shard1-1-osol-relay-bin' to avoid this problem. 090902 2:26:03 [ERROR] Failed to open the relay log './mysqld-relay-bin.000707' (relay_log_pos 19653396) 090902 2:26:03 [ERROR] Could not find target log during relay log initialization 090902 2:26:03 [ERROR] Failed to initialize the master info structure mysql replication share|improve this question asked Sep 2 '09 at 9:59 Omry 5501616 add a comment| 4 Answers 4 active oldest votes up vote 2 down vote accepted The server can't find the relay logs because they are named based in part upon the host name. You are going to have ALL KINDS of problems trying to bring the slave up using that technique. I suggest reinitializing the slave from the new master. Just drop all the databases on the slave, take a dump from the master using mysqldump, import it onto the slave and then use CHANGE MASTER TO in ord
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a simple PK update SQL takes 500+ seconds inOracle → How-to fix Mysql slave after relay logcorrupted October 17, 2013 10 Comments We run into issues like "Relay log read failure: Could not parse relay log event entry" many times on Mysql slave node. Most of time in our cases, it's due to Linux host crashed unexpectedly. The detail error is like this: mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: alexzeng.wordpress.com Master_User: mysql_rep Master_Port: 3306 Connect_Retry: 60 Master_Log_File: LBMS-bin.000012 Read_Master_Log_Pos: 239005305 Relay_Log_File: LBMS-relay-bin.000004 Relay_Log_Pos: 221245258 Relay_Master_Log_File: LBMS-bin.000012 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: 1594 Last_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's relay log is corrupted (you can check this by running 'mysqlbinlog' on the relay log), a network problem, or a bug in the master's or slave's MySQL code. If you want to check the master's binary log or slave's relay log, you will be able to know their names by issuing 'SHOW SLAVE STATUS' on this slave. Skip_Counter: 0 Exec_Master_Log_Pos: 221245113 Relay_Log_Space: 239007065 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: 1594 Last_SQL_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's bina