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error initializing relay log position

Reporter: Matthew Montgomery Email Updates: Status: Duplicate Impact on me: None Category:MySQL Server: failed to open the relay log Replication Severity:S3 (Non-critical) Version:mysql-5.1.48 OS:Linux Assigned to: Luis Soares Triage: Triaged: could not find target log during relay log initialization D3 (Medium) View Add Comment Files Developer Edit Submission View Progress Log Contributions [21 Jul

Could Not Initialize Master Info Structure

2010 21:50] Matthew Montgomery Description: CHANGE MASTER TO is not accepting relative path for relay_log_file without ./ prefixed onto log file name. Setting relay_log=`host`-relay-bin does not

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have an impact. Setting relay_log=/full/path/to/`host`-relay-bin At a minimum this is a documentation bug since http://dev.mysql.com/doc/refman/5.1/en/change-master-to.html never mentions the "./relay-log-bin.000001" notation. This behavior is mentioned also in Bug #42879 which received a fix pushed in 5.1.33 but is still "Verified" How to repeat: mysql> slave stop; Query OK, 0 rows affected (0.00 could not find target log file mentioned in relay log info in the index file sec) mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Master_Host: 192.168.23.22 Master_User: repl Master_Port: 3370 Connect_Retry: 60 Master_Log_File: silo-bin.000001 Read_Master_Log_Pos: 107 Relay_Log_File: silo-relay-bin.000002 Relay_Log_Pos: 4 Relay_Master_Log_File: silo-bin.000001 Slave_IO_Running: No Slave_SQL_Running: No [...] mysql> change master to relay_log_file='silo-relay-bin.000003', relay_log_pos=0; ERROR 1380 (HY000): Failed initializing relay log position: Could not find target log during relay log initialization mysql> \! ls -l data/silo-relay-bin.000003 -rw-rw---- 1 matt matt 106 2010-07-21 16:16 data/silo-relay-bin.000003 mysql> show variables like 'relay%'; +-----------------------+----------------+ | Variable_name | Value | +-----------------------+----------------+ | relay_log | | | relay_log_index | | | relay_log_info_file | relay-log.info | | relay_log_purge | OFF | | relay_log_space_limit | 0 | +-----------------------+----------------+ 5 rows in set (0.00 sec) mysql> show variables like 'datadir'; +---------------+---------------------------------------+ | Variable_name | Value | +---------------+---------------------------------------+ | datadir | /home/matt/mysql/sandbox/5.1.48/data/ | +---------------+---------------------------------------+ 1 row in set (0.00 sec) mysql> show variables like 'basedir'; +---------------+-----------------------------+ | Variable_name | Value | +---------------+-----------------------------+ | basedir | /data/mysql/sandbox/5.1.48/ | +---------------+------------------------

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Mysql Relay Log Read Failure

Legal Notices General Information Installing and Upgrading MySQL Tutorial MySQL mysql reset relay log Programs MySQL Server Administration Security Backup and Recovery Optimization Language Structure Globalization Data Types mysql relay log vs binlog Functions and Operators SQL Statement Syntax The InnoDB Storage Engine Alternative Storage Engines High Availability and Scalability Replication Replication Configuration How to Set https://bugs.mysql.com/bug.php?id=55460 Up Replication Setting the Replication Master Configuration Setting the Replication Slave Configuration Creating a User for Replication Obtaining the Replication Master Binary Log Coordinates Creating a Data Snapshot Using mysqldump Creating a Data Snapshot Using Raw Data Files Setting Up Replication with New Master and Slaves Setting Up https://dev.mysql.com/doc/refman/5.6/en/slave-logs-relaylog.html Replication with Existing Data Introducing Additional Slaves to an Existing Replication Environment Setting the Master Configuration on the Slave Replication Formats Advantages and Disadvantages of Statement-Based and Row-Based Replication Usage of Row-Based Logging and Replication Determination of Safe and Unsafe Statements in Binary Logging Replication with Global Transaction Identifiers GTID Concepts Setting Up Replication Using GTIDs Using GTIDs for Failover and Scaleout Restrictions on Replication with GTIDs Replication and Binary Logging Options and Variables Replication and Binary Logging Option and Variable Reference Replication Master Options and Variables Replication Slave Options and Variables Binary Log Options and Variables Global Transaction ID Options and Variables Common Replication Administration Tasks Checking Replication Status Pausing Replication on the Slave Replication Implementation Replication Implementation Details Replication Relay and Status Logs The Slave Relay Log Slave Status Logs How Servers Evaluate Replication Filtering Rules Evaluation of

After everything is back to operational - I noticed that the replication has stopped in this slave. I tried to restart the replication but it was unsuccessful. I then checked the MySQL log and http://passionatedevelopment.com/blog/2011/06/11/missing-relay-log-file-after-mysql-crash/ found the following: [bash] 110606 17:01:30 [ERROR] Failed to open the relay log './forbes-relay-bin.785212' (relay_log_pos 14931) 110606 17:01:30 [ERROR] Could not find target log during relay log initialization 110606 17:01:30 [ERROR] Failed to initialize the master info structure [/bash] And so MySQL is complaining that it can’t find the relay log file and sure enough I had a look into the directory, I couldn’t find it. So what to do? I Googled around relay log for some magic solutions - this link came up on top. The proposed solution was to: CHANGE MASTER TO the positon _on the master_ where the slave was, the slave will get the transactions from the master binary logs again and you will lose nothing. Requires that the master still has those binary logs. However this is not the problem, it is not that the slave doesn’t know the master bin log position. could not find My guess is the relay log is now outdated and needs to be regenerated. So what we really need to do is to tell the slave to regenerate its relay log files. Here are the steps to do it: On the crashed slave - record the last Master bin log file and position before the crash The slave should not be running - if it is - issue STOP SLAVE And then issue RESET SLAVE command Go to the MySQL directory - ensure that relay logs, master info and relay-log.info are deleted - they should be deleted when you run RESET SLAVE. Note: When I did this the first time - MySQL didn't delete the relay logs - running RESET SLAVE the second time fixed it Now issue CHANGE_MASTER log position to the position that you have recorded on step 1 above Issue START SLAVE Now the replication should start again - you will notice that the relay log files are re-numbered from the beginning ie: suffix 00001. Posted by Felix Tjandrawibawa Jun 11th, 2011 general Related Posts Linux Server Security Essentials 25 Jun 2016 AWS Summit Sydney 2016 30 Apr 2016 Automated Grails Deployment to AWS (or when a manual upload of a 82 MB WAR is not going to fly) 05 Apr 2016 Comments Please enable JavaS

 

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error mysql p replication on slave version has stopped Slave IO Running was marked as Yes but Slave SQL Running as No Simple stop start slave didn't help so further problem analysis was relay log write failure could not queue event from master needed It seemed that current slave's relay log was corrupted because testing log event entry exceeded max allowed packet with mysqlbinlog has printed out an error Therefore the solution was to discard current relay binlogs and to relay master log file point slave to the last master binlog position Here is complete output from show slave status

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error counting relay log space mysql p Community Podcasts MySQL com Downloads Documentation Section Menu MySQL Forums Replication Replication logs cleanup New Topic Advanced Search Replication logs could not find target log during relay log initialization cleanup Posted by Rupesh Date October PM The Failed To Open The Relay Log latest binary log no on my slave server mysql a was db -relay-bin to free up space could not initialize master info structure I deleted old logs from to But now when I try to start slave I get the following msg mysql start slave ERROR HY Could Not Find

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error failed to initialize the master info structure p by Harjit Lakhan on Thu Nov UTC ERROR ERROR Failed to open error reading master configuration the relay log ' var run mysqld mysqld-relay-bin ' relay log pos ERROR Could not error counting relay log space find target log during relay log initialization ERROR Failed to initialize the master failed to open the relay log info structure Due to the way in which the master and slaves where stoppedthe relay logs got out of sync hence replication would could not find target log during relay log initialization not restart Found the

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