Error Failed To Open The Relay Log Mysql
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didn't fix my problem. What I encountered was that the relay-bin from my MySQL slave server has already could not find target log during relay log initialization been ‘rotated', meaning deleted from the folder. This happens when the slave
Mysql Purge Relay Logs
has been disconnected from the master for quite a long time already and has not replicated anything. A simple
Could Not Initialize Master Info Structure
way to fix this is to flush the logs, but make sure the slave is stopped before using this command… FLUSH LOGS; Bring in a fresh copy of the database
Mysql Relay Log Vs Binlog
from the master-server and update the slave-server database. THIS IS IMPORTANT! Since if you don't update the slave database, you will not have the data from the time you were disconnected until you reset the relay logs. So UPDATE YOUR SLAVE WITH THE LATEST DATABASE FROM THE MASTER! Now when the logs are flushed,all the relay-bin logs will be deleted when the mysql show relay logs slave is started again. Usually, this fixes the problem, but when you start the slave and the failed relay log error is still there, now you have to do some more desperate measures… reset the slave. This is what I had to do to fully restore my MySQL slave server. Reseting the slaves restores all the settings to default… password, username, relay-log, port, table to replicate, etc… So better to have a copy of your settings first before actually do a slave reset. When your ready to rest the slave, do the command… RESET SLAVE; after which you should restore all your setting with a command something like… CHANGE MASTER TO MASTER_HOST=..... now start your server with… SLAVE START; check your slave server with… SHOW SLAVE STATUS\G look for … Slave_IO_Running: Yes
Slave_SQL_Running: Yes both should be YES, if not, check your syslog if there are other errors encountered. I'll leave this until here since this is what I encountered and I was able to fix it. Edit 5/14/11: There is a possible change that after executing the CHANGE MASTER c
Community Podcasts MySQL.com Downloads Documentation Section Menu: MySQL Forums :: Replication :: Failed to open the relay log on Master New Topic Advanced Search Failed to open the relay mysql disable relay log log on Master Posted by: Imran Akbar () Date: April 08, 2013 02:56PM mysql relay_log_purge Hi, After upgrading to MySQL 5.6.10 on my master and slave machines, I see this error in my my.cnf relay-log master's logs: [ERROR] Failed to open the relay log './mysqld-relay-bin.000001' (relay_log_pos 4). [ERROR] Could not find target log file mentioned in relay log info in the index file './sjvs6-cerberus-relay-bin.index' during relay http://www.slickdev.com/2008/10/20/mysql-slave-failed-to-open-the-relay-log/ log initialization. [ERROR] Failed to initialize the master info structure According to the blog post here, this happens when the hostname changes: https://blogs.oracle.com/trentlloyd/entry/watch_out_for_hostname_changes I think it's not the hostname that changed, but the settings in my.cnf, because I now have relay logs with 3 different prefixes in /usr/lib/mysql, like: mysqld-relay-bin.000001 mysql-relay-bin.000001 sjvs6-cerberus-relay-bin.000001 The weird thing is, the files in the error messages do http://forums.mysql.com/read.php?26,583429 exist, and mysql has permissions to them. Any ideas how to fix this? I don't mind resetting my slaves - I'd just like to get replication working again. the master's my.cnf is below: [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql innodb_buffer_pool_size=256M max_allowed_packet=2M slow_query_log=1 slow_query_log_file=/var/log/mysqld-slow.log default-storage-engine=InnoDB skip_secure_auth sql-mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION" # Configure and enable replication log_bin=mysql-bin server_id=36 binlog-format=mixed report-host=cerberus [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid thanks, imran Navigate:Previous Message•Next Message Options:Reply•Quote Subject Views Written By Posted Failed to open the relay log on Master 3111 Imran Akbar 04/08/2013 02:56PM Re: Failed to open the relay log on Master 1068 Rick James 04/09/2013 09:55PM Sorry, you can't reply to this topic. It has been closed. powered by phorum Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party. Contact Sales USA: +1-866-221-0634 Canada: +1-866-221-0634 Germany: +49 89 143 01280 France: +33 1 57 60 83 57 Italy: +39 02 249 59 120 UK: +44 207 553 8447 Japan: 0120-065556 China: 10800-811-0823 India: 0008001005870 More Countries» Contact Us Online» Products MySQL En
Databases, mySQL Add comments So you woke up, because your mysql http://hoschie.org/2008/02/mysql-failed-to-open-the-relay-log/ replication failed suddenly with an error like: Feb 15 07:41:06 rdb-sl http://passionatedevelopment.com/blog/2011/06/11/missing-relay-log-file-after-mysql-crash/ mysqld[18223]: 080215 7:41:06 [ERROR] Failed to open log (file './db-sl-relay-bin.000030', errno 2)
Feb 15 07:41:06 db-sl mysqld[18223]: 080215 7:41:06 [ERROR] Failed to open the relay log './db-sl-relay-bin.000030' (relay_log_pos 75527094)
Feb 15 07:41:06 db-sl mysqld[18223]: 080215 7:41:06 [ERROR] Could not open log relay log file before you consider making a mysqldump -masterdata on the master database and reimport the entire dump.. try this: -> stop mysql on the slave server -> find the directory that contains the relay logs (usually /var/lib/mysql) -> delete all relay logs called hostname-relay-bin.XXX, hostname-relay-bin.index and relay-log.info -> restart mysql Your mysql will start error failed to with fresh relay logs and is getting the missing data directly from the master server, as there will be probably still bin logs! Note: This is a kind of last resort action, no guarantees here 🙂 Leave a Reply Click here to cancel reply. You must be logged in to post a comment. Home About & Contact Useful Stuff GPG Key Free WordPress Themes Tagsapp Backup database Dovecot freebsd server imap India iOS iphone ipv6 iTunes linux Mac mediatomb mkv mySQL ping proxy PS3 squid Topics Databases (1) mySQL (1) Games (1) PS3 (1) Music (1) Operating Systems (11) FreeBSD (4) General Linux (6) Gentoo Linux (4) iOS (2) OS X (1) Ubuntu Linux (3) Traveling (11) India (11) Uncategorized (1) Meta Register Log in Entries (RSS) Comments (RSS) WordPress Tagtastic..app Backup database Dovecot freebsd server imap India iOS iphone ipv6 iTunes linux Mac mediatomb mkv mySQL ping proxy PS3 squid Links Knobelbecher Networks Holidays in Thuringia Schnitzelkuchen.de
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 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 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. 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 JavaScript to view the comments powered by Disqus.