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replication on slave (version 5.1.61) 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\G on stopped slave server: Slave_IO_State: Waiting for master to send event Master_Host: 10.1.79.48 Master_User: replica

Error: Error In Log_event::read_log_event(): 'event Too Small', Data_len: 0, Event_type: 0

Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.002046 Read_Master_Log_Pos: 639600842 Relay_Log_File: triton-relay-bin.001957 Relay_Log_Pos: 243 Relay_Master_Log_File: mysql-bin.002045 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: pretinac_radio,web Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: web.logging_www,web.logging_raspored,web.web_korisnik 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 mysql relay log read failure 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: 103641119 Relay_Log_Space: 983411603 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: [the same error description as in Last_Error] To fix the error, current binlog files on slave should be discarded and set new position. Before setting new binlog position it's important to remember Relay_Master_Log_File and Exec_Master_Log_Pos values: Relay_Master_Log_File: mysql-bin.002045 Exec_Master_Log_Pos: 103641119 OK, with this values, new binlog position can be set: # stop slave mysql> stop slave; # make slave forget its replication position in the master's binary log mysql> reset slave; # change slave to start reading from stopped position mysql> change master to master_log_file='mysql-bin.002045', master_log_pos=103641119; # start slave mysql> start slave; Just to note that

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Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the http://www.redips.net/mysql/replication-slave-relay-log-corrupted/ community. Join them; it only takes a minute: 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 MySQL relay log corrupted, how do I fix it? Tried but failed up vote 4 down vote favorite 4 A MySQL v5.1.61 relay got corrupted when the machine http://dba.stackexchange.com/questions/53893/mysql-relay-log-corrupted-how-do-i-fix-it-tried-but-failed suddenly shut down. I tried to fix it but it didn't work. — How do I fix it? Did I do something wrong? As far as I've read, corrupted MySQL relay logs are easily fixed: change master to master_log_file='', master_log_pos=; where Relay_Master_Log_File and Exec_Master_Log_Pos are listed by: mysql> show slave status; However when I did change master status ..., I got a primary key violation error. How is that possible? Is the above procedure no correct, or is e.g. some +1 missing? (For now I've simply re-imported a --master-data mysqldump from the master to the slave, and this solved the problem. However, in the future, doing that might not be appropriate.) Here follows details about my particular problem: mysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: the-master-host Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000021 Read_Master_Log_Pos: 33639968 Relay_Log_File: mysql-relay-bin.000271 Relay_Log_Pos: 2031587 Relay_Master_Log_File: mysql-bin.000020 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: the_database 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: t

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 https://alexzeng.wordpress.com/2013/10/17/how-to-fix-mysql-slave-after-relay-log-corrupted/ 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: http://juraj.blahunka.eu/2014/05/18/recover-from-gtid-replication-relay-log-error/ 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: relay log 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 error 1594 mysql 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 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. Replicate_Ignore_Server_Ids: Master_Server_Id: 1 1 row in set (0.00 sec) In this case, we can check if the bin log at master node is still available. Relay_Master_Log_File: LBMS-bin.000012 ... Exec_Master_Log_Pos: 221245113 If it's still available at master node, we can reset slave to that point, and let

in our production system. Replication on MySQL Slave failed. It was not caused by a bug, but by an unexpected Slave server restart of the whole machine. After checking SHOW SLAVE STATUS\G we got scared, that Master's binlog is also corrupt, which happened not so long ago - MySQL Bug #7022. Fortunately, Master's binlog was intact, so we moved back to Slave, to solve the problem (removed MySQL noise for brevity): mysql> SHOW SLAVE STATUS\G *************************** 1. row *************************** ... Slave_IO_Running: Yes Slave_SQL_Running: No ... 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 ... Executed_Gtid_Set: 3aabcfda-591d-11e3-81f1-0050569a4585:1-14351185 Auto_Position: 1 1 row in set (0.00 sec) You can see from the output, that we are using GTID replication, which is available since MySQL 5.6. Transactions 1-14351185 were executed successfully, but the 14351186 got corrupt. We tried to skip it by committing an empty GTID transaction, but that did not help. What to do next? At this point I wanted to start crying, because multiple sites and tutorials suggest to perform a clean mysqldump of Master, which will be copied to Slave. That is "the correct" way of solving replication problems. However, shutting down a site, just to perform a ~700GB database dump is not fun at all. MySQL 5.6 replication variables Browsing through the net reveals a small number of pages, which mention this secret GTID_PURGED variable. http://www.mysqlperformanceblog.com/2013/02/08/how-to-createrestore-a-slave-using-gtid-replication-in-mysql-5-6/ http://dev.mysql.com/doc/refman/5.6/en/replication-options-gtids.html I didn't comprehend the meaning of this variable at first (straight from dev.mysql.com): The set of all transactions that

 

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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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