MySQL主从复制问题解决一例

这是mysql关于主从复制的主库的配置相关内容：

server-id       = 1  

log-bin=/mysql_log/binlog/bin-log  

slave-skip-errors=1062,1205  

max_binlog_size = 500M  

binlog_cache_size = 128K  

relay-log =/mysql_log/relaylog/relaylog  

log-slave-updates 

之前搭建的MySQL主从复制出现问题，不能正常同步，查看日志，发下有以下错误：

120726 13:20:36 Could not use /mysql_log/relaylog/relaylog for logging (error 2). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it.  

120726 13:20:36 Failed in open_log() called from init_relay_log_info()  

120726 13:20:36 Failed to initialize the master info structure  

120726 13:20:36 Could not use /mysql_log/binlog/bin-log for logging (error 2). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it.  

120801 17:53:00 Failed to open the relay log '/mysql_log/relaylog/relaylog.036' (relay_log_pos 4)  

120801 17:53:00 Could not find target log during relay log initialization  

120801 17:53:00 Failed to initialize the master info structure  

1、关闭mysql 

[root@111_ddb ~]# mysqladmin -p shutdown  

Enter password:  

[root@111_ddb data]# tail -f /home/mysql/data/111_ddb.err  

120801 17:56:57 /usr/local/mysql/libexec/mysqld: Normal shutdown  

120801 17:56:58  InnoDB: Starting shutdown...  

120801 17:57:30  InnoDB: Shutdown completed  

120801 17:57:30 /usr/local/mysql/libexec/mysqld: Shutdown Complete  

120801 17:57:30  mysqld ended  

2、删除主库上关于binlog日志的记录文件，msater.info 和 relay-log.info

[root@111_ddb ~]# cd /home/mysql/data/  

[root@111_ddb data]# ls  

111_ddb.err  111_ddb-slow.log  ddb                     ibdata1      ib_logfile1  master.info  mysql_dd        slow.log  test  

111_ddb.pid  adb               ib_arch_log_0000000000  ib_logfile0  ib_logfile2  mysql        relay-log.info  tdb  

[root@111_ddb data]# ls *info  

master.info  relay-log.info  

[root@111_ddb data]# ls  

111_ddb.err  111_ddb-slow.log  ddb                     ibdata1      ib_logfile1  master.info  mysql_dd        slow.log  test  

111_ddb.pid  adb               ib_arch_log_0000000000  ib_logfile0  ib_logfile2  mysql        relay-log.info  tdb  

[root@111_ddb data]# rm -f master.info relay-log.info   

[root@111_ddb data]# cd /mysql_log/binlog/  

[root@111_ddb binlog]# ls  

bin-log.001  bin-log.index 

[root@111_ddb binlog]# rm -f *  

[root@111_ddb binlog]# cd ../relaylog/  

[root@111_ddb relaylog]# ls  

relaylog.001  relaylog.index 

[root@111_ddb relaylog]# rm -f *  

[root@111_ddb relaylog]# cd ../binlog/ 

3、开启mysql

[root@111_ddb ~]# /usr/local/mysql/bin/mysqld_safe --defaults-file=/usr/local/mysql/etc/innodb.cnf --datadir=/home/mysql/data --user=mysql &  

[root@111_ddb data]# tail -f /home/mysql/data/111_ddb.err  

120801 17:58:21  mysqld started  

120801 17:58:23  InnoDB: Started  

/usr/local/mysql/libexec/mysqld: ready for connections.  

Version: '4.0.26-log'  socket: '/tmp/mysql.sock'  port: 3306  Source distribution  

[root@111_ddb binlog]# ll  

total 13080  

-rw-rw---- 1 mysql mysql 13365795 Aug  1 17:59 bin-log.001  

-rw-rw---- 1 mysql mysql       30 Aug  1 17:58 bin-log.index  

[root@111_ddb binlog]# ll  

total 13828  

-rw-rw---- 1 mysql mysql 14132046 Aug  1 17:59 bin-log.001  

-rw-rw---- 1 mysql mysql       30 Aug  1 17:58 bin-log.index  

[root@111_ddb binlog]# ll  

total 15020  

-rw-rw---- 1 mysql mysql 15355877 Aug  1 17:59 bin-log.001  

-rw-rw---- 1 mysql mysql       30 Aug  1 17:58 bin-log.index 

通过日志和查看binlog文件，说明主库的配置恢复正常

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MySQL主从复制