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MySQL主从复制问题解决一例 推荐

2012-08-02 20:58 761 查看
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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