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mysql5.5提示Could not initialize master info structure

Jun 07, 2016 pm 05:52 PM
data master mysql nbsp

mysql5.5提示Could not initialize master info structure 解决办法,有需要的朋友可参考。

(一)   环境描述

操作系统:Linux x3755-31 2.6.18-308.el5

硬件配置:2*8Core CPU,6*SAS*15K*600G,RAID1+0,256G MEM


数据库版本:MySQL5.5.27-log

数据库架构:MySQL双主复制,及双主复制+外挂Slave模式(注:读写分离模式)

(二)   故障信息

a)         复制相关的my.cnf参数配置

server-id=3306

slave-skip-errors=1022,1032,1062

log_slave_updates=1

log_bin_trust_function_creators=1

auto_increment_increment=2

auto_increment_offset=1

#bind-address=10.0.2.31

#hostname=

log-bin=/data/mysqldata/binlog/mysql-bin.index

log-bin=/data/mysqldata/binlog/mysql-bin

relay-log=/data/mysqldata/relaylog/mysql-relay-bin.index

relay-log=/data/mysqldata/relaylog/mysql-relay-bin

b)         复制搭建步骤

l  复制相关参数环节有一个存储中继日志文件的目录,遗憾是过往我都是默认方式存储,现有的安装脚本未写入相关命令;

l  手工创建目录命令:mkdir -p /data/mysqldata/relaylog,未执行更改属主的命令:

chown mysql:mysql  /data/mysqldata/relaylog

l  mysql命令下输入复制搭建的命令:

CHANGE MASTER TO master_host=’10.0.2.30′,master_user=’repl’,

            master_password=’repl#3306′,master_log_pos=499,

                master_log_file=’mysql-bin.000001′;

l  执行命令之后出现的错误信息为:

ERROR 29 (HY000): File ‘/data/mysqldata/relaylog/mysql-relay-bin.index’ not found (Errcode: 13)

备注:执行shell命令工具 perror 13 会告诉你是无访问权限

l  因权限问题出错,那么就必须为中继日志文件目录变更权限信息,命令为:

chown mysql:mysql  /data/mysqldata/relaylog

l  mysql命令行下继续执行复制搭建的命令CHANGE MASTER TO …,依然报错,查阅*.err文件可以发现的信息为:

Error (Code 1201): Could not initialize master info structure; more error messages can be found in the MySQL error log


(三)   解决办法

查看*.err文件中的错误提示信息,咂看还以为是MySQL软件存在复制方面的BUG,这个时候我们主动去看下数据目录,配置的路径为:/data/mysqldata/mydata,其下已经生成了一个0KB的空文件master.info,正式因为这个文件导致mysqld提示复制无法初始化主数据库服务器的信息,直接删除0字节文件:rm  -f  /data/myqldata/mydata/master.info,再充型执行CHANAGE MASTER TO 命令,复制搭建成功,且生成了记录主数据库服务器信息的master.info文件。

(四)   总结

a)       工作中不严谨的作风是出现问题的根源;

b)       问题的发生现象可能会迷惑我们的演讲,必须学会正反方向推理和分析;

c)       掌握过硬的技术,熟悉使用的产品,是减少或解决问题的利剑

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