最近的MHA验证时,遭遇了DBD::mysql::dr::imp_data_size unexpectedly这个错误。而DBD这个包已经是安装过了的。下面是这个问题的
最近的MHA验证时,遭遇了DBD::mysql::dr::imp_data_size unexpectedly这个错误。而DBD这个包已经是安装过了的。下面是这个问题的描述和解决方案。
1、故障描述
# masterha_check_repl --conf=/etc/app1.cnf
Mon Feb 16 19:56:29 2015 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Mon Feb 16 19:56:29 2015 - [info] Reading application default configuration from /etc/app1.cnf..
Mon Feb 16 19:56:29 2015 - [info] Reading server configuration from /etc/app1.cnf..
Mon Feb 16 19:56:29 2015 - [info] MHA::MasterMonitor version 0.56.
Had to create DBD::mysql::dr::imp_data_size unexpectedly at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBI.pm line 1190.
Had to create DBD::mysql::db::imp_data_size unexpectedly at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBI.pm line 1190.
Mon Feb 16 19:56:29 2015 - [error][/usr/lib/perl5/site_perl/5.8.8/MHA/MasterMonitor.pm, ln326] Undefined subroutine &DBD::mysql::db::_login called at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBD/mysql.pm line 140.
at /usr/lib/perl5/site_perl/5.8.8/MHA/Server.pm line 166
Had to create DBD::mysql::dr::imp_data_size unexpectedly at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBI.pm line 1190.
Had to create DBD::mysql::db::imp_data_size unexpectedly at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBI.pm line 1190.
Mon Feb 16 19:56:29 2015 - [error][/usr/lib/perl5/site_perl/5.8.8/MHA/MasterMonitor.pm, ln326] Undefined subroutine &DBD::mysql::db::_login called at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBD/mysql.pm line 140.
at /usr/lib/perl5/site_perl/5.8.8/MHA/Server.pm line 166
Had to create DBD::mysql::dr::imp_data_size unexpectedly at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBI.pm line 1190.
Had to create DBD::mysql::db::imp_data_size unexpectedly at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBI.pm line 1190.
Mon Feb 16 19:56:29 2015 - [error][/usr/lib/perl5/site_perl/5.8.8/MHA/MasterMonitor.pm, ln326] Undefined subroutine &DBD::mysql::db::_login called at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/DBD/mysql.pm line 140.
at /usr/lib/perl5/site_perl/5.8.8/MHA/Server.pm line 166
Mon Feb 16 19:56:29 2015 - [error][/usr/lib/perl5/site_perl/5.8.8/MHA/MasterMonitor.pm, ln326] Got fatal error, stopping operations
Mon Feb 16 19:56:29 2015 - [error][/usr/lib/perl5/site_perl/5.8.8/MHA/MasterMonitor.pm, ln520] Error happened on checking configurations. at /usr/lib/perl5/site_perl/5.8.8/MHA/MasterMonitor.pm line 326
Mon Feb 16 19:56:29 2015 - [error][/usr/lib/perl5/site_perl/5.8.8/MHA/MasterMonitor.pm, ln691] Error happened on monitoring servers.
Mon Feb 16 19:56:29 2015 - [info] Got exit code 1 (Not master dead).
MySQL Replication Health is NOT OK!
2、故障解决
###查看当前系统的dbi与dbd包,,如下表明2个包都已安装
# rpm -qa|grep -i dbi
perl-DBI-1.52-2.el5
# rpm -qa|grep -i dbd
perl-DBD-Pg-1.49-4.el5_8
perl-DBD-MySQL-3.0007-2.el5
###我们首先卸载这2个rpm包
# rpm -e --nodeps perl-DBI-1.52-2.el5
# rpm -e --nodeps perl-DBD-MySQL-3.0007-2.el5
###下面使用yum方式分别安装这2个包
# yum install perl-DBI
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
* base: mirrors.cug.edu.cn
* epel: mirrors.ustc.edu.cn
* extras: mirrors.hust.edu.cn
* updates: mirrors.hust.edu.cn
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package perl-DBI.x86_64 0:1.52-2.el5 set to be updated
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================
Package Arch Version Repository Size
===================================================================================================
Installing:
perl-DBI x86_64 1.52-2.el5 base 600 k
Transaction Summary
===================================================================================================
Install 1 Package(s)
Upgrade 0 Package(s)
Total download size: 600 k
Is this ok [y/N]: y
Downloading Packages:
perl-DBI-1.52-2.el5.x86_64.rpm | 600 kB 00:01
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : perl-DBI 1/1

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

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To optimize MySQL slow query, slowquerylog and performance_schema need to be used: 1. Enable slowquerylog and set thresholds to record slow query; 2. Use performance_schema to analyze query execution details, find out performance bottlenecks and optimize.

MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.


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