在安装了xtrabackup后，再用下列命令登录时报下列错误

[root@localhost ~]# mysql -u root -p

mysql: relocation error: mysql: symbol strmov, version libmysqlclient_16 not defined in file libmysqlclient.so.16 with link time reference

解决方法：查看该库文件是否存在

[root@localhost ~]# find / -name libmysqlclient.so.16

/usr/lib64/libmysqlclient.so.16

查看mysql命令运行时所需要的库文件

[root@localhost ~]# ldd /usr/bin/mysql

linux-vdso.so.1 =>  (0x00007fffe3fff000)

libncursesw.so.5 => /lib64/libncursesw.so.5 (0x00007f387380c000)

libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f38735ee000)

libmysqlclient.so.16 => /usr/lib64/libmysqlclient.so.16 (0x00007f387327f000)

libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00007f3873048000)

libnsl.so.1 => /lib64/libnsl.so.1 (0x00007f3872e2e000)

libssl.so.10 => /usr/lib64/libssl.so.10 (0x00007f3872bc2000)

libcrypto.so.10 => /usr/lib64/libcrypto.so.10 (0x00007f38727df000)

libz.so.1 => /lib64/libz.so.1 (0x00007f38725c8000)

libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007f38722c2000)

libm.so.6 => /lib64/libm.so.6 (0x00007f387203e000)

libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f3871e27000)

libc.so.6 => /lib64/libc.so.6 (0x00007f3871a93000)

libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00007f3871872000)

libdl.so.2 => /lib64/libdl.so.2 (0x00007f387166d000)

/lib64/ld-linux-x86-64.so.2 (0x00007f3873a4b000)

librt.so.1 => /lib64/librt.so.1 (0x00007f3871465000)

libfreebl3.so => /lib64/libfreebl3.so (0x00007f3871262000)

libgssapi_krb5.so.2 => /lib64/libgssapi_krb5.so.2 (0x00007f387101d000)

libkrb5.so.3 => /lib64/libkrb5.so.3 (0x00007f3870d37000)

libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00007f3870b33000)

libk5crypto.so.3 => /lib64/libk5crypto.so.3 (0x00007f3870906000)

libkrb5support.so.0 => /lib64/libkrb5support.so.0 (0x00007f38706fb000)

libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00007f38704f7000)

libresolv.so.2 => /lib64/libresolv.so.2 (0x00007f38702dd000)

libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f38700be000)

从上面可以看到该文件已存在，并且已被调用

3.查看系统中是否安装了Percona软件包

[root@localhost ~]# rpm -qa | grep Percona

Percona-Server-shared-51-5.1.73-rel14.12.624.rhel6.x86_64

4.将该软件包卸载掉

[root@localhost ~]# rpm -e Percona-Server-shared-51-5.1.73 --nodeps

5.禁用percona的软件源

[root@localhost ~]# cd /etc/yum.repos.d

[root@localhost yum.repos.d]# ls

CentOS-Base.repo  CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentOS-Media.repo  CentOS-Vault.repo  epel.repo  epel-testing.repo  percona-release.repo

[root@localhost yum.repos.d]# mv percona-release.repo percona-release.repo.disable

6.安装mysql-libs软件包

[root@localhost ~]# yum -y install mysql-libs

Loaded plugins: fastestmirror, refresh-packagekit, security

Setting up Install Process

Loading mirror speeds from cached hostfile

* base: mirrors.yun-idc.com

* epel: mirrors.yun-idc.com

* extras: mirrors.yun-idc.com

* updates: mirrors.btte.net

Resolving Dependencies

--> Running transaction check

---> Package mysql-libs.x86_64 0:5.1.73-3.el6_5 will be installed

--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================

Package                                Arch                               Version                                    Repository                        Size

=============================================================================================================================================================

Installing:

mysql-libs                             x86_64                             5.1.73-3.el6_5                             base                             1.2 M

Transaction Summary

=============================================================================================================================================================

Install       1 Package(s)

Total download size: 1.2 M

Installed size: 4.0 M

Downloading Packages:

mysql-libs-5.1.73-3.el6_5.x86_64.rpm                                                                                                  | 1.2 MB     00:07

Running rpm_check_debug

Running Transaction Test

Transaction Test Succeeded

Running Transaction

Warning: RPMDB altered outside of yum.

** Found 16 pre-existing rpmdb problem(s), 'yum check' output follows:

mysql-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient.so.16()(64bit)

mysql-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient.so.16(libmysqlclient_16)(64bit)

mysql-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient_r.so.16()(64bit)

mysql-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient_r.so.16(libmysqlclient_16)(64bit)

mysql-5.1.73-3.el6_5.x86_64 has missing requires of mysql-libs = ('0', '5.1.73', '3.el6_5')

mysql-devel-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient.so.16()(64bit)

mysql-devel-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient_r.so.16()(64bit)

mysql-server-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient.so.16()(64bit)

mysql-server-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient.so.16(libmysqlclient_16)(64bit)

mysql-server-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient_r.so.16()(64bit)

mysql-server-5.1.73-3.el6_5.x86_64 has missing requires of libmysqlclient_r.so.16(libmysqlclient_16)(64bit)

perl-DBD-MySQL-4.013-3.el6.x86_64 has missing requires of libmysqlclient.so.16()(64bit)

perl-DBD-MySQL-4.013-3.el6.x86_64 has missing requires of libmysqlclient.so.16(libmysqlclient_16)(64bit)

2:postfix-2.6.6-6.el6_5.x86_64 has missing requires of libmysqlclient.so.16()(64bit)

2:postfix-2.6.6-6.el6_5.x86_64 has missing requires of libmysqlclient.so.16(libmysqlclient_16)(64bit)

2:postfix-2.6.6-6.el6_5.x86_64 has missing requires of mysql-libs

Installing : mysql-libs-5.1.73-3.el6_5.x86_64                                                                                                          1/1

Verifying  : mysql-libs-5.1.73-3.el6_5.x86_64                                                                                                          1/1

Installed:

mysql-libs.x86_64 0:5.1.73-3.el6_5

Complete!

7.重新登录进行测试

[root@localhost ~]# mysql -u root -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 3

Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> exit

问题解决！