Error: Package: mysql-community-client-5.7.17-1.el7.i686 (mysql57-community)Requires: libstdc++.so.6

[root@hadoop001 mysql]# yum install mysql-community-server
Loaded plugins: fastestmirror, refresh-packagekit, security
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: ap.stykers.moe
 * epel: mirrors.yun-idc.com
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
http://dev.centos.org/centos/6/upg/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'dev.centos.org'"
Trying other mirror.
Resolving Dependencies
--> Running transaction check
---> Package mysql-community-server.i686 0:5.7.17-1.el7 will be installed
--> Processing Dependency: mysql-community-common(x86-32) = 5.7.17-1.el7 for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: mysql-community-client(x86-32) >= 5.7.9 for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: systemd for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: systemd for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: libstdc++.so.6(GLIBCXX_3.4.15) for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: libc.so.6(GLIBC_2.17) for package: mysql-community-server-5.7.17-1.el7.i686
--> Running transaction check
---> Package mysql-community-client.i686 0:5.7.17-1.el7 will be installed
--> Processing Dependency: mysql-community-libs(x86-32) >= 5.7.9 for package: mysql-community-client-5.7.17-1.el7.i686
--> Processing Dependency: libstdc++.so.6(GLIBCXX_3.4.15) for package: mysql-community-client-5.7.17-1.el7.i686
---> Package mysql-community-common.i686 0:5.7.17-1.el7 will be installed
---> Package mysql-community-server.i686 0:5.7.17-1.el7 will be installed
--> Processing Dependency: systemd for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: systemd for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: libstdc++.so.6(GLIBCXX_3.4.15) for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: libc.so.6(GLIBC_2.17) for package: mysql-community-server-5.7.17-1.el7.i686
--> Running transaction check
---> Package mysql-community-client.i686 0:5.7.17-1.el7 will be installed
--> Processing Dependency: libstdc++.so.6(GLIBCXX_3.4.15) for package: mysql-community-client-5.7.17-1.el7.i686
---> Package mysql-community-libs.i686 0:5.7.17-1.el7 will be obsoleting
---> Package mysql-community-server.i686 0:5.7.17-1.el7 will be installed
--> Processing Dependency: systemd for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: systemd for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: libstdc++.so.6(GLIBCXX_3.4.15) for package: mysql-community-server-5.7.17-1.el7.i686
--> Processing Dependency: libc.so.6(GLIBC_2.17) for package: mysql-community-server-5.7.17-1.el7.i686
---> Package mysql-libs.i686 0:5.1.73-8.el6_8 will be obsoleted
--> Processing Dependency: libmysqlclient.so.16 for package: 2:postfix-2.6.6-6.el6_7.1.i686
--> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16) for package: 2:postfix-2.6.6-6.el6_7.1.i686
--> Finished Dependency Resolution
Error: Package: mysql-community-client-5.7.17-1.el7.i686 (mysql57-community)
           Requires: libstdc++.so.6(GLIBCXX_3.4.15)
Error: Package: 2:postfix-2.6.6-6.el6_7.1.i686 (@base)
           Requires: libmysqlclient.so.16
           Removing: mysql-libs-5.1.73-8.el6_8.i686 (@updates)
               libmysqlclient.so.16
           Obsoleted By: mysql-community-libs-5.7.17-1.el7.i686 (mysql57-community)
               Not found
Error: Package: mysql-community-server-5.7.17-1.el7.i686 (mysql57-community)
           Requires: systemd
Error: Package: mysql-community-server-5.7.17-1.el7.i686 (mysql57-community)
           Requires: libstdc++.so.6(GLIBCXX_3.4.15)
Error: Package: mysql-community-server-5.7.17-1.el7.i686 (mysql57-community)
           Requires: libc.so.6(GLIBC_2.17)
 You could try using --skip-broken to work around the problem
** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
gnome-user-share-2.28.2-3.el6.i686 has missing requires of httpd >= ('0', '2.2.0', None)