安装完成后，我无法启动mariadb.service

Question

I have installed mariadb in my CentOS7, "systemctl start mariadb" command does not work. Console out is this --> " Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details. "

[root@centos ~]# journalctl -xe
 1월 21 00:31:34 centos systemd[1]: mariadb.service failed.
 1월 21 00:31:34 centos polkitd[828]: Unregistered Authentication Agent for unix-process:3046:129841 (system bus name :1
 1월 21 00:31:53 centos fprintd[3001]: No devices in use, exit
 1월 21 00:32:07 centos polkitd[828]: Registered Authentication Agent for unix-process:3087:133140 (system bus name :1.1
 1월 21 00:32:07 centos systemd[1]: Starting MariaDB 10.1.30 database server...
-- Subject: Unit mariadb.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mariadb.service has begun starting up.
 1월 21 00:32:07 centos mysqld[3110]: /usr/sbin/mysqld: error while loading shared libraries: libjemalloc.so.1: cannot o
 1월 21 00:32:07 centos systemd[1]: mariadb.service: main process exited, code=exited, status=127/n/a
 1월 21 00:32:07 centos systemd[1]: Failed to start MariaDB 10.1.30 database server.
-- Subject: Unit mariadb.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mariadb.service has failed.
-- 
-- The result is failed.
 1월 21 00:32:07 centos systemd[1]: Unit mariadb.service entered failed state.
 1월 21 00:32:07 centos systemd[1]: mariadb.service failed.
 1월 21 00:32:07 centos polkitd[828]: Unregistered Authentication Agent for unix-process:3087:133140 (system bus name :1
lines 3201-3223/3223 (END)

I search long time to solve this problem, i can't find proper solution. And /var/log/mariadb directory does not exist.

How can i fix this issue? please help me!

(Update)

[root@kyun2centos ~]# journalctl -xe|grep 'error'
 1월 23 16:47:12 kyun2centos gnome-settings-[2077]: g_task_return_error: assertion 'error != NULL' failed
 1월 23 20:30:53 kyun2centos mysqld[3754]: /usr/sbin/mysqld: error while loading shared libraries: libjemalloc.so.1: cannot open shared object file: No such file or directory
 1월 23 20:33:11 kyun2centos mysqld[3841]: 2018-01-23 20:33:11 140616961231104 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
 1월 23 20:33:32 kyun2centos mysqld[3964]: 2018-01-23 20:33:32 139707756554496 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
 1월 23 20:42:37 kyun2centos mysqld[4274]: 2018-01-23 20:42:37 140639461787904 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
 1월 23 20:43:12 kyun2centos mysqld[4365]: 2018-01-23 20:43:12 140563394230528 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
 1월 23 20:48:04 kyun2centos mysqld[4553]: 2018-01-23 20:48:04 139807531911424 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
 1월 23 20:50:04 kyun2centos mysqld[4654]: 2018-01-23 20:50:04 140253162838272 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
 1월 23 20:57:30 kyun2centos mysqld[4901]: 2018-01-23 20:57:30 140003728230656 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist

Answer 1

It indicate lack library.So run

yum install libaio

yum would help you install and configure it or you can access the website to download the latest rpm package and install it manually.

Answer 2

Solution by OP.

I solve this problem through follow series of commands:

yum -y remove mariadb-libs
yum -y remove mariadb mariadb-server
cd /var/lib/ && rm -rfv mysql
yum -y install mariadb mariadb-server