mysql服务启动失败

[root@training ~]# systemctl start mysql
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.

使用systemctl status查看状态：

[root@training ~]# systemctl status mysql
● mysqld.service - LSB: start and stop MySQL
   Loaded: loaded (/etc/rc.d/init.d/mysqld; bad; vendor preset: disabled)
   Active: failed (Result: exit-code) since Sun 2018-05-06 10:06:53 CST; 26min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 29770 ExecStart=/etc/rc.d/init.d/mysqld start (code=exited, status=1/FAILURE)

May 06 10:06:52 training systemd[1]: Starting LSB: start and stop MySQL...
May 06 10:06:53 training mysqld[29770]: Starting MySQL.The server quit without updating PID file (/usr/local/mysql/data/mysql/training.pid).[FAILED]
May 06 10:06:53 training systemd[1]: mysqld.service: control process exited, code=exited status=1
May 06 10:06:53 training systemd[1]: Failed to start LSB: start and stop MySQL.
May 06 10:06:53 training systemd[1]: Unit mysqld.service entered failed state.
May 06 10:06:53 training systemd[1]: mysqld.service failed.

查找错误日志：

[root@training bin]# find / -name *.err
/usr/local/mysql/data/mysql/training.err
/usr/local/mysql/data/mysql/iZuf6cbbj56cbug03s58zrZ.err

打开较新的日志文件：

[root@training bin]# vim /usr/local/mysql/data/mysql/training.err

日志内容：

180505 18:03:39 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data/mysql
2018-05-05 18:03:40 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-05-05 18:03:40 0 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.6.33) starting as process 28307 ...
2018-05-05 18:03:40 28307 [Note] Plugin 'FEDERATED' is disabled.
/usr/local/mysql/bin/mysqld: Table 'mysql.plugin' doesn't exist
2018-05-05 18:03:40 28307 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
2018-05-05 18:03:40 28307 [Note] InnoDB: Using atomics to ref count buffer pool pages
2018-05-05 18:03:40 28307 [Note] InnoDB: The InnoDB memory heap is disabled
2018-05-05 18:03:40 28307 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2018-05-05 18:03:40 28307 [Note] InnoDB: Memory barrier is not used
2018-05-05 18:03:40 28307 [Note] InnoDB: Compressed tables use zlib 1.2.3
2018-05-05 18:03:40 28307 [Note] InnoDB: Using Linux native AIO
2018-05-05 18:03:40 28307 [Note] InnoDB: Using CPU crc32 instructions
2018-05-05 18:03:40 28307 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2018-05-05 18:03:40 28307 [Note] InnoDB: Completed initialization of buffer pool
2018-05-05 18:03:40 28307 [Note] InnoDB: Highest supported file format is Barracuda.
2018-05-05 18:03:40 28307 [Note] InnoDB: 128 rollback segment(s) are active.
2018-05-05 18:03:40 28307 [Note] InnoDB: Waiting for purge to start
2018-05-05 18:03:40 28307 [Note] InnoDB: 5.6.33 started; log sequence number 2045871
2018-05-05 18:03:40 28307 [Note] Server hostname (bind-address): '*'; port: 3306
2018-05-05 18:03:40 28307 [Note] IPv6 is available.
2018-05-05 18:03:40 28307 [Note]   - '::' resolves to '::';
2018-05-05 18:03:40 28307 [Note] Server socket created on IP: '::'.
2018-05-05 18:03:40 28307 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
180505 18:03:40 mysqld_safe mysqld from pid file /usr/local/mysql/data/mysql/training.pid ended
180505 18:03:51 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data/mysql
2018-05-05 18:03:51 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-05-05 18:03:51 0 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.6.33) starting as process 28465 ...
2018-05-05 18:03:51 28465 [Note] Plugin 'FEDERATED' is disabled.
/usr/local/mysql/bin/mysqld: Table 'mysql.plugin' doesn't exist
2018-05-05 18:03:51 28465 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
2018-05-05 18:03:51 28465 [Note] InnoDB: Using atomics to ref count buffer pool pages
2018-05-05 18:03:51 28465 [Note] InnoDB: The InnoDB memory heap is disabled
2018-05-05 18:03:51 28465 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2018-05-05 18:03:51 28465 [Note] InnoDB: Memory barrier is not used
2018-05-05 18:03:51 28465 [Note] InnoDB: Compressed tables use zlib 1.2.3
2018-05-05 18:03:51 28465 [Note] InnoDB: Using Linux native AIO
2018-05-05 18:03:51 28465 [Note] InnoDB: Using CPU crc32 instructions
2018-05-05 18:03:51 28465 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2018-05-05 18:03:51 28465 [Note] InnoDB: Completed initialization of buffer pool
2018-05-05 18:03:51 28465 [Note] InnoDB: Highest supported file format is Barracuda.
2018-05-05 18:03:51 28465 [Note] InnoDB: 128 rollback segment(s) are active.
2018-05-05 18:03:51 28465 [Note] InnoDB: Waiting for purge to start
2018-05-05 18:03:51 28465 [Note] InnoDB: 5.6.33 started; log sequence number 2045871
2018-05-05 18:03:51 28465 [Note] Server hostname (bind-address): '*'; port: 3306
2018-05-05 18:03:51 28465 [Note] IPv6 is available.
2018-05-05 18:03:51 28465 [Note]   - '::' resolves to '::';
2018-05-05 18:03:51 28465 [Note] Server socket created on IP: '::'.
2018-05-05 18:03:51 28465 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
180505 18:03:51 mysqld_safe mysqld from pid file /usr/local/mysql/data/mysql/training.pid ended
180505 18:19:25 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data/mysql
2018-05-05 18:19:26 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-05-05 18:19:26 0 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.6.33) starting as process 28629 ...
2018-05-05 18:19:26 28629 [Note] Plugin 'FEDERATED' is disabled.
/usr/local/mysql/bin/mysqld: Table 'mysql.plugin' doesn't exist
2018-05-05 18:19:26 28629 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

 最后竟然是通过重装，然后重启服务就好了~~

[root@training mysql]# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
[root@training mysql]# rpm -ivh mysql-community-release-el7-5.noarch.rpm
[root@training mysql]# yum install mysql-community-server
[root@training mysql]# service mysql restart

 

转载于:https://www.cnblogs.com/gamelink/p/8997508.html