mysql - CentOS 7 中 Mariadb 启动失败

Question

我在 CentOS(CentOS Linux 版本 7.0.1406)中使用 Mariadb(mysql Ver 15.1 Distrib 5.5.40-MariaDB)。我尝试重新启动 Mariadb。

systemctl start mariadb

Job for mariadb.service failed. See 'systemctl status mariadb.service' and 'journalctl -xn' for details.

当我检查:/var/log/mysql-error.log时，按照“systemctl status mariadb.service”的建议

170523 10:20:10 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
170523 10:20:10 [Warning] 'THREAD_CONCURRENCY' is deprecated and will be removed in a future release.
170523 10:20:10 [Warning] Changed limits: max_open_files: 1024  max_connections: 214  table_cache: 400
170523 10:20:10 InnoDB: The InnoDB memory heap is disabled
170523 10:20:10 InnoDB: Mutexes and rw_locks use GCC atomic builtins
170523 10:20:10 InnoDB: Compressed tables use zlib 1.2.7
170523 10:20:10 InnoDB: Using Linux native AIO
170523 10:20:11 InnoDB: Initializing buffer pool, size = 15.6G
170523 10:20:11 InnoDB: Completed initialization of buffer pool
170523 10:20:11 InnoDB: highest supported file format is Barracuda.
170523 10:20:12  InnoDB: Waiting for the background threads to start
170523 10:20:13 Percona XtraDB (http://www.percona.com) 5.5.40-MariaDB-36.1 started; log sequence number 5336723441509
170523 10:20:13 [Note] Plugin 'FEEDBACK' is disabled.
170523 10:20:13 [ERROR] /usr/libexec/mysqld: unknown variable 'extra-lsndir=/var/tmp'
170523 10:20:13 [ERROR] Aborting

170523 10:20:13  InnoDB: Starting shutdown...
170523 10:20:15  InnoDB: Shutdown completed; log sequence number 5336723441509
170523 10:20:15 [Note] /usr/libexec/mysqld: Shutdown complete

170523 10:20:15 mysqld_safe mysqld from pid file /var/lib/mysql/master.compare-prices.repchecker.jp.pid ended
170523 10:21:10 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
170523 10:21:10 [Warning] 'THREAD_CONCURRENCY' is deprecated and will be removed in a future release.
170523 10:21:10 [Warning] Changed limits: max_open_files: 1024  max_connections: 214  table_cache: 400
170523 10:21:10 InnoDB: The InnoDB memory heap is disabled
170523 10:21:10 InnoDB: Mutexes and rw_locks use GCC atomic builtins
170523 10:21:10 InnoDB: Compressed tables use zlib 1.2.7
170523 10:21:10 InnoDB: Using Linux native AIO
170523 10:21:10 InnoDB: Initializing buffer pool, size = 15.6G
170523 10:21:11 InnoDB: Completed initialization of buffer pool
170523 10:21:11 InnoDB: highest supported file format is Barracuda.
170523 10:21:12  InnoDB: Waiting for the background threads to start
170523 10:21:13 Percona XtraDB (http://www.percona.com) 5.5.40-MariaDB-36.1 started; log sequence number 5336723441509
170523 10:21:13 [Note] Plugin 'FEEDBACK' is disabled.
170523 10:21:13 [ERROR] /usr/libexec/mysqld: unknown variable 'extra-lsndir=/var/tmp'
170523 10:21:13 [ERROR] Aborting
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PS:/var/lib/mysql目录是mysql所有的(还有一个目录mysql~是空的)

drwxr-xr-x 8 mysql mysql 4096 May 23 11:05 mysql

drwxr-xr-x. 3 mysql mysql 26 Feb 4 2015 mysql~

请提供一些建议。如何重新启动我的 mariadb，我在 mariadb 下有重要的数据库。

Answer 1

从错误的最后一行开始

[错误]/usr/libexec/mysqld:未知变量“extra-lsndir=/var/tmp”

很明显，这个变量是未知的，所以尝试从 /etc/my.cnf 中注释它，然后重试。

# Point the following paths to different dedicated disks
tmpdir         = /var/tmp
extra-lsndir = /var/tmp    ------> Comment this line 
target-dir=/var/tmp       

希望对您有所帮助。