本文介绍了mysql启动问题错误！服务器退出而不更新PID文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有什么想法吗?
Joshs-MacBook-Pro:cdwhp joshc$ mysql.server start
Starting MySQL
.. ERROR! The server quit without updating PID file (/usr/local/var/mysql/Joshs-MacBook-Pro.local.pid).
错误日志
120927 13:08:35 mysqld_safe Starting mysqld daemon with databases from /usr/local/var/mysql
120927 13:08:36 [Warning] Setting lower_case_table_names=2 because file system for /usr/local/var/mysql/ is case insensitive
120927 13:08:36 InnoDB: The InnoDB memory heap is disabled
120927 13:08:36 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120927 13:08:36 InnoDB: Compressed tables use zlib 1.2.5
120927 13:08:36 InnoDB: Initializing buffer pool, size = 128.0M
120927 13:08:36 InnoDB: Completed initialization of buffer pool
120927 13:08:36 InnoDB: highest supported file format is Barracuda.
120927 13:08:36 InnoDB: Waiting for the background threads to start
120927 13:08:37 InnoDB: 1.1.8 started; log sequence number 9531786
120927 13:08:37 [ERROR] /usr/local/Cellar/mysql/5.5.27/bin/mysqld: unknown variable 'default-character-set=utf8'
120927 13:08:37 [ERROR] Aborting
120927 13:08:37 InnoDB: Starting shutdown...
120927 13:08:37 InnoDB: Shutdown completed; log sequence number 9531786
120927 13:08:37 [Note] /usr/local/Cellar/mysql/5.5.27/bin/mysqld: Shutdown complete
120927 13:08:37 mysqld_safe mysqld from pid file /usr/local/var/mysql/Joshs-MacBook-Pro.local.pid ended
推荐答案
选项default-character-set在MySQL 5.5.3中已删除.
The option default-character-set was removed in MySQL 5.5.3.
您应该在my.cnf中将其更改为替代项；
You should change it in my.cnf to the alternative;
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