运行正常的论坛服务器时而出现不能连接错误是怎么回事？

韬光晦影

运行一段时间后就有这个错误，似乎装了第二个vbb论坛开始频繁了：
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (61) ( 2002 )

根据mysql官方的解释：

The error (2002) Can't connect to ... normally means that there is no MySQL server running on the system or that you are using an incorrect Unix socket filename or TCP/IP port number when trying to connect to the server.

using incorrect Unix socket filename？
一直能正常运行的server，socket filename就不对了？会不会硬盘不对劲了？
是不是下面这个原因？？我的系统是XEON，FB521+APACHE2+PHP436+MYSQL4018。

You are using Linux and one server thread has died (dumped core). In this case, you must kill the other mysqld threads (for example, with kill or with the mysql_zap script) before you can restart the MySQL server. See section A.4.2 What to Do If MySQL Keeps Crashing.