Home Database Mysql Tutorial Lost connection to MySQL server at 'reading authorization packet', system error: 0_MySQL

Lost connection to MySQL server at 'reading authorization packet', system error: 0_MySQL

Jun 01, 2016 pm 01:05 PM
authorization reading

1.进入Mysqld

如果已经设置Mysql/Bin环境变量,直接在CMD里输入命令,如果没有设置Mysql环境变量,去Mysql安装目录的Bin文件夹里运行

F:\AppServ\MySQL\bin\mysql.exe -u root -p

其中root是用户名,然后就可以进入Mysql命令行环境了

2.以后的每一句Mysql命令,每次都要以分号;为结束标识,而不是以回车。

3.注意,,每次都需要重启Mysql才可以使设置生效!!

当然了,如果你直接在Mysql安装目录的 my.ini加上设置值,则可以在Mysql启动时加载设置。比如connect_timeout = 120

然后是需要更改什么参数解决这个问题

当WEB服务器负载高的时候,经常会出现这种错误,

原因:

MySQL默认connect_timeout是5秒,超过了这个时间MySQL的server端就会返回“Bad handshake”。

解决办法:

1.大多数时候设置"set global connect_timeout=60;"是可以解决问题的;

我们可以通过执行“SHOWSTATUS LIKE 'aborted%'”,可以观察到 Variable_name Value
Aborted_clients 6
Aborted_connects 15010

觉得是否要增加connect_timeout的时间,"Aborted_connects"将会随着服务端放弃客户端初始连接而增加。如果"Aborted_connects"很大,并且不断增加,就需要增加"connect_timeout".

2.在MySQL的配置文件中[mysqld]添加"skip-name-resolve",减少域名解析的时间
3.部署服务器端的网络要好,至少大于100Mbps/s
4.如果是在调用mysql_query的时候出现的问题,那就需要把"net_read_timeout"的时间调成30秒,或者60秒,或者更大的值
5.如果还不能解决问题,那估计是你的SQL语句中含有BLOB这种大类型,我们就需要增加"max_allowed_packet"的值了

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