MYSQL不能连接了,错误ERROR 1129 (00000): Host ” is blocked because of many connection errors;
2016-08-24 19:37
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MYSQL连接报错,错误ERROR 1129 (00000): Host ” is blocked because of many connection errors;
有一次在工作中偶然遇到了这个问题,我的可以连接没问题,同事说数据库连不上,开始以为连接数太小了,后来发现连接数够大,于是上网查询到了解决方法:错误的大意:有太多连到mysql服务器的连接,连到一半就断了,也就是说尝试连接mysql没有成功!
出错的原因:这个同事尝试登陆mysql次数太多了,并且都没有登陆成功~~
简单叙述连mysql的流程:
1.根据mysql的连接协议,发起握手,这在网络层面。
2.mysql服务器在内存上创建客户端连接的数据结构。
3.连接认证,就是看看客户端的权限,如用户名,密码允许不
4.监听端口,等待命令
解决办法:
执行mysqladmin flush-hosts命令或者 FLUSH HOSTS 命令
mysqladmin flush-host /* FLUSH HOSTS*/
说明:系统变量max_connect_errors设置了允许中断的次数,超过了这个次数,mysql就报上边的错,因为它觉得可能哪里有问题(难道是恶意攻击?),然后它就不让新的连接连了, 默认max_connect_errors 是10,但可动态调,不过调max_connect_errors 不是根本解决办法
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