Data source rejected establishment of connection, message from server: “Too many connections“

异常信息：Data source rejected establishment of connection, message from
server: “Too many connections”

原因：
数据库超过最大连接数了
查询当前最大连接数

select VARIABLE_VALUE from information_schema.GLOBAL_VARIABLES where VARIABLE_NAME='MAX_CONNECTIONS'; 

set global max_connections = 1000;

//重新启动MySQL后使用下面的命令查看修改是否成功

#mysqladmin -uroot -p variables

Password:

//可以看到以下项说明修改成功

| max_connections | 1000

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原文链接：https://blog.csdn.net/ljphhj/article/details/23804057