Data source rejected establishment of connection, message from server: "Too many connections" is not eligible for getting processed by all BeanPostProcessors
这个错误是由于mysql连接数已达上限导致的，默认的连接数是100
在linux目录下找到/etc/my.cnf
一般连接数设置500-1000合理范围
max_connections=1000
service mysqld stop
service mysqld start
重启mysql