http://www.oschina.net/question/558677_66703
com.mysql.jdbc.exceptions.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections"
"Too many connections"错误
尝试加大 MySQL 的 max_connections 配置吧，好好检查服务是否有连接泄漏的问题，关键是有没有关闭连接
mysql默认配置的是100，创行服务器配置的都是1000，可以借鉴
