mysql 权限问题 Permission denied: connect

Servlet.service() for servlet [mvc-dispatcher] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLNonTransientConnectionException: Could not connect to localhost:3308 : Permission denied: connect] with root cause
java.net.SocketException: Permission denied: connect
重装的服务器系统，重新部署的一个tomcat ,里面有3,4个项目，和特定的请求没关系，因为相同请求大部分时候是好的，隔一段时间就会报这个错误。除非重启mysql服务才恢复正常。