Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
 

이런 에러 뜨는데 구글링해보니 interactiveClient=true&autoReconnectForPools=true을 url에 넣으라해서 넣는데도 차이가 없는데 


이거 해결해본 형 있음?