Cannot create PoolableConnectionFactory

Question

What is the problem? Can't connect to database?

   org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (             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.) 

Answer 1

This is the actual cause of the problem:

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

You have a database communication link problem. Make sure that your application have network access to your database (and the firewall isn't blocking ports to your database).

Answer 2

I had the same problem with localhost in the source URL. I resolved with 127.0.0.1 instead of localhost.