https://stackoverflow.com/questions/6865538/solving-a-communications-link-failure-with-jdbc-and-mysql Log in to post comments Book traversal links for 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. ‹ Can't initialize character set unknown Up [MySQL][ODBC 8.0(w) Driver]Unknown MySQL server host '3307' (0) ›