com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 1,512 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.

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    com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 1,527 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.