Activti7 与mysql数据库连接问题

WARN Execution of ping query 'select now()' failed: The last packet successfully received from the server was 58,687,904 milliseconds ago.  The last packet sent successfully to the server was 58,687,904 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

activiti版本是7.1.0.M4  mysql：5.7