Spring+MySQLでMySQLの接続切れコネクション使用によるエラーの対策 - yyhayashi303's diaryこんなエラーが出てたので調べてみる。 ### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 229,658,792 milliseconds ago. The last packet sent successfully to the server was 229,658,820 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing conne
