Alguem sabe por que desse erro , por favor me ajudem

Tue Oct 10 01:03:06 BRT 2017 WARN: Establishing SSL connection without server’s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn’t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false’. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

Isso não é um erro e sim um aviso.
Você pode desabilitar esse aviso colocando logo após o banco de dados:
?useSSL=false
ex. “jdbc:mysql://localhost/database?useSSL=false”

LeAnDr?