Establishing SSL connection without server's identity verification is not recommended

Tue Jul 03 17:21:16 KST 2018 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.

원인 : 다른 컴퓨터에 있는 SQL 접속시 서버에서 안전하지 않은 SSL요청을 거부하는 것 같다.

해결 : SQL url 뒤에 " &useSSL=false " 로 설정하니 해결