DataWorks中mysql数据库升级到5.7的warning

报错：Establishing SSL connection without server's identity verification is not recommended.完整如下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.

原因：① mysql数据库升级到5.7之后，mysql driver会默认推荐你用SSL交互协议。ps. 如果开启SSL协议会影响10%左右的SQL性能(传输需要额外加密和解密的代价)

解决：1. 这个错误不影响，可以忽视。2. 如果难受，可以请DBA给connectionProperties里加上useSSL=false。