启动Ranger KMS Server时报错：
1.FileNotFoundException
解决方法：在系统JDK环境找到 /usr/jdk/jdk1.8.0_131/jre/lib/rt.jar 拷贝至 /usr/jdk/jdk1.8.0_131/lib/
2.Establishing SSL connection without server’s identity verification is not recommended
Thu Aug 02 17:41:47 CST 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.
Thu Aug 02 17:41:47 CST 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.
sql_mode=STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTIO
skip_ssl
2.JDBC connect string配置加上?useSSL=false：
jdbc:mysql://node3.domain/rangerkms?useSSL=false
3.java.security.InvalidKeyException: Illegal key size
JDK6
JDK7
JDK8
问题解决之后，启动ranger成功：
