jdbc:mysql://my-server-id.eu-west-1.rds.amazonaws.com/my-database?verifyServerCertificate=true&useSSL=true&requireSSL=true

! javax.net.ssl.SSLException: Unsupported record version Unknown-0.0
! at sun.security.ssl.InputRecord.checkRecordVersion(InputRecord.java:552) ~[na:1.8.0_91]
! at sun.security.ssl.InputRecord.readV3Record(InputRecord.java:565) ~[na:1.8.0_91]
! at sun.security.ssl.InputRecord.read(InputRecord.java:532) ~[na:1.8.0_91]
! at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973) ~[na:1.8.0_91]
! at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375) ~[na:1.8.0_91]
! at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403) ~[na:1.8.0_91]
! at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387) ~[na:1.8.0_91]
! at com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:149) ~[user-portal-web-0.0.1.jar:0.0.1]
! ... 40 common frames omitted

jdbc:mysql://my-server-id.eu-west-1.rds.amazonaws.com/my-database?verifyServerCertificate=true&useSSL=true&requireSSL=true&clientCertificateKeyStoreUrl=file:nokeys.jks&clientCertificateKeyStorePassword=changeit

java.lang.IllegalStateException: TrustManagerFactoryImpl is not initialized
    at sun.security.ssl.TrustManagerFactoryImpl.engineGetTrustManagers(TrustManagerFactoryImpl.java:100)
    at javax.net.ssl.TrustManagerFactory.getTrustManagers(TrustManagerFactory.java:285)
    at com.mysql.jdbc.ExportControlled.getSSLSocketFactoryDefaultOrConfigured(ExportControlled.java:323)
    at com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:85)

keytool -genkey -alias foo -keystore empty.jks # (set password "changeit")
keytool -delete -alias foo -keystore empty.jks

jdbc:mysql://my-server-id.rds.amazonaws.com/my-database?verifyServerCertificate=true&useSSL=true&requireSSL=true&clientCertificateKeyStoreUrl=file:empty.jks&clientCertificateKeyStorePassword=changeit&clientCertificateKeyStoreType=JKS&trustCertificateKeyStoreUrl=file:/etc/pki/cosmos/current/client.jks&trustCertificateKeyStoreType=JKS&trustCertificateKeyStorePassword=changeit