Unable to connect to Oracle DB using ojdbc8 after updating Java from 8u144 - any update after and including 8u171
Looks like the SSL handshake is failing while creating the LDAPS connection.Running the test program with the java net debugging option will help in analysing the issue.Add this option -Djavax.net.debug=all for running your test program and debug output will contain the SSL debug logs which would be useful in identifying the cause. JDK 8u171 has some security related changes.
(SSL Debug :: https://docs.oracle.com/javase/7/docs/technotes/guides/security/jsse/ReadDebug.html)