[...] 79 more Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source) at [...]
That is the important part of your stacktrace.
This article esplains what's happening and how to fix it.
You can try following the Mkyong article (based on the one above), that could be a little easier.
Also ensure you have configured your Application Server to support SSL and HTTPS (Tomcat Example).