AS Java HTTPs Error opening socket: javax.net.ssl.SSLHandshakeException

In order to encrypt the communication between IDM and AS Java during the Initial load or any other jobs, you may want to use HTTPs instead of HTTP for a JAVA server. However, if you choose the https protocol, you may get an error in Initial Load job. Error message looks like this

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

CERT have been imported -> jre/lib/security

someone has similar problems ?

many many thanks

Stefan