I think the error in the stack trace mentioned means that the cert is
not trusted.
What CA do you use? Does the corresponding CA has the root CA cert
installed in cacerts.jks?
Note that when you install the certs or keys, we need to make sure that
the key/cert password
is the same as keystore password.
If you want more debug info, try to put the JVM option
-Djavax.net.debug=ssl,handshake
and restart the server.