java-websocket

What is the procedure to change ws into wss? Whether wss is make upgrade over normal HTTP or wss works only HTTPS? webSocket = new WebSocket("ws://localhost:port/Esv/ocp"); works fine, when I changed ws to wss webSocket = new WebSocket("wss://localhost:port/Esv/ocp"); it shows this error: Error in connection establishment: net::ERR_SSL_PROTOCOL_ERROR Short version To SSL or not SSL You may have a SSL certificate issue . The connection point rule can be summarized as : wss connects on https only ws connects on http and vice-versa: https accepts wss only http accepts ws only Errors Following

I have a standard websocket endpoint based on Tyrus implementation which times to times triggers the java.lang.IllegalStateException: Cannot set WriteListener for non-async or non-upgrade request . We are running on Payara 4.1. My standard implementation @ServerEndpoint(value = "...", decoders=MessageDecoder.class, encoders=MessageEncoder.class) public class EndpointImpl extends AbstractEndpoint{ // onOpen, onClose, onMessage, onError methods } Where the abstract class is public abstract class AbstractEndpoint{ // irrelevant onOpen, onOpen handling method 117 protected void sendMessage(Session