If you have a runtime image without module jdk.crypto.ec but try to connect to a service that needs it like Discord, this library complains that the hostname does not match which is plainly wrong and very misleading:
$ rm -rf jre
$ ~/.gradle/jdks/jdk-17+35/bin/jlink --add-modules jdk.jshell,jdk.zipfs --output jre
$ jre/bin/jshell.exe -c nv-websocket-client-2.6.jar
| Welcome to JShell -- Version 17
| For an introduction type: /help intro
jshell> new com.neovisionaries.ws.client.WebSocketFactory().createSocket("wss://gateway.discord.gg").connect()
| Exception com.neovisionaries.ws.client.HostnameUnverifiedException: The certificate of the peer does not match the expected hostname (gateway.discord.gg)
| at SocketConnector.verifyHostname (SocketConnector.java:171)
| at SocketConnector.doConnect (SocketConnector.java:126)
| at SocketConnector.connect (SocketConnector.java:83)
| at WebSocket.connect (WebSocket.java:2307)
| at (#1:1)
jshell>
$ rm -rf jre
$ ~/.gradle/jdks/jdk-17+35/bin/jlink --add-modules jdk.jshell,jdk.zipfs,jdk.crypto.ec --output jre
$ jre/bin/jshell.exe -c nv-websocket-client-2.6.jar
| Welcome to JShell -- Version 17
| For an introduction type: /help intro
jshell> new com.neovisionaries.ws.client.WebSocketFactory().createSocket("wss://gateway.discord.gg").connect()
$1 ==> com.neovisionaries.ws.client.WebSocket@6f4a47c7
jshell>
If you have a runtime image without module
jdk.crypto.ecbut try to connect to a service that needs it like Discord, this library complains that the hostname does not match which is plainly wrong and very misleading: