WebSocket Error in connection establishment: net::ERR_CONNECTION_CLOSED

I am getting this error when I attempt to establish a wss connection with my server:

WebSocket connection to 'wss://mydomain:3000/' failed: Error in connection establishment: net::ERR_CONNECTION_CLOSED

I currently have a apache2 virtual host configuration setup to listen for requests on port 443 and 80:

<VirtualHost *:80>        ServerName otherdomainname.co.uk        ServerAlias www.otherdomainname.co.uk        RewriteEngine On        RewriteRule ^/(.*)$ /app/$1 [l,PT]        JkMount /* worker2</VirtualHost><VirtualHost _default_:443>        ServerName otherdomainname.co.uk        ServerAlias www.otherdomainname.co.uk        RewriteEngine On        RewriteRule ^/(.*)$ /app/$1 [l,PT]        SSLEngine On        SSLCertificateFile /etc/apache2/ssl/apache.crt        SSLCertificateKeyFile /etc/apache2/ssl/apache.key<Location />        SSLRequireSSL On        SSLVerifyClient optional        SSLVerifyDepth 1        SSLOptions +StdEnvVars +StrictRequire</Location>        JkMount /* worker2</VirtualHost>

As you can see it uses the JkMount to pass the request to Tomcat which serves the webpage correctly on both HTTP and HTTPS.

When I visit the site using the HTTP protocol on port 80 a WebSocket connection can be made using the ws protocol.

When I visit the site using the HTTPS protocol on port 443 the site is served correctly but no WebSocket connection is made using wss.

I am using the "ws" node.js module to provide the WebSocket server:

var WebSocketServer = require('ws').Server  , wss = new WebSocketServer({ port: 3000 }),  fs = require('fs');wss.on('connection', function connection(ws) {  ws.on('message', function incoming(message) {    console.log('received: %s', message);    ws.send(message);  ws.send('something');});

Why am I not able to successful connect to the WebSocket server using the wss protocol over https?