Hi, I have the same problem with Openfire, Apache 2.4.4 and Strophe.
The 502 Proxy error is received in Chrome 1 min after that the request is opened (each time).
<html><head>
<title>502 Proxy Error</title>
</head><body>
<h1>Proxy Error</h1>
<p>The proxy server received an invalid
response from an upstream server.<br />
The proxy server could not handle the request <em><a href="/http-bind">POST /http-bind</a></em>.<p>
Reason: <strong>Error reading from remote server</strong></p></p>
</body></html>
And then the 503 Error (Invalid SID).
What should I do to get it to work?