Could not connect to the XMPP server via smack: No response from server

Question

I'm stuck with this problem and I can not solve it.

Code:

 ConnectionConfiguration config = new ConnectionConfiguration(host, port);
        config.setDebuggerEnabled(true);
        config.setSASLAuthenticationEnabled(true);
        config.setSecurityMode(ConnectionConfiguration.SecurityMode.enabled);

        XMPPConnection connection = new XMPPConnection(config);
try{
            connection.connect();
            connection.login(login, password);
            //auth.authenticate(login, password, host);
        }
        catch (XMPPException exc){
            exc.printStackTrace();
        }

full stack trace:

/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/bin/java -Didea.launcher.port=7544 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA 11 CE.app/bin" -Dfile.encoding=UTF-8 -classpath "/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/deploy.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/javaws.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/jce.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/plugin.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Classes/charsets.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Classes/classes.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Classes/jsse.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Classes/ui.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/ext/apple_provider.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/lib/ext/sunpkcs11.jar:/Users/dmitry/IdeaProjects/smacker/target/classes:/Users/dmitry/IdeaProjects/smacker/lib/smack-3.2.1.jar:/Users/dmitry/IdeaProjects/smacker/lib/smackx-3.2.1.jar:/Applications/IntelliJ IDEA 11 CE.app/lib/idea_rt.jar" com.intellij.rt.execution.application.AppMain Main
Connection failed. No response from server.: 
    at org.jivesoftware.smack.PacketReader.startup(PacketReader.java:119)
    at org.jivesoftware.smack.XMPPConnection.initConnection(XMPPConnection.java:568)
    at org.jivesoftware.smack.XMPPConnection.connectUsingConfiguration(XMPPConnection.java:527)
    at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:953)
    at SessionsHandler.openSession(SessionsHandler.java:62)
    at Main.main(Main.java:16)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Smack debug output:

in:

<stream:stream to="xmpp.odnoklassniki.ru" xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" version="1.0">
<starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>
<stream:stream to="odnoklassniki.ru" xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" version="1.0">
</stream:stream>

out:

<?xml version="1.0"?><stream:stream xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" from="odnoklassniki.ru" version="1.0" xml:lang="en">
<stream:features><starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>X-ODKL-API</mechanism><mechanism>X-ODKL-BLOWFISH</mechanism><mechanism>PLAIN</mechanism></mechanisms><auth xmlns='http://jabber.org/features/iq-auth'/></stream:features>
<proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>
<?xml version="1.0"?><stream:stream xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" from="odnoklassniki.ru" version="1.0" xml:lang="en">
<stream:features><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>X-ODKL-API</mechanism><mechanism>X-ODKL-BLOWFISH</mechanism><mechanism>PLAIN</mechanism></mechanisms><auth xmlns='http://jabber.org/features/iq-auth'/></stream:features>

telnet:

dmitry@pro:~$ telnet xmpp.odnoklassniki.ru 5222
Trying 217.20.145.69...
Connected to xmpp.odnoklassniki.ru.
Escape character is '^]'.

Answer 1

The Smack library (3.2.2) expecting @id attribute in the second (after starttls) "stream:stream" packet.

This attribute is optional and xmpp.odnoklassnki.ru doesn't send it:

<stream:stream to="odnoklassniki.ru" xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" version="1.0">

There are two options to solve this:

• Either to patch PacketReader to assign some kind of "fake" ID to connections without @id attribute in stream:stream packet
• or ask admins / developers of xmpp.odnoklassniki.ru to add (fake or real) ID attribute to stream:stream packet

This is a part "patched" of PacketReader:parsePackets() method. Please, note new connectionIdReceived variable and correspondent "if" condition:

// We found an opening stream. Record information about it, then notify
// the connectionID lock so that the packet reader startup can finish.
else if (parser.getName().equals("stream")) {
    // Ensure the correct jabber:client namespace is being used.
    if ("jabber:client".equals(parser.getNamespace(null))) {
        // Get the connection id.
        boolean connectionIdReceived = false;
        for (int i=0; i<parser.getAttributeCount(); i++) {
            if (parser.getAttributeName(i).equals("id")) {
                // Save the connectionID
                connectionID = parser.getAttributeValue(i);
                if (!"1.0".equals(parser.getAttributeValue("", "version"))) {
                    // Notify that a stream has been opened if the
                    // server is not XMPP 1.0 compliant otherwise make the
                    // notification after TLS has been negotiated or if TLS
                    // is not supported
                    releaseConnectionIDLock();
                }
                connectionIdReceived = true;
            }
            else if (parser.getAttributeName(i).equals("from")) {
                // Use the server name that the server says that it is.
                connection.config.setServiceName(parser.getAttributeValue(i));
            }
        }
        if (!connectionIdReceived) {
            connectionID = "<unspecified>";
            if (!"1.0".equals(parser.getAttributeValue("", "version"))) {
                // Notify that a stream has been opened if the
                // server is not XMPP 1.0 compliant otherwise make the
                // notification after TLS has been negotiated or if TLS
                // is not supported
                releaseConnectionIDLock();
            }
        }
    }
}

Answer 2

I see a couple of possibilities:

• The cert you're getting from the server is not being accepted by your library because of trust chain or the *-name that the server is offering:

Subject: C=RU, L=Moscow, O=Odnoklassniki Ltd, CN=*.odnoklassniki.ru

• In "secure" mode, your library doesn't like any of the auth mechanisms that are offered by that server, since there are only two non-standard mechanisms (X-ODKL-API, X-ODKL-BLOWFISH) and two less-secure mechanisms (PLAIN, http://jabber.org/features/iq-auth).

If I had to guess it would be the second. That's not an error condition that most client library authors are unlikely to run into. Turn off the security modes, and try again.