Can't get SSO working


i try to get SSO working on Spark,

Openfire-Server Ubuntu: Openfire 3.7.1 Java: 1.6.0_20 Sun Microsystems Inc. – OpenJDK 64-Bit

DC: Windows Server 2008 R2
Client: Windows 7 - Spark 2.6.3

I used
But I can’t get it working.
I can get a Ticket with the Keytab file.But when i try to connect in Spark it fail.The authentification whit LDAP works fine.
I take a look in the debug log on the Openfire, but i can’t find anything that helps. The only thing i see ist "Unwrap res:Status = BUFFER_UNDERFLOW HandshakeStatus = NOT_HANDSHAKING"
nothing about authentification fail or something.

When i enable the debugging in Spark, the all Packets Tab shows no Packets

The Raw send Packets says:
<stream:stream to="" xmlns=“jabber:client” xmlns:stream=“” version=“1.0”>

<stream:stream to=“” xmlns=“jabber:client” xmlns:stream=“” version=“1.0”>

and the Raw received Packets end with:
xmlns=“urn:ietf:params:xml:ns:xmpp-sasl”>GSSAPI</mechanis ms>zlib</stream:features>

Has anyone get Openfire 3.7.1 and Spark 2.6.3 working with SSO?
How can i get more debugging informations?

Hope you can help me

try upgrading java.


you mean the java version of the Client i’ve uptate to 6.29 but it’s still the same Problem.

Any other ideas?

no…update java on your server.