I work with CUCM 11.5 and trying to implement simple chat bot using Smack library for Java, that works with XMPP protocol. Message delivery works for user-to-user chats in DevNet Sandbox environment, but on a real installation, though it is possible to establish connection and login, messages aren't delivered at all, and server reports internal error. Unfortunately I have no access to server logs. Are there any ideas, what is the root cause of the problem and how it could be solved?
[INFO ] 2018-01-31 11:46:51.750 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <stream:stream xmlns='jabber:client' to='intra.net' xmlns:stream='http://etherx.jabber.org/streams' version='1.0' from='bot@intra.net' xml:lang='en'>
[INFO ] 2018-01-31 11:46:51.751 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <stream:stream xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:client' xml:lang='en-US.UTF-8' id='2AB633F4F97C0' from='intra.net' to='bot@intra.net' version='1.0'>
[INFO ] 2018-01-31 11:46:51.756 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <stream:features><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>PLAIN</mechanism><mechanism>CISCO-VTG-TOKEN</mechanism><hostname xmlns='urn:xmpp:domain-based-name:0'>pres-sub.intra.net</hostname><hostname xmlns='urn:xmpp:domain-based-name:0'>pres-pub.intra.net</hostname></mechanisms></stream:features>
[INFO ] 2018-01-31 11:46:51.757 [main] Debug - Successfully connected to host
[INFO ] 2018-01-31 11:46:51.835 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>AGJvdAAxMjM0</auth>
[INFO ] 2018-01-31 11:46:51.882 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>
[INFO ] 2018-01-31 11:46:51.883 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <stream:stream xmlns='jabber:client' to='intra.net' xmlns:stream='http://etherx.jabber.org/streams' version='1.0' from='bot@intra.net' id='2AB633F4F97C0' xml:lang='en'>
[INFO ] 2018-01-31 11:46:51.884 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <stream:stream xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:client' xml:lang='en-US.UTF-8' id='2AB633F4F97C0' from='intra.net' to='bot@intra.net' version='1.0'>
[INFO ] 2018-01-31 11:46:51.924 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <stream:features><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/><session xmlns='urn:ietf:params:xml:ns:xmpp-session'/><sm xmlns='urn:xmpp:sm:3'><optional/></sm><mdm xmlns='http://protocols.cisco.com/mdm:1'><optional/></mdm></stream:features>
[INFO ] 2018-01-31 11:46:51.928 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <iq id='6WomI-3' type='set'><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><resource>Smack</resource></bind></iq>
[INFO ] 2018-01-31 11:46:51.967 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <iq id='6WomI-3' type='result'><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><jid>bot@intra.net/Smack</jid></bind></iq>
[INFO ] 2018-01-31 11:46:51.972 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <iq from='bot@intra.net/Smack' id='6WomI-5' type='set'><session xmlns='urn:ietf:params:xml:ns:xmpp-session'/></iq>
[INFO ] 2018-01-31 11:46:51.973 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <iq id='6WomI-5' to='bot@intra.net/Smack' type='result'/>
[INFO ] 2018-01-31 11:46:51.974 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <enable xmlns='urn:xmpp:sm:3' resume='true'/>
[INFO ] 2018-01-31 11:46:51.991 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <enabled id='3fac25e9-ecba-4e53-bccd-06cbe1600a18' max='60' resume='true' xmlns='urn:xmpp:sm:3'/>
[INFO ] 2018-01-31 11:46:51.993 [main] Log4jDebugger - User logged (0): bot@intra.net:5222/Smack
[INFO ] 2018-01-31 11:46:51.996 [main] Log4jDebugger - XMPPConnection authenticated (XMPPTCPConnection[bot@intra.net/Smack] (0))
[INFO ] 2018-01-31 11:46:51.996 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <iq from='bot@intra.net/Smack' id='6WomI-7' type='get'><query xmlns='jabber:iq:roster'></query></iq>
[INFO ] 2018-01-31 11:46:51.997 [main] Debug - Successfully performed login
[INFO ] 2018-01-31 11:46:51.997 [main] Debug - Login: OK
[INFO ] 2018-01-31 11:46:51.997 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <presence from='bot@intra.net/Smack' id='6WomI-8'><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.igniterealtime.org/projects/smack' ver='NfJ3flI83zSdUDzCEICtbypursw='/></presence>
[INFO ] 2018-01-31 11:46:52.000 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <iq from='bot@intra.net/Smack' id='6WomI-7' type='result' xml:lang='en'><query xmlns='jabber:iq:roster'/></iq>
[INFO ] 2018-01-31 11:46:52.002 [main] Debug - Sending message: OK
[INFO ] 2018-01-31 11:46:52.002 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <message to='user@intra.net' from='bot@intra.net/Smack' id='6WomI-10' type='chat'><body>Hello: Basic send</body></message><r xmlns='urn:xmpp:sm:3'/>
[INFO ] 2018-01-31 11:46:52.007 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <presence from='bot@intra.net/Smack' id='6WomI-8' to='bot@intra.net' xml:lang='en'><c hash='sha-1' node='http://www.igniterealtime.org/projects/smack' ver='NfJ3flI83zSdUDzCEICtbypursw=' xmlns='http://jabber.org/protocol/caps'/></presence>
[INFO ] 2018-01-31 11:46:52.008 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <presence from='bot@intra.net/composed' to='bot@intra.net/Smack' type='unavailable'><c hash='sha-1' node='http://cisco.com/cup/caps' ver='L0mwOaX6n8VnczsxLk2dMU2QzAg=' xmlns='http://jabber.org/protocol/caps'/><priority>-1</priority><presence entity='sip:bot@intra.net' xmlns='urn:ietf:params:xml:ns:pidf'><person id='bot' xmlns='urn:cisco:params:xml:ns:pidf:rpid'><activities><unavailable/></activities></person><tuple id='default' xmlns='urn:ietf:params:xml:ns:pidf'><status><basic>closed</basic></status></tuple></presence><x from='bot@intra.net/composed' stamp='20180119T12:13:31' xmlns='jabber:x:delay'/></presence>
[INFO ] 2018-01-31 11:46:52.049 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <presence from='bot@intra.net/composed' to='bot@intra.net'><c hash='sha-1' node='http://cisco.com/cup/caps' ver='L0mwOaX6n8VnczsxLk2dMU2QzAg=' xmlns='http://jabber.org/protocol/caps'/><priority>127</priority><presence entity='sip:bot@intra.net' xmlns='urn:ietf:params:xml:ns:pidf'><person id='bot' xmlns='urn:cisco:params:xml:ns:pidf:rpid'><activities><available/><phone-status>unavailable</phone-status><im-status>available</im-status></activities></person><tuple id='JabberSmack' xmlns='urn:ietf:params:xml:ns:pidf'><status><basic>open</basic></status><servcaps xmlns='urn:ietf:params:xml:ns:pidf:servcaps'><type>text/plain</type><type>application/x-cisco-cupc+xml</type><text>true</text></servcaps></tuple></presence></presence><a h='3' xmlns='urn:xmpp:sm:3'/>
[INFO ] 2018-01-31 11:46:52.081 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <message from='user@intra.net' id='6WomI-10' to='bot@intra.net/Smack' type='error' xml:lang='en'><body>Hello: Basic send</body><error code='500' type='wait'><internal-server-error xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/></error></message>
[INFO ] 2018-01-31 11:46:52.121 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): <r xmlns='urn:xmpp:sm:3'/>
[INFO ] 2018-01-31 11:46:52.122 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <a xmlns='urn:xmpp:sm:3' h='5'/>
[INFO ] 2018-01-31 11:46:54.003 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): <presence from='bot@intra.net/Smack' id='6WomI-15' type='unavailable'></presence><a xmlns='urn:xmpp:sm:3' h='5'/>
[INFO ] 2018-01-31 11:46:54.003 [Smack Packet Writer (0)] Log4jDebugger - SENT (0): </stream:stream>
[INFO ] 2018-01-31 11:46:54.004 [Smack Packet Reader (0)] Log4jDebugger - RECV (0): </stream:stream>
