[SNMP4J] SNMP4J v2 Inform - No acknowledgment received

[George Vasilakis]

Hi.

I am new to snmp4j and have implemented a simple trap receiver using 
code from the examples.
I am using v2c informs but no acknowledgments are being received.

Here is the code for the receiver:

           threadPool = ThreadPool.create("Trap", 10);
           dispatcher = new MultiThreadedMessageDispatcher(threadPool, 
new MessageDispatcherImpl());
           listenAddress = 
GenericAddress.parse(System.getProperty("snmp4j.listenAddress", 
"udp:127.0.0.1/8080"));

           snmp = new Snmp(dispatcher);
           snmp.getMessageDispatcher().addMessageProcessingModel(new 
MPv1());
           snmp.getMessageDispatcher().addMessageProcessingModel(new 
MPv2c());
           snmp.addNotificationListener(listenAddress, this);
           snmp.listen();

Here is the code for the sender:

         Address targetAddress = GenericAddress.parse("udp:127.0.0.1/8080");
         TransportMapping transport = new DefaultUdpTransportMapping();
         Snmp snmp = new Snmp(transport);

         CommunityTarget target = new CommunityTarget();
         target.setVersion(SnmpConstants.version2c);
         target.setAddress(targetAddress);
         target.setCommunity(new OctetString("public"));
         target.setRetries(1);
         target.setTimeout(5000);
         transport.listen();

         PDU pdu = new PDU();
         pdu.setType(PDU.INFORM);
         pdu.add(new VariableBinding(SnmpConstants.sysUpTime, new 
TimeTicks(111)));
         pdu.add(new VariableBinding(SnmpConstants.snmpTrapOID, new 
OID("1.3.6.1.3.65398.3.1")));

         //Retrieve bindings from a database and add them to the pdu...

         ResponseEvent response = snmp.inform(pdu, target);
         PDU pduResponse = response.getResponse();
         System.out.println("PDU response: " + pduResponse);

The receiver receives the informs and I am able to process them 
normally, however no acknowledgments are sent back.
I would very much appreciate any help.

Thanks.
George