[SNMP4J] Response is null, Why?

[Shuji Urano]

Hi there:

I am new in SNMP4j.

Now I want to get a information via SNMP4j as follows.

  try
  {
   Snmp snmp = new Snmp("public");
   Address targetAddress = GenericAddress.parse("udp:192.168.100.5/161");
   CommunityTarget target = new CommunityTarget(targetAddress, new 
OctetString("public"));

   target.setVersion(SnmpConstants.version2c);
   target.setRetries(2);
   target.setTimeout(1500);

   PDU pdu = new PDU();

   pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.2.2.1.10")));
   pdu.setType(PDU.GET);

   ResponseEvent responseEvent = snmp.get(pdu, target);
   if (responseEvent.getResponse() == null)                           // I 
need a information, but it returns null
    System.err.println("TIME OUT");

   // extract the response PDU (could be null if timed out)
   PDU responsePDU = responseEvent.getResponse();
  }
  catch (Exception ex)
  {
   System.err.println(ex.getMessage());
  }

Please show me where is wrong.

Shuji