[SNMP4J] I loose the response PDU with asynchronous send method
Rodolfo Josÿffffe9 Castellanos Jaimes
rodolfojcj at yahoo.com
Fri Mar 11 10:06:15 CET 2005
Hi friends,
When I say "I think the timeout shouldn't has
influence because the tests are in the same machine
and there shouldn't be delay between the request and
the response.", that I mean is that the response and
the request are processed in the same computer (my
desktop computer). The "manager" and the "agent" are
the same: localhost.
Bye,
Rodolfo José Castellanos Jaimes.
--- Rodolfo Josÿffffe9 Castellanos Jaimes
<rodolfojcj at yahoo.com> escribió:
> Hi Frank, thanks for your answer.
>
> By default I have a timeout of 1000 micro seconds.
> I've tested increasing this time and the behavior is
> the same. For example I've set the timeout to 5000
> micro seconds. I think the timeout shouldn't has
> influence because the tests are in the same machine
> and there shouldn't be delay between the request and
> the response.
>
> I've just changed the asynchronous "send" method by
> its equivalent synchronous one. And here the
> behavior
> is correct: I always get the response.
>
> Now, I'm doing this:
> ////
> ...
> ...
> ...
> PDU responsePDU = null;
> ResponseEvent responseEvent = null;
> responseEvent = snmp.send( requestPDU, target );
> if ( responseEvent != null )
> responsePDU = responseEvent.getResponse();
> snmp.close();
> // then, I process the response to show the
> output...
> ...
> ...
> ...
> ///
>
> And the output is like this:
>
> ///////////// *) Always successful for me !!!
>
> [rodolfojcj at gandalf testPrograms]$ java -cp
> .:lib/SNMP4J.jar:lib/log4j-1.2.7.jar
> ProgramWithSnmp4J
> Se ha creado la vista
> 0 [main] DEBUG org.snmp4j.security.Salt -
> Initialized
> Salt to c545429a6909c503.
> 75 [main] DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping -
> Sending message to 150.187.64.101/161 with length
> 43:
>
30:29:02:01:00:04:06:70:75:62:6c:69:63:a0:1c:02:04:67:fe:98:a0:02:01:00:02:01:00:30:0e:30:0c:06:08:2b:06:01:02:01:01:03:00:05:00
> 81 [main] DEBUG org.snmp4j.Snmp - New pending
> request
> with handle PduHandle[1744738464]
> 180 [Thread-1] INFO
> org.snmp4j.transport.DefaultUdpTransportMapping -
> UDP
> receive buffer size for socket 150.187.64.101/0 is
> set
> to: 32767
> 181 [Thread-1] DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping -
> Received message from
> gandalf.unet.edu.ve/150.187.64.101/161 with length
> 46:
>
30:2c:02:01:00:04:06:70:75:62:6c:69:63:a2:1f:02:04:67:fe:98:a0:02:01:00:02:01:00:30:11:30:0f:06:08:2b:06:01:02:01:01:03:00:43:03:03:d2:c9
> 278 [Thread-1] DEBUG org.snmp4j.Snmp - Removing
> pending request with handle PduHandle[1744738464]
> Se ha recibido el evento pduArrived...
>
>
> Error Index = 0
> Error Status = 0
> Error Status Text = Success
> PDU Type Number = -94
> PDU Type String = RESPONSE
> OID = Value ...
> There are 1 responsed variables
> 1.3.6.1.2.1.1.3.0 = 0:41:45.69
> /////////////
>
> I will be more tests to see if I can catch what is
> hapenning, and thanks again by the answers.
>
> Bye,
> Rodolfo José Castellanos Jaimes
>
> --- Frank Fock <fock at agentpp.com> escribió:
> > Hi Rodolfo,
> >
> > Have you tried to increase the timeout value for
> > your target yet?
> > It seems that the agent's response is received too
> > late (the timeout
> > has already removed the corresponding request
> > object).
> >
> > Best regards,
> > Frank
> >
> > Rodolfo Josÿffffe9 Castellanos Jaimes wrote:
> >
> > >Hi friends.
> > >
> > >I have the following code to send a GET PDU to
> > >localhost. I'm testing with asynchronous methods.
> > >
> > >This is the code of the method that I use to send
> > the
> > >PDU (I'm guiding me by the snmp4j_tool console
> app.
> > >source code and some others that I've written):
> > >
> > >///////////
> > >
> > >public void send()
> > >{
> > > try
> > > {
> > > this.target = createTarget();
> > > target.setVersion( snmpVersion );
> > > target.setAddress( targetAddress );
> > > target.setRetries( maxRetries );
> > > target.setTimeout( timeout );
> > >
> > > Snmp snmp = createSnmpSession();
> > > snmp.listen();
> > >
> > > // create the request PDU
> > > PDU requestPDU = createPDU( target );
> > >
> > > if ( requestPDU.getType() == PDU.GETBULK )
> > > {
> > > }
> > > for ( int i=0; i <
> > variableBindingsVector.size();
> > >i++)
> > > {
> > > // add the variables that will be requested
> > > requestPDU.add( variableBindingsVector.get(
> i
> > )
> > >);
> > > }
> > > // the listener that will "listen" the
> response
> > >PDU
> > > ResponseListener responseListener =
> > >createResponseListener();
> > > // send the PDU
> > > snmp.send(requestPDU, target , null,
> > >responseListener);
> > > }
> > > catch( IOException ioe )
> > > {
> > > }
> > >} // end method send
> > >
> > >///////////
> > >
> > >Then, I compile and run a test application that
> > >request some variables within the MIB-II System
> > group.
> > >
> > >When I run it, sometimes I get the response PDU
> > (which
> > >I process to produce some output) but sometimes I
> > get
> > >no answer.
> > >
> > >Here I show you two samples of differents
> outputs.
> > I
> > >put the Logger Level to Level.ALL with the aim of
> > see
> > >what could be hapenning. These outputs are
> produced
> > by
> > >the same code, in the same machine, with the same
> > >packages of SNMP4J and Log4J.
> > >
> > >///// 1) Not successful for me
> > >[rodolfojcj at gandalf testPrograms]$ java -cp
> > >.:lib/SNMP4J.jar:lib/log4j-1.2.7.jar
> > >ProgramWithSnmp4J
> > >Se ha creado la vista
> > >Se ha agregado el PduListener
> > >0 [main] DEBUG org.snmp4j.security.Salt -
> > Initialized
> > >Salt to 1c9c18862b9d60ca.
> > >85 [Thread-1] INFO
> > >org.snmp4j.transport.DefaultUdpTransportMapping
> -
> > UDP
> > >receive buffer size for socket 150.187.64.101/0
> is
> > set
> > >to: 32767
> > >163 [main] DEBUG
> > >org.snmp4j.transport.DefaultUdpTransportMapping
> -
> > >Sending message to 150.187.64.101/161 with length
> > 43:
>
=== message truncated ===
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