[SNMP4J] receiving traps

[Eugene R. Snider]

Most operating systems will only allow one process to bind to a port at 
a time. I would expect the first port bind to succeed and all others to 
fail but in some cases perhaps the last binding wins. Normally the trap 
receiver would handle the trap/inform message and then propagate the 
event to other on board processes using a local IPC method.
Gene

SARRA SABRINA - technolabs wrote:
> Hi all,
> I'm using snmp4j in my application  receiving trap on a fixed port
> (i.e.5110) but I noted the following problem:
>  
> If I run 2 instance of the application, I receve the traps only on the
> last instance, the port bind is done to the second instance run.
> Below there is my code of init session, is it correct?
> Is it possible to receive traps on the same port on both applications?
> Is it possible to bind the same port?
>  
> I hope somebody help me.
> Thanks,
> Best regards,
> Sabrina
>  
>     threadPool = ThreadPool.create("Trap", 2);
>     dispatcher =  new MultiThreadedMessageDispatcher(threadPool,  new
> MessageDispatcherImpl());
>      // Get Host IP Address to listen traps 
>
>     String ipaddr = getIPTrap(); 
>    String Listen_Port ="5110";
>    listenAddress = GenericAddress.parse("udp:"+ipaddr+"/"+Listen_Port);
>     TransportMapping transport;
>  
>    if (listenAddress instanceof UdpAddress) {
>        transport = new
> DefaultUdpTransportMapping((UdpAddress)listenAddress,true);
>     }
>     else {
>       transport = new
> DefaultTcpTransportMapping((TcpAddress)listenAddress);
>     }
>
>     snmp = new Snmp(dispatcher, transport);
>     snmp.getMessageDispatcher().addMessageProcessingModel(new MPv1());
>     snmp.getMessageDispatcher().addMessageProcessingModel(new MPv2c());
>     snmp.getMessageDispatcher().addMessageProcessingModel(new MPv3());
>     USM usm = new USM(SecurityProtocols.getInstance(),  new
> OctetString(MPv3.createLocalEngineID()), 0);
>     SecurityModels.getInstance().addSecurityModel(usm);
>     snmp.addTransportMapping(transport);
>     snmp.listen();
>
> <mailto:sabrina.sarra at technolabs.it> 
>
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