Hi Prema,

No idea, what causes this. Is thios request put on a different interface
of the machine than sniffed by wireshark? Is the system dropping
the message? A Java bug (runtime issue)?

Best regards,
Frank


Am 02.10.2012 19:30, schrieb Prema Upot:
> Hi,
>
> We are encountering a situation where some SNMP messages are not going out of 
> the machine where our application(with snmp4j) is running. I see snmp4j debug 
> logs that shows messages are being sent out but wireshark dump does not have 
> this message. We matched the request id in snmp4j logs to wireshark dump to 
> make sure the message is not there.
>
> Eg: request id : 1200561071
> 2012-10-02 08:58:42,370 DEBUG  [ pool-1-thread-3           ] Running pending 
> sync request with handle PduHandle[1200561071] and retry count left 0
> 2012-10-02 08:58:42,370 DEBUG  [ pool-1-thread-3           ] Sending message 
> to 192.168.30.161/161 with length 63: 30 3d 02 01 01 04 06 70 75 62 6c 69 63 
> a0 30 02 04 47 8f 1b af 02 01 00 02 01 00 30 22 30 12 06 0e 2b 06 01 04 01 81 
> bb 56 04 05 01 13 01 01 05 00 30 0c 06 08 2b 06 01 02 01 01 05 00 05 00
>
> And after the 8 second timeout I see a log that this pending request was 
> removed(but I don't see a corresponding "Request timed out" log).
>
> 2012-10-02 08:58:50,370 DEBUG  [ pool-1-thread-3           ] Removed pending 
> request with handle: PduHandle[1200561071]
>
> I can see that the request previous to this one (id: 1200561070) and the next 
> request (id: 1200561072) went through fine.
>
> Ours is a multi threaded application. Our snmp4j wrapper code is very similar 
> to console.SnmpRequest but we use Snmp object as a singleton. A different PDU 
> is created every time we send a request.
>
> Has someone come across such an issue before ? Can someone point to possible 
> causes?
>
> Thanks,
> Prema
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