[SNMP4J] SNMP messages are not being send out

[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