Hi, A NullPointerException at that location can be caused only by a NULL request ID. How you managed to be NULL - I don't know. Normally, SNMP4J takes care to set it. So you must have done something special.
A SNMP packet fragementation does not exists on UDP level in the way you described it (two packets with their own header). Best regards, Frank Am 17.04.2012 00:12, schrieb Amol Rao: > ...any thoughts? anyone? > > On Mon, Apr 16, 2012 at 4:09 PM, Amol Rao<xamol...@gmail.com> wrote: >> I see the following exception when trap is being sent out. Any pointers? >> >> >> java.lang.NullPointerException >> at org.snmp4j.PDU.getBERPayloadLengthPDU(PDU.java:499) >> at org.snmp4j.PDU.getBERLength(PDU.java:436) >> at org.snmp4j.mp.MPv2c.prepareOutgoingMessage(MPv2c.java:118) >> at >> org.snmp4j.MessageDispatcherImpl.sendPdu(MessageDispatcherImpl.java:444) >> at org.snmp4j.Snmp.sendMessage(Snmp.java:1078) >> at org.snmp4j.Snmp.send(Snmp.java:878) >> at org.snmp4j.Snmp.send(Snmp.java:871) >> at org.snmp4j.Snmp.send(Snmp.java:836) >> at org.snmp4j.Snmp.notify(Snmp.java:780) >> >> >> Cheers, >> Amol >> >> On Mon, Apr 16, 2012 at 1:05 PM, Amol Rao<xamol...@gmail.com> wrote: >>> Hi All: >>> Just wanted to reach out and see if anyone encountered this situation. >>> >>> I am sending out an SNMP trap (~1K size) from an agent system. When >>> manager receives the trap, its observe that its divided into multiple >>> traps and each trap carries one variable binding - which leads to >>> conclusion that the packets are getting fragmented at the SNMP level, >>> I wonder why this happens. >>> >>> I did wireshark and realized that there is no UDP level fragmentation. >>> >>> Both source (trap generation) and Destination (trap receiver) uses >>> snmp4j-1.11.jar but since on the receiving side, I have logic that >>> expects the trap to come in as one UDP packets, the whole thing breaks >>> apart. Moreover, I observed that its happening on only one system, the >>> same code works on another identical system. >>> >>> Any pointers as to why this could be happening and what is the way around? >>> >>> I am pretty sure that we are not crossing UDP packet limit, not that >>> it would matter at SNMP layer. >>> >>> Thanks. >>> >>> Cheers, >>> Amol > _______________________________________________ > SNMP4J mailing list > SNMP4J@agentpp.org > http://lists.agentpp.org/mailman/listinfo/snmp4j -- --- AGENT++ Maximilian-Kolbe-Str. 10 73257 Koengen, Germany https://agentpp.com Phone: +49 7024 8688230 Fax: +49 7024 8688231 _______________________________________________ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j