Hi Jochen, Thanks for the feedback. I understand that snmp4j wont resynchronize with the agent but I wondering though, shouldn't the request return the "not in time window" report instead of a null event. If not, in what case does a "not in time window" report get returned compared to a null event. Thanks again for your help. Thanks, Robert
On Mon, Nov 7, 2011 at 4:43 PM, Jochen Katz <k...@agentpp.com> wrote: > Hi, > > > You'll notice that everything is polling ok at a 10s interval until > > there is a time drift at 2011-11-04 19:32:38,500, from this point on, > > all the snmp results return null, which I assume are timeouts. Looking > > at the logs, it appears that the request should return a "Not in time > > window" exception. Also, the pcap does show a pdu report of > > "1.3.6.1.6.3.15.1.1.2.0" for the not in time window exception. Let me > > know if you need further information or see something that I'm doing > > wrong. I'll see if I can debug further as well. > > so now I can see the reason: While on the agent side only 10 seconds > have passed, your desktop time increases from 19:21:38,317 to > 19:32:38,500 (11 minutes!). So SNMP4j drops all responses of the agent, > as these are 11 minutes old, which is more than the 150 seconds time > window. > > Sorry, but SNMPv3 standard does not allow to resynchronize the engine > time in this case. > > My suggestion would be: Create a new thread that continuously sleeps for > five seconds and checks if this time drift has happend. If there was a > time drift, clear the complete time table. > > From the link you mailed before, I would have expected that the desktop > time is going too slow. What might happen is that this time drift occurs > when windows synchronizes its time with a time server. If you reduce the > time between two time synchronizations, so that the time drift is below > two minutes, SNMPv3 could handle this by itself and you would not need > the additional thread. > > Regards, > Jochen > _______________________________________________ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j
