Re:"snmpd restart" causes subagent to stop sending traps

Hello all,

is there anybody who can write some explanation regarding my problem?

And excuse me forgetting to mention one important information:
The problem was found on Red Hat Linux 3.4.6-9 with Net-SNMP 5.1.2 and confirmed with the latest version 5.4.2.1.

Thank you very much for any helpful answer.
Paul

> ------------ Original message ------------
> From: Pavel Hrdina <[email protected]>
> Subject: "snmpd restart" causes subagent to stop sending traps
> Date: 19.3.2009 15:23:42
> ----------------------------------------
> Is the Net-SNMP library designed in a way to "survive" a restart cycle of snmpd
> daemon?
> 
> I am facing a problem when my AgentX subagent stops sending traps after the
> snmpd daemon has been restarted. The subagent is a part of other program (log
> server) so it is not desirable for it to require a restart each time the snmpd
> is restarted.
> 
> I'm using the snmp_select_info (+snmp_read/snmp_timeout) in the main loop of my
> program to handle activity on SNMP sockets together with my own sockets and it
> works well. Each time I call send_v2trap to generate a trap, one SNMP socket is
> selected (it receives some kind of confirmation, probably).
> 
> When I restart the snmpd, again one SNMP socket is selected, but then the
> following snmp_select_info returns a value that is by one less then previously -
> thus one socket must have been closed and forgotten and this is probably the
> most important one (for communication with master agent) because no further
> send_v2trap is confirmed (and some SNMP socket selected) nor any trap is
> delivered to registered trapsinks.
> 
> Do any of you know about this problem and its possible solution?
> 
> Thank you,
> Paul
> 
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powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
easily build your RIAs with Flex Builder, the Eclipse(TM)based development
software that enables intelligent coding and step-through debugging.
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