[SNMP4J] what does protocol family unavailable exception mean

[Prathib Kumar]

Hi Frank,

I guess We have also hit upon the similar issue a while back with the mix
of IPV4 and IPV6 devices in our system (
http://markmail.org/message/dimkbvvewacon7vu) and solution which we went
was, bind to both IPV4 and IPV6 ips on the local system separatly and use
the separate transport mapping for IPV4 and IPV6 devices

But yesterday, we have seen even that was not helping. I m yet  to root
cause the actual failure.

However, if you get any clues on this problem, it would be great.

Regards
Prathib Kumar.



On Fri, Feb 28, 2014 at 1:07 PM, Frank Fock <fock at agentpp.com> wrote:

> Hi Syed,
>
> The exception might be thrown because of mixing IPv4 and IPv6 on the same
> TransportMapping which is not supported by some operating systems.
>
> In SNMP4J 2.2.6 the root cause will be included in the MessageException.
> In SNMP4J 1.x
> you may enable the debugging log level to get the original stack trace
> printed to the
> console.
>
> Best regards,
> Frank
>
>
> Am 25.02.2014 18:23, schrieb Ali, Syed F:
>
>  Hi,
>>
>> I'm using snmp4j 1.11.1 in our application and occasionally, we're seeing
>> this exception encountered when trying to send an SNMP get request:
>> org.snmp4j.MessageException: Protocol family unavailable
>>                  at org.snmp4j.MessageDispatcherImpl.sendPdu(
>> MessageDispatcherImpl.java:485)[195:org.snmp4j:1.11.1]
>>                  at org.snmp4j.util.MultiThreadedMessageDispatcher
>> .sendPdu(MultiThreadedMessageDispatcher.java:146)[195:org.snmp4j:1.11.1]
>>                  at org.snmp4j.Snmp.sendMessage(Snmp.java:1082)[195:org.
>> snmp4j:1.11.1]
>>                  at org.snmp4j.Snmp.send(Snmp.
>> java:971)[195:org.snmp4j:1.11.1]
>>                  at org.snmp4j.Snmp.send(Snmp.
>> java:955)[195:org.snmp4j:1.11.1]
>> ...
>> ... (stack truncated)
>>
>> I looked at the snmp4j code for 1.11.1 and it basically catches an
>> IOException and wraps only the message from the exception into the
>> "MessageException" as below:
>> Line 485:      throw new MessageException(iox.getMessage());
>>
>>
>> 1)      Any idea what would cause the IOException to be thrown?
>>
>>
>> 2)      If the code set the IOException as the cause of the
>> MessageException, we could unwind the whole exception cause chain, and find
>> out the root cause of the IOException, like:
>> throw new MessageException( iox );
>>
>> Thanks,
>> Syed
>>
>> Syed F. Ali
>> CA Technologies
>>
>>
>> _______________________________________________
>> SNMP4J mailing list
>> SNMP4J at agentpp.org
>> https://s16675406.onlinehome-server.info/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 at agentpp.org
> https://s16675406.onlinehome-server.info/mailman/listinfo/snmp4j
>