[SNMP4J] Freezing when creating an Snmp object

Frank Fock fock at agentpp.com
Tue Jun 14 00:18:35 CEST 2005


Norman,

May be it's the random bug then. Someone reported a problem
with the random seed initializing function on a Linux distribution 
(Redhat?).
The solution should be in the mailing list archive... somewhere...

Best regards,
Frank

Norman Elton wrote:

> Frank,
>
> I've copied the DefaultUdpTransportMapping to a new class and have  
> called SetReuseAddress(true) immediately after creating the socket.  
> This does not appear to fix the problem.
>
> Any other ideas?
>
> Thanks,
>
> Norman
>
>
> On Jun 13, 2005, at 4:19 PM, Frank Fock wrote:
>
>> Norman,
>>
>> I do not think that this problem is related to SNMP4J. What
>> operating system are you using? There are some OS where
>> reusing IP sockets may take some time. See Socket.setReuseAddress
>> for more information on this. SNMP4J does not set this option.
>> If you need it on your system, you may create your own transport  
>> mapping
>> subclass.
>>
>> Best regards,
>> Frank
>>
>> Norman Elton wrote:
>>
>>
>>> I've got the following three lines of code...
>>>
>>> TransportMapping transport = new DefaultUdpTransportMapping();
>>> snmp = new Snmp(transport);
>>> transport.listen();
>>>
>>> For some reason, the code tends to hang for anywhere from 2-30   
>>> seconds after I call the second line. I've diagnosed this by  
>>> putting  System.out calls in between each line.
>>>
>>> I've noticed that this problem is more reproducible if I execute  
>>> my  program immediately after it stops. If I wait a few minutes,  
>>> the code  runs as expected. I am calling snmp.close() before  
>>> exiting, to close  any sockets and stop the listening thread.
>>>
>>> Are there any other resources that need to be freed up? Is there  
>>> some  case that would cause the Snmp constructor to hang?
>>>
>>> Thanks,
>>>
>>> Norman Elton
>>>
>>> _______________________________________________
>>> SNMP4J mailing list
>>> SNMP4J at agentpp.org
>>> http://lists.agentpp.org/mailman/listinfo/snmp4j
>>>
>>>
>>
>>
>>
>
>





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