Repost: [SNMP4J] Problem receiving traps

[Mauricio Reyes]

Hello Noel,

I have tested the SNMP4J tool without any modification, configured to listen 
to traps from the snmpd demon, printed to the console. And it works fine. 
The traps are received as expected. But in my application it stops 
receiving. Basically I build a class that launches two threads one to send 
and another to listen form traps. What the class does is do some 
calculations and draw some information in a JFrame. I don't know if this is 
why it stops working. The run method in the thread is like this:

public void run()
  {
    try
    {
        if (operation == LISTEN)
        {
          listen();
        }
    }
    catch (IOException ex)
    {
        System.err.println("Error escuchando solicitud Traps: " + 
ex.getMessage());
        ex.printStackTrace();
    }
  }

I just call the listen method as in the SnmpRequest file. Would all the code 
help?

I haven't been able to trace the error. What could change from using this in 
a thread and using it as in SnmpRequest?

Thanks.
Mauricio

>From: Noel Grandin <noel at peralex.com>
>To: Mauricio Reyes <maure5 at hotmail.com>
>CC: snmp4j at agentpp.org
>Subject: Re: Repost: [SNMP4J] Problem receiving traps
>Date: Fri, 15 Apr 2005 07:58:34 +0200
>
>
>Try running ethereal and capturing packets to trace the activity.
>
>Mauricio Reyes wrote:
>>
>>Hello,
>>
>>I don't think the thread dies. Because when I shut down the snmpd demon 
>>and bring it up again I start to receive traps again. It seems to receive 
>>only 4 traps and then stops receiving.
>>
>>I have no idea what's happening.
>>
>>>From: Noel Grandin <noel at peralex.com>
>>>To: Mauricio Reyes <maure5 at hotmail.com>
>>>CC: snmp4j at agentpp.org
>>>Subject: Re: Repost: [SNMP4J] Problem receiving traps
>>>Date: Thu, 14 Apr 2005 08:18:24 +0200
>>>
>>>Maybe the thread died?
>>>
>>>If you are running an older JDK you may not see the stack trace if 
>>>something goes wrong.
>>>In newer JDKs you can install an "uncaught exception handler" on a 
>>>Thread.
>>>
>>>Mauricio Reyes wrote:
>>>
>>>>
>>>>Hello,
>>>>
>>>>The problem keeps on going. Can anyone help me?
>>>>
>>>>Thanks a lot.
>>>>
>>>>>From: "Mauricio Reyes" <maure5 at hotmail.com>
>>>>>To: snmp4j at agentpp.org
>>>>>Subject: [SNMP4J] Problem receiving traps
>>>>>Date: Sun, 10 Apr 2005 22:04:55 +0000
>>>>>
>>>>>
>>>>>Hello,
>>>>>
>>>>>I've been having some trouble receiving traps from net-snmp. The 
>>>>>sitiuation is like this: the snmpd demon registers an alarm to send a 
>>>>>trap every 60 seconds, and it works fine (snmptrapd receives the traps 
>>>>>every minute). The thing is that SNMP4J recieves two traps and then it 
>>>>>seems to stop receiveing traps. I don't know why this happens. I'm 
>>>>>running a thread that is in charge of receiving the traps.
>>>>>
>>>>>Thanks a lot for your collaboration.
>>>>>
>>>>>Mauricio.
>>>>>
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