[SNMP4J] v3 NPE

[Zhan Yi]

Hi Frank,

Below is the sample code that will reproduce the problem. 
I have no way to solve this problem, can you give some advice.

Best Regards
Zhan Yi

public class TestSnmp4J {
    
    public static void main(String [] args) throws Exception {
        String [] params1={"-t", "5000", "-u","cisco","-a","MD5","-A","auth","-x","DES","-X","priv","-Ow","13.253.253.253/161", "1.3.6.1.2.1"};
        walkThread(params1);
        String [] params2={"-t", "5000", "-u","peter","-a","MD5","-A","12345678","-x","DES","-X","12345678", "-Ow", "13.100.200.39/161", "1.3.6.1.2.1"};
        walkThread(params2);
    }
    
    static void walkThread(final String [] params) {
        new Thread(new Runnable() {
            public void run() {
                try {
                    org.snmp4j.tools.console.SnmpRequest.main(params);
                }catch(Exception ex) {
                    ex.printStackTrace();
                }
            }
        }).start();
    }


----- Original Message ----- 
From: "Frank Fock" <fock at agentpp.com>
To: "Zhan Yi" <zhanyi at vanlink.com.cn>
Cc: <snmp4j at agentpp.org>
Sent: Tuesday, June 08, 2004 3:02 AM
Subject: Re: [SNMP4J] v3 NPE


> Hi Zhan,
> 
> This error occurs when the USM returns an error while preparing
> the outgoing message (most likely because the user is not known
> to the USM which is referenced by the scoped PDU). That the NPE
> is thrown is a bug, although it should not happen in a properly
> setup application. The next SNMP4J version will throw a
> MessageException here instead a NPE.
> 
> Best regards,
> Frank
> 
> Zhan Yi wrote:
> 
> >Hi,
> >
> >I got NPE occasionally using snmp v3 and running multiple concurrent threads.
> >Can you give some hint on how to understand and solve this problem? Using v1 there is no problem.
> >
> >java.lang.NullPointerException
> >        at org.snmp4j.MessageDispatcherImpl.sendPdu(MessageDispatcherImpl.java:330)
> >        at org.snmp4j.Snmp.send(Snmp.java:285)
> >        at org.snmp4j.Snmp$PendingRequest.run(Snmp.java:661)
> >        at java.util.TimerThread.mainLoop(Timer.java:432)
> >        at java.util.TimerThread.run(Timer.java:382)
> >
> >Thank you!
> >
> >
> >Best Regards
> >Zhan Yi
> >  
> >
> >------------------------------------------------------------------------
> >
> >_______________________________________________
> >SNMP4J mailing list
> >SNMP4J at agentpp.org
> >http://p15141779.pureserver.info/mailman/listinfo/snmp4j
> >  
> >
> 
> 
>