[SNMP4J] Registering multiple managed objects and org.snmp4j.agent.DuplicateRegistrationException error

[Marek Hajduczenia]

Hi Frank, 

Thank you for the quick answer. 

I removed the "dots" from the OID numbers, but the problem still remains. I
did not find any standard MIBs that have OID 1.3.6.1.3.22.1 so I am not
quite sure why there would be a clash here. This is the first time I
register the OIDs in my agent and there are no other agents running on my
machine that could use this particular OID value. 

Also, I'd very much appreciate if you could point me to any code that
provides the definition of my own OID root. I could not find that in the
sample agent code. 

Thank you in advance

Marek

-----Original Message-----
From: snmp4j-bounces at agentpp.org [mailto:snmp4j-bounces at agentpp.org] On
Behalf Of Frank Fock
Sent: Saturday, 30 March, 2013 2:37 PM
To: snmp4j at agentpp.org
Subject: Re: [SNMP4J] Registering multiple managed objects and
org.snmp4j.agent.DuplicateRegistrationException error

Hi,

First, OIDs start with a number, not a dot.
Second, you need to register your own OID root. You must not define any OIDs
in subtrees of other vendors or standard MIB modules.
In your case, your OIDs clash with other OIDs in the agent -> that's why a
DuplicateRegistrationException is being thrown.

Best regards,
Frank

Am 30.03.2013 14:35, schrieb Marek Hajduczenia:
> Dear colleagues,
>
>   
>
> I am continuing the development of my project and now I have a rather 
> simple task that keeps on generating errors for some reason I do not 
> quite understand. But let me first describe what I am doing and what 
> the output
> is:
>
>   
>
> [1] I create 4 individual OID to be used later on
>
>   
>
> OID oidLocalHostName = new OID(".1.3.6.1.3.22.1.1"); // nomeServidor
>
> OID oidRootFolder = new OID(".1.3.6.1.3.22.1.2"); // diretoriaBase
>
> OID oidDefaultPlayer = new OID(".1.3.6.1.3.22.1.3"); // musicPlayer
>
> OID oidNumberOfMusicFiles = new OID(".1.3.6.1.3.22.1.4"); // 
> nTotalmMsicasDisp
>
>   
>
> [2] then I try to register individual new managed objects as follows
>
>   
>
> server.registerManagedObject(MOCreator.createReadOnly(oidLocalHostName
> , java.net.InetAddress.getLocalHost().getHostName()));
>
> server.registerManagedObject(MOCreator.createReadOnly(oidDefaultPlayer
> , "VLC")); // HERE IS THE LINE WITH ERROR
>
> server.registerManagedObject(MOCreator.createReadOnly(oidRootFolder,
> folder.getAbsolutePath()));
>
> server.registerManagedObject(MOCreator.createReadOnly(oidNumberOfMusic
> Files,
> 0));
>
>   
>
> the function registerManagedObject is just a simple wrapper defined as
> follows:
>
>   
>
>         public void registerManagedObject(ManagedObject mo)
>
>         {
>
>                try
>
>                {
>
>                       server.register(mo, null);
>
>                }
>
>                catch (DuplicateRegistrationException ex)
>
>                {
>
>                       throw new RuntimeException(ex);
>
>                }
>
>         }
>
>   
>
> I get however the following error on console:
>
>   
>
> 208 [main] INFO org.snmp4j.agent.DefaultMOServer  - Registered MO 
> org.snmp4j.agent.mo.MOScalar[oid=1.3.6.1.3.22.1.1,access=org.snmp4j.ag
> ent.mo .MOAccessImpl at 3ce3e8f3,value=Marek-HP,volatile=false] in 
> default context with scope 
> org.snmp4j.agent.mo.MOScalar[oid=1.3.6.1.3.22.1.1,access=org.snmp4j.ag
> ent.mo .MOAccessImpl at 3ce3e8f3,value=Marek-HP,volatile=false]
>
> Exception in thread "main" java.lang.RuntimeException:
> org.snmp4j.agent.DuplicateRegistrationException:
>
org.snmp4j.agent.DefaultMOContextScope[context=null,lowerBound=1.3.6.1.3.22.
> 1,lowerIncluded=true,upperBound=1.3.6.1.3.22.2,upperIncluded=false]
>
>         at
> org.snmpagent.snmpAgentServer.registerManagedObject(snmpAgentServer.ja
> va:177
> )
>
>         at
> org.snmpagent.snmpAgentClientMain.main(snmpAgentClientMain.java:160)
>
> Caused by: org.snmp4j.agent.DuplicateRegistrationException:
>
org.snmp4j.agent.DefaultMOContextScope[context=null,lowerBound=1.3.6.1.3.22.
> 1,lowerIncluded=true,upperBound=1.3.6.1.3.22.2,upperIncluded=false]
>
>         at
> org.snmp4j.agent.DefaultMOServer.register(DefaultMOServer.java:279)
>
>         at
> org.snmpagent.snmpAgentServer.registerManagedObject(snmpAgentServer.ja
> va:173
> )
>
>         ... 1 more
>
>   
>
> With the information that the content was registered at OID of
> 1.3.6.1.3.22.1.1 (oidLocalHostName) with the default context (null). 
> The attempt to perform registration for OID of 1.3.6.1.3.22.2 causes 
> the org.snmp4j.agent.DuplicateRegistrationException for some reason. I 
> looked through the documentation associated with this error, but 
> cannot still locate what the problem is. Any hints?
>
>   
>
> Also, is there a better / cleaner way to create a number of OIDs with 
> specific values? I looked through the examples in the SampleAgent 
> class, but there is no clear example of how that could be done.
>
>   
>
> Thanks for any help
>
>   
>
> Marek
>
> _______________________________________________
> SNMP4J mailing list
> SNMP4J at agentpp.org
> http://lists.agentpp.org/mailman/listinfo/snmp4j

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