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(oidNumberOfMusicFiles,
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.agent.mo
.MOAccessImpl@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.agent.mo
.MOAccessImpl@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.java: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.java: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
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