Problem: empty JNDI Context, weird name space

Question

Hello,
I am unable to deploy our EAR file and one of the suspicious things is that if I print out the 'InitialContext' (the JNDI Context), I get nothing!.
Here is the code:
InitialContext jndiContext = new InitialContext();
System.out.println("CONTEXT: " + jndiContext);
System.out.println("ENV: " + jndiContext.getEnvironment());
System.out.println("NAME: " + jndiContext.getNameInNamespace());
And this is the output I get:
05/01/18 15:45:50 CONTEXT: javax.naming.InitialContext@18c4a7f
05/01/18 15:45:50 CONTEXT ENV: {} <=== empty!?
05/01/18 15:45:50 CONTEXT NAME: wgen <=== where is this 'wgen' coming from!?
I see 2 issues here:
1. Why is the Context environment empty? It shouldn't be empty!
2. Where does the Context name of 'wgen' come from? I do not have 'wgen' mentioned anywhere in ejb-jar.xml
So then I tried fixing issue 1 by creating the Context environment programmatically:
java.util.Hashtable env = new java.util.Hashtable();
env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.ApplicationInitialContextFactory");
env.put(javax.naming.Context.SECURITY_PRINCIPAL, "jazn.com/admin");
env.put(javax.naming.Context.SECURITY_CREDENTIALS, "admin2");
env.put(javax.naming.Context.PROVIDER_URL, "opmn:ormi://localhost:3201:OAS1.bray/wgen")
InitialContext jndiContext = new InitialContext(env);
This still produced an empty environment.
Has anyone got aaaany ideas about this?
Where is OAs/OC4J getting that 'wgen' context from? How do you populate the JNDI environment? It's as if the JNDI is completely brain-dead.... and it's possible that it's just misconfigured. All I have in my j2ee/config/ dir is a jndi.properties file that looks like this:
java.naming.factory.initial=com.evermind.server.ApplicationInitialContextFactory
java.naming.provider.url=opmn:ormi://localhost:6003:OAS1.bray/wgen
java.naming.security.principal=admin
java.naming.security.credentials=admin2
Thanks,
Otis

Answer 1

I would say there is nothing wrong with JNDI in your oc4j. The very fact that the CONTEXT NAME is wgen, which is obtained from the
java.naming.provider.url=opmn:ormi://localhost:6003:OAS1.bray/wgen
shows jndi is functioning.
To see more of you jndiContext, run
listContext (jndiContext,"")
after you have added the following method that iterates through the subContexts. Please note that getEnviroment returns the enviroment for the context, not the context itself. It might be empty indeed.
private static void listContext (Context ctx, String indent) {
try {
NamingEnumeration list = ctx.listBindings("");
while (list.hasMore()) {
Binding item = (Binding)list.next();
String className = item.getClassName();
String name = item.getName();
System.out.println(indent+className+" "+name);
Object o = item.getObject();
if (o instanceof javax.naming.Context)
listContext ((Context)o,indent+" ");
catch (NamingException ex) {
ex.printStackTrace();
System.err.println ("List error: "+ex);