private static void initializeGemFireContext() throws NamingException {
    Hashtable table = new Hashtable();
    table.put(Context.INITIAL_CONTEXT_FACTORY,
        "org.apache.geode.internal.jndi.InitialContextFactoryImpl");
    ctx = new InitialContext(table);
  }
Initialises the GemFire context. This is called when no external JNDI Context is found.
geode-core/src/main/java/org/apache/geode/internal/jndi/JNDIInvoker.java