Why does the JndiLoginInitialContextFactory leak instances of SecurityAssociation$SubjectContext in JBoss?

Issue

• During a profiling of our application we see the object count of SecurityAssociation$SubjectContext continually increasing over time.

• We instantiate a new InitialContext (JndiLoginInitialContextFactory) with authentication information, then close it and this operation leaks SecurityAssociation$SubjectContext.

  public void onMessage(Message msg) {
    try {
      Properties env = new Properties();
      env.setProperty(Context.SECURITY_PRINCIPAL, "admin");
      env.setProperty(Context.SECURITY_CREDENTIALS, "admin");
      env.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.security.jndi.JndiLoginInitialContextFactory");
      InitialContext ic = new InitialContext(env);
      ic.close();
    } catch (Exception e) {
      System.out.println(e.getMessage());
    }   
  }