YARN AltKerberos HTTP Authentication doesn't work

   String authType = filterConfig.get(AuthenticationFilter.AUTH_TYPE);


    LOG.info("AuthType Configured: "+authType);
    if (authType.equals(PseudoAuthenticationHandler.TYPE)) {

      filterConfig.put(AuthenticationFilter.AUTH_TYPE,
          PseudoDelegationTokenAuthenticationHandler.class.getName());
        LOG.info("AuthType: PseudoDelegationTokenAuthenticationHandler");

    } else if (authType.equals(KerberosAuthenticationHandler.TYPE) || (UserGroupInformation.isSecurityEnabled() && conf.get("hadoop.security.authentication").equals(KerberosAuthenticationHandler.TYPE))) {

      if (!(authType.equals(KerberosAuthenticationHandler.TYPE))) {
        filterConfig.put(AuthenticationFilter.AUTH_TYPE,
          authType);
        LOG.info("AuthType: "+authType);
      } else {
        filterConfig.put(AuthenticationFilter.AUTH_TYPE,
          KerberosDelegationTokenAuthenticationHandler.class.getName());
        LOG.info("AuthType: KerberosDelegationTokenAuthenticationHandler");
      } 


      // Resolve _HOST into bind address
      String bindAddress = conf.get(HttpServer2.BIND_ADDRESS);
      String principal =
          filterConfig.get(KerberosAuthenticationHandler.PRINCIPAL);
      if (principal != null) {
        try {
          principal = SecurityUtil.getServerPrincipal(principal, bindAddress);
        } catch (IOException ex) {
          throw new RuntimeException(
              "Could not resolve Kerberos principal name: " + ex.toString(), ex);
        }
        filterConfig.put(KerberosAuthenticationHandler.PRINCIPAL,
            principal);
      }
    }