if (authenticator != null && fessConfig.getSystemPropertyAsBoolean(SPNEGO_INITIALIZED, false)) {
            return authenticator;
        }
        try {
            // set some System properties
            final SpnegoFilterConfig config = SpnegoFilterConfig.getInstance(new SpengoConfig());

            // pre-authenticate
            authenticator = new org.codelibs.spnego.SpnegoAuthenticator(config);

        // Setup
        OpenIdConnectAuthenticator authenticator = new OpenIdConnectAuthenticator();
        final Map<String, Object> attributes = new HashMap<>();
        String jwtClaim =
                "{\"email\":\"******@****.***\",\"sub\":\"1234567890\",\"name\":\"John Doe\",\"groups\":[\"group1\",\"group2\"]}";

        // Execute
        authenticator.parseJwtClaim(jwtClaim, attributes);

        // Verify

	claims.SetExpiry(UTCNow().Add(defaultJWTExpiry))
	claims.SetAccessKey(accessKey)
	token := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, claims)
	return token.SignedString([]byte(secretKey))
}

// Tests web request authenticator.
func TestWebRequestAuthenticate(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	obj, fsDir, err := prepareFS(ctx)
	if err != nil {
		t.Fatal(err)
	}

	flagset.StringVar(&o.AuthPluginName, "auth-plugin-name", o.AuthPluginName,
		fmt.Sprintf("Authenticator plug-in name. --auth-type=%v must be set with this option",
			RemoteSecretAuthTypePlugin))
	flagset.StringToString("auth-plugin-config", o.AuthPluginConfig,
		fmt.Sprintf("Authenticator plug-in configuration. --auth-type=%v must be set with this option",
			RemoteSecretAuthTypePlugin))
	flagset.Var(&o.Type, "type",

                proxy = new Proxy(Type.HTTP, addr);
                if (StringUtil.isNotBlank(getHttpProxyUsername())) {
                    Authenticator.setDefault(new Authenticator() {
                        @Override
                        protected PasswordAuthentication getPasswordAuthentication() {

    public LoginCredential getLoginCredential() {
        return LaRequestUtil.getOptionalRequest().map(request -> {
            if (logger.isDebugEnabled()) {
                logger.debug("Logging in with OpenID Connect Authenticator");
            }
            final HttpSession session = request.getSession(false);
            if (session != null) {
                final String sesState = (String) session.getAttribute(OIC_STATE);

- The API server now detects and fails on startup if there are conflicting issuers between JWT authenticators and service account configurations. Previously, such configurations would run but could be inconsistently effective depending on the credential. ([#123561](https://github.com/kubernetes/kubernetes/pull/123561), [@enj](https://github.com/enj))

		return
	}

	// It is required that parent user be set.
	if res.Success.User == "" {
		writeSTSErrorResponse(ctx, w, ErrSTSUpstreamError, errors.New("A valid user was not returned by the authenticator."))
		return
	}

	// Expiry is set as minimum of requested value and value allowed by auth
	// plugin.
	expiry := res.Success.MaxValiditySeconds
	if durationParam != "" && requestedDuration < expiry {

- Improve performance of the job controller when handling job update events. ([#127228](https://github.com/kubernetes/kubernetes/pull/127228), [@hakuna-matatah](https://github.com/hakuna-matatah)) [SIG Apps]