apache/hadoop · error · ServletException

Authentication provider URL must not be null - configure: au

Error message

Authentication provider URL must not be null - configure: authentication.provider.url

What it means

Error "Authentication provider URL must not be null - configure: authentication.provider.url" thrown in apache/hadoop.

Source

Thrown at hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/JWTRedirectAuthenticationHandler.java:116

  /**
   * Initializes the authentication handler instance.
   * <p>
   * This method is invoked by the {@link AuthenticationFilter#init} method.
   * </p>
   * @param config
   *          configuration properties to initialize the handler.
   *
   * @throws ServletException
   *           thrown if the handler could not be initialized.
   */
  @Override
  public void init(Properties config) throws ServletException {
    super.init(config);
    // setup the URL to redirect to for authentication
    authenticationProviderUrl = config
        .getProperty(AUTHENTICATION_PROVIDER_URL);
    if (authenticationProviderUrl == null) {
      throw new ServletException(
          "Authentication provider URL must not be null - configure: "
              + AUTHENTICATION_PROVIDER_URL);
    }

    // setup the public key of the token issuer for verification
    if (publicKey == null) {
      String pemPublicKey = config.getProperty(PUBLIC_KEY_PEM);
      if (pemPublicKey == null) {
        throw new ServletException(
            "Public key for signature validation must be provisioned.");
      }
      publicKey = CertificateUtil.parseRSAPublicKey(pemPublicKey);
    }
    // setup the list of valid audiences for token validation
    String auds = config.getProperty(EXPECTED_JWT_AUDIENCES);
    if (auds != null) {
      // parse into the list
      String[] audArray = auds.split(",");

View on GitHub (pinned to 2add963021)

Solutions

  1. Configure the 'authentication.provider.url' property in the AuthenticationFilter init parameters to point at the authentication provider URL.

Example fix

Add init-param authentication.provider.url=https://provider.example.com/auth to the filter config.

When it happens

Trigger: Raised at runtime when the documented precondition or configuration requirement for this operation is violated.

Common situations: Misconfigured or missing property, invalid user input, or calling the API before its prerequisites are met.

Understand the failure class

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/183867b874631027. Report an issue: GitHub.