apache/hadoop · error · IllegalArgumentException

Unsupported HTTP authentication scheme %s . Supported scheme

Error message

Unsupported HTTP authentication scheme %s . Supported schemes are [%s, %s, %s]

What it means

Error "Unsupported HTTP authentication scheme %s . Supported schemes are [%s, %s, %s]" thrown in apache/hadoop.

Source

Thrown at hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/AuthenticationHandlerUtil.java:84

  /**
   * This method checks if the specified HTTP authentication <code>scheme</code>
   * value is valid.
   *
   * @param scheme HTTP authentication scheme to be checked
   * @return Canonical representation of HTTP authentication scheme
   * @throws IllegalArgumentException In case the specified value is not a valid
   *           HTTP authentication scheme.
   */
  public static String checkAuthScheme(String scheme) {
    if (BASIC.equalsIgnoreCase(scheme)) {
      return BASIC;
    } else if (NEGOTIATE.equalsIgnoreCase(scheme)) {
      return NEGOTIATE;
    } else if (DIGEST.equalsIgnoreCase(scheme)) {
      return DIGEST;
    }
    throw new IllegalArgumentException(String.format(
        "Unsupported HTTP authentication scheme %s ."
            + " Supported schemes are [%s, %s, %s]", scheme, BASIC, NEGOTIATE,
        DIGEST));
  }

  /**
   * This method checks if the specified <code>authToken</code> belongs to the
   * specified HTTP authentication <code>scheme</code>.
   *
   * @param scheme HTTP authentication scheme to be checked
   * @param auth Authentication header value which is to be compared with the
   *          authentication scheme.
   * @return true If the authentication header value corresponds to the
   *         specified authentication scheme false Otherwise.
   */
  public static boolean matchAuthScheme(String scheme, String auth) {
    if (scheme == null) {
      throw new NullPointerException();

View on GitHub (pinned to 2add963021)

Solutions

1. Set the HTTP authentication type to one of the supported schemes (simple, kerberos, or a custom Authenticator class) via the 'hadoop.security.authentication' configuration property.

Example fix

Set hadoop.security.authentication=simple or kerberos in core-site.xml.

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

• Authentication and authorization failures — expired tokens, bad credentials, and missing scopes.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/eaa83edbeeb856c6. Report an issue: GitHub.