t8y2/dbx · error

identifier: %w

Error message

identifier: %w

What it means

This error is returned while parsing a Hadoop delegation token: the first length-prefixed byte array (the token identifier) could not be read. It is wrapped by the outer 'decode Hive delegation token' error. It means the token stream is truncated or the length-prefix encoding is corrupt at the identifier field.

Source

Thrown at agents/drivers/argo-go/config.go:777

	var decodeErr error
	for _, encoding := range []*base64.Encoding{
		base64.RawURLEncoding,
		base64.URLEncoding,
		base64.RawStdEncoding,
		base64.StdEncoding,
	} {
		decoded, decodeErr = encoding.DecodeString(encoded)
		if decodeErr == nil {
			break
		}
	}
	if decodeErr != nil {
		return nil, nil, decodeErr
	}
	reader := strings.NewReader(string(decoded))
	identifier, err := readHadoopByteArray(reader)
	if err != nil {
		return nil, nil, fmt.Errorf("identifier: %w", err)
	}
	password, err := readHadoopByteArray(reader)
	if err != nil {
		return nil, nil, fmt.Errorf("password: %w", err)
	}
	if len(identifier) == 0 || len(password) == 0 {
		return nil, nil, errors.New("token identifier and password must be non-empty")
	}
	if _, err := readHadoopByteArray(reader); err != nil {
		return nil, nil, fmt.Errorf("kind: %w", err)
	}
	if _, err := readHadoopByteArray(reader); err != nil {
		return nil, nil, fmt.Errorf("service: %w", err)
	}
	if reader.Len() != 0 {
		return nil, nil, errors.New("token contains trailing data")
	}
	return identifier, password, nil

View on GitHub (pinned to c0390bff16)

Solutions

1. Re-copy the full delegation token and verify its length before use
2. Regenerate the token from the Hive server
3. Confirm the token is a Hadoop delegation token, not another credential type
4. Check that the secret store or config did not strip characters from the token

Example fix

// before
token := cfg.Password // truncated copy-paste
// after
token := loadFullTokenFromSecretStore() // complete base64 token

func tokenLooksComplete(token string) error {
	decoded, err := base64.StdEncoding.DecodeString(token)
	if err != nil { return err }
	if len(decoded) < 16 { return errors.New("token truncated: too short") }
	return nil
}

_, _, err := decodeHadoopDelegationToken(token)
if err != nil {
	if strings.Contains(err.Error(), "identifier") {
		log.Println("token malformed at identifier field — re-fetch token")
	}
	return err
}

When it happens

Trigger: Decoding a delegation token whose base64 payload ends before the identifier field can be fully read, or whose leading VInt length cannot be decoded.

Common situations: Truncated token (copy/paste cut off mid-string); token mangled by newline/whitespace stripping; token built by an incompatible Hadoop version using a different wire format.

Related errors

• password: %w
• kind: %w
• service: %w
• negative length %d
• Hive delegation token authentication requires delegationToke

AI-assisted analysis of t8y2/dbx@c0390bff16 (2026-09-05). Data as JSON: /api/errors/334a162a6f82bd0e. Report an issue: GitHub.