t8y2/dbx · error

password: %w

Error message

password: %w

What it means

This error is returned while parsing a Hadoop delegation token: the second length-prefixed byte array (the token password/authenticator) could not be read. The identifier parsed fine but the stream ended or the length encoding was corrupt at the password field, so the token is malformed or truncated mid-way.

Source

Thrown at agents/drivers/argo-go/config.go:781

		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
}

func readHadoopByteArray(reader io.ByteReader) ([]byte, error) {
	length, err := readHadoopVInt(reader)

View on GitHub (pinned to c0390bff16)

Solutions

1. Re-copy the complete delegation token string
2. Regenerate the token from the Hive server
3. Verify the token was not split across lines in the config with characters lost
4. Confirm the token encoding matches what the server emitted

Example fix

// before
token := parts[0] // only half the token
// after
token := wholeToken // complete token string from server response

func tokenNotHalfCut(token string) error {
	decoded, err := base64.StdEncoding.DecodeString(token)
	if err != nil { return err }
	// Hadoop tokens carry 4 length-prefixed fields; require a sane minimum
	if len(decoded) < 32 { return errors.New("token likely truncated mid-field") }
	return nil
}

_, _, err := decodeHadoopDelegationToken(token)
if err != nil && strings.Contains(err.Error(), "password") {
	return fmt.Errorf("token truncated at password field; re-fetch from Hive: %w", err)
}

When it happens

Trigger: Decoding a delegation token whose payload ends after the identifier but before the password field can be fully read.

Common situations: Token truncated during copy/paste at roughly the halfway point; partial write into a config file; incompatible token format from a different Kerberos/Hadoop distribution.

Related errors

• identifier: %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/d5d807474e536c13. Report an issue: GitHub.