t8y2/dbx · error

kind: %w

Error message

kind: %w

What it means

This error means the kind field of the Hadoop delegation token could not be read. After identifier and password parse successfully, the parser expects two more length-prefixed fields (kind and service); failure on the kind field means the payload is malformed or shorter than expected. The identifier/password emptiness check has already passed at this point.

Source

Thrown at agents/drivers/hive-go/config.go:790

		}
	}
	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)
	if err != nil {
		return nil, err
	}
	if length < 0 {
		return nil, fmt.Errorf("negative length %d", length)
	}

View on GitHub (pinned to c0390bff16)

Solutions

1. Use a delegation token issued by the actual Hive/Hadoop server (Token[HIVE_DELEGATION_TOKEN])
2. Re-encode the token from the server's TokenIdentifier rather than crafting it manually
3. Compare byte layout with a known-good token to identify the structural mismatch

if err != nil && strings.Contains(err.Error(), "kind:") {
	return fmt.Errorf("token not a standard Hadoop format: %w", err)
}

When it happens

Trigger: A token whose bytes end after identifier+password, or whose kind field length prefix is invalid, e.g. a hand-rolled or foreign token format.

Common situations: Tokens from custom Hadoop-compatible systems with a different field order; manually constructed tokens in tests; truncated serialization.

Related errors

• token identifier and password must be non-empty
• token contains trailing data
• identifier: %w
• password: %w
• service: %w

AI-assisted analysis of t8y2/dbx@c0390bff16 (2026-09-05). Data as JSON: /api/errors/418adb157b1d4248. Report an issue: GitHub.