JuliusBrussee/caveman · error

session_id and model required

Error message

session_id and model required

What it means

Error "session_id and model required" thrown in JuliusBrussee/caveman.

Source

Thrown at cacheengine/cachebench/corpus.go:317

func decodeOneJSON(raw []byte, destination any) error {
	if !validUniqueJSONObject(raw) {
		return errors.New("duplicate or invalid JSON")
	}
	decoder := json.NewDecoder(bytes.NewReader(raw))
	if err := decoder.Decode(destination); err != nil {
		return err
	}
	var trailing any
	if err := decoder.Decode(&trailing); err != io.EOF {
		return errors.New("trailing JSON")
	}
	return nil
}

func validateCorpusWire(wire lmcacheRowWire, index int, limits CorpusLimits) (CorpusRow, error) {
	if !validBoundedText(wire.SessionID, 2048, false) || !validBoundedText(wire.Model, 512, false) {
		return CorpusRow{}, errors.New("session_id and model required")
	}
	if wire.OutputLength < 0 || math.IsNaN(wire.PreGap) || math.IsInf(wire.PreGap, 0) || wire.PreGap < 0 || wire.PreGap > maxCorpusGapSeconds {
		return CorpusRow{}, fmt.Errorf("output_length must be non-negative and pre_gap must be within 0..%d seconds", maxCorpusGapSeconds)
	}
	if len(wire.Input) == 0 || !json.Valid(wire.Input) {
		return CorpusRow{}, errors.New("input must be valid non-empty message array")
	}
	if len(wire.SessionID)+len(wire.Model)+len(wire.Input) > limits.MaxRowBytes {
		return CorpusRow{}, fmt.Errorf("row exceeds byte limit %d", limits.MaxRowBytes)
	}
	var messages []CorpusMessage
	if err := json.Unmarshal(wire.Input, &messages); err != nil {
		return CorpusRow{}, fmt.Errorf("decode input: %w", err)
	}
	if len(messages) == 0 || len(messages) > limits.MaxMessagesPerRequest {
		return CorpusRow{}, fmt.Errorf("message count %d outside 1..%d", len(messages), limits.MaxMessagesPerRequest)
	}
	for messageIndex, message := range messages {

View on GitHub (pinned to 27d5a3981a)

Solutions

1. Provide both session_id and model.

When it happens

Trigger: Thrown at cacheengine/cachebench/corpus.go:317 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of JuliusBrussee/caveman@27d5a3981a (2026-08-15). Data as JSON: /api/errors/a359cb0b754a708a. Report an issue: GitHub.