cachebench: request %q has incomplete or invalid replay iden

Error message

cachebench: request %q has incomplete or invalid replay identity

What it means

Error "cachebench: request %q has incomplete or invalid replay identity" thrown in JuliusBrussee/caveman.

Source

Thrown at cacheengine/cachebench/trace.go:355

	}
	if err := scanner.Err(); err != nil {
		return nil, fmt.Errorf("cachebench: read trace: %w", err)
	}
	if len(records) == 0 {
		return nil, errors.New("cachebench: no trace records")
	}
	return records, nil
}

// NativeRequest reconstructs exact optimizer input captured by v2 or v3 trace.
// Legacy v1 traces remain readable for observation joins, but cannot drive live
// replay because they omitted routing and economics inputs.
func (record TraceRecord) NativeRequest() (cacheengine.NativeRequest, error) {
	if record.Schema != TraceSchema && record.Schema != TraceSchemaV2 {
		return cacheengine.NativeRequest{}, fmt.Errorf("cachebench: request %q needs %s or %s for reconstruction", record.RequestID, TraceSchemaV2, TraceSchema)
	}
	if !validTraceIdentity(record) || !validTimingBasis(record.TimingBasis) || record.ExpectedRPM <= 0 || record.ExpectedCalls <= 0 || record.PrefixTokens < 0 || !validUniqueJSONObject(record.Body) || record.BodySHA256 != bodyDigest(record.Body) || record.StableSegmentCount < 0 || record.StableSegmentCount > len(record.Prefix) || !validPrefix(record.Prefix) {
		return cacheengine.NativeRequest{}, fmt.Errorf("cachebench: request %q has incomplete or invalid replay identity", record.RequestID)
	}
	return cacheengine.NativeRequest{
		Scope: record.Scope, Epoch: record.Epoch, PartitionKey: record.PartitionKey,
		ExpectedRequestsPerMinute: record.ExpectedRPM, ExpectedCalls: record.ExpectedCalls,
		Provider: record.Provider, Model: record.Model, Region: record.Region, Endpoint: record.Endpoint,
		Body: append([]byte(nil), record.Body...), RuntimeMode: record.RuntimeMode, AuthMode: record.AuthMode,
		PrefixTokens: record.PrefixTokens,
	}, nil
}

func validTraceIdentity(record TraceRecord) bool {
	return validBoundedText(record.RequestID, 512, false) &&
		validBoundedText(record.Provider, 64, false) &&
		validBoundedText(record.Model, 512, false) &&
		validBoundedText(record.Region, 64, true) &&
		validBoundedText(record.Endpoint, 512, false) &&
		validBoundedText(record.Epoch, 1024, false) &&
		validBoundedText(record.Scope, 1024, false) &&

View on GitHub (pinned to 27d5a3981a)

Solutions

Fix the replay identity on the request.

When it happens

Trigger: Thrown at cacheengine/cachebench/trace.go:355 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/1dd287a4b140d43e. Report an issue: GitHub.