hashicorp/nomad · error

success_before_passing must be non-negative

Error message

success_before_passing must be non-negative

What it means

validateConsul found a negative success_before_passing value on a Consul check; the pass/fail threshold counters must be non-negative integers.

Source

Thrown at nomad/structs/services.go:442

	// Consul only.
	if sc.Expose {
		// We can however immediately ensure expose is configured only for HTTP
		// and gRPC checks.
		switch checkType {
		case ServiceCheckGRPC, ServiceCheckHTTP: // ok
		default:
			return fmt.Errorf("expose may only be set on HTTP or gRPC checks")
		}
	}

	// passFailCheckTypes are intersection of check types supported by both Consul
	// and Nomad when using the pass/fail check threshold features.
	//
	// Consul only.
	passFailCheckTypes := []string{"tcp", "http", "grpc"}

	if sc.SuccessBeforePassing < 0 {
		return fmt.Errorf("success_before_passing must be non-negative")
	} else if sc.SuccessBeforePassing > 0 && !slices.Contains(passFailCheckTypes, sc.Type) {
		return fmt.Errorf("success_before_passing not supported for check of type %q", sc.Type)
	}

	if sc.FailuresBeforeCritical < 0 {
		return fmt.Errorf("failures_before_critical must be non-negative")
	} else if sc.FailuresBeforeCritical > 0 && !slices.Contains(passFailCheckTypes, sc.Type) {
		return fmt.Errorf("failures_before_critical not supported for check of type %q", sc.Type)
	}

	if sc.FailuresBeforeWarning < 0 {
		return fmt.Errorf("failures_before_warning must be non-negative")
	} else if sc.FailuresBeforeWarning > 0 && !slices.Contains(passFailCheckTypes, sc.Type) {
		return fmt.Errorf("failures_before_warning not supported for check of type %q", sc.Type)
	}

	// Arbitrary value, we could bump it if needed
	if len(sc.Notes) > 255 {

View on GitHub (pinned to 482b49bf1a)

Solutions

1. Set success_before_passing to 0 or a positive integer

When it happens

Trigger: Thrown at nomad/structs/services.go:442 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hashicorp/nomad@482b49bf1a (2026-09-04). Data as JSON: /api/errors/5c520cfc4f5c2cb1. Report an issue: GitHub.