hashicorp/nomad · error

invalid scheduler algorithm: %v

Error message

invalid scheduler algorithm: %v

What it means

SchedulerConfiguration.Validate found a scheduler_algorithm outside the supported values; only "binpack" and "spread" (or empty for the default) are accepted.

Source

Thrown at nomad/structs/operator.go:310

	return schedConfig
}

func (s *SchedulerConfiguration) Canonicalize() {
	if s != nil && s.SchedulerAlgorithm == "" {
		s.SchedulerAlgorithm = SchedulerAlgorithmBinpack
	}
}

func (s *SchedulerConfiguration) Validate() error {
	if s == nil {
		return nil
	}

	switch s.SchedulerAlgorithm {
	case "", SchedulerAlgorithmBinpack, SchedulerAlgorithmSpread:
	default:
		return fmt.Errorf("invalid scheduler algorithm: %v", s.SchedulerAlgorithm)
	}

	return nil
}

// SchedulerConfigurationResponse is the response object that wraps SchedulerConfiguration
type SchedulerConfigurationResponse struct {
	// SchedulerConfig contains scheduler config options
	SchedulerConfig *SchedulerConfiguration

	QueryMeta
}

// SchedulerSetConfigurationResponse is the response object used
// when updating scheduler configuration
type SchedulerSetConfigurationResponse struct {
	// Updated returns whether the config was actually updated
	// Only set when the request uses CAS

View on GitHub (pinned to 482b49bf1a)

Solutions

1. Set scheduler_algorithm to "binpack" or "spread"
2. Leave it empty to keep the canonicalized default

When it happens

Trigger: Thrown at nomad/structs/operator.go:310 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/f44e9a85d4343aaa. Report an issue: GitHub.