temporalio/temporal · error

unsupported metric exporter type: %T

Error message

unsupported metric exporter type: %T

What it means

Error "unsupported metric exporter type: %T" thrown in temporalio/temporal.

Source

Thrown at common/telemetry/config.go:249

	}
	return out, nil
}

func (ec *exportConfig) MetricExporters() ([]metric.Exporter, error) {
	out := make([]metric.Exporter, 0, len(ec.Exporters))
	for _, expcfg := range ec.Exporters {
		if !strings.HasPrefix(expcfg.Kind.Signal, "metric") {
			continue
		}
		switch spec := expcfg.Spec.(type) {
		case *otlpGrpcMetricExporter:
			metricexp, err := ec.buildOtlpGrpcMetricExporter(spec)
			if err != nil {
				return nil, err
			}
			out = append(out, metricexp)
		default:
			return nil, fmt.Errorf("unsupported metric exporter type: %T", spec)
		}
	}
	return out, nil

}

func (ec *exportConfig) buildOtlpGrpcMetricExporter(
	cfg *otlpGrpcMetricExporter,
) (metric.Exporter, error) {
	dopts := cfg.Connection.dialOpts()
	opts := []otlpmetricgrpc.Option{
		otlpmetricgrpc.WithEndpoint(cfg.Connection.Endpoint),
		otlpmetricgrpc.WithHeaders(cfg.Headers),
		otlpmetricgrpc.WithTimeout(cmp.Or(cfg.Timeout, 10*time.Second)),
		otlpmetricgrpc.WithDialOption(dopts...),
		otlpmetricgrpc.WithRetry(otlpmetricgrpc.RetryConfig{
			Enabled:         cmp.Or(cfg.Retry.Enabled, retryDefaultEnabled),
			InitialInterval: cmp.Or(cfg.Retry.InitialInterval, retryDefaultInitialInterval),

View on GitHub (pinned to bde624efd1)

When it happens

Trigger: Thrown at common/telemetry/config.go:249 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of temporalio/temporal@bde624efd1 (2026-09-01). Data as JSON: /api/errors/0157b328136ae3c8. Report an issue: GitHub.