Unlimited cardinality in SDK metrics (potentially breaking change in OTEL 1.43.0 -> 1.44.0) update

pfcoperez · pfcoperez · commit 4cc2778c987c · 2026-07-02T14:39:44.000+02:00
diff --git a/flow/otel_metrics/otel_manager.go b/flow/otel_metrics/otel_manager.go
@@ -741,6 +741,9 @@ func setupMetricsAndProvider(
 		sdkmetric.WithReader(sdkmetric.NewPeriodicReader(metricExporter)),
 		sdkmetric.WithResource(otelResource),
 		sdkmetric.WithView(views...),
+		// otel v1.44.0 introduced a default cardinality limit of 2000 per instrument;
+		// 0 disables it, preserving the previous unlimited behavior
+		sdkmetric.WithCardinalityLimit(0),
 	)
 	return meterProvider, nil
 }

Original file line number	Diff line number	Diff line change
`@@ -741,6 +741,9 @@ func setupMetricsAndProvider(`
`741`	`741`	`sdkmetric.WithReader(sdkmetric.NewPeriodicReader(metricExporter)),`
`742`	`742`	`sdkmetric.WithResource(otelResource),`
`743`	`743`	`sdkmetric.WithView(views...),`
	`744`	`+ // otel v1.44.0 introduced a default cardinality limit of 2000 per instrument;`
	`745`	`+ // 0 disables it, preserving the previous unlimited behavior`
	`746`	`+ sdkmetric.WithCardinalityLimit(0),`
`744`	`747`	`)`
`745`	`748`	`return meterProvider, nil`
`746`	`749`	`}`