diff --git a/internal/webhook/sparkpod_defaulter.go b/internal/webhook/sparkpod_defaulter.go
index a1f807b88..cc724a660 100644
--- a/internal/webhook/sparkpod_defaulter.go
+++ b/internal/webhook/sparkpod_defaulter.go
@@ -23,6 +23,7 @@ import (
 
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -49,15 +50,19 @@ type SparkPodDefaulter struct {
 var _ admission.CustomDefaulter = &SparkPodDefaulter{}
 
 // NewSparkPodDefaulter creates a new SparkPodDefaulter instance.
-func NewSparkPodDefaulter(client client.Client, sparkJobNamespaces []string) *SparkPodDefaulter {
-	m := make(map[string]bool)
-	for _, ns := range sparkJobNamespaces {
-		m[ns] = true
+func NewSparkPodDefaulter(client client.Client, namespaces []string) *SparkPodDefaulter {
+	nsMap := make(map[string]bool)
+	if len(namespaces) == 0 {
+		nsMap[metav1.NamespaceAll] = true
+	} else {
+		for _, ns := range namespaces {
+			nsMap[ns] = true
+		}
 	}
 
 	return &SparkPodDefaulter{
 		client:             client,
-		sparkJobNamespaces: m,
+		sparkJobNamespaces: nsMap,
 	}
 }
 
@@ -93,7 +98,7 @@ func (d *SparkPodDefaulter) Default(ctx context.Context, obj runtime.Object) err
 }
 
 func (d *SparkPodDefaulter) isSparkJobNamespace(ns string) bool {
-	return d.sparkJobNamespaces[ns]
+	return d.sparkJobNamespaces[metav1.NamespaceAll] || d.sparkJobNamespaces[ns]
 }
 
 type mutateSparkPodOption func(pod *corev1.Pod, app *v1beta2.SparkApplication) error