diff --git a/pkg/ring-controller/agent/vcjobworker.go b/pkg/ring-controller/agent/vcjobworker.go
index a6d5d6d0f2a2edf41faacb4054607dc08b23a1c0..b331a584928e64161a910aa18018bca65e75e523 100644
--- a/pkg/ring-controller/agent/vcjobworker.go
+++ b/pkg/ring-controller/agent/vcjobworker.go
@@ -191,7 +191,12 @@ func (b *VCJobWorker) cacheReadyPods(pods []*apiCoreV1.Pod) error {
 	var err error
 	errs.Range(func(key, value interface{}) bool {
 		if value != nil {
-			err = value.(error)
+			errVal, ok := value.(error)
+			if !ok {
+				hwlog.RunLog.Errorf("failed to convert")
+				return false
+			}
+			err = errVal
 			return false
 		}
 		return true
diff --git a/pkg/ring-controller/agent/vcjobworker_test.go b/pkg/ring-controller/agent/vcjobworker_test.go
index f3f0258a69a48118a3d0229bc0709b5b4b51e66c..66f5058beb77ebfd0b6b74c038b229ac2572c3a2 100644
--- a/pkg/ring-controller/agent/vcjobworker_test.go
+++ b/pkg/ring-controller/agent/vcjobworker_test.go
@@ -19,12 +19,13 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"k8s.io/client-go/kubernetes"
 	"reflect"
 	"sync"
 	"testing"
 	"time"
 
+	"k8s.io/client-go/kubernetes"
+
 	"github.com/agiledragon/gomonkey/v2"
 	"github.com/smartystreets/goconvey/convey"
 	corev1 "k8s.io/api/core/v1"
@@ -214,8 +215,8 @@ func TestValidateRank(t *testing.T) {
 	})
 }
 
-func TestGetOrSetPodIndex(t *testing.T) {
-	convey.Convey("test getOrSetPodIndex", t, func() {
+func TestGetPodIndex(t *testing.T) {
+	convey.Convey("test get PodIndex", t, func() {
 		worker := &WorkerInfo{
 			cachedIndex:       &sync.Map{},
 			taskReplicasTotal: 2,
@@ -256,6 +257,16 @@ func TestGetOrSetPodIndex(t *testing.T) {
 			convey.ShouldEqual(rank, 0)
 			convey.ShouldBeNil(err)
 		})
+	})
+
+}
+
+func TestGetOrSetPodIndex(t *testing.T) {
+	convey.Convey("test getOrSetPodIndex", t, func() {
+		worker := &WorkerInfo{
+			cachedIndex:       &sync.Map{},
+			taskReplicasTotal: 2,
+		}
 		convey.Convey("pod without rankIndex will return normal rank and nil", func() {
 			pod := &corev1.Pod{
 				ObjectMeta: metav1.ObjectMeta{