diff --git a/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerApiClient.ts b/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerApiClient.ts
index 5cbd357838..4a891e8852 100644
--- a/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerApiClient.ts
+++ b/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerApiClient.ts
@@ -9,12 +9,12 @@ import { GeneralK8sClient, KubernetesCRDClient } from '../kubernetesApiClient';
 /**
  * FrameworkController Client
  */
-abstract class FrameworkControllerClient extends KubernetesCRDClient {
+class FrameworkControllerClientFactory {
     /**
      * Factory method to generate operator client
      */
     // tslint:disable-next-line:function-name
-    public static generateFrameworkControllerClient(): KubernetesCRDClient {
+    public static createClient(): KubernetesCRDClient {
         return new FrameworkControllerClientV1();
     }
 }
@@ -22,7 +22,7 @@ abstract class FrameworkControllerClient extends KubernetesCRDClient {
 /**
  * FrameworkController ClientV1
  */
-class FrameworkControllerClientV1 extends FrameworkControllerClient {
+class FrameworkControllerClientV1 extends KubernetesCRDClient {
     /**
      * constructor, to initialize frameworkcontroller CRD definition
      */
@@ -43,4 +43,4 @@ class FrameworkControllerClientV1 extends FrameworkControllerClient {
     }
 }
 
-export { FrameworkControllerClient, GeneralK8sClient };
+export { FrameworkControllerClientFactory, GeneralK8sClient };
diff --git a/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerTrainingService.ts b/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerTrainingService.ts
index 83e70ddea5..fe51c38cf8 100644
--- a/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerTrainingService.ts
+++ b/src/nni_manager/training_service/kubernetes/frameworkcontroller/frameworkcontrollerTrainingService.ts
@@ -19,7 +19,7 @@ import { AzureStorageClientUtility } from '../azureStorageClientUtils';
 import { NFSConfig } from '../kubernetesConfig';
 import { KubernetesTrialJobDetail } from '../kubernetesData';
 import { KubernetesTrainingService } from '../kubernetesTrainingService';
-import { FrameworkControllerClient } from './frameworkcontrollerApiClient';
+import { FrameworkControllerClientFactory } from './frameworkcontrollerApiClient';
 import { FrameworkControllerClusterConfig, FrameworkControllerClusterConfigAzure, FrameworkControllerClusterConfigFactory,
     FrameworkControllerClusterConfigNFS, FrameworkControllerTrialConfig} from './frameworkcontrollerConfig';
 import { FrameworkControllerJobInfoCollector } from './frameworkcontrollerJobInfoCollector';
@@ -142,7 +142,7 @@ class FrameworkControllerTrainingService extends KubernetesTrainingService imple
                         nfsFrameworkControllerClusterConfig.nfs.path
                     );
                 }
-                this.kubernetesCRDClient = FrameworkControllerClient.generateFrameworkControllerClient();
+                this.kubernetesCRDClient = FrameworkControllerClientFactory.createClient();
                 break;
             case TrialConfigMetadataKey.TRIAL_CONFIG:
                 const frameworkcontrollerTrialJsonObjsect: any = JSON.parse(value);
diff --git a/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowApiClient.ts b/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowApiClient.ts
index e6e04b0afd..dacf2229d0 100644
--- a/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowApiClient.ts
+++ b/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowApiClient.ts
@@ -7,55 +7,9 @@ import * as fs from 'fs';
 import { GeneralK8sClient, KubernetesCRDClient } from '../kubernetesApiClient';
 import { KubeflowOperator } from './kubeflowConfig';
 
-/**
- * KubeflowOperator Client
- */
-abstract class KubeflowOperatorClient extends KubernetesCRDClient {
-    /**
-     * Factory method to generate operator client
-     */
-    // tslint:disable-next-line:function-name
-    public static generateOperatorClient(kubeflowOperator: KubeflowOperator,
-                                         operatorApiVersion: string): KubernetesCRDClient {
-        switch (kubeflowOperator) {
-            case 'tf-operator': {
-                switch (operatorApiVersion) {
-                    case 'v1alpha2': {
-                        return new TFOperatorClientV1Alpha2();
-                    }
-                    case 'v1beta1': {
-                        return new TFOperatorClientV1Beta1();
-                    }
-                    case 'v1beta2': {
-                        return new TFOperatorClientV1Beta2();
-                    }
-                    default:
-                        throw new Error(`Invalid tf-operator apiVersion ${operatorApiVersion}`);
-                }
-            }
-            case 'pytorch-operator': {
-                switch (operatorApiVersion) {
-                    case 'v1alpha2': {
-                        return new PyTorchOperatorClientV1Alpha2();
-                    }
-                    case 'v1beta1': {
-                        return new PyTorchOperatorClientV1Beta1();
-                    }
-                    case 'v1beta2': {
-                        return new PyTorchOperatorClientV1Beta2();
-                    }
-                    default:
-                        throw new Error(`Invalid pytorch-operator apiVersion ${operatorApiVersion}`);
-                }
-            }
-            default:
-                throw new Error(`Invalid operator ${kubeflowOperator}`);
-        }
-    }
-}
 
 // tslint:disable: no-unsafe-any no-any completed-docs
-class TFOperatorClientV1Alpha2 extends KubeflowOperatorClient {
+class TFOperatorClientV1Alpha2 extends KubernetesCRDClient {
     /**
      * constructor, to initialize tfjob CRD definition
      */
@@ -112,7 +66,7 @@ class TFOperatorClientV1Beta2 extends KubernetesCRDClient {
     }
 }
 
-class PyTorchOperatorClientV1Alpha2 extends KubeflowOperatorClient {
+class PyTorchOperatorClientV1Alpha2 extends KubernetesCRDClient {
     /**
      * constructor, to initialize tfjob CRD definition
      */
@@ -169,5 +123,51 @@ class PyTorchOperatorClientV1Beta2 extends KubernetesCRDClient {
     }
 }
 
+/**
+ * KubeflowOperator Client
+ */
+class KubeflowOperatorClientFactory {
+    /**
+     * Factory method to generate operator client
+     */
+    // tslint:disable-next-line:function-name
+    public static createClient(kubeflowOperator: KubeflowOperator, operatorApiVersion: string): KubernetesCRDClient {
+        switch (kubeflowOperator) {
+            case 'tf-operator': {
+                switch (operatorApiVersion) {
+                    case 'v1alpha2': {
+                        return new TFOperatorClientV1Alpha2();
+                    }
+                    case 'v1beta1': {
+                        return new TFOperatorClientV1Beta1();
+                    }
+                    case 'v1beta2': {
+                        return new TFOperatorClientV1Beta2();
+                    }
+                    default:
+                        throw new Error(`Invalid tf-operator apiVersion ${operatorApiVersion}`);
+                }
+            }
+            case 'pytorch-operator': {
+                switch (operatorApiVersion) {
+                    case 'v1alpha2': {
+                        return new PyTorchOperatorClientV1Alpha2();
+                    }
+                    case 'v1beta1': {
+                        return new PyTorchOperatorClientV1Beta1();
+                    }
+                    case 'v1beta2': {
+                        return new PyTorchOperatorClientV1Beta2();
+                    }
+                    default:
+                        throw new Error(`Invalid pytorch-operator apiVersion ${operatorApiVersion}`);
+                }
+            }
+            default:
+                throw new Error(`Invalid operator ${kubeflowOperator}`);
+        }
+    }
+}
+
 // tslint:enable: no-unsafe-any
-export { KubeflowOperatorClient, GeneralK8sClient };
+export { KubeflowOperatorClientFactory, GeneralK8sClient };
diff --git a/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowTrainingService.ts b/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowTrainingService.ts
index c68da845f4..93b86e17a4 100644
--- a/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowTrainingService.ts
+++ b/src/nni_manager/training_service/kubernetes/kubeflow/kubeflowTrainingService.ts
@@ -21,7 +21,7 @@ import { AzureStorageClientUtility } from '../azureStorageClientUtils';
 import { NFSConfig } from '../kubernetesConfig';
 import { KubernetesTrialJobDetail } from '../kubernetesData';
 import { KubernetesTrainingService } from '../kubernetesTrainingService';
-import { KubeflowOperatorClient } from './kubeflowApiClient';
+import { KubeflowOperatorClientFactory } from './kubeflowApiClient';
 import { KubeflowClusterConfig, KubeflowClusterConfigAzure, KubeflowClusterConfigFactory, KubeflowClusterConfigNFS,
     KubeflowTrialConfig, KubeflowTrialConfigFactory, KubeflowTrialConfigPytorch, KubeflowTrialConfigTensorflow
 } from './kubeflowConfig';
@@ -136,8 +136,8 @@ class KubeflowTrainingService extends KubernetesTrainingService implements Kuber
                         nfsKubeflowClusterConfig.nfs.path
                     );
                 }
-                this.kubernetesCRDClient = KubeflowOperatorClient.generateOperatorClient(this.kubeflowClusterConfig.operator,
-                                                                                         this.kubeflowClusterConfig.apiVersion);
+                this.kubernetesCRDClient = KubeflowOperatorClientFactory.createClient(
+                    this.kubeflowClusterConfig.operator, this.kubeflowClusterConfig.apiVersion);
                 break;
 
             case TrialConfigMetadataKey.TRIAL_CONFIG: