dongjoon-hyun commented on a change in pull request #35786:
URL: https://github.com/apache/spark/pull/35786#discussion_r823366653



##########
File path: 
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/features/VolcanoFeatureStep.scala
##########
@@ -44,12 +44,8 @@ private[spark] class VolcanoFeatureStep extends 
KubernetesDriverCustomFeatureCon
 
   override def getAdditionalPreKubernetesResources(): Seq[HasMetadata] = {
     val client = new DefaultVolcanoClient
-
-    val template = if (kubernetesConf.isInstanceOf[KubernetesDriverConf]) {
-      kubernetesConf.get(KUBERNETES_DRIVER_PODGROUP_TEMPLATE_FILE)
-    } else {
-      kubernetesConf.get(KUBERNETES_EXECUTOR_PODGROUP_TEMPLATE_FILE)
-    }
+    // Currently only driver/job-level PodGroup is supported
+    val template = kubernetesConf.get(KUBERNETES_DRIVER_PODGROUP_TEMPLATE_FILE)

Review comment:
       This will work incorrectly because this class uses `with 
KubernetesExecutorCustomFeatureConfigStep`. I'd suggest to throw exception in 
the previous `if .. else ..` statement structure.




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