Github user mccheah commented on a diff in the pull request:

    https://github.com/apache/spark/pull/22146#discussion_r211799242
  
    --- Diff: 
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/KubernetesUtils.scala
 ---
    @@ -59,5 +65,23 @@ private[spark] object KubernetesUtils {
         }
       }
     
    +  def loadPodFromTemplate(kubernetesClient: KubernetesClient,
    +                          templateFile: File,
    +                          containerName: String): SparkPod = {
    +    try {
    +      val pod = kubernetesClient.pods().load(templateFile).get()
    +      val container = pod.getSpec.getContainers.asScala
    +        .filter(_.getName == containerName)
    --- End diff --
    
    Can use `require(...exists)`


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