Addressed more comments

Author: liyinan926

resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/Config.scala

@@ -155,8 +155,8 @@ private[spark] object Config extends Logging {
     ConfigBuilder("spark.kubernetes.mountDependencies.timeout")
       .doc("Timeout before aborting the attempt to download and unpack dependencies from remote " +
         "locations into the driver and executor pods.")
-      .timeConf(TimeUnit.MINUTES)
-      .createWithDefault(5)
+      .timeConf(TimeUnit.SECONDS)
+      .createWithDefault(300)
 
   val INIT_CONTAINER_MAX_THREAD_POOL_SIZE =
     ConfigBuilder("spark.kubernetes.mountDependencies.maxSimultaneousDownloads")

resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/DriverConfigOrchestrator.scala

@@ -127,7 +127,7 @@ private[spark] class DriverConfigOrchestrator(
       Nil
     }
 
-    val initContainerBootstrapStep = if (areAnyFilesNonContainerLocal(sparkJars ++ sparkFiles)) {
+    val initContainerBootstrapStep = if (existNonContainerLocalFiles(sparkJars ++ sparkFiles)) {
       val orchestrator = new InitContainerConfigOrchestrator(
         sparkJars,
         sparkFiles,
@@ -162,7 +162,7 @@ private[spark] class DriverConfigOrchestrator(
       mountSecretsStep
   }
 
-  private def areAnyFilesNonContainerLocal(files: Seq[String]): Boolean = {
+  private def existNonContainerLocalFiles(files: Seq[String]): Boolean = {
     files.exists { uri =>
       Utils.resolveURI(uri).getScheme != "local"
     }

resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/rest/k8s/SparkPodInitContainer.scala

@@ -73,9 +73,9 @@ private[spark] class SparkPodInitContainer(
   private def downloadFiles(
       filesCommaSeparated: Option[String],
       downloadDir: File,
-      errMessageOnDestinationNotADirectory: String): Unit = {
+      errMessage: String): Unit = {
     filesCommaSeparated.foreach { files =>
-      require(downloadDir.isDirectory, errMessageOnDestinationNotADirectory)
+      require(downloadDir.isDirectory, errMessage)
       Utils.stringToSeq(files).foreach { file =>
         Future[Unit] {
           fileFetcher.fetchFile(file, downloadDir)

resource-managers/kubernetes/core/src/main/scala/org/apache/spark/scheduler/cluster/k8s/KubernetesClusterManager.scala

@@ -49,12 +49,12 @@ private[spark] class KubernetesClusterManager extends ExternalClusterManager wit
     val initContainerConfigMapKey = sparkConf.get(INIT_CONTAINER_CONFIG_MAP_KEY_CONF)
 
     if (initContainerConfigMap.isEmpty) {
-      logWarning("The executor's init-container config map was not specified. Executors will " +
+      logWarning("The executor's init-container config map is not specified. Executors will " +
         "therefore not attempt to fetch remote or submitted dependencies.")
     }
 
     if (initContainerConfigMapKey.isEmpty) {
-      logWarning("The executor's init-container config map key was not specified. Executors will " +
+      logWarning("The executor's init-container config map key is not specified. Executors will " +
         "therefore not attempt to fetch remote or submitted dependencies.")
     }