Github user liyinan926 commented on a diff in the pull request:
https://github.com/apache/spark/pull/22608#discussion_r229523966
--- Diff:
resource-managers/kubernetes/integration-tests/src/test/scala/org/apache/spark/deploy/k8s/integrationtest/kerberos/KerberosPVWatcherCache.scala
---
@@ -0,0 +1,119 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.deploy.k8s.integrationtest.kerberos
+
+import io.fabric8.kubernetes.api.model.{PersistentVolume,
PersistentVolumeClaim}
+import io.fabric8.kubernetes.client.{KubernetesClientException, Watch,
Watcher}
+import io.fabric8.kubernetes.client.Watcher.Action
+import org.scalatest.Matchers
+import org.scalatest.concurrent.Eventually
+import scala.collection.JavaConverters._
+
+import
org.apache.spark.deploy.k8s.integrationtest.KubernetesSuite.{INTERVAL, TIMEOUT}
+import org.apache.spark.internal.Logging
+
+/**
+ * This class is responsible for ensuring that the persistent volume
claims are bounded
+ * to the correct persistent volume and that they are both created before
launching the
--- End diff --
With `StatefulSet`s, you probably don't need this.
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