Github user mccheah commented on a diff in the pull request:
https://github.com/apache/spark/pull/22639#discussion_r223518123
--- Diff:
resource-managers/kubernetes/integration-tests/src/test/scala/org/apache/spark/deploy/k8s/integrationtest/StreamingCompatibilitySuite.scala
---
@@ -0,0 +1,220 @@
+/*
+ * 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
+
+import java.net._
+
+import scala.collection.JavaConverters._
+import scala.concurrent.ExecutionContext.Implicits.global
+import scala.concurrent.Future
+
+import io.fabric8.kubernetes.api.model.Service
+import org.scalatest.concurrent.{Eventually, PatienceConfiguration}
+import org.scalatest.time.{Minutes, Span}
+
+import org.apache.spark.deploy.k8s.integrationtest.KubernetesSuite._
+import org.apache.spark.util
+
+private[spark] trait StreamingCompatibilitySuite {
+
+ k8sSuite: KubernetesSuite =>
+
+ private def startSocketServer(): (String, Int, ServerSocket) = {
--- End diff --
Is this the submission client starting a server, and then the pod needs to
be able to connect to the submission client host and port? An alternative is to
deploy a separate pod that does this so that network communications are
pod-to-pod instead of pod-to-host.
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