Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/20997#discussion_r180222555
--- Diff:
external/kafka-0-10/src/test/scala/org/apache/spark/streaming/kafka010/KafkaDataConsumerSuite.scala
---
@@ -0,0 +1,111 @@
+/*
+ * 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.streaming.kafka010
+
+import java.util.concurrent.{Executors, TimeUnit}
+
+import scala.collection.JavaConverters._
+import scala.util.Random
+
+import org.apache.kafka.clients.consumer.ConsumerConfig._
+import org.apache.kafka.common.TopicPartition
+import org.apache.kafka.common.serialization.ByteArrayDeserializer
+import org.scalatest.BeforeAndAfterAll
+
+import org.apache.spark._
+
+class KafkaDataConsumerSuite extends SparkFunSuite with BeforeAndAfterAll {
+
+ private var testUtils: KafkaTestUtils = _
+
+ override def beforeAll {
+ super.beforeAll()
+ testUtils = new KafkaTestUtils
+ testUtils.setup()
+ }
+
+ override def afterAll {
+ if (testUtils != null) {
+ testUtils.teardown()
+ testUtils = null
+ }
+ super.afterAll()
+ }
+
+ test("concurrent use of KafkaDataConsumer") {
--- End diff --
this is good, but it would be nice to have a test which checks that cached
consumers are re-used when possible. Eg this could pass just by never caching
anything.
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