Github user huaxingao commented on a diff in the pull request: https://github.com/apache/spark/pull/11250#discussion_r53430913 --- Diff: extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala --- @@ -241,13 +243,13 @@ abstract class KinesisStreamTests(aggregateTestData: Boolean) extends KinesisFun kinesisStream.foreachRDD((rdd: RDD[Array[Byte]], time: Time) => { val kRdd = rdd.asInstanceOf[KinesisBackedBlockRDD[Array[Byte]]] val data = rdd.map { bytes => new String(bytes).toInt }.collect().toSeq - collectedData(time) = (kRdd.arrayOfseqNumberRanges, data) + collectedData.put(time, (kRdd.arrayOfseqNumberRanges, data)) }) ssc.remember(Minutes(60)) // remember all the batches so that they are all saved in checkpoint ssc.start() - def numBatchesWithData: Int = collectedData.count(_._2._2.nonEmpty) + def numBatchesWithData: Int = collectedData.asScala.count(_._2._2.nonEmpty) --- End diff -- @srowen Thanks for your comment. For the 5 files I changed, I will remove the usage of Java ConcurrentHashMap, and use mutable.HashMap instead. I will wrap every mutable.HashMap operation in a synchronized block.
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