Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22143#discussion_r211339535
--- Diff:
external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/KafkaWriteTask.scala
---
@@ -61,12 +63,30 @@ private[kafka010] class KafkaWriteTask(
private[kafka010] abstract class KafkaRowWriter(
inputSchema: Seq[Attribute], topic: Option[String]) {
+ import scala.collection.JavaConverters._
+
+ protected val minOffsetAccumulator:
collection.concurrent.Map[TopicPartition, Long] =
+ new ConcurrentHashMap[TopicPartition, Long]().asScala
--- End diff --
why is this concurrent map?
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