[GitHub] [spark] srowen commented on a change in pull request #29836: [SPARK-32964][CORE][DSTREAMS] Pass all `streaming` module UTs in Scala 2.13

[GitBox <gi...@apache.org>]

srowen commented on a change in pull request #29836:
URL: https://github.com/apache/spark/pull/29836#discussion_r492687623



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File path: streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
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@@ -29,8 +28,8 @@ import org.apache.spark.util.Utils
 
 final private[streaming] class DStreamGraph extends Serializable with Logging {
 
-  private val inputStreams = new ArrayBuffer[InputDStream[_]]()
-  private val outputStreams = new ArrayBuffer[DStream[_]]()
+  private var inputStreams = Array.empty[InputDStream[_]]

Review comment:
       What about using mutable.Seq? does that also work?
   This probably is OK to use an Array as setting the streams isn't called many times though




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