kazuyukitanimura commented on code in PR #3627:
URL: https://github.com/apache/datafusion-comet/pull/3627#discussion_r2881160554


##########
spark/src/main/scala/org/apache/spark/sql/comet/execution/shuffle/NativeBatchDecoderIterator.scala:
##########
@@ -37,26 +36,19 @@ import org.apache.comet.vector.NativeUtil
  */
 case class NativeBatchDecoderIterator(
     in: InputStream,
-    taskContext: TaskContext,
-    decodeTime: SQLMetric)
+    decodeTime: SQLMetric,
+    nativeLib: Native,
+    nativeUtil: NativeUtil,
+    tracingEnabled: Boolean)
     extends Iterator[ColumnarBatch] {
 
   private var isClosed = false
   private val longBuf = ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN)
-  private val native = new Native()
-  private val nativeUtil = new NativeUtil()
-  private val tracingEnabled = CometConf.COMET_TRACING_ENABLED.get()
   private var currentBatch: ColumnarBatch = null
   private var batch = fetchNext()
 
   import NativeBatchDecoderIterator._
 
-  if (taskContext != null) {
-    taskContext.addTaskCompletionListener[Unit](_ => {
-      close()

Review Comment:
   @mbutrovich is this close get called somewhere else? Just making sure



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