rangadi commented on code in PR #42460:
URL: https://github.com/apache/spark/pull/42460#discussion_r1296652197
##########
core/src/main/scala/org/apache/spark/api/python/PythonWorkerFactory.scala:
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@@ -36,7 +36,7 @@ import org.apache.spark.util.{RedirectThread, Utils}
case class PythonWorker(channel: SocketChannel, selector: Selector,
selectionKey: SelectionKey) {
def stop(): Unit = {
- selectionKey.cancel()
+ Option(selectionKey).foreach(_.cancel())
Review Comment:
@bogao007 this fixes NPE.
cc: @utkarsh39
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