Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9041#discussion_r41589229
--- Diff:
external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumePollingInputDStream.scala
---
@@ -93,7 +93,11 @@ private[streaming] class FlumePollingReceiver(
override def onStop(): Unit = {
logInfo("Shutting down Flume Polling Receiver")
- receiverExecutor.shutdownNow()
+ receiverExecutor.shutdown()
+ // Wait for a minute for the threads to die
--- End diff --
nit: "Wait up to" a minute.
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