Github user markhamstra commented on a diff in the pull request:
https://github.com/apache/spark/pull/16189#discussion_r91764815
--- Diff: core/src/main/scala/org/apache/spark/executor/Executor.scala ---
@@ -84,6 +84,16 @@ private[spark] class Executor(
// Start worker thread pool
private val threadPool = ThreadUtils.newDaemonCachedThreadPool("Executor
task launch worker")
private val executorSource = new ExecutorSource(threadPool, executorId)
+ // Pool used for threads that supervise task killing / cancellation
+ private val taskReaperPool = ThreadUtils.newDaemonCachedThreadPool("Task
reaper")
+ // For tasks which are in the process of being killed, this map the most
recently created
--- End diff --
That sentence no verb.
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