Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/9317#discussion_r43802502
--- Diff:
core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala ---
@@ -77,6 +77,16 @@ private[spark] class AppClient(
private val registrationRetryThread =
ThreadUtils.newDaemonSingleThreadScheduledExecutor("appclient-registration-retry-thread")
+ private val receiveAndReplyMaxPoolSize = conf.getInt(
--- End diff --
I think a configurable max is not necessary and a small thread pool size
would be enough. There are only two requests using it: `RequestExecutors` and
`KillExecutors`. These messages are used in dynamic allocation. The request
rate is very slow.
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